[td-98] fix bug for query table, tag query cond serialization,

3f9d5cca · hjxilinx · 235b0da1 · 3f9d5cca · 3f9d5cca · 3f9d5cca
31 changed file
--- a/src/client/inc/tscUtil.h
+++ b/src/client/inc/tscUtil.h
@@ -24,6 +24,7 @@ extern "C" {
 * @date   2018/09/30
 */
 #include "os.h"
+#include "tbuffer.h"
 #include "qextbuffer.h"
 #include "taosdef.h"
 #include "tscSecondaryMerge.h"
@@ -176,8 +177,8 @@ void tscIncStreamExecutionCount(void* pStream);
 bool tscValidateColumnId(STableMetaInfo* pTableMetaInfo, int32_t colId);
 // get starter position of metric query condition (query on tags) in SSqlCmd.payload
-SCond* tsGetSTableQueryCondPos(STagCond* pCond, uint64_t tableIndex);
+SCond* tsGetSTableQueryCond(STagCond* pCond, uint64_t uid);
-void   tsSetSTableQueryCond(STagCond* pTagCond, uint64_t uid, const char* str);
+void   tsSetSTableQueryCond(STagCond* pTagCond, uint64_t uid, SBuffer* pBuf);
 void tscTagCondCopy(STagCond* dest, const STagCond* src);
 void tscTagCondRelease(STagCond* pCond);
@@ -199,7 +200,7 @@ int32_t tscGetQueryInfoDetailSafely(SSqlCmd *pCmd, int32_t subClauseIndex, SQuer
 STableMetaInfo* tscGetMeterMetaInfoByUid(SQueryInfo* pQueryInfo, uint64_t uid, int32_t* index);
 void            tscClearMeterMetaInfo(STableMetaInfo* pTableMetaInfo, bool removeFromCache);
-STableMetaInfo* tscAddMeterMetaInfo(SQueryInfo* pQueryInfo, const char* name, STableMeta* pTableMeta, SSuperTableMeta* pMetricMeta,
+STableMetaInfo* tscAddTableMetaInfo(SQueryInfo* pQueryInfo, const char* name, STableMeta* pTableMeta, SArray* vgroupList,
                                    int16_t numOfTags, int16_t* tags);
 STableMetaInfo* tscAddEmptyMetaInfo(SQueryInfo *pQueryInfo);
 int32_t tscAddSubqueryInfo(SSqlCmd *pCmd);

--- a/src/client/inc/tsclient.h
+++ b/src/client/inc/tsclient.h
@@ -43,7 +43,7 @@ struct SSqlInfo;
 typedef struct SSqlGroupbyExpr {
  int16_t     tableIndex;
  int16_t     numOfGroupCols;
-  SColIndexEx columnInfo[TSDB_MAX_TAGS];  // group by columns information
+  SColIndex   columnInfo[TSDB_MAX_TAGS];  // group by columns information
  int16_t     orderIndex;                 // order by column index
  int16_t     orderType;                  // order by type: asc/desc
 } SSqlGroupbyExpr;
@@ -86,7 +86,7 @@ typedef struct STableMetaInfo {
 /* the structure for sql function in select clause */
 typedef struct SSqlExpr {
  char        aliasName[TSDB_COL_NAME_LEN];  // as aliasName
-  SColIndexEx colInfo;
+  SColIndex   colInfo;
  int64_t     uid;            // refactor use the pointer
  int16_t     functionId;     // function id in aAgg array
  int16_t     resType;        // return value type
@@ -141,6 +141,7 @@ struct SLocalReducer;
 typedef struct SCond {
  uint64_t uid;
+  int32_t  len;   // length of tag query condition data
  char *   cond;
 } SCond;
@@ -167,8 +168,7 @@ typedef struct STagCond {
  SJoinInfo joinInfo;
  // for different table, the query condition must be seperated
-  SCond   cond[TSDB_MAX_JOIN_TABLE_NUM];
+  SArray*  pCond;
-  int16_t numOfTagCond;
 } STagCond;
 typedef struct SParamInfo {

--- a/src/client/src/tscAsync.c
+++ b/src/client/src/tscAsync.c
@@ -464,13 +464,15 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
      if (code == TSDB_CODE_ACTION_IN_PROGRESS) return;
    } else {  // normal async query continues
      if (pCmd->isParseFinish) {
-        tscTrace("%p resend data to vnode in metermeta callback since sql has been parsed completed", pSql);
+        tscTrace("%p re-send data to vnode in table Meta callback since sql parsed completed", pSql);
        STableMetaInfo* pTableMetaInfo = tscGetTableMetaInfoFromCmd(pCmd, pCmd->clauseIndex, 0);
        code = tscGetTableMeta(pSql, pTableMetaInfo);
        assert(code == TSDB_CODE_SUCCESS);
        if (pTableMetaInfo->pTableMeta) {
+          // todo update the submit message according to the new table meta
+          // 1. table uid, 2. ip address
          code = tscSendMsgToServer(pSql);
          if (code == TSDB_CODE_SUCCESS) return;
        }

--- a/src/client/src/tscFunctionImpl.c
+++ b/src/client/src/tscFunctionImpl.c
@@ -691,7 +691,7 @@ static int32_t data_req_load_info(SQLFunctionCtx *pCtx, TSKEY start, TSKEY end,
 // todo: if  column in current data block are null, opt for this case
 static int32_t first_data_req_info(SQLFunctionCtx *pCtx, TSKEY start, TSKEY end, int32_t colId) {
-  if (pCtx->order == TSQL_SO_DESC) {
+  if (pCtx->order == TSDB_ORDER_DESC) {
    return BLK_DATA_NO_NEEDED;
  }
@@ -704,7 +704,7 @@ static int32_t first_data_req_info(SQLFunctionCtx *pCtx, TSKEY start, TSKEY end,
 }
 static int32_t last_data_req_info(SQLFunctionCtx *pCtx, TSKEY start, TSKEY end, int32_t colId) {
-  if (pCtx->order == TSQL_SO_ASC) {
+  if (pCtx->order == TSDB_ORDER_ASC) {
    return BLK_DATA_NO_NEEDED;
  }
@@ -716,7 +716,7 @@ static int32_t last_data_req_info(SQLFunctionCtx *pCtx, TSKEY start, TSKEY end,
 }
 static int32_t first_dist_data_req_info(SQLFunctionCtx *pCtx, TSKEY start, TSKEY end, int32_t colId) {
-  if (pCtx->order == TSQL_SO_DESC) {
+  if (pCtx->order == TSDB_ORDER_DESC) {
    return BLK_DATA_NO_NEEDED;
  }
@@ -732,7 +732,7 @@ static int32_t first_dist_data_req_info(SQLFunctionCtx *pCtx, TSKEY start, TSKEY
 }
 static int32_t last_dist_data_req_info(SQLFunctionCtx *pCtx, TSKEY start, TSKEY end, int32_t colId) {
-  if (pCtx->order == TSQL_SO_ASC) {
+  if (pCtx->order == TSDB_ORDER_ASC) {
    return BLK_DATA_NO_NEEDED;
  }
@@ -1483,7 +1483,7 @@ static bool first_last_function_setup(SQLFunctionCtx *pCtx) {
 // todo opt for null block
 static void first_function(SQLFunctionCtx *pCtx) {
-  if (pCtx->order == TSQL_SO_DESC) {
+  if (pCtx->order == TSDB_ORDER_DESC) {
    return;
  }
@@ -1513,7 +1513,7 @@ static void first_function(SQLFunctionCtx *pCtx) {
 }
 static void first_function_f(SQLFunctionCtx *pCtx, int32_t index) {
-  if (pCtx->order == TSQL_SO_DESC) {
+  if (pCtx->order == TSDB_ORDER_DESC) {
    return;
  }
@@ -1561,7 +1561,7 @@ static void first_dist_function(SQLFunctionCtx *pCtx) {
   * 1. data block that are not loaded
   * 2. scan data files in desc order
   */
-  if (pCtx->order == TSQL_SO_DESC) {
+  if (pCtx->order == TSDB_ORDER_DESC) {
    return;
  }
@@ -1596,7 +1596,7 @@ static void first_dist_function_f(SQLFunctionCtx *pCtx, int32_t index) {
    return;
  }
-  if (pCtx->order == TSQL_SO_DESC) {
+  if (pCtx->order == TSDB_ORDER_DESC) {
    return;
  }
@@ -1654,7 +1654,7 @@ static void first_dist_func_second_merge(SQLFunctionCtx *pCtx) {
 *    least one data in this block that is not null.(TODO opt for this case)
 */
 static void last_function(SQLFunctionCtx *pCtx) {
-  if (pCtx->order == TSQL_SO_ASC) {
+  if (pCtx->order == TSDB_ORDER_ASC) {
    return;
  }
@@ -1683,7 +1683,7 @@ static void last_function(SQLFunctionCtx *pCtx) {
 }
 static void last_function_f(SQLFunctionCtx *pCtx, int32_t index) {
-  if (pCtx->order == TSQL_SO_ASC) {
+  if (pCtx->order == TSDB_ORDER_ASC) {
    return;
  }
@@ -1730,7 +1730,7 @@ static void last_dist_function(SQLFunctionCtx *pCtx) {
   * 1. for scan data in asc order, no need to check data
   * 2. for data blocks that are not loaded, no need to check data
   */
-  if (pCtx->order == TSQL_SO_ASC) {
+  if (pCtx->order == TSDB_ORDER_ASC) {
    return;
  }
@@ -1768,7 +1768,7 @@ static void last_dist_function_f(SQLFunctionCtx *pCtx, int32_t index) {
   * 1. for scan data in asc order, no need to check data
   * 2. for data blocks that are not loaded, no need to check data
   */
-  if (pCtx->order == TSQL_SO_ASC) {
+  if (pCtx->order == TSDB_ORDER_ASC) {
    return;
  }
@@ -2420,10 +2420,10 @@ static void top_bottom_func_finalizer(SQLFunctionCtx *pCtx) {
  // user specify the order of output by sort the result according to timestamp
  if (pCtx->param[1].i64Key == PRIMARYKEY_TIMESTAMP_COL_INDEX) {
-    __compar_fn_t comparator = (pCtx->param[2].i64Key == TSQL_SO_ASC) ? resAscComparFn : resDescComparFn;
+    __compar_fn_t comparator = (pCtx->param[2].i64Key == TSDB_ORDER_ASC) ? resAscComparFn : resDescComparFn;
    qsort(tvp, pResInfo->numOfRes, POINTER_BYTES, comparator);
  } else if (pCtx->param[1].i64Key > PRIMARYKEY_TIMESTAMP_COL_INDEX) {
-    __compar_fn_t comparator = (pCtx->param[2].i64Key == TSQL_SO_ASC) ? resDataAscComparFn : resDataDescComparFn;
+    __compar_fn_t comparator = (pCtx->param[2].i64Key == TSDB_ORDER_ASC) ? resDataAscComparFn : resDataDescComparFn;
    qsort(tvp, pResInfo->numOfRes, POINTER_BYTES, comparator);
  }
@@ -2449,7 +2449,7 @@ static bool percentile_function_setup(SQLFunctionCtx *pCtx) {
  int32_t    orderIdx = 0;
  // tOrderDesc object
-  tOrderDescriptor *pDesc = tOrderDesCreate(&orderIdx, NUMOFCOLS, pModel, TSQL_SO_DESC);
+  tOrderDescriptor *pDesc = tOrderDesCreate(&orderIdx, NUMOFCOLS, pModel, TSDB_ORDER_DESC);
  ((SPercentileInfo *)(pResInfo->interResultBuf))->pMemBucket =
      tMemBucketCreate(1024, MAX_AVAILABLE_BUFFER_SIZE, pCtx->inputBytes, pCtx->inputType, pDesc);
@@ -2916,7 +2916,7 @@ static void col_project_function(SQLFunctionCtx *pCtx) {
  INC_INIT_VAL(pCtx, pCtx->size);
  char *pData = GET_INPUT_CHAR(pCtx);
-  if (pCtx->order == TSQL_SO_ASC) {
+  if (pCtx->order == TSDB_ORDER_ASC) {
    memcpy(pCtx->aOutputBuf, pData, (size_t)pCtx->size * pCtx->inputBytes);
  } else {
    for(int32_t i = 0; i < pCtx->size; ++i) {
@@ -3011,7 +3011,7 @@ static void diff_function(SQLFunctionCtx *pCtx) {
  int32_t notNullElems = 0;
  int32_t step = GET_FORWARD_DIRECTION_FACTOR(pCtx->order);
-  int32_t i = (pCtx->order == TSQL_SO_ASC) ? 0 : pCtx->size - 1;
+  int32_t i = (pCtx->order == TSDB_ORDER_ASC) ? 0 : pCtx->size - 1;
  TSKEY * pTimestamp = pCtx->ptsOutputBuf;
@@ -3028,7 +3028,7 @@ static void diff_function(SQLFunctionCtx *pCtx) {
        if (pCtx->param[1].nType == INITIAL_VALUE_NOT_ASSIGNED) {  // initial value is not set yet
          pCtx->param[1].i64Key = pData[i];
          pCtx->param[1].nType = pCtx->inputType;
-        } else if ((i == 0 && pCtx->order == TSQL_SO_ASC) || (i == pCtx->size - 1 && pCtx->order == TSQL_SO_DESC)) {
+        } else if ((i == 0 && pCtx->order == TSDB_ORDER_ASC) || (i == pCtx->size - 1 && pCtx->order == TSDB_ORDER_DESC)) {
          *pOutput = pData[i] - pCtx->param[1].i64Key;
          *pTimestamp = pCtx->ptsList[i];
@@ -3060,7 +3060,7 @@ static void diff_function(SQLFunctionCtx *pCtx) {
        if (pCtx->param[1].nType == INITIAL_VALUE_NOT_ASSIGNED) {  // initial value is not set yet
          pCtx->param[1].i64Key = pData[i];
          pCtx->param[1].nType = pCtx->inputType;
-        } else if ((i == 0 && pCtx->order == TSQL_SO_ASC) || (i == pCtx->size - 1 && pCtx->order == TSQL_SO_DESC)) {
+        } else if ((i == 0 && pCtx->order == TSDB_ORDER_ASC) || (i == pCtx->size - 1 && pCtx->order == TSDB_ORDER_DESC)) {
          *pOutput = pData[i] - pCtx->param[1].i64Key;
          *pTimestamp = pCtx->ptsList[i];
@@ -3092,7 +3092,7 @@ static void diff_function(SQLFunctionCtx *pCtx) {
        if (pCtx->param[1].nType == INITIAL_VALUE_NOT_ASSIGNED) {  // initial value is not set yet
          pCtx->param[1].dKey = pData[i];
          pCtx->param[1].nType = pCtx->inputType;
-        } else if ((i == 0 && pCtx->order == TSQL_SO_ASC) || (i == pCtx->size - 1 && pCtx->order == TSQL_SO_DESC)) {
+        } else if ((i == 0 && pCtx->order == TSDB_ORDER_ASC) || (i == pCtx->size - 1 && pCtx->order == TSDB_ORDER_DESC)) {
          *pOutput = pData[i] - pCtx->param[1].dKey;
          *pTimestamp = pCtx->ptsList[i];
          pOutput += 1;
@@ -3122,7 +3122,7 @@ static void diff_function(SQLFunctionCtx *pCtx) {
        if (pCtx->param[1].nType == INITIAL_VALUE_NOT_ASSIGNED) {  // initial value is not set yet
          pCtx->param[1].dKey = pData[i];
          pCtx->param[1].nType = pCtx->inputType;
-        } else if ((i == 0 && pCtx->order == TSQL_SO_ASC) || (i == pCtx->size - 1 && pCtx->order == TSQL_SO_DESC)) {
+        } else if ((i == 0 && pCtx->order == TSDB_ORDER_ASC) || (i == pCtx->size - 1 && pCtx->order == TSDB_ORDER_DESC)) {
          *pOutput = pData[i] - pCtx->param[1].dKey;
          *pTimestamp = pCtx->ptsList[i];
@@ -3155,7 +3155,7 @@ static void diff_function(SQLFunctionCtx *pCtx) {
        if (pCtx->param[1].nType == INITIAL_VALUE_NOT_ASSIGNED) {  // initial value is not set yet
          pCtx->param[1].i64Key = pData[i];
          pCtx->param[1].nType = pCtx->inputType;
-        } else if ((i == 0 && pCtx->order == TSQL_SO_ASC) || (i == pCtx->size - 1 && pCtx->order == TSQL_SO_DESC)) {
+        } else if ((i == 0 && pCtx->order == TSDB_ORDER_ASC) || (i == pCtx->size - 1 && pCtx->order == TSDB_ORDER_DESC)) {
          *pOutput = pData[i] - pCtx->param[1].i64Key;
          *pTimestamp = pCtx->ptsList[i];
          pOutput += 1;
@@ -3186,7 +3186,7 @@ static void diff_function(SQLFunctionCtx *pCtx) {
        if (pCtx->param[1].nType == INITIAL_VALUE_NOT_ASSIGNED) {  // initial value is not set yet
          pCtx->param[1].i64Key = pData[i];
          pCtx->param[1].nType = pCtx->inputType;
-        } else if ((i == 0 && pCtx->order == TSQL_SO_ASC) || (i == pCtx->size - 1 && pCtx->order == TSQL_SO_DESC)) {
+        } else if ((i == 0 && pCtx->order == TSDB_ORDER_ASC) || (i == pCtx->size - 1 && pCtx->order == TSDB_ORDER_DESC)) {
          *pOutput = pData[i] - pCtx->param[1].i64Key;
          *pTimestamp = pCtx->ptsList[i];
@@ -3298,17 +3298,17 @@ char *arithmetic_callback_function(void *param, char *name, int32_t colId) {
  SArithmeticSupport *pSupport = (SArithmeticSupport *)param;
  SSqlFunctionExpr *pExpr = pSupport->pExpr;
-  int32_t           colIndexInBuf = -1;
+  int32_t           colIndex = -1;
  for (int32_t i = 0; i < pExpr->binExprInfo.numOfCols; ++i) {
    if (colId == pExpr->binExprInfo.pReqColumns[i].colId) {
-      colIndexInBuf = pExpr->binExprInfo.pReqColumns[i].colIdxInBuf;
+      colIndex = pExpr->binExprInfo.pReqColumns[i].colIndex;
      break;
    }
  }
-  assert(colIndexInBuf >= 0 && colId >= 0);
+  assert(colIndex >= 0 && colId >= 0);
-  return pSupport->data[colIndexInBuf] + pSupport->offset * pSupport->elemSize[colIndexInBuf];
+  return pSupport->data[colIndex] + pSupport->offset * pSupport->elemSize[colIndex];
 }
 static void arithmetic_function(SQLFunctionCtx *pCtx) {
@@ -4327,7 +4327,7 @@ static void ts_comp_function(SQLFunctionCtx *pCtx) {
  const char *input = GET_INPUT_CHAR(pCtx);
  // primary ts must be existed, so no need to check its existance
-  if (pCtx->order == TSQL_SO_ASC) {
+  if (pCtx->order == TSDB_ORDER_ASC) {
    tsBufAppend(pTSbuf, 0, pCtx->tag.i64Key, input, pCtx->size * TSDB_KEYSIZE);
  } else {
    for (int32_t i = pCtx->size - 1; i >= 0; --i) {

--- a/src/client/src/tscLocal.c
+++ b/src/client/src/tscLocal.c
@@ -240,7 +240,7 @@ static int32_t tscBuildMeterSchemaResultFields(SSqlObj *pSql, int32_t numOfCols,
  pCmd->numOfCols = numOfCols;
  SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(pCmd, 0);
-  pQueryInfo->order.order = TSQL_SO_ASC;
+  pQueryInfo->order.order = TSDB_ORDER_ASC;
  tscFieldInfoSetValue(&pQueryInfo->fieldsInfo, 0, TSDB_DATA_TYPE_BINARY, "Field", TSDB_COL_NAME_LEN);
  rowLen += TSDB_COL_NAME_LEN;
@@ -322,7 +322,7 @@ static int tscBuildMetricTagProjectionResult(SSqlObj *pSql) {
      STableIdInfo *pSidExt = tscGetMeterSidInfo(pSidList, j);
      for (int32_t k = 0; k < pQueryInfo->fieldsInfo.numOfOutputCols; ++k) {
-        SColIndexEx *pColIndex = &tscSqlExprGet(pQueryInfo, k)->colInfo;
+        SColIndex *pColIndex = &tscSqlExprGet(pQueryInfo, k)->colInfo;
        int16_t      offsetId = pColIndex->colIdx;
        assert((pColIndex->flag & TSDB_COL_TAG) != 0);
@@ -460,7 +460,7 @@ void tscSetLocalQueryResult(SSqlObj *pSql, const char *val, const char *columnNa
  pCmd->numOfCols = 1;
  SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
-  pQueryInfo->order.order = TSQL_SO_ASC;
+  pQueryInfo->order.order = TSDB_ORDER_ASC;
  tscClearFieldInfo(&pQueryInfo->fieldsInfo);

--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -45,7 +45,7 @@ typedef struct SColumnList {
  SColumnIndex ids[TSDB_MAX_COLUMNS];
 } SColumnList;
-static SSqlExpr* doAddProjectCol(SQueryInfo* pQueryInfo, int32_t outputIndex, int32_t colIdx, int32_t tableIndex);
+static SSqlExpr* doAddProjectCol(SQueryInfo* pQueryInfo, int32_t outputIndex, int32_t colIndex, int32_t tableIndex);
 static int32_t setShowInfo(SSqlObj* pSql, SSqlInfo* pInfo);
 static char*   getAccountId(SSqlObj* pSql);
@@ -61,7 +61,7 @@ static int32_t setObjFullName(char* fullName, const char* account, SSQLToken* pD
 static void getColumnName(tSQLExprItem* pItem, char* resultFieldName, int32_t nameLength);
 static void getRevisedName(char* resultFieldName, int32_t functionId, int32_t maxLen, char* columnName);
-static int32_t addExprAndResultField(SQueryInfo* pQueryInfo, int32_t colIdx, tSQLExprItem* pItem, bool finalResult);
+static int32_t addExprAndResultField(SQueryInfo* pQueryInfo, int32_t colIndex, tSQLExprItem* pItem, bool finalResult);
 static int32_t insertResultField(SQueryInfo* pQueryInfo, int32_t outputIndex, SColumnList* pIdList, int16_t bytes,
                                 int8_t type, char* fieldName, SSqlExpr* pSqlExpr);
 static int32_t changeFunctionID(int32_t optr, int16_t* functionId);
@@ -116,9 +116,7 @@ static int32_t doCheckForCreateTable(SSqlObj* pSql, int32_t subClauseIndex, SSql
 static int32_t doCheckForCreateFromStable(SSqlObj* pSql, SSqlInfo* pInfo);
 static int32_t doCheckForStream(SSqlObj* pSql, SSqlInfo* pInfo);
 static int32_t doCheckForQuery(SSqlObj* pSql, SQuerySQL* pQuerySql, int32_t index);
+static int32_t exprTreeFromSqlExpr(tExprNode **pExpr, tSQLExpr* pSqlExpr, SSqlExprInfo* pExprInfo, SQueryInfo* pQueryInfo, SArray* pCols);
-static int32_t convertSyntaxTreeToExprTree(tExprNode **pExpr, tSQLExpr* pAst, int32_t* num,
-    SColIndexEx** pColIndex, SSqlExprInfo* pExprInfo);
 /*
 * Used during parsing query sql. Since the query sql usually small in length, error position
@@ -136,7 +134,7 @@ static int32_t tscQueryOnlyMetricTags(SQueryInfo* pQueryInfo, bool* queryOnMetri
    SSqlExpr* pExpr = tscSqlExprGet(pQueryInfo, i);
    if (pExpr->functionId != TSDB_FUNC_TAGPRJ &&
-        !(pExpr->functionId == TSDB_FUNC_COUNT && pExpr->colInfo.colIdx == TSDB_TBNAME_COLUMN_INDEX)) {
+        !(pExpr->functionId == TSDB_FUNC_COUNT && pExpr->colInfo.colIndex == TSDB_TBNAME_COLUMN_INDEX)) {
      *queryOnMetricTags = false;
      break;
    }
@@ -1209,28 +1207,29 @@ int32_t parseSelectClause(SSqlCmd* pCmd, int32_t clauseIndex, tSQLExprList* pSel
          SSqlBinaryExprInfo* pBinExprInfo = &pFuncExpr->binExprInfo;
          tExprNode* pNode = NULL;
-          SColIndexEx* pColIndex = NULL;
+//          SArray* colList = taosArrayInit(10, sizeof(SColIndex));
-          int32_t ret = convertSyntaxTreeToExprTree(&pNode, pItem->pNode, &pBinExprInfo->numOfCols, &pColIndex, &pQueryInfo->exprsInfo);
+          int32_t ret = exprTreeFromSqlExpr(&pNode, pItem->pNode, &pQueryInfo->exprsInfo, pQueryInfo, NULL);
          if (ret != TSDB_CODE_SUCCESS) {
            tExprTreeDestroy(&pNode, NULL);
            return invalidSqlErrMsg(pQueryInfo->msg, "invalid expression in select clause");
          }
          pBinExprInfo->pBinExpr = pNode;
-          pBinExprInfo->pReqColumns = pColIndex;
+          assert(0);
+//          pBinExprInfo->pReqColumns = pColIndex;
          for(int32_t k = 0; k < pBinExprInfo->numOfCols; ++k) {
-            SColIndexEx* pCol = &pBinExprInfo->pReqColumns[k];
+            SColIndex* pCol = &pBinExprInfo->pReqColumns[k];
            for(int32_t f = 0; f < pQueryInfo->exprsInfo.numOfExprs; ++f) {
              SSqlExpr* pExpr = tscSqlExprGet(pQueryInfo, f);
              if (strcmp(pExpr->aliasName, pCol->name) == 0) {
-                pCol->colIdxInBuf = f;
+                pCol->colIndex = f;
                break;
              }
            }
-            assert(pCol->colIdxInBuf >= 0 && pCol->colIdxInBuf < pQueryInfo->exprsInfo.numOfExprs);
+            assert(pCol->colIndex >= 0 && pCol->colIndex < pQueryInfo->exprsInfo.numOfExprs);
            tfree(pNode);
          }
        }
@@ -1288,23 +1287,23 @@ int32_t insertResultField(SQueryInfo* pQueryInfo, int32_t outputIndex, SColumnLi
  return TSDB_CODE_SUCCESS;
 }
-SSqlExpr* doAddProjectCol(SQueryInfo* pQueryInfo, int32_t outputIndex, int32_t colIdx, int32_t tableIndex) {
+SSqlExpr* doAddProjectCol(SQueryInfo* pQueryInfo, int32_t outputIndex, int32_t colIndex, int32_t tableIndex) {
  STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, tableIndex);
  STableMeta*     pTableMeta = pTableMetaInfo->pTableMeta;
  int32_t numOfCols = tscGetNumOfColumns(pTableMeta);
-  SSchema* pSchema = tscGetTableColumnSchema(pTableMeta, colIdx);
+  SSchema* pSchema = tscGetTableColumnSchema(pTableMeta, colIndex);
-  int16_t functionId = (int16_t)((colIdx >= numOfCols) ? TSDB_FUNC_TAGPRJ : TSDB_FUNC_PRJ);
+  int16_t functionId = (int16_t)((colIndex >= numOfCols) ? TSDB_FUNC_TAGPRJ : TSDB_FUNC_PRJ);
  if (functionId == TSDB_FUNC_TAGPRJ) {
-//    addRequiredTagColumn(pQueryInfo, colIdx - numOfCols, tableIndex);
+//    addRequiredTagColumn(pQueryInfo, colIndex - numOfCols, tableIndex);
    pQueryInfo->type = TSDB_QUERY_TYPE_STABLE_QUERY;
  } else {
    pQueryInfo->type = TSDB_QUERY_TYPE_PROJECTION_QUERY;
  }
-  SColumnIndex index = {tableIndex, colIdx};
+  SColumnIndex index = {tableIndex, colIndex};
  SSqlExpr*    pExpr =
      tscSqlExprInsert(pQueryInfo, outputIndex, functionId, &index, pSchema->type, pSchema->bytes, pSchema->bytes);
@@ -1503,7 +1502,7 @@ static int32_t setExprInfoForFunctions(SQueryInfo* pQueryInfo, SSchema* pSchema,
  return TSDB_CODE_SUCCESS;
 }
-int32_t addExprAndResultField(SQueryInfo* pQueryInfo, int32_t colIdx, tSQLExprItem* pItem, bool finalResult) {
+int32_t addExprAndResultField(SQueryInfo* pQueryInfo, int32_t colIndex, tSQLExprItem* pItem, bool finalResult) {
  STableMetaInfo* pTableMetaInfo = NULL;
  int32_t         optr = pItem->pNode->nSQLOptr;
@@ -1547,7 +1546,7 @@ int32_t addExprAndResultField(SQueryInfo* pQueryInfo, int32_t colIdx, tSQLExprIt
          index = (SColumnIndex){0, PRIMARYKEY_TIMESTAMP_COL_INDEX};
          int32_t size = tDataTypeDesc[TSDB_DATA_TYPE_BIGINT].nSize;
-          pExpr = tscSqlExprInsert(pQueryInfo, colIdx, functionID, &index, TSDB_DATA_TYPE_BIGINT, size, size);
+          pExpr = tscSqlExprInsert(pQueryInfo, colIndex, functionID, &index, TSDB_DATA_TYPE_BIGINT, size, size);
        } else {
          // count the number of meters created according to the metric
          if (getColumnIndexByName(pToken, pQueryInfo, &index) != TSDB_CODE_SUCCESS) {
@@ -1562,13 +1561,13 @@ int32_t addExprAndResultField(SQueryInfo* pQueryInfo, int32_t colIdx, tSQLExprIt
          }
          int32_t size = tDataTypeDesc[TSDB_DATA_TYPE_BIGINT].nSize;
-          pExpr = tscSqlExprInsert(pQueryInfo, colIdx, functionID, &index, TSDB_DATA_TYPE_BIGINT, size, size);
+          pExpr = tscSqlExprInsert(pQueryInfo, colIndex, functionID, &index, TSDB_DATA_TYPE_BIGINT, size, size);
        }
      } else {  // count(*) is equalled to count(primary_timestamp_key)
        index = (SColumnIndex){0, PRIMARYKEY_TIMESTAMP_COL_INDEX};
        int32_t size = tDataTypeDesc[TSDB_DATA_TYPE_BIGINT].nSize;
-        pExpr = tscSqlExprInsert(pQueryInfo, colIdx, functionID, &index, TSDB_DATA_TYPE_BIGINT, size, size);
+        pExpr = tscSqlExprInsert(pQueryInfo, colIndex, functionID, &index, TSDB_DATA_TYPE_BIGINT, size, size);
      }
      memset(pExpr->aliasName, 0, tListLen(pExpr->aliasName));
@@ -1646,7 +1645,7 @@ int32_t addExprAndResultField(SQueryInfo* pQueryInfo, int32_t colIdx, tSQLExprIt
      // set the first column ts for diff query
      if (optr == TK_DIFF) {
-        colIdx += 1;
+        colIndex += 1;
        SColumnIndex indexTS = {.tableIndex = index.tableIndex, .columnIndex = 0};
        SSqlExpr* pExpr = tscSqlExprInsert(pQueryInfo, 0, TSDB_FUNC_TS_DUMMY, &indexTS, TSDB_DATA_TYPE_TIMESTAMP, TSDB_KEYSIZE,
                         TSDB_KEYSIZE);
@@ -1660,7 +1659,7 @@ int32_t addExprAndResultField(SQueryInfo* pQueryInfo, int32_t colIdx, tSQLExprIt
        return invalidSqlErrMsg(pQueryInfo->msg, msg6);
      }
-      SSqlExpr* pExpr = tscSqlExprInsert(pQueryInfo, colIdx, functionID, &index, resultType, resultSize, resultSize);
+      SSqlExpr* pExpr = tscSqlExprInsert(pQueryInfo, colIndex, functionID, &index, resultType, resultSize, resultSize);
      if (optr == TK_LEASTSQUARES) {
        /* set the leastsquares parameters */
@@ -1737,7 +1736,7 @@ int32_t addExprAndResultField(SQueryInfo* pQueryInfo, int32_t colIdx, tSQLExprIt
            for (int32_t j = 0; j < tscGetNumOfColumns(pTableMetaInfo->pTableMeta); ++j) {
              index.columnIndex = j;
-              if (setExprInfoForFunctions(pQueryInfo, pSchema, functionID, pItem->aliasName, colIdx++, &index) != 0) {
+              if (setExprInfoForFunctions(pQueryInfo, pSchema, functionID, pItem->aliasName, colIndex++, &index) != 0) {
                return TSDB_CODE_INVALID_SQL;
              }
            }
@@ -1755,7 +1754,7 @@ int32_t addExprAndResultField(SQueryInfo* pQueryInfo, int32_t colIdx, tSQLExprIt
              return invalidSqlErrMsg(pQueryInfo->msg, msg6);
            }
-            if (setExprInfoForFunctions(pQueryInfo, pSchema, functionID, pItem->aliasName, colIdx + i, &index) != 0) {
+            if (setExprInfoForFunctions(pQueryInfo, pSchema, functionID, pItem->aliasName, colIndex + i, &index) != 0) {
              return TSDB_CODE_INVALID_SQL;
            }
          }
@@ -1771,7 +1770,7 @@ int32_t addExprAndResultField(SQueryInfo* pQueryInfo, int32_t colIdx, tSQLExprIt
          for (int32_t i = 0; i < tscGetNumOfColumns(pTableMetaInfo->pTableMeta); ++i) {
            SColumnIndex index = {.tableIndex = j, .columnIndex = i};
-            if (setExprInfoForFunctions(pQueryInfo, pSchema, functionID, pItem->aliasName, colIdx + i + j, &index) !=
+            if (setExprInfoForFunctions(pQueryInfo, pSchema, functionID, pItem->aliasName, colIndex + i + j, &index) !=
                0) {
              return TSDB_CODE_INVALID_SQL;
            }
@@ -1852,7 +1851,7 @@ int32_t addExprAndResultField(SQueryInfo* pQueryInfo, int32_t colIdx, tSQLExprIt
          return TSDB_CODE_INVALID_SQL;
        }
-        pExpr = tscSqlExprInsert(pQueryInfo, colIdx, functionId, &index, resultType, resultSize, resultSize);
+        pExpr = tscSqlExprInsert(pQueryInfo, colIndex, functionId, &index, resultType, resultSize, resultSize);
        addExprParams(pExpr, val, TSDB_DATA_TYPE_DOUBLE, sizeof(double), 0);
      } else {
        tVariantDump(pVariant, val, TSDB_DATA_TYPE_BIGINT);
@@ -1876,9 +1875,9 @@ int32_t addExprAndResultField(SQueryInfo* pQueryInfo, int32_t colIdx, tSQLExprIt
        insertResultField(pQueryInfo, TS_COLUMN_INDEX, &ids, TSDB_KEYSIZE, TSDB_DATA_TYPE_TIMESTAMP,
                          aAggs[TSDB_FUNC_TS].aName, pExpr);
-        colIdx += 1;  // the first column is ts
+        colIndex += 1;  // the first column is ts
-        pExpr = tscSqlExprInsert(pQueryInfo, colIdx, functionId, &index, resultType, resultSize, resultSize);
+        pExpr = tscSqlExprInsert(pQueryInfo, colIndex, functionId, &index, resultType, resultSize, resultSize);
        addExprParams(pExpr, val, TSDB_DATA_TYPE_BIGINT, sizeof(int64_t), 0);
      }
@@ -1887,7 +1886,7 @@ int32_t addExprAndResultField(SQueryInfo* pQueryInfo, int32_t colIdx, tSQLExprIt
      SColumnList ids = getColumnList(1, 0, index.columnIndex);
      if (finalResult) {
-        insertResultField(pQueryInfo, colIdx, &ids, resultSize, resultType, pExpr->aliasName, pExpr);
+        insertResultField(pQueryInfo, colIndex, &ids, resultSize, resultType, pExpr->aliasName, pExpr);
      } else {
        for (int32_t i = 0; i < ids.num; ++i) {
          tscColumnBaseInfoInsert(pQueryInfo, &(ids.ids[i]));
@@ -2275,7 +2274,7 @@ int32_t tscTansformSQLFunctionForSTableQuery(SQueryInfo* pQueryInfo) {
    SSqlExpr*   pExpr = tscSqlExprGet(pQueryInfo, k);
    int16_t functionId = aAggs[pExpr->functionId].stableFuncId;
-    int32_t colIndex = pExpr->colInfo.colIdx;
+    int32_t colIndex = pExpr->colInfo.colIndex;
    SSchema* pSrcSchema = tscGetTableColumnSchema(pTableMetaInfo->pTableMeta, colIndex);
    if ((functionId >= TSDB_FUNC_SUM && functionId <= TSDB_FUNC_TWA) ||
@@ -2286,7 +2285,7 @@ int32_t tscTansformSQLFunctionForSTableQuery(SQueryInfo* pQueryInfo) {
        return TSDB_CODE_INVALID_SQL;
      }
-      tscSqlExprUpdate(pQueryInfo, k, functionId, pExpr->colInfo.colIdx, TSDB_DATA_TYPE_BINARY, bytes);
+      tscSqlExprUpdate(pQueryInfo, k, functionId, pExpr->colInfo.colIndex, TSDB_DATA_TYPE_BINARY, bytes);
      // todo refactor
      pExpr->interResBytes = intermediateBytes;
    }
@@ -2305,7 +2304,7 @@ void tscRestoreSQLFunctionForMetricQuery(SQueryInfo* pQueryInfo) {
  for (int32_t i = 0; i < pQueryInfo->exprsInfo.numOfExprs; ++i) {
    SSqlExpr*   pExpr = tscSqlExprGet(pQueryInfo, i);
-    SSchema* pSchema = tscGetTableColumnSchema(pTableMetaInfo->pTableMeta, pExpr->colInfo.colIdx);
+    SSchema* pSchema = tscGetTableColumnSchema(pTableMetaInfo->pTableMeta, pExpr->colInfo.colIndex);
 //    if (/*(pExpr->functionId >= TSDB_FUNC_FIRST_DST && pExpr->functionId <= TSDB_FUNC_LAST_DST) ||
 //        (pExpr->functionId >= TSDB_FUNC_SUM && pExpr->functionId <= TSDB_FUNC_MAX) ||
@@ -2352,7 +2351,7 @@ bool hasUnsupportFunctionsForSTableQuery(SQueryInfo* pQueryInfo) {
    }
    if (pQueryInfo->groupbyExpr.numOfGroupCols != 1 ||
-        pQueryInfo->groupbyExpr.columnInfo[0].colIdx != TSDB_TBNAME_COLUMN_INDEX) {
+        pQueryInfo->groupbyExpr.columnInfo[0].colIndex != TSDB_TBNAME_COLUMN_INDEX) {
      invalidSqlErrMsg(pQueryInfo->msg, msg2);
      return true;
    }
@@ -2403,12 +2402,12 @@ void updateTagColumnIndex(SQueryInfo* pQueryInfo, int32_t tableIndex) {
   */
  if (pQueryInfo->groupbyExpr.numOfGroupCols > 0 && pQueryInfo->groupbyExpr.tableIndex == tableIndex) {
    for (int32_t i = 0; i < pQueryInfo->groupbyExpr.numOfGroupCols; ++i) {
-      int32_t index = pQueryInfo->groupbyExpr.columnInfo[i].colIdx;
+      int32_t index = pQueryInfo->groupbyExpr.columnInfo[i].colIndex;
      for (int32_t j = 0; j < pTableMetaInfo->numOfTags; ++j) {
        int32_t tagColIndex = pTableMetaInfo->tagColumnIndex[j];
        if (tagColIndex == index) {
-          pQueryInfo->groupbyExpr.columnInfo[i].colIdx = j;
+          pQueryInfo->groupbyExpr.columnInfo[i].colIndex = j;
          break;
        }
      }
@@ -2429,8 +2428,8 @@ void updateTagColumnIndex(SQueryInfo* pQueryInfo, int32_t tableIndex) {
    }
    for (int32_t j = 0; j < pTableMetaInfo->numOfTags; ++j) {
-      if (pExpr->colInfo.colIdx == pTableMetaInfo->tagColumnIndex[j]) {
+      if (pExpr->colInfo.colIndex == pTableMetaInfo->tagColumnIndex[j]) {
-        pExpr->colInfo.colIdx = j;
+        pExpr->colInfo.colIndex = j;
        break;
      }
    }
@@ -2529,8 +2528,8 @@ int32_t parseGroupbyClause(SQueryInfo* pQueryInfo, tVariantList* pList, SSqlCmd*
      }
      pQueryInfo->groupbyExpr.columnInfo[i] =
-          (SColIndexEx){.colIdx = relIndex, .flag = TSDB_COL_TAG, .colId = pSchema->colId};  // relIndex;
+          (SColIndex){.colIndex = relIndex, .flag = TSDB_COL_TAG, .colId = pSchema->colId};  // relIndex;
-      addRequiredTagColumn(pQueryInfo, pQueryInfo->groupbyExpr.columnInfo[i].colIdx, index.tableIndex);
+      addRequiredTagColumn(pQueryInfo, pQueryInfo->groupbyExpr.columnInfo[i].colIndex, index.tableIndex);
    } else {
      // check if the column type is valid, here only support the bool/tinyint/smallint/bigint group by
      if (pSchema->type > TSDB_DATA_TYPE_BINARY) {
@@ -2539,8 +2538,8 @@ int32_t parseGroupbyClause(SQueryInfo* pQueryInfo, tVariantList* pList, SSqlCmd*
      tscColumnBaseInfoInsert(pQueryInfo, &index);
      pQueryInfo->groupbyExpr.columnInfo[i] =
-          (SColIndexEx){.colIdx = index.columnIndex, .flag = TSDB_COL_NORMAL, .colId = pSchema->colId};  // relIndex;
+          (SColIndex){.colIndex = index.columnIndex, .flag = TSDB_COL_NORMAL, .colId = pSchema->colId};  // relIndex;
-      pQueryInfo->groupbyExpr.orderType = TSQL_SO_ASC;
+      pQueryInfo->groupbyExpr.orderType = TSDB_ORDER_ASC;
      if (i == 0 && pList->nExpr > 1) {
        return invalidSqlErrMsg(pQueryInfo->msg, msg7);
@@ -2630,10 +2629,10 @@ static int32_t doExtractColumnFilterInfo(SQueryInfo* pQueryInfo, SColumnFilterIn
      pColumnFilter->upperRelOptr = TSDB_RELATION_LESS;
      break;
    case TK_GT:
-      pColumnFilter->lowerRelOptr = TSDB_RELATION_LARGE;
+      pColumnFilter->lowerRelOptr = TSDB_RELATION_GREATER;
      break;
    case TK_GE:
-      pColumnFilter->lowerRelOptr = TSDB_RELATION_LARGE_EQUAL;
+      pColumnFilter->lowerRelOptr = TSDB_RELATION_GREATER_EQUAL;
      break;
    case TK_EQ:
      pColumnFilter->lowerRelOptr = TSDB_RELATION_EQUAL;
@@ -2892,6 +2891,7 @@ static void relToString(tSQLExpr* pExpr, char** str) {
  }
 }
+UNUSED_FUNC
 static int32_t getTagCondString(tSQLExpr* pExpr, char** str) {
  if (pExpr == NULL) {
    return TSDB_CODE_SUCCESS;
@@ -3593,7 +3593,7 @@ static bool validateFilterExpr(SQueryInfo* pQueryInfo) {
      int32_t            lowerOptr = pColFilter->lowerRelOptr;
      int32_t            upperOptr = pColFilter->upperRelOptr;
-      if ((lowerOptr == TSDB_RELATION_LARGE_EQUAL || lowerOptr == TSDB_RELATION_LARGE) &&
+      if ((lowerOptr == TSDB_RELATION_GREATER_EQUAL || lowerOptr == TSDB_RELATION_GREATER) &&
          (upperOptr == TSDB_RELATION_LESS_EQUAL || upperOptr == TSDB_RELATION_LESS)) {
        continue;
      }
@@ -3727,28 +3727,27 @@ static void doAddJoinTagsColumnsIntoTagList(SQueryInfo* pQueryInfo, SCondExpr* p
 static int32_t getTagQueryCondExpr(SQueryInfo* pQueryInfo, SCondExpr* pCondExpr, tSQLExpr** pExpr) {
  int32_t ret = TSDB_CODE_SUCCESS;
-  if (pCondExpr->pTagCond != NULL) {
+  if (pCondExpr->pTagCond == NULL) {
+    return ret;
+  }
  for (int32_t i = 0; i < pQueryInfo->numOfTables; ++i) {
    tSQLExpr* p1 = extractExprForSTable(pExpr, pQueryInfo, i);
+    tExprNode* p = NULL;
-      STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, i);
+    ret = exprTreeFromSqlExpr(&p, p1, NULL, pQueryInfo, NULL);
+    SBuffer buf = exprTreeToBinary(p);
-      char  c[TSDB_MAX_TAGS_LEN] = {0};
-      char* str = c;
-      if ((ret = getTagCondString(p1, &str)) != TSDB_CODE_SUCCESS) {
-        return ret;
-      }
-      tsSetSTableQueryCond(&pQueryInfo->tagCond, pTableMetaInfo->pTableMeta->uid, c);
+    int64_t uid = tscGetMetaInfo(pQueryInfo, i)->pTableMeta->uid;
+    tsSetSTableQueryCond(&pQueryInfo->tagCond, uid, &buf);
    doCompactQueryExpr(pExpr);
    tSQLExprDestroy(p1);
+    tExprTreeDestroy(&p, NULL);
  }
  pCondExpr->pTagCond = NULL;
-  }
  return ret;
 }
 int32_t parseWhereClause(SQueryInfo* pQueryInfo, tSQLExpr** pExpr, SSqlObj* pSql) {
@@ -4044,11 +4043,11 @@ int32_t parseFillClause(SQueryInfo* pQueryInfo, SQuerySQL* pQuerySQL) {
 static void setDefaultOrderInfo(SQueryInfo* pQueryInfo) {
  /* set default timestamp order information for all queries */
-  pQueryInfo->order.order = TSQL_SO_ASC;
+  pQueryInfo->order.order = TSDB_ORDER_ASC;
  STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
  if (isTopBottomQuery(pQueryInfo)) {
-    pQueryInfo->order.order = TSQL_SO_ASC;
+    pQueryInfo->order.order = TSDB_ORDER_ASC;
    pQueryInfo->order.orderColId = PRIMARYKEY_TIMESTAMP_COL_INDEX;
  } else {
    pQueryInfo->order.orderColId = -1;
@@ -4056,7 +4055,7 @@ static void setDefaultOrderInfo(SQueryInfo* pQueryInfo) {
  /* for metric query, set default ascending order for group output */
  if (UTIL_TABLE_IS_SUPERTABLE(pTableMetaInfo)) {
-    pQueryInfo->groupbyExpr.orderType = TSQL_SO_ASC;
+    pQueryInfo->groupbyExpr.orderType = TSDB_ORDER_ASC;
  }
 }
@@ -4112,7 +4111,7 @@ int32_t parseOrderbyClause(SQueryInfo* pQueryInfo, SQuerySQL* pQuerySql, SSchema
    if (index.columnIndex >= tscGetNumOfColumns(pTableMetaInfo->pTableMeta)) {
      int32_t relTagIndex = index.columnIndex - tscGetNumOfColumns(pTableMetaInfo->pTableMeta);
-      if (relTagIndex == pQueryInfo->groupbyExpr.columnInfo[0].colIdx) {
+      if (relTagIndex == pQueryInfo->groupbyExpr.columnInfo[0].colIndex) {
        orderByTags = true;
      }
    } else if (index.columnIndex == TSDB_TBNAME_COLUMN_INDEX) {
@@ -4139,7 +4138,7 @@ int32_t parseOrderbyClause(SQueryInfo* pQueryInfo, SQuerySQL* pQuerySql, SSchema
        assert(pExpr->functionId == TSDB_FUNC_TS);
        pExpr = tscSqlExprGet(pQueryInfo, 1);
-        if (pExpr->colInfo.colIdx != index.columnIndex && index.columnIndex != PRIMARYKEY_TIMESTAMP_COL_INDEX) {
+        if (pExpr->colInfo.colIndex != index.columnIndex && index.columnIndex != PRIMARYKEY_TIMESTAMP_COL_INDEX) {
          return invalidSqlErrMsg(pQueryInfo->msg, msg2);
        }
@@ -4190,7 +4189,7 @@ int32_t parseOrderbyClause(SQueryInfo* pQueryInfo, SQuerySQL* pQuerySql, SSchema
      assert(pExpr->functionId == TSDB_FUNC_TS);
      pExpr = tscSqlExprGet(pQueryInfo, 1);
-      if (pExpr->colInfo.colIdx != index.columnIndex && index.columnIndex != PRIMARYKEY_TIMESTAMP_COL_INDEX) {
+      if (pExpr->colInfo.colIndex != index.columnIndex && index.columnIndex != PRIMARYKEY_TIMESTAMP_COL_INDEX) {
        return invalidSqlErrMsg(pQueryInfo->msg, msg2);
      }
@@ -4705,7 +4704,7 @@ int32_t parseLimitClause(SQueryInfo* pQueryInfo, int32_t clauseIndex, SQuerySQL*
    // filter the query functions operating on "tbname" column that are not supported by normal columns.
    for (int32_t i = 0; i < pQueryInfo->exprsInfo.numOfExprs; ++i) {
      SSqlExpr* pExpr = tscSqlExprGet(pQueryInfo, i);
-      if (pExpr->colInfo.colIdx == TSDB_TBNAME_COLUMN_INDEX) {
+      if (pExpr->colInfo.colIndex == TSDB_TBNAME_COLUMN_INDEX) {
        return invalidSqlErrMsg(pQueryInfo->msg, msg2);
      }
    }
@@ -4851,10 +4850,10 @@ void addGroupInfoForSubquery(SSqlObj* pParentObj, SSqlObj* pSql, int32_t subClau
      int32_t relIndex = index.columnIndex;
-      pExpr->colInfo.colIdx = relIndex;
+      pExpr->colInfo.colIndex = relIndex;
-      pQueryInfo->groupbyExpr.columnInfo[0].colIdx = relIndex;
+      pQueryInfo->groupbyExpr.columnInfo[0].colIndex = relIndex;
-      addRequiredTagColumn(pQueryInfo, pQueryInfo->groupbyExpr.columnInfo[0].colIdx, 0);
+      addRequiredTagColumn(pQueryInfo, pQueryInfo->groupbyExpr.columnInfo[0].colIndex, 0);
    }
  }
 }
@@ -4867,7 +4866,7 @@ static void doLimitOutputNormalColOfGroupby(SSqlExpr* pExpr) {
 }
 void doAddGroupColumnForSubquery(SQueryInfo* pQueryInfo, int32_t tagIndex) {
-  int32_t index = pQueryInfo->groupbyExpr.columnInfo[tagIndex].colIdx;
+  int32_t index = pQueryInfo->groupbyExpr.columnInfo[tagIndex].colIndex;
  STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
@@ -4909,7 +4908,7 @@ static void doUpdateSqlFunctionForTagPrj(SQueryInfo* pQueryInfo) {
  for (int32_t i = 0; i < pQueryInfo->exprsInfo.numOfExprs; ++i) {
    SSqlExpr* pExpr = tscSqlExprGet(pQueryInfo, i);
    if (pExpr->functionId != TSDB_FUNC_TAG_DUMMY && pExpr->functionId != TSDB_FUNC_TS_DUMMY) {
-      SSchema* pColSchema = &pSchema[pExpr->colInfo.colIdx];
+      SSchema* pColSchema = &pSchema[pExpr->colInfo.colIndex];
      getResultDataInfo(pColSchema->type, pColSchema->bytes, pExpr->functionId, pExpr->param[0].i64Key, &pExpr->resType,
                        &pExpr->resBytes, &pExpr->interResBytes, tagLength, true);
    }
@@ -5087,16 +5086,16 @@ static int32_t doAddGroupbyColumnsOnDemand(SQueryInfo* pQueryInfo) {
  char*    name = NULL;
  for (int32_t i = 0; i < pQueryInfo->groupbyExpr.numOfGroupCols; ++i) {
-    SColIndexEx* pColIndex = &pQueryInfo->groupbyExpr.columnInfo[i];
+    SColIndex* pColIndex = &pQueryInfo->groupbyExpr.columnInfo[i];
-    int16_t colIndex = pColIndex->colIdx;
+    int16_t colIndex = pColIndex->colIndex;
-    if (pColIndex->colIdx == TSDB_TBNAME_COLUMN_INDEX) {
+    if (pColIndex->colIndex == TSDB_TBNAME_COLUMN_INDEX) {
      type = TSDB_DATA_TYPE_BINARY;
      bytes = TSDB_TABLE_NAME_LEN;
      name = TSQL_TBNAME_L;
    } else {
-      colIndex = (TSDB_COL_IS_TAG(pColIndex->flag)) ? tscGetNumOfColumns(pTableMetaInfo->pTableMeta) + pColIndex->colIdx
+      colIndex = (TSDB_COL_IS_TAG(pColIndex->flag)) ? tscGetNumOfColumns(pTableMetaInfo->pTableMeta) + pColIndex->colIndex
-                                                    : pColIndex->colIdx;
+                                                    : pColIndex->colIndex;
      type = pSchema[colIndex].type;
      bytes = pSchema[colIndex].bytes;
@@ -5175,7 +5174,7 @@ int32_t doFunctionsCompatibleCheck(SSqlCmd* pCmd, SQueryInfo* pQueryInfo) {
      if (functId == TSDB_FUNC_PRJ && pExpr->colInfo.colId != PRIMARYKEY_TIMESTAMP_COL_INDEX) {
        bool qualified = false;
        for (int32_t j = 0; j < pQueryInfo->groupbyExpr.numOfGroupCols; ++j) {
-          SColIndexEx* pColIndex = &pQueryInfo->groupbyExpr.columnInfo[j];
+          SColIndex* pColIndex = &pQueryInfo->groupbyExpr.columnInfo[j];
          if (pColIndex->colId == pExpr->colInfo.colId) {
            qualified = true;
            break;
@@ -5192,7 +5191,7 @@ int32_t doFunctionsCompatibleCheck(SSqlCmd* pCmd, SQueryInfo* pQueryInfo) {
        return invalidSqlErrMsg(pQueryInfo->msg, msg1);
      }
-      if (functId == TSDB_FUNC_COUNT && pExpr->colInfo.colIdx == TSDB_TBNAME_COLUMN_INDEX) {
+      if (functId == TSDB_FUNC_COUNT && pExpr->colInfo.colIndex == TSDB_TBNAME_COLUMN_INDEX) {
        return invalidSqlErrMsg(pQueryInfo->msg, msg1);
      }
    }
@@ -5807,36 +5806,37 @@ int32_t doCheckForQuery(SSqlObj* pSql, SQuerySQL* pQuerySql, int32_t index) {
  return TSDB_CODE_SUCCESS;  // Does not build query message here
 }
-static int32_t convertSyntaxTreeToExprTree(tExprNode **pExpr, tSQLExpr* pAst, int32_t* num,
+int32_t exprTreeFromSqlExpr(tExprNode **pExpr, tSQLExpr* pSqlExpr, SSqlExprInfo* pExprInfo, SQueryInfo* pQueryInfo, SArray* pCols) {
-    SColIndexEx** pColIndex, SSqlExprInfo* pExprInfo) {
  tExprNode* pLeft = NULL;
  tExprNode* pRight= NULL;
-  if (pAst->pLeft != NULL) {
+  if (pSqlExpr->pLeft != NULL) {
-    int32_t ret = convertSyntaxTreeToExprTree(&pLeft, pAst->pLeft, num, pColIndex, pExprInfo);
+    int32_t ret = exprTreeFromSqlExpr(&pLeft, pSqlExpr->pLeft, pExprInfo, pQueryInfo, pCols);
    if (ret != TSDB_CODE_SUCCESS) {
      return ret;
    }
  }
-  if (pAst->pRight != NULL) {
+  if (pSqlExpr->pRight != NULL) {
-    int32_t ret = convertSyntaxTreeToExprTree(&pRight, pAst->pRight, num, pColIndex, pExprInfo);
+    int32_t ret = exprTreeFromSqlExpr(&pRight, pSqlExpr->pRight, pExprInfo, pQueryInfo, pCols);
    if (ret != TSDB_CODE_SUCCESS) {
      return ret;
    }
  }
-  if (pAst->pLeft == NULL) {
+  if (pSqlExpr->pLeft == NULL) {
-    if (pAst->nSQLOptr >= TK_TINYINT && pAst->nSQLOptr <= TK_DOUBLE) {
+    if (pSqlExpr->nSQLOptr >= TK_TINYINT && pSqlExpr->nSQLOptr <= TK_DOUBLE) {
-      *pExpr = calloc(1, sizeof(tExprNode) + sizeof(tVariant));
+      *pExpr = calloc(1, sizeof(tExprNode));
      (*pExpr)->nodeType = TSQL_NODE_VALUE;
-      (*pExpr)->pVal = (tVariant*) ((char*)(*pExpr) + sizeof(tExprNode));
+      (*pExpr)->pVal = calloc(1, sizeof(tVariant));
-      tVariantAssign((*pExpr)->pVal, &pAst->val);
-    } else if (pAst->nSQLOptr >= TK_COUNT && pAst->nSQLOptr <= TK_AVG_IRATE) {
+      tVariantAssign((*pExpr)->pVal, &pSqlExpr->val);
-      *pExpr = calloc(1, sizeof(tExprNode) + sizeof(SSchemaEx));
+    } else if (pSqlExpr->nSQLOptr >= TK_COUNT && pSqlExpr->nSQLOptr <= TK_AVG_IRATE) {
+      *pExpr = calloc(1, sizeof(tExprNode));
      (*pExpr)->nodeType = TSQL_NODE_COL;
-      (*pExpr)->pSchema = (SSchema*)((char*)(*pExpr) + sizeof(tExprNode));
+      (*pExpr)->pSchema = calloc(1, sizeof(SSchema));
-      strncpy((*pExpr)->pSchema->name, pAst->operand.z, pAst->operand.n);
+      strncpy((*pExpr)->pSchema->name, pSqlExpr->operand.z, pSqlExpr->operand.n);
      // set the input column data byte and type.
      for (int32_t i = 0; i < pExprInfo->numOfExprs; ++i) {
@@ -5846,20 +5846,41 @@ static int32_t convertSyntaxTreeToExprTree(tExprNode **pExpr, tSQLExpr* pAst, in
          break;
        }
      }
-    } else { //todo return error
+    } else if (pSqlExpr->nSQLOptr == TK_ID) { // column name
+      SColumnIndex index = {0};
+      int32_t ret = getColumnIndexByName(&pSqlExpr->colInfo, pQueryInfo, &index);
+      if (ret != TSDB_CODE_SUCCESS) {
+        return ret;
+      }
+      *pExpr = calloc(1, sizeof(tExprNode));
+      (*pExpr)->nodeType = TSQL_NODE_COL;
+      (*pExpr)->pSchema = calloc(1, sizeof(SSchema));
+      STableMeta* pTableMeta = tscGetMetaInfo(pQueryInfo, 0)->pTableMeta;
+      SSchema* pSchema = tscGetTableColumnSchema(pTableMeta, index.columnIndex);
+      *(*pExpr)->pSchema = *pSchema;
      return TSDB_CODE_SUCCESS;
+    } else {
+      return TSDB_CODE_INVALID_SQL;
    }
-    *pColIndex = realloc(*pColIndex, (++(*num)) * sizeof(SColIndexEx));
+    if (pCols != NULL) {  // record the involved columns
-    memset(&(*pColIndex)[(*num) - 1], 0, sizeof(SColIndexEx));
+      SColIndex colIndex = {0};
+      strncpy(colIndex.name, pSqlExpr->operand.z, pSqlExpr->operand.n);
+      taosArrayPush(pCols, &colIndex);
+    }
-    strncpy((*pColIndex)[(*num) - 1].name, pAst->operand.z, pAst->operand.n);
  } else {
    *pExpr = (tExprNode *)calloc(1, sizeof(tExprNode));
+    (*pExpr)->nodeType = TSQL_NODE_EXPR;
    (*pExpr)->_node.hasPK = false;
    (*pExpr)->_node.pLeft = pLeft;
    (*pExpr)->_node.pRight = pRight;
-    SSQLToken t = {.type = pAst->nSQLOptr};
+    SSQLToken t = {.type = pSqlExpr->nSQLOptr};
    (*pExpr)->_node.optr = getBinaryExprOptr(&t);
    assert((*pExpr)->_node.optr != 0);

--- a/src/client/src/tscSecondaryMerge.c
+++ b/src/client/src/tscSecondaryMerge.c
@@ -45,7 +45,7 @@ int32_t treeComparator(const void *pLeft, const void *pRight, void *param) {
    return -1;
  }
-  if (pParam->groupOrderType == TSQL_SO_DESC) {  // desc
+  if (pParam->groupOrderType == TSDB_ORDER_DESC) {  // desc
    return compare_d(pDesc, pParam->numOfElems, pLocalData[pLeftIdx]->rowIdx, pLocalData[pLeftIdx]->filePage.data,
                     pParam->numOfElems, pLocalData[pRightIdx]->rowIdx, pLocalData[pRightIdx]->filePage.data);
  } else {
@@ -652,7 +652,7 @@ int32_t tscLocalReducerEnvCreate(SSqlObj *pSql, tExtMemBuffer ***pMemBuffer, tOr
  for (int32_t i = 0; i < pQueryInfo->exprsInfo.numOfExprs; ++i) {
    SSqlExpr *pExpr = tscSqlExprGet(pQueryInfo, i);
-    SSchema *p1 = tscGetTableColumnSchema(pTableMetaInfo->pTableMeta, pExpr->colInfo.colIdx);
+    SSchema *p1 = tscGetTableColumnSchema(pTableMetaInfo->pTableMeta, pExpr->colInfo.colIndex);
    int16_t inter = 0;
    int16_t type = -1;
@@ -990,7 +990,7 @@ static void doInterpolateResult(SSqlObj *pSql, SLocalReducer *pLocalReducer, boo
      savePrevRecordAndSetupInterpoInfo(pLocalReducer, pQueryInfo, pInterpoInfo);
    }
-    if (pQueryInfo->order.order == TSQL_SO_ASC) {
+    if (pQueryInfo->order.order == TSDB_ORDER_ASC) {
      for (int32_t i = 0; i < pQueryInfo->fieldsInfo.numOfOutputCols; ++i) {
        TAOS_FIELD *pField = tscFieldInfoGetField(pQueryInfo, i);
        int16_t     offset = getColumnModelOffset(pLocalReducer->resColModel, i);
@@ -1168,7 +1168,7 @@ bool needToMerge(SQueryInfo *pQueryInfo, SLocalReducer *pLocalReducer, tFilePage
  } else {
    tOrderDescriptor *pDesc = pLocalReducer->pDesc;
    if (pDesc->orderIdx.numOfCols > 0) {
-      if (pDesc->tsOrder == TSQL_SO_ASC) {  // asc
+      if (pDesc->tsOrder == TSDB_ORDER_ASC) {  // asc
        // todo refactor comparator
        ret = compare_a(pLocalReducer->pDesc, 1, 0, pLocalReducer->prevRowOfInput, 1, 0, tmpBuffer->data);
      } else {  // desc

--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -37,12 +37,25 @@ int (*tscBuildMsg[TSDB_SQL_MAX])(SSqlObj *pSql, SSqlInfo *pInfo) = {0};
 int (*tscProcessMsgRsp[TSDB_SQL_MAX])(SSqlObj *pSql);
 void tscProcessActivityTimer(void *handle, void *tmrId);
 int tscKeepConn[TSDB_SQL_MAX] = {0};
 TSKEY tscGetSubscriptionProgress(void* sub, int64_t uid);
 void tscUpdateSubscriptionProgress(void* sub, int64_t uid, TSKEY ts);
 void tscSaveSubscriptionProgress(void* sub);
 static int32_t minMsgSize() { return tsRpcHeadSize + 100; }
+static void tscSetDnodeIpList(SSqlObj* pSql, STableMeta* pTableMeta) {
+  SRpcIpSet* pIpList = &pSql->ipList;
+  pIpList->numOfIps = pTableMeta->numOfVpeers;
+  pIpList->port     = tsDnodeShellPort;
+  pIpList->inUse    = 0;
+  for(int32_t i = 0; i < pTableMeta->numOfVpeers; ++i) {
+    pIpList->ip[i] = pTableMeta->vpeerDesc[i].ip;
+  }
+}
 void tscPrintMgmtIp() {
  if (tscMgmtIpList.numOfIps <= 0) {
    tscError("invalid mgmt IP list:%d", tscMgmtIpList.numOfIps);
@@ -178,17 +191,6 @@ int tscSendMsgToServer(SSqlObj *pSql) {
  }
  if (pSql->cmd.command < TSDB_SQL_MGMT) {
-    STableMetaInfo *pTableMetaInfo = tscGetTableMetaInfoFromCmd(pCmd, pCmd->clauseIndex, 0);
-    STableMeta* pTableMeta = pTableMetaInfo->pTableMeta;
-    pSql->ipList.numOfIps = pTableMeta->numOfVpeers;
-    pSql->ipList.port     = tsDnodeShellPort;
-    pSql->ipList.inUse    = 0;
-    for(int32_t i = 0; i < pTableMeta->numOfVpeers; ++i) {
-      pSql->ipList.ip[i] = pTableMeta->vpeerDesc[i].ip;
-    }
    tscPrint("%p msg:%s is sent to server %d", pSql, taosMsg[pSql->cmd.msgType], pSql->ipList.port);
    memcpy(pMsg, pSql->cmd.payload + tsRpcHeadSize, pSql->cmd.payloadLen);
@@ -266,19 +268,18 @@ void tscProcessMsgFromServer(SRpcMsg *rpcMsg) {
        rpcFreeCont(rpcMsg->pCont);
        return;
      } else {
-        tscTrace("%p it shall renew table meta, code:%d", pSql, tstrerror(rpcMsg->code));
+        tscWarn("%p it shall renew table meta, code:%s, retry:%d", pSql, tstrerror(rpcMsg->code), ++pSql->retry);
-        pSql->maxRetry = TSDB_VNODES_SUPPORT * 2;
+        pSql->maxRetry = TSDB_VNODES_SUPPORT * 2;  // todo move away
        pSql->res.code = rpcMsg->code;  // keep the previous error code
-        if (++pSql->retry > pSql->maxRetry) {
+        if (pSql->retry > pSql->maxRetry) {
-          tscError("%p max retry %d reached, ", pSql, pSql->retry);
+          tscError("%p max retry %d reached, give up", pSql, pSql->maxRetry);
-          return;
+        } else {
-        }
          rpcMsg->code = tscRenewMeterMeta(pSql, pTableMetaInfo->name);
          if (pTableMetaInfo->pTableMeta) {
            tscSendMsgToServer(pSql);
+          }
          rpcFreeCont(rpcMsg->pCont);
          return;
        }
@@ -286,7 +287,11 @@ void tscProcessMsgFromServer(SRpcMsg *rpcMsg) {
    }
  }
+  if (pRes->code == TSDB_CODE_SUCCESS) {
+    tscTrace("%p reset retry counter to be 0 due to success rsp, old:%d", pSql, pSql->retry);
    pSql->retry = 0;
+  }
  pRes->rspLen = 0;
  if (pRes->code != TSDB_CODE_QUERY_CANCELLED) {
@@ -331,7 +336,7 @@ void tscProcessMsgFromServer(SRpcMsg *rpcMsg) {
      pMsg->numOfFailedBlocks = htonl(pMsg->numOfFailedBlocks);
      pRes->numOfRows += pMsg->affectedRows;
-      tscTrace("%p cmd:%d code:%d, inserted rows:%d, rsp len:%d", pSql, pCmd->command, pRes->code,
+      tscTrace("%p cmd:%d code:%s, inserted rows:%d, rsp len:%d", pSql, pCmd->command, tstrerror(pRes->code),
          pMsg->affectedRows, pRes->rspLen);
    } else {
      tscTrace("%p cmd:%d code:%s rsp len:%d", pSql, pCmd->command, tstrerror(pRes->code), pRes->rspLen);
@@ -550,8 +555,9 @@ int tscBuildSubmitMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
  // pSql->cmd.payloadLen is set during copying data into payload
  pSql->cmd.msgType = TSDB_MSG_TYPE_SUBMIT;
-  tscTrace("%p build submit msg, vgId:%d numOfVnodes:%d", pSql, pTableMeta->vgId, htonl(pMsgDesc->numOfVnodes));
+  tscSetDnodeIpList(pSql, pTableMeta);
+  tscTrace("%p build submit msg, vgId:%d numOfVnodes:%d", pSql, pTableMeta->vgId, htonl(pMsgDesc->numOfVnodes));
  return TSDB_CODE_SUCCESS;
 }
@@ -644,15 +650,22 @@ int tscBuildQueryMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
  if (UTIL_TABLE_IS_NOMRAL_TABLE(pTableMetaInfo)) {
    numOfTables = 1;
+    tscSetDnodeIpList(pSql, pTableMeta);
    pQueryMsg->head.vgId = htonl(pTableMeta->vgId);
    tscTrace("%p queried tables:%d, table id: %s", pSql, 1, pTableMetaInfo->name);
-  } else {  // query on super table
+  } else {  // query super table
    if (pTableMetaInfo->vnodeIndex < 0) {
      tscError("%p error vnodeIdx:%d", pSql, pTableMetaInfo->vnodeIndex);
      return -1;
    }
-    uint32_t vnodeId = 1;
+    pSql->ipList.numOfIps = taosArrayGetSize(pTableMetaInfo->vgroupIdList);
+    pSql->ipList.port     = tsDnodeShellPort;
+    pSql->ipList.inUse    = 0;
+    for(int32_t i = 0; i < pSql->ipList.numOfIps; ++i) {
+      pSql->ipList.ip[i] = *(uint32_t*) taosArrayGet(pTableMetaInfo->vgroupIdList, i);
+    }
 #if 0
    SVnodeSidList *pVnodeSidList = tscGetVnodeSidList(pMetricMeta, pTableMetaInfo->vnodeIndex);
@@ -665,12 +678,13 @@ int tscBuildQueryMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
    }
 #endif
+    uint32_t vnodeId = 1;
    tscTrace("%p query on vid:%d, number of tables:%d", pSql, vnodeId, numOfTables);
    pQueryMsg->head.vgId = htonl(vnodeId);
    numOfTables = 1;
  }
-  if (pQueryInfo->order.order == TSQL_SO_ASC) {
+  if (pQueryInfo->order.order == TSDB_ORDER_ASC) {
    pQueryMsg->window.skey = htobe64(pQueryInfo->stime);
    pQueryMsg->window.ekey = htobe64(pQueryInfo->etime);
  } else {
@@ -760,13 +774,13 @@ int tscBuildQueryMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
    }
    if (!tscValidateColumnId(pTableMetaInfo, pExpr->colInfo.colId)) {
-      /* column id is not valid according to the cached metermeta, the meter meta is expired */
+      /* column id is not valid according to the cached metermeta, the table meta is expired */
      tscError("%p table schema is not matched with parsed sql", pSql);
      return -1;
    }
    pSqlFuncExpr->colInfo.colId    = htons(pExpr->colInfo.colId);
-    pSqlFuncExpr->colInfo.colIdx = htons(pExpr->colInfo.colIdx);
+    pSqlFuncExpr->colInfo.colIndex = htons(pExpr->colInfo.colIndex);
    pSqlFuncExpr->colInfo.flag     = htons(pExpr->colInfo.flag);
    pSqlFuncExpr->functionId  = htons(pExpr->functionId);
@@ -815,16 +829,13 @@ int tscBuildQueryMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
    pQueryMsg->orderType = htons(pGroupbyExpr->orderType);
    for (int32_t j = 0; j < pGroupbyExpr->numOfGroupCols; ++j) {
-      SColIndexEx *pCol = &pGroupbyExpr->columnInfo[j];
+      SColIndex *pCol = &pGroupbyExpr->columnInfo[j];
      *((int16_t *)pMsg) = pCol->colId;
      pMsg += sizeof(pCol->colId);
-      *((int16_t *)pMsg) += pCol->colIdx;
+      *((int16_t *)pMsg) += pCol->colIndex;
-      pMsg += sizeof(pCol->colIdx);
+      pMsg += sizeof(pCol->colIndex);
-      *((int16_t *)pMsg) += pCol->colIdxInBuf;
-      pMsg += sizeof(pCol->colIdxInBuf);
      *((int16_t *)pMsg) += pCol->flag;
      pMsg += sizeof(pCol->flag);
@@ -866,34 +877,19 @@ int tscBuildQueryMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
  }
  // serialize tag column query condition
-  if (pQueryInfo->tagCond.numOfTagCond > 0) {
+  if (pQueryInfo->tagCond.pCond != NULL && taosArrayGetSize(pQueryInfo->tagCond.pCond) > 0) {
    STagCond* pTagCond = &pQueryInfo->tagCond;
-    SCond *pCond = tsGetSTableQueryCondPos(pTagCond, pTableMeta->uid);
+    SCond *pCond = tsGetSTableQueryCond(pTagCond, pTableMeta->uid);
    if (pCond != NULL && pCond->cond != NULL) {
-      size_t condLen = strlen(pCond->cond) + 1;
+      pQueryMsg->tagCondLen = htons(pCond->len);
+      memcpy(pMsg, pCond->cond, pCond->len);
-      bool ret = taosMbsToUcs4(pCond->cond, condLen, pMsg, condLen * TSDB_NCHAR_SIZE);
-      if (!ret) {
-        tscError("%p mbs to ucs4 failed:%d", pSql, tsGetSTableQueryCondPos(pTagCond, pTableMeta->uid));
-        return 0;
-      }
-      pQueryMsg->tagCondLen = htons(condLen);
+      pMsg += pCond->len;
-      pMsg += condLen * TSDB_NCHAR_SIZE;
    }
  }
  // tbname in/like query expression should be sent to mgmt node
-  STagCond* pTagCond = &pQueryInfo->tagCond;
-  if (pTagCond->tbnameCond.cond != NULL) {
-    size_t s = strlen(pTagCond->tbnameCond.cond);
-    memcpy(pMsg, pTagCond->tbnameCond.cond, s);
-    pQueryMsg->nameCondLen = htons(s);
-    pMsg += s;
-  }
  msgLen = pMsg - pStart;
  tscTrace("%p msg built success,len:%d bytes", pSql, msgLen);
@@ -1546,7 +1542,7 @@ int tscBuildTableMetaMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
 }
 /**
- *  multi meter meta req pkg format:
+ *  multi table meta req pkg format:
 *  | SMgmtHead | SCMMultiTableInfoMsg | tableId0 | tableId1 | tableId2 | ......
 *      no used         4B
 **/
@@ -1591,8 +1587,10 @@ static UNUSED_FUNC int32_t tscEstimateMetricMetaMsgSize(SSqlCmd *pCmd) {
  SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(pCmd, 0);
  int32_t n = 0;
-  for (int32_t i = 0; i < pQueryInfo->tagCond.numOfTagCond; ++i) {
+  size_t size = taosArrayGetSize(pQueryInfo->tagCond.pCond);
-    n += strlen(pQueryInfo->tagCond.cond[i].cond);
+  for (int32_t i = 0; i < size; ++i) {
+    assert(0);
+//    n += strlen(pQueryInfo->tagCond.cond[i].cond);
  }
  int32_t tagLen = n * TSDB_NCHAR_SIZE;
@@ -1603,7 +1601,7 @@ static UNUSED_FUNC int32_t tscEstimateMetricMetaMsgSize(SSqlCmd *pCmd) {
  int32_t joinCondLen = (TSDB_TABLE_ID_LEN + sizeof(int16_t)) * 2;
  int32_t elemSize = sizeof(SSuperTableMetaElemMsg) * pQueryInfo->numOfTables;
-  int32_t colSize = pQueryInfo->groupbyExpr.numOfGroupCols*sizeof(SColIndexEx);
+  int32_t colSize = pQueryInfo->groupbyExpr.numOfGroupCols*sizeof(SColIndex);
  int32_t len = tagLen + joinCondLen + elemSize + colSize + defaultSize;
@@ -1675,13 +1673,13 @@ int tscBuildSTableVgroupMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
    // convert to unicode before sending to mnode for metric query
    int32_t condLen = 0;
    if (pTagCond->numOfTagCond > 0) {
-      SCond *pCond = tsGetSTableQueryCondPos(pTagCond, uid);
+      SCond *pCond = tsGetSTableQueryCond(pTagCond, uid);
      if (pCond != NULL && pCond->cond != NULL) {
        condLen = strlen(pCond->cond) + 1;
        bool ret = taosMbsToUcs4(pCond->cond, condLen, pMsg, condLen * TSDB_NCHAR_SIZE);
        if (!ret) {
-          tscError("%p mbs to ucs4 failed:%s", pSql, tsGetSTableQueryCondPos(pTagCond, uid));
+          tscError("%p mbs to ucs4 failed:%s", pSql, tsGetSTableQueryCond(pTagCond, uid));
          return 0;
        }
      }
@@ -1728,16 +1726,16 @@ int tscBuildSTableVgroupMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
        pElem->groupbyTagColumnList = htonl(offset);
        for (int32_t j = 0; j < pQueryInfo->groupbyExpr.numOfGroupCols; ++j) {
-          SColIndexEx *pCol = &pQueryInfo->groupbyExpr.columnInfo[j];
+          SColIndex *pCol = &pQueryInfo->groupbyExpr.columnInfo[j];
-          SColIndexEx *pDestCol = (SColIndexEx *)pMsg;
+          SColIndex *pDestCol = (SColIndex *)pMsg;
          pDestCol->colIdxInBuf = 0;
-          pDestCol->colIdx = htons(pCol->colIdx);
+          pDestCol->colIndex = htons(pCol->colIndex);
          pDestCol->colId = htons(pDestCol->colId);
          pDestCol->flag = htons(pDestCol->flag);
          strncpy(pDestCol->name, pCol->name, tListLen(pCol->name));
-          pMsg += sizeof(SColIndexEx);
+          pMsg += sizeof(SColIndex);
        }
      }
    }
@@ -1897,7 +1895,7 @@ int tscProcessTableMetaRsp(SSqlObj *pSql) {
 }
 /**
- *  multi meter meta rsp pkg format:
+ *  multi table meta rsp pkg format:
 *  | STaosRsp | ieType | SCMMultiTableInfoMsg | SMeterMeta0 | SSchema0 | SMeterMeta1 | SSchema1 | SMeterMeta2 | SSchema2
 *  |...... 1B        1B            4B
 **/
@@ -2129,7 +2127,8 @@ _error_clean:
  // todo opt performance
  for(int32_t i = 0; i < pStableVgroup->numOfDnodes; ++i) {
-    taosArrayPush(pInfo->vgroupIdList, &pStableVgroup->dnodeIps[i]);
+    int32_t ip = htonl(pStableVgroup->dnodeIps[i]);
+    taosArrayPush(pInfo->vgroupIdList, &ip);
  }
  return pSql->res.code;
@@ -2367,7 +2366,7 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code);
 static int32_t getTableMetaFromMgmt(SSqlObj *pSql, STableMetaInfo *pTableMetaInfo) {
  SSqlObj *pNew = calloc(1, sizeof(SSqlObj));
  if (NULL == pNew) {
-    tscError("%p malloc failed for new sqlobj to get meter meta", pSql);
+    tscError("%p malloc failed for new sqlobj to get table meta", pSql);
    return TSDB_CODE_CLI_OUT_OF_MEMORY;
  }
@@ -2382,7 +2381,7 @@ static int32_t getTableMetaFromMgmt(SSqlObj *pSql, STableMetaInfo *pTableMetaInf
  pNew->cmd.autoCreated = pSql->cmd.autoCreated;  // create table if not exists
  if (TSDB_CODE_SUCCESS != tscAllocPayload(&pNew->cmd, TSDB_DEFAULT_PAYLOAD_SIZE)) {
-    tscError("%p malloc failed for payload to get meter meta", pSql);
+    tscError("%p malloc failed for payload to get table meta", pSql);
    free(pNew);
    return TSDB_CODE_CLI_OUT_OF_MEMORY;
@@ -2464,9 +2463,10 @@ int tscRenewMeterMeta(SSqlObj *pSql, char *tableId) {
   * 2. if get metermeta failed, still get the metermeta
   */
  if (pTableMetaInfo->pTableMeta == NULL || !tscQueryOnMetric(pCmd)) {
+    STableMeta* pTableMeta = pTableMetaInfo->pTableMeta;
    if (pTableMetaInfo->pTableMeta) {
-      tscTrace("%p update meter meta, old: numOfTags:%d, numOfCols:%d, uid:%" PRId64 ", addr:%p", pSql,
+      tscTrace("%p update table meta, old: numOfTags:%d, numOfCols:%d, uid:%" PRId64 ", addr:%p", pSql,
-               pTableMetaInfo->numOfTags, pCmd->numOfCols, pTableMetaInfo->pTableMeta->uid, pTableMetaInfo->pTableMeta);
+               tscGetNumOfTags(pTableMeta), tscGetNumOfColumns(pTableMeta), pTableMeta->uid, pTableMeta);
    }
    tscWaitingForCreateTable(pCmd);
@@ -2495,7 +2495,6 @@ int tscGetSTableVgroupInfo(SSqlObj *pSql, int32_t clauseIndex) {
  }
 #if 0
  for (int32_t i = 0; i < pQueryInfo->numOfTables; ++i) {
    char tagstr[TSDB_MAX_TAGS_LEN + 1] = {0};
@@ -2534,7 +2533,7 @@ int tscGetSTableVgroupInfo(SSqlObj *pSql, int32_t clauseIndex) {
    STableMetaInfo *pMMInfo = tscGetMetaInfo(pQueryInfo, i);
    STableMeta *pTableMeta = taosCacheAcquireByName(tscCacheHandle, pMMInfo->name);
-    tscAddMeterMetaInfo(pNewQueryInfo, pMMInfo->name, pTableMeta, NULL, pMMInfo->numOfTags, pMMInfo->tagColumnIndex);
+    tscAddTableMetaInfo(pNewQueryInfo, pMMInfo->name, pTableMeta, NULL, pMMInfo->numOfTags, pMMInfo->tagColumnIndex);
  }
  if ((code = tscAllocPayload(&pNew->cmd, TSDB_DEFAULT_PAYLOAD_SIZE)) != TSDB_CODE_SUCCESS) {

--- a/src/client/src/tscSql.c
+++ b/src/client/src/tscSql.c
@@ -407,7 +407,7 @@ int taos_fetch_block_impl(TAOS_RES *res, TAOS_ROW *rows) {
  *rows = pRes->tsrow;
-  return (pQueryInfo->order.order == TSQL_SO_DESC) ? pRes->numOfRows : -pRes->numOfRows;
+  return (pQueryInfo->order.order == TSDB_ORDER_DESC) ? pRes->numOfRows : -pRes->numOfRows;
 }
 static void transferNcharData(SSqlObj *pSql, int32_t columnIndex, TAOS_FIELD *pField) {
@@ -502,14 +502,14 @@ static void **doSetResultRowData(SSqlObj *pSql) {
      }
      for(int32_t k = 0; k < sas->numOfCols; ++k) {
-        int32_t columnIndex = sas->pExpr->binExprInfo.pReqColumns[k].colIdxInBuf;
+        int32_t columnIndex = sas->pExpr->binExprInfo.pReqColumns[k].colIndex;
        SSqlExpr* pExpr = tscSqlExprGet(pQueryInfo, columnIndex);
        sas->elemSize[k] = pExpr->resBytes;
        sas->data[k] = (pRes->data + pRes->numOfRows* pExpr->offset) + pRes->row*pExpr->resBytes;
      }
-      tSQLBinaryExprCalcTraverse(sas->pExpr->binExprInfo.pBinExpr, 1, pRes->buffer[i], sas, TSQL_SO_ASC, getArithemicInputSrc);
+      tSQLBinaryExprCalcTraverse(sas->pExpr->binExprInfo.pBinExpr, 1, pRes->buffer[i], sas, TSDB_ORDER_ASC, getArithemicInputSrc);
      pRes->tsrow[i] = pRes->buffer[i];
      free(sas); //todo optimization

--- a/src/client/src/tscSubquery.c
+++ b/src/client/src/tscSubquery.c
@@ -26,7 +26,7 @@ typedef struct SInsertSupporter {
 static void freeSubqueryObj(SSqlObj* pSql);
 static bool doCompare(int32_t order, int64_t left, int64_t right) {
-  if (order == TSQL_SO_ASC) {
+  if (order == TSDB_ORDER_ASC) {
    return left < right;
  } else {
    return left > right;
@@ -136,8 +136,8 @@ static int64_t doTSBlockIntersect(SSqlObj* pSql, SJoinSubquerySupporter* pSuppor
   * 2. only one element for each tag.
   */
  if (output1->tsOrder == -1) {
-    output1->tsOrder = TSQL_SO_ASC;
+    output1->tsOrder = TSDB_ORDER_ASC;
-    output2->tsOrder = TSQL_SO_ASC;
+    output2->tsOrder = TSDB_ORDER_ASC;
  }
  tsBufFlush(output1);
@@ -1005,8 +1005,8 @@ int32_t tscHandleMasterSTableQuery(SSqlObj *pSql) {
  SQueryInfo *    pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
  STableMetaInfo *pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
-  int32_t numOfSubQueries = taosArrayGetSize(pTableMetaInfo->vgroupIdList);
+  pSql->numOfSubs = taosArrayGetSize(pTableMetaInfo->vgroupIdList);
-  assert(numOfSubQueries > 0);
+  assert(pSql->numOfSubs > 0);
  int32_t ret = tscLocalReducerEnvCreate(pSql, &pMemoryBuf, &pDesc, &pModel, nBufferSize);
  if (ret != 0) {
@@ -1017,16 +1017,15 @@ int32_t tscHandleMasterSTableQuery(SSqlObj *pSql) {
    return pRes->code;
  }
-  pSql->pSubs = calloc(numOfSubQueries, POINTER_BYTES);
+  pSql->pSubs = calloc(pSql->numOfSubs, POINTER_BYTES);
-  pSql->numOfSubs = numOfSubQueries;
-  tscTrace("%p retrieved query data from %d vnode(s)", pSql, numOfSubQueries);
+  tscTrace("%p retrieved query data from %d vnode(s)", pSql, pSql->numOfSubs);
  SSubqueryState *pState = calloc(1, sizeof(SSubqueryState));
-  pState->numOfTotal = numOfSubQueries;
+  pState->numOfTotal = pSql->numOfSubs;
  pRes->code = TSDB_CODE_SUCCESS;
  int32_t i = 0;
-  for (; i < numOfSubQueries; ++i) {
+  for (; i < pSql->numOfSubs; ++i) {
    SRetrieveSupport *trs = (SRetrieveSupport *)calloc(1, sizeof(SRetrieveSupport));
    if (trs == NULL) {
      tscError("%p failed to malloc buffer for SRetrieveSupport, orderOfSub:%d, reason:%s", pSql, i, strerror(errno));
@@ -1070,22 +1069,22 @@ int32_t tscHandleMasterSTableQuery(SSqlObj *pSql) {
    tscTrace("%p sub:%p create subquery success. orderOfSub:%d", pSql, pNew, trs->subqueryIndex);
  }
-  if (i < numOfSubQueries) {
+  if (i < pSql->numOfSubs) {
    tscError("%p failed to prepare subquery structure and launch subqueries", pSql);
    pRes->code = TSDB_CODE_CLI_OUT_OF_MEMORY;
-    tscLocalReducerEnvDestroy(pMemoryBuf, pDesc, pModel, numOfSubQueries);
+    tscLocalReducerEnvDestroy(pMemoryBuf, pDesc, pModel, pSql->numOfSubs);
    doCleanupSubqueries(pSql, i, pState);
    return pRes->code;   // free all allocated resource
  }
  if (pRes->code == TSDB_CODE_QUERY_CANCELLED) {
-    tscLocalReducerEnvDestroy(pMemoryBuf, pDesc, pModel, numOfSubQueries);
+    tscLocalReducerEnvDestroy(pMemoryBuf, pDesc, pModel, pSql->numOfSubs);
    doCleanupSubqueries(pSql, i, pState);
    return pRes->code;
  }
-  for(int32_t j = 0; j < numOfSubQueries; ++j) {
+  for(int32_t j = 0; j < pSql->numOfSubs; ++j) {
    SSqlObj* pSub = pSql->pSubs[j];
    SRetrieveSupport* pSupport = pSub->param;
@@ -1449,7 +1448,7 @@ void tscRetrieveDataRes(void *param, TAOS_RES *tres, int code) {
      tscTrace("%p sub:%p reach the max retry count,set global code:%d", pParentSql, pSql, code);
      atomic_val_compare_exchange_32(&pState->code, 0, code);
    } else {  // does not reach the maximum retry count, go on
-      tscTrace("%p sub:%p failed code:%d, retry:%d", pParentSql, pSql, code, trsupport->numOfRetry);
+      tscTrace("%p sub:%p failed code:%s, retry:%d", pParentSql, pSql, tstrerror(code), trsupport->numOfRetry);
      SSqlObj *pNew = tscCreateSqlObjForSubquery(pParentSql, trsupport, pSql);
      if (pNew == NULL) {

--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -53,7 +53,7 @@ void tscGetMetricMetaCacheKey(SQueryInfo* pQueryInfo, char* str, uint64_t uid) {
  const int32_t maxKeySize = TSDB_MAX_TAGS_LEN;  // allowed max key size
-  SCond* cond = tsGetSTableQueryCondPos(pTagCond, uid);
+  SCond* cond = tsGetSTableQueryCond(pTagCond, uid);
  char join[512] = {0};
  if (pTagCond->joinInfo.hasJoin) {
@@ -92,28 +92,41 @@ void tscGetMetricMetaCacheKey(SQueryInfo* pQueryInfo, char* str, uint64_t uid) {
  free(tmp);
 }
-SCond* tsGetSTableQueryCondPos(STagCond* pTagCond, uint64_t uid) {
+SCond* tsGetSTableQueryCond(STagCond* pTagCond, uint64_t uid) {
-  for (int32_t i = 0; i < TSDB_MAX_JOIN_TABLE_NUM; ++i) {
+  if (pTagCond->pCond == NULL) {
-    if (uid == pTagCond->cond[i].uid) {
+    return NULL;
-      return &pTagCond->cond[i];
+  }
+  size_t size = taosArrayGetSize(pTagCond->pCond);
+  for (int32_t i = 0; i < size; ++i) {
+    SCond* pCond = taosArrayGet(pTagCond->pCond, i);
+    if (uid == pCond->uid) {
+      return pCond;
    }
  }
  return NULL;
 }
-// todo refactor by using SArray
+void tsSetSTableQueryCond(STagCond* pTagCond, uint64_t uid, SBuffer* pBuf) {
-void tsSetSTableQueryCond(STagCond* pTagCond, uint64_t uid, const char* str) {
+  if (tbufTell(pBuf) == 0) {
-  size_t len = strlen(str);
-  if (len == 0) {
    return;
  }
-  SCond* pDest = &pTagCond->cond[pTagCond->numOfTagCond];
+  SCond cond = {
-  pDest->uid = uid;
+    .uid = uid,
-  pDest->cond = strdup(str);
+    .len = tbufTell(pBuf),
+    .cond = NULL,
+  };
+  cond.cond = tbufGetData(pBuf, true);
+  if (pTagCond->pCond == NULL) {
+    pTagCond->pCond = taosArrayInit(3, sizeof(SCond));
+  }
-  pTagCond->numOfTagCond += 1;
+  taosArrayPush(pTagCond->pCond, &cond);
 }
 bool tscQueryOnMetric(SSqlCmd* pCmd) {
@@ -1185,7 +1198,7 @@ SSqlExpr* tscSqlExprInsert(SQueryInfo* pQueryInfo, int32_t index, int16_t functi
    }
  }
-  pExpr->colInfo.colIdx = pColIndex->columnIndex;
+  pExpr->colInfo.colIndex = pColIndex->columnIndex;
  pExpr->resType = type;
  pExpr->resBytes = size;
  pExpr->interResBytes = interSize;
@@ -1207,7 +1220,7 @@ SSqlExpr* tscSqlExprUpdate(SQueryInfo* pQueryInfo, int32_t index, int16_t functi
  pExpr->functionId = functionId;
-  pExpr->colInfo.colIdx = srcColumnIndex;
+  pExpr->colInfo.colIndex = srcColumnIndex;
  pExpr->colInfo.colId = tscGetTableColumnSchema(pTableMetaInfo->pTableMeta, srcColumnIndex)->colId;
  pExpr->resType = type;
@@ -1642,26 +1655,46 @@ void tscTagCondCopy(STagCond* dest, const STagCond* src) {
  dest->tbnameCond.uid = src->tbnameCond.uid;
  memcpy(&dest->joinInfo, &src->joinInfo, sizeof(SJoinInfo));
+  dest->relType = src->relType;
-  for (int32_t i = 0; i < src->numOfTagCond; ++i) {
+  if (src->pCond == NULL) {
-    if (src->cond[i].cond != NULL) {
+    return;
-      dest->cond[i].cond = strdup(src->cond[i].cond);
  }
-    dest->cond[i].uid = src->cond[i].uid;
+  size_t s = taosArrayGetSize(src->pCond);
+  dest->pCond = taosArrayInit(s, sizeof(SCond));
+  for (int32_t i = 0; i < s; ++i) {
+    SCond* pCond = taosArrayGet(src->pCond, i);
+    SCond c = {0};
+    c.len = pCond->len;
+    c.uid = pCond->uid;
+    if (pCond->len > 0) {
+      assert(pCond->cond != NULL);
+      c.cond = malloc(c.len);
+      memcpy(c.cond, pCond->cond, c.len);
    }
-  dest->relType = src->relType;
+    taosArrayPush(dest->pCond, &c);
-  dest->numOfTagCond = src->numOfTagCond;
+  }
 }
-void tscTagCondRelease(STagCond* pCond) {
+void tscTagCondRelease(STagCond* pTagCond) {
-  free(pCond->tbnameCond.cond);
+  free(pTagCond->tbnameCond.cond);
-  for (int32_t i = 0; i < pCond->numOfTagCond; ++i) {
-    free(pCond->cond[i].cond);
+  if (pTagCond->pCond != NULL) {
+    size_t s = taosArrayGetSize(pTagCond->pCond);
+    for (int32_t i = 0; i < s; ++i) {
+      SCond* p = taosArrayGet(pTagCond->pCond, i);
+      tfree(p->cond);
+    }
+    taosArrayDestroy(pTagCond->pCond);
  }
-  memset(pCond, 0, sizeof(STagCond));
+  memset(pTagCond, 0, sizeof(STagCond));
 }
 void tscGetSrcColumnInfo(SSrcColumnInfo* pColInfo, SQueryInfo* pQueryInfo) {
@@ -1674,11 +1707,11 @@ void tscGetSrcColumnInfo(SSrcColumnInfo* pColInfo, SQueryInfo* pQueryInfo) {
    if (TSDB_COL_IS_TAG(pExpr->colInfo.flag)) {
      SSchema* pTagSchema = tscGetTableTagSchema(pTableMetaInfo->pTableMeta);
-      int16_t  actualTagIndex = pTableMetaInfo->tagColumnIndex[pExpr->colInfo.colIdx];
+      int16_t  actualTagIndex = pTableMetaInfo->tagColumnIndex[pExpr->colInfo.colIndex];
      pColInfo[i].type = (actualTagIndex != -1) ? pTagSchema[actualTagIndex].type : TSDB_DATA_TYPE_BINARY;
    } else {
-      pColInfo[i].type = pSchema[pExpr->colInfo.colIdx].type;
+      pColInfo[i].type = pSchema[pExpr->colInfo.colIndex].type;
    }
  }
 }
@@ -1880,8 +1913,8 @@ void tscFreeSubqueryInfo(SSqlCmd* pCmd) {
  tfree(pCmd->pQueryInfo);
 }
-STableMetaInfo* tscAddMeterMetaInfo(SQueryInfo* pQueryInfo, const char* name, STableMeta* pTableMeta,
+STableMetaInfo* tscAddTableMetaInfo(SQueryInfo* pQueryInfo, const char* name, STableMeta* pTableMeta,
-                                    SSuperTableMeta* pMetricMeta, int16_t numOfTags, int16_t* tags) {
+                                    SArray* vgroupList, int16_t numOfTags, int16_t* tags) {
  void* pAlloc = realloc(pQueryInfo->pTableMetaInfo, (pQueryInfo->numOfTables + 1) * POINTER_BYTES);
  if (pAlloc == NULL) {
    return NULL;
@@ -1901,6 +1934,10 @@ STableMetaInfo* tscAddMeterMetaInfo(SQueryInfo* pQueryInfo, const char* name, ST
  pTableMetaInfo->pTableMeta = pTableMeta;
  pTableMetaInfo->numOfTags = numOfTags;
+  if (vgroupList != NULL) {
+    pTableMetaInfo->vgroupIdList = taosArrayClone(vgroupList);
+  }
  if (tags != NULL) {
    memcpy(pTableMetaInfo->tagColumnIndex, tags, sizeof(pTableMetaInfo->tagColumnIndex[0]) * numOfTags);
  }
@@ -1910,7 +1947,7 @@ STableMetaInfo* tscAddMeterMetaInfo(SQueryInfo* pQueryInfo, const char* name, ST
 }
 STableMetaInfo* tscAddEmptyMetaInfo(SQueryInfo* pQueryInfo) {
-  return tscAddMeterMetaInfo(pQueryInfo, NULL, NULL, NULL, 0, NULL);
+  return tscAddTableMetaInfo(pQueryInfo, NULL, NULL, NULL, 0, NULL);
 }
 void doRemoveMeterMetaInfo(SQueryInfo* pQueryInfo, int32_t index, bool removeFromCache) {
@@ -1962,14 +1999,14 @@ void tscResetForNextRetrieve(SSqlRes* pRes) {
 SSqlObj* createSubqueryObj(SSqlObj* pSql, int16_t tableIndex, void (*fp)(), void* param, int32_t cmd, SSqlObj* pPrevSql) {
  SSqlCmd* pCmd = &pSql->cmd;
-  STableMetaInfo* pTableMetaInfo = tscGetTableMetaInfoFromCmd(pCmd, pCmd->clauseIndex, tableIndex);
  SSqlObj* pNew = (SSqlObj*)calloc(1, sizeof(SSqlObj));
  if (pNew == NULL) {
-    tscError("%p new subquery failed, tableIndex:%d, vnodeIndex:%d", pSql, tableIndex, pTableMetaInfo->vnodeIndex);
+    tscError("%p new subquery failed, tableIndex:%d", pSql, tableIndex);
    return NULL;
  }
+  STableMetaInfo* pTableMetaInfo = tscGetTableMetaInfoFromCmd(pCmd, pCmd->clauseIndex, tableIndex);
  pNew->pTscObj = pSql->pTscObj;
  pNew->signature = pNew;
@@ -2084,12 +2121,12 @@ SSqlObj* createSubqueryObj(SSqlObj* pSql, int16_t tableIndex, void (*fp)(), void
  if (pPrevSql == NULL) {
    STableMeta* pTableMeta = taosCacheAcquireByName(tscCacheHandle, name);
-    SSuperTableMeta* pMetricMeta = NULL;
+//    SSuperTableMeta* pMetricMeta = NULL;
-    if (cmd == TSDB_SQL_SELECT) {
+//    if (cmd == TSDB_SQL_SELECT) {
-      pMetricMeta = taosCacheAcquireByName(tscCacheHandle, key);
+//      pMetricMeta = taosCacheAcquireByName(tscCacheHandle, key);
-    }
+//    }
-    pFinalInfo = tscAddMeterMetaInfo(pNewQueryInfo, name, pTableMeta, pMetricMeta, pTableMetaInfo->numOfTags,
+    pFinalInfo = tscAddTableMetaInfo(pNewQueryInfo, name, pTableMeta, pTableMetaInfo->vgroupIdList, pTableMetaInfo->numOfTags,
                                     pTableMetaInfo->tagColumnIndex);
  } else {  // transfer the ownership of pTableMeta/pMetricMeta to the newly create sql object.
 //    STableMetaInfo* pPrevInfo = tscGetTableMetaInfoFromCmd(&pPrevSql->cmd, pPrevSql->cmd.clauseIndex, 0);
@@ -2097,7 +2134,7 @@ SSqlObj* createSubqueryObj(SSqlObj* pSql, int16_t tableIndex, void (*fp)(), void
 //    STableMeta*  pPrevMeterMeta = taosCacheTransfer(tscCacheHandle, (void**)&pPrevInfo->pTableMeta);
 //    SSuperTableMeta* pPrevMetricMeta = taosCacheTransfer(tscCacheHandle, (void**)&pPrevInfo->pMetricMeta);
-//    pFinalInfo = tscAddMeterMetaInfo(pNewQueryInfo, name, pPrevMeterMeta, pPrevMetricMeta, pTableMetaInfo->numOfTags,
+//    pFinalInfo = tscAddTableMetaInfo(pNewQueryInfo, name, pPrevMeterMeta, pPrevMetricMeta, pTableMetaInfo->numOfTags,
 //                                     pTableMetaInfo->tagColumnIndex);
  }

--- a/src/inc/taosdef.h
+++ b/src/inc/taosdef.h
@@ -147,10 +147,10 @@ void tsDataSwap(void *pLeft, void *pRight, int32_t type, int32_t size);
 // TODO: check if below is necessary
 #define TSDB_RELATION_INVALID     0
 #define TSDB_RELATION_LESS        1
-#define TSDB_RELATION_LARGE       2
+#define TSDB_RELATION_GREATER     2
 #define TSDB_RELATION_EQUAL       3
 #define TSDB_RELATION_LESS_EQUAL  4
-#define TSDB_RELATION_LARGE_EQUAL 5
+#define TSDB_RELATION_GREATER_EQUAL 5
 #define TSDB_RELATION_NOT_EQUAL   6
 #define TSDB_RELATION_LIKE        7
@@ -303,8 +303,8 @@ void tsDataSwap(void *pLeft, void *pRight, int32_t type, int32_t size);
 #define TSDB_QUERY_SET_TYPE(x, _type)         ((x) |= (_type))
 #define TSDB_QUERY_RESET_TYPE(x)              ((x) = TSDB_QUERY_TYPE_NON_TYPE)
-#define TSQL_SO_ASC   1
+#define TSDB_ORDER_ASC   1
-#define TSQL_SO_DESC  0
+#define TSDB_ORDER_DESC  2
 #define TSDB_SESSIONS_PER_VNODE (300)
 #define TSDB_SESSIONS_PER_DNODE (TSDB_SESSIONS_PER_VNODE * TSDB_MAX_VNODES)

--- a/src/inc/taosmsg.h
+++ b/src/inc/taosmsg.h
@@ -358,7 +358,7 @@ typedef struct {
  int32_t vgId;
 } SMDDropVnodeMsg;
-typedef struct SColIndexEx {
+typedef struct SColIndex {
  int16_t colId;
  /*
   * colIdx is the index of column in latest schema of table
@@ -368,11 +368,10 @@ typedef struct SColIndexEx {
   * colIdxInBuf is used to denote the index of column in pQuery->colList,
   * this value is invalid in client side, as well as in cache block of vnode either.
   */
-  int16_t  colIdx;
+  int16_t  colIndex;
-  int16_t  colIdxInBuf;
  uint16_t flag;  // denote if it is a tag or not
  char     name[TSDB_COL_NAME_LEN];
-} SColIndexEx;
+} SColIndex;
 /* sql function msg, to describe the message to vnode about sql function
 * operations in select clause */
@@ -380,7 +379,7 @@ typedef struct SSqlFuncExprMsg {
  int16_t functionId;
  int16_t numOfParams;
-  SColIndexEx colInfo;
+  SColIndex colInfo;
  struct ArgElem {
    int16_t argType;
    int16_t argBytes;
@@ -395,7 +394,7 @@ typedef struct SSqlFuncExprMsg {
 typedef struct SSqlBinaryExprInfo {
  struct tExprNode *pBinExpr;    /*  for binary expression */
  int32_t           numOfCols;   /*  binary expression involves the readed number of columns*/
-  SColIndexEx *     pReqColumns; /*  source column list */
+  SColIndex *     pReqColumns;   /*  source column list */
 } SSqlBinaryExprInfo;
 typedef struct SSqlFunctionExpr {
@@ -467,7 +466,6 @@ typedef struct {
  int64_t     slidingTime;      // value for sliding window
  char        slidingTimeUnit;  // time interval type, for revisement of interval(1d)
  uint16_t    tagCondLen;       // tag length in current query
-  uint16_t    nameCondLen;      // table name in/like query expression string length
  int16_t     numOfGroupCols;   // num of group by columns
  int16_t     orderByIdx;
  int16_t     orderType;        // used in group by xx order by xxx

--- a/src/query/inc/qast.h
+++ b/src/query/inc/qast.h
@@ -48,7 +48,7 @@ typedef void (*__do_filter_suppl_fn_t)(void *, void *);
 */
 typedef struct tQueryInfo {
  int32_t       offset;   // offset value in tags
-  int32_t       colIdx;   // index of column in schema
+  int32_t       colIndex; // index of column in schema
  uint8_t       optr;     // expression operator
  SSchema       sch;      // schema of tags
  tVariant      q;        // query condition value on the specific schema, filter expression
@@ -83,7 +83,7 @@ void tSQLBinaryExprToString(tExprNode *pExpr, char *dst, int32_t *len);
 void tExprTreeDestroy(tExprNode **pExprs, void (*fp)(void*));
-void tSQLBinaryExprTraverse(tExprNode *pExpr, SSkipList *pSkipList, SArray *result, SBinaryFilterSupp *param);
+void tExprTreeTraverse(tExprNode *pExpr, SSkipList *pSkipList, SArray *result, SBinaryFilterSupp *param);
 void tSQLBinaryExprCalcTraverse(tExprNode *pExprs, int32_t numOfRows, char *pOutput, void *param, int32_t order,
                                char *(*cb)(void *, char *, int32_t));
@@ -94,7 +94,7 @@ uint8_t getBinaryExprOptr(SSQLToken *pToken);
 SBuffer exprTreeToBinary(tExprNode* pExprTree);
-tExprNode* exprTreeFromBinary(const void* pBuf, size_t size);
+int32_t exprTreeFromBinary(const void* pBuf, size_t size, tExprNode** pExprNode);
 #ifdef __cplusplus
 }

--- a/src/query/inc/queryExecutor.h
+++ b/src/query/inc/queryExecutor.h
@@ -39,7 +39,7 @@ typedef int32_t (*__block_search_fn_t)(char* data, int32_t num, int64_t key, int
 typedef struct SSqlGroupbyExpr {
  int16_t     tableIndex;
  int16_t     numOfGroupCols;
-  SColIndexEx columnInfo[TSDB_MAX_TAGS];  // group by columns information
+  SColIndex columnInfo[TSDB_MAX_TAGS];  // group by columns information
  int16_t     orderIndex;                 // order by column index
  int16_t     orderType;                  // order by type: asc/desc
 } SSqlGroupbyExpr;
@@ -63,7 +63,7 @@ typedef struct SWindowResult {
 typedef struct SResultRec {
  int64_t total;     // total generated result size in rows
-  int64_t size;      // current result set size in rows
+  int64_t rows;      // current result set size in rows
  int64_t capacity;  // capacity of current result output buffer
  // result size threshold in rows. If the result buffer is larger than this, pause query and return to client
@@ -125,7 +125,7 @@ typedef struct SQuery {
  int8_t            precision;
  int16_t           numOfOutputCols;
  int16_t           interpoType;
-  int16_t           checkBufferInLoop;  // check if the buffer is full during scan each block
+  int16_t           checkBuffer;  // check if the buffer is full during scan each block
  SLimitVal         limit;
  int32_t           rowSize;
  SSqlGroupbyExpr*  pGroupbyExpr;

--- a/src/query/inc/sql.y
+++ b/src/query/inc/sql.y
@@ -466,9 +466,9 @@ item(A) ::= ids(X) cpxName(Y).   {
 }
 %type sortorder {int}
-sortorder(A) ::= ASC.           {A = TSQL_SO_ASC; }
+sortorder(A) ::= ASC.           {A = TSDB_ORDER_ASC; }
-sortorder(A) ::= DESC.          {A = TSQL_SO_DESC;}
+sortorder(A) ::= DESC.          {A = TSDB_ORDER_DESC;}
-sortorder(A) ::= .              {A = TSQL_SO_ASC;}  //default is descend order
+sortorder(A) ::= .              {A = TSDB_ORDER_ASC;}  //default is descend order
 //group by clause
 %type groupby_opt {tVariantList*}

--- a/src/query/inc/tsqlfunction.h
+++ b/src/query/inc/tsqlfunction.h
@@ -102,7 +102,7 @@ extern "C" {
 #define QUERY_ASC_FORWARD_STEP 1
 #define QUERY_DESC_FORWARD_STEP -1
-#define GET_FORWARD_DIRECTION_FACTOR(ord) (((ord) == TSQL_SO_ASC) ? QUERY_ASC_FORWARD_STEP : QUERY_DESC_FORWARD_STEP)
+#define GET_FORWARD_DIRECTION_FACTOR(ord) (((ord) == TSDB_ORDER_ASC) ? QUERY_ASC_FORWARD_STEP : QUERY_DESC_FORWARD_STEP)
 #define MAX_RETRIEVE_ROWS_IN_INTERVAL_QUERY 10000000
 #define TOP_BOTTOM_QUERY_LIMIT 100

--- a/src/query/src/qast.c
+++ b/src/query/src/qast.c
@@ -18,6 +18,7 @@
 #include "tutil.h"
 #include "tbuffer.h"
 #include "qast.h"
+#include "tcompare.h"
 #include "qsqlparser.h"
 #include "qsyntaxtreefunction.h"
 #include "taosdef.h"
@@ -79,22 +80,22 @@ static void reviseBinaryExprIfNecessary(tExprNode **pLeft, tExprNode **pRight, u
   * switch left and left and right hand side in expr if possible
   */
  if ((*pLeft)->nodeType == TSQL_NODE_VALUE && (*pRight)->nodeType == TSQL_NODE_COL) {
-    if (*optr >= TSDB_RELATION_LARGE && *optr <= TSDB_RELATION_LARGE_EQUAL && *optr != TSDB_RELATION_EQUAL) {
+    if (*optr >= TSDB_RELATION_GREATER && *optr <= TSDB_RELATION_GREATER_EQUAL && *optr != TSDB_RELATION_EQUAL) {
      SWAP(*pLeft, *pRight, tExprNode *);
    }
    switch (*optr) {
-      case TSDB_RELATION_LARGE:
+      case TSDB_RELATION_GREATER:
        (*optr) = TSDB_RELATION_LESS;
        break;
      case TSDB_RELATION_LESS:
-        (*optr) = TSDB_RELATION_LARGE;
+        (*optr) = TSDB_RELATION_GREATER;
        break;
-      case TSDB_RELATION_LARGE_EQUAL:
+      case TSDB_RELATION_GREATER_EQUAL:
        (*optr) = TSDB_RELATION_LESS_EQUAL;
        break;
      case TSDB_RELATION_LESS_EQUAL:
-        (*optr) = TSDB_RELATION_LARGE_EQUAL;
+        (*optr) = TSDB_RELATION_GREATER_EQUAL;
        break;
      default:;
        // for other type of operations, do nothing
@@ -163,9 +164,9 @@ uint8_t getBinaryExprOptr(SSQLToken *pToken) {
    case TK_LE:
      return TSDB_RELATION_LESS_EQUAL;
    case TK_GT:
-      return TSDB_RELATION_LARGE;
+      return TSDB_RELATION_GREATER;
    case TK_GE:
-      return TSDB_RELATION_LARGE_EQUAL;
+      return TSDB_RELATION_GREATER_EQUAL;
    case TK_NE:
      return TSDB_RELATION_NOT_EQUAL;
    case TK_AND:
@@ -376,12 +377,12 @@ static char *tSQLOptrToString(uint8_t optr, char *dst) {
      dst += 1;
      break;
    }
-    case TSDB_RELATION_LARGE: {
+    case TSDB_RELATION_GREATER: {
      *dst = '>';
      dst += 1;
      break;
    }
-    case TSDB_RELATION_LARGE_EQUAL: {
+    case TSDB_RELATION_GREATER_EQUAL: {
      *dst = '>';
      *(dst + 1) = '=';
      dst += 2;
@@ -466,8 +467,18 @@ void tExprTreeDestroy(tExprNode **pExpr, void (*fp)(void *)) {
  *pExpr = NULL;
 }
+typedef struct {
+  tVariant v;
+  int32_t  optr;
+} SEndPoint;
+typedef struct {
+  SEndPoint* start;
+  SEndPoint* end;
+} SQueryCond;
 //static void setInitialValueForRangeQueryCondition(tSKipListQueryCond *q, int8_t type) {
-//  q->lowerBndRelOptr = TSDB_RELATION_LARGE;
+//  q->lowerBndRelOptr = TSDB_RELATION_GREATER;
 //  q->upperBndRelOptr = TSDB_RELATION_LESS;
 //
 //  switch (type) {
@@ -504,60 +515,100 @@ void tExprTreeDestroy(tExprNode **pExpr, void (*fp)(void *)) {
 //  }
 //}
-//static void tSQLDoFilterInitialResult(tSkipList *pSkipList, bool (*fp)(), tQueryInfo *queryColInfo,
+// todo check for malloc failure
-//                                      tQueryResultset *result) {
+static int32_t setQueryCond(tQueryInfo *queryColInfo, SQueryCond* pCond) {
-//  // primary key filter, search according to skiplist
+  int32_t optr = queryColInfo->optr;
-//  if (queryColInfo->colIdx == 0 && queryColInfo->optr != TSDB_RELATION_LIKE) {
-//    tSKipListQueryCond q;
+  if (optr == TSDB_RELATION_GREATER || optr == TSDB_RELATION_GREATER_EQUAL ||
-//    setInitialValueForRangeQueryCondition(&q, queryColInfo->q.nType);
+      optr == TSDB_RELATION_EQUAL || optr == TSDB_RELATION_NOT_EQUAL) {
-//
+    pCond->start = calloc(1, sizeof(tVariant));
-//    switch (queryColInfo->optr) {
-//      case TSDB_RELATION_EQUAL: {
+    tVariantAssign(&pCond->start->v, &queryColInfo->q);
-//        result->num =
+    pCond->start->optr = queryColInfo->optr;
-//            tSkipListPointQuery(pSkipList, &queryColInfo->q, 1, INCLUDE_POINT_QUERY, (tSkipListNode ***)&result->pRes);
+  } else if (optr == TSDB_RELATION_LESS || optr == TSDB_RELATION_LESS_EQUAL) {
-//        break;
+    pCond->end = calloc(1, sizeof(tVariant));
-//      }
-//      case TSDB_RELATION_NOT_EQUAL: {
+    tVariantAssign(&pCond->end->v, &queryColInfo->q);
-//        result->num =
+    pCond->end->optr = queryColInfo->optr;
-//            tSkipListPointQuery(pSkipList, &queryColInfo->q, 1, EXCLUDE_POINT_QUERY, (tSkipListNode ***)&result->pRes);
+  }
-//        break;
-//      }
+  return TSDB_CODE_SUCCESS;
-//      case TSDB_RELATION_LESS_EQUAL: {
+}
-//        tVariantAssign(&q.upperBnd, &queryColInfo->q);
-//        q.upperBndRelOptr = queryColInfo->optr;
+static void tQueryOnSkipList(SSkipList* pSkipList, SQueryCond* pCond, int32_t type, SArray* result) {
-//        result->num = tSkipListQuery(pSkipList, &q, (tSkipListNode ***)&result->pRes);
+  SSkipListIterator* iter = NULL;
-//        break;
-//      }
+  if (pCond->start != NULL) {
-//      case TSDB_RELATION_LESS: {
+    iter = tSkipListCreateIterFromVal(pSkipList, (char*) &pCond->start->v.i64Key, type, TSDB_ORDER_ASC);
-//        tVariantAssign(&q.upperBnd, &queryColInfo->q);
+  } else {
-//        result->num = tSkipListQuery(pSkipList, &q, (tSkipListNode ***)&result->pRes);
+    iter = tSkipListCreateIterFromVal(pSkipList, (char*) &pCond->end->v.i64Key, type, TSDB_ORDER_DESC);
-//        break;
+  }
-//      }
-//      case TSDB_RELATION_LARGE: {
+  __compar_fn_t func = getComparFunc(pSkipList->keyInfo.type, type);
-//        tVariantAssign(&q.lowerBnd, &queryColInfo->q);
-//        result->num = tSkipListQuery(pSkipList, &q, (tSkipListNode ***)&result->pRes);
+  if (pCond->start != NULL) {
-//        break;
+    int32_t optr = pCond->start->optr;
-//      }
-//      case TSDB_RELATION_LARGE_EQUAL: {
+    if (optr == TSDB_RELATION_EQUAL) {
-//        tVariantAssign(&q.lowerBnd, &queryColInfo->q);
+      while(tSkipListIterNext(iter)) {
-//        q.lowerBndRelOptr = queryColInfo->optr;
+        SSkipListNode* pNode = tSkipListIterGet(iter);
-//        result->num = tSkipListQuery(pSkipList, &q, (tSkipListNode ***)&result->pRes);
-//        break;
+        int32_t ret = func(SL_GET_NODE_KEY(pSkipList, pNode), &pCond->start->v.i64Key);
-//      }
+        if (ret == 0) {
-//      default:
+          taosArrayPush(result, SL_GET_NODE_DATA(pNode));
-//        pTrace("skiplist:%p, unsupport query operator:%d", pSkipList, queryColInfo->optr);
+        } else {
-//    }
+          break;
-//
+        }
-//    tSkipListDestroyKey(&q.upperBnd);
+      }
-//    tSkipListDestroyKey(&q.lowerBnd);
+    } else if (optr == TSDB_RELATION_GREATER || optr == TSDB_RELATION_GREATER_EQUAL) {
-//  } else {
+      bool comp = true;
-//    /*
+      int32_t ret = 0;
-//     * Brutal force scan the whole skiplit to find the appropriate result,
-//     * since the filter is not applied to indexed column.
+      while(tSkipListIterNext(iter)) {
-//     */
+        SSkipListNode* pNode = tSkipListIterGet(iter);
-//    result->num = tSkipListIterateList(pSkipList, (tSkipListNode ***)&result->pRes, fp, queryColInfo);
-//  }
+        if (comp) {
-//}
+          ret = func(SL_GET_NODE_KEY(pSkipList, pNode), &pCond->start->v.i64Key);
+          assert(ret <= 0);
+        }
+        if (ret == 0 && optr == TSDB_RELATION_GREATER) {
+          continue;
+        } else {
+          taosArrayPush(result, SL_GET_NODE_DATA(pNode));
+          comp = false;
+        }
+      }
+    } else if (optr == TSDB_RELATION_NOT_EQUAL) {
+      assert(0);
+    } else {
+      assert(0);
+    }
+  } else {
+    int32_t optr = pCond->end->optr;
+    if (optr == TSDB_RELATION_LESS || optr == TSDB_RELATION_LESS_EQUAL) {
+      bool comp = true;
+      int32_t ret = 0;
+      while(tSkipListIterNext(iter)) {
+        SSkipListNode* pNode = tSkipListIterGet(iter);
+        if (comp) {
+          ret = func(SL_GET_NODE_KEY(pSkipList, pNode), &pCond->start->v.i64Key);
+          assert(ret >= 0);
+        }
+        if (ret == 0 && optr == TSDB_RELATION_LESS) {
+          continue;
+        } else {
+          taosArrayPush(result, SL_GET_NODE_DATA(pNode));
+          comp = false;  // no need to compare anymore
+        }
+      }
+    }
+  }
+}
 /*
 * qsort comparator
@@ -670,9 +721,7 @@ static bool filterItem(tExprNode *pExpr, const void *pItem, SBinaryFilterSupp *p
  tExprNode *pLeft = pExpr->_node.pLeft;
  tExprNode *pRight = pExpr->_node.pRight;
-  /*
+  //non-leaf nodes, recursively traverse the expression tree in the post-root order
-   * non-leaf nodes, recursively traverse the syntax tree in the post-root order
-   */
  if (pLeft->nodeType == TSQL_NODE_EXPR && pRight->nodeType == TSQL_NODE_EXPR) {
    if (pExpr->_node.optr == TSDB_RELATION_OR) {  // or
      if (filterItem(pLeft, pItem, param)) {
@@ -707,7 +756,7 @@ static bool filterItem(tExprNode *pExpr, const void *pItem, SBinaryFilterSupp *p
 * @param pSchema   tag schemas
 * @param fp        filter callback function
 */
-static void tSQLBinaryTraverseOnResult(tExprNode *pExpr, SArray *pResult, SBinaryFilterSupp *param) {
+static void exprTreeTraverseImpl(tExprNode *pExpr, SArray *pResult, SBinaryFilterSupp *param) {
  size_t size = taosArrayGetSize(pResult);
  SArray* array = taosArrayInit(size, POINTER_BYTES);
@@ -736,7 +785,7 @@ static void tSQLBinaryTraverseOnSkipList(tExprNode *pExpr, SArray *pResult, SSki
 }
 // post-root order traverse syntax tree
-void tSQLBinaryExprTraverse(tExprNode *pExpr, SSkipList *pSkipList, SArray *result, SBinaryFilterSupp *param) {
+void tExprTreeTraverse(tExprNode *pExpr, SSkipList *pSkipList, SArray *result, SBinaryFilterSupp *param) {
  if (pExpr == NULL) {
    return;
  }
@@ -755,7 +804,7 @@ void tSQLBinaryExprTraverse(tExprNode *pExpr, SSkipList *pSkipList, SArray *resu
       *
       * if the query is a high selectivity filter, only small portion of meters are retrieved.
       */
-      tSQLBinaryTraverseOnResult(pExpr, result, param);
+      exprTreeTraverseImpl(pExpr, result, param);
    } else if (weight == 0) {
      /**
       * apply the hierarchical expression to every node in skiplist for find the qualified nodes
@@ -766,8 +815,8 @@ void tSQLBinaryExprTraverse(tExprNode *pExpr, SSkipList *pSkipList, SArray *resu
      SArray* rLeft  = taosArrayInit(10, POINTER_BYTES);
      SArray* rRight = taosArrayInit(10, POINTER_BYTES);
-      tSQLBinaryExprTraverse(pLeft, pSkipList, rLeft, param);
+      tExprTreeTraverse(pLeft, pSkipList, rLeft, param);
-      tSQLBinaryExprTraverse(pRight, pSkipList, rRight, param);
+      tExprTreeTraverse(pRight, pSkipList, rRight, param);
      if (pExpr->_node.optr == TSDB_RELATION_AND) {  // CROSS
        intersect(rLeft, rRight, result);
@@ -801,13 +850,13 @@ void tSQLBinaryExprTraverse(tExprNode *pExpr, SSkipList *pSkipList, SArray *resu
      assert(pFirst != pSecond && pFirst != NULL && pSecond != NULL);
      // we filter the result based on the skiplist index in the first place
-      tSQLBinaryExprTraverse(pFirst, pSkipList, result, param);
+      tExprTreeTraverse(pFirst, pSkipList, result, param);
      /*
       * recursively perform the filter operation based on the initial results,
-       * So, we do not set the skiplist index as a parameter
+       * So, we do not set the skip list index as a parameter
       */
-      tSQLBinaryExprTraverse(pSecond, NULL, result, param);
+      tExprTreeTraverse(pSecond, NULL, result, param);
    }
  } else {  // column project
    assert(pLeft->nodeType == TSQL_NODE_COL && pRight->nodeType == TSQL_NODE_VALUE);
@@ -816,8 +865,19 @@ void tSQLBinaryExprTraverse(tExprNode *pExpr, SSkipList *pSkipList, SArray *resu
    if (pSkipList == NULL) {
      tSQLListTraverseOnResult(pExpr, param->fp, result);
    } else {
-//      assert(result->num == 0);
+      tQueryInfo *pQueryInfo = pExpr->_node.info;
-//      tSQLDoFilterInitialResult(pSkipList, param->fp, pExpr->info, result);
+      if (pQueryInfo->colIndex == 0 && pQueryInfo->optr != TSDB_RELATION_LIKE) {
+        SQueryCond cond = {0};
+        /*int32_t ret = */setQueryCond(pQueryInfo, &cond);
+        tQueryOnSkipList(pSkipList, &cond, pQueryInfo->q.nType, result);
+      } else {
+        /* Brutal force scan the whole skip list to find the appropriate result,
+         * since the filter is not applied to indexed column.
+         */
+        assert(0);
+//    result->num = tSkipListIterateList(pSkipList, (tSkipListNode ***)&result->pRes, fp, queryColInfo);
+      }
    }
  }
 }
@@ -1012,11 +1072,10 @@ static void exprTreeFromBinaryImpl(tExprNode** pExprTree, SBuffer* pBuf) {
  *pExprTree = pExpr;
 }
-tExprNode* exprTreeFromBinary(const void* pBuf, size_t size) {
+int32_t exprTreeFromBinary(const void* pBuf, size_t size, tExprNode** pExprNode) {
  SBuffer rbuf = {0};
  /*int32_t code =*/ tbufBeginRead(&rbuf, pBuf, size);
+  exprTreeFromBinaryImpl(pExprNode, &rbuf);
-  tExprNode* pExprNode = NULL;
+  return TSDB_CODE_SUCCESS;
-  exprTreeFromBinaryImpl(&pExprNode, &rbuf);
-  return pExprNode;
 }
--- a/src/query/src/qextbuffer.c
+++ b/src/query/src/qextbuffer.c
@@ -345,7 +345,7 @@ static FORCE_INLINE int32_t primaryKeyComparator(int64_t f1, int64_t f2, int32_t
    return 0;
  }
-  if (colIdx == 0 && tsOrder == TSQL_SO_DESC) {  // primary column desc order
+  if (colIdx == 0 && tsOrder == TSDB_ORDER_DESC) {  // primary column desc order
    return (f1 < f2) ? 1 : -1;
  } else {  // asc
    return (f1 < f2) ? -1 : 1;
@@ -628,7 +628,7 @@ static int32_t qsort_call = 0;
 void tColDataQSort(tOrderDescriptor *pDescriptor, int32_t numOfRows, int32_t start, int32_t end, char *data,
                   int32_t orderType) {
  // short array sort, incur another sort procedure instead of quick sort process
-  __col_compar_fn_t compareFn = (orderType == TSQL_SO_ASC) ? compare_sa : compare_sd;
+  __col_compar_fn_t compareFn = (orderType == TSDB_ORDER_ASC) ? compare_sa : compare_sd;
  if (end - start + 1 <= 8) {
    tColDataInsertSort(pDescriptor, numOfRows, start, end, data, compareFn);

--- a/src/query/src/qinterpolation.c
+++ b/src/query/src/qinterpolation.c
@@ -20,7 +20,7 @@
 #include "taosmsg.h"
 #include "tsqlfunction.h"
-#define INTERPOL_IS_ASC_INTERPOL(interp) ((interp)->order == TSQL_SO_ASC)
+#define INTERPOL_IS_ASC_INTERPOL(interp) ((interp)->order == TSDB_ORDER_ASC)
 int64_t taosGetIntervalStartTimestamp(int64_t startTime, int64_t timeRange, char intervalTimeUnit, int16_t precision) {
  if (timeRange == 0) {
@@ -96,7 +96,7 @@ void taosInterpoSetStartInfo(SInterpolationInfo* pInterpoInfo, int32_t numOfRawD
 }
 TSKEY taosGetRevisedEndKey(TSKEY ekey, int32_t order, int32_t timeInterval, int8_t intervalTimeUnit, int8_t precision) {
-  if (order == TSQL_SO_ASC) {
+  if (order == TSDB_ORDER_ASC) {
    return ekey;
  } else {
    return taosGetIntervalStartTimestamp(ekey, timeInterval, intervalTimeUnit, precision);

--- a/src/query/src/qpercentile.c
+++ b/src/query/src/qpercentile.c
@@ -83,7 +83,7 @@ static tFilePage *loadIntoBucketFromDisk(tMemBucket *pMemBucket, int32_t segIdx,
    pListItem = pListItem->pNext;
  }
-  tColDataQSort(pDesc, buffer->numOfElems, 0, buffer->numOfElems - 1, buffer->data, TSQL_SO_ASC);
+  tColDataQSort(pDesc, buffer->numOfElems, 0, buffer->numOfElems - 1, buffer->data, TSDB_ORDER_ASC);
  pDesc->pColumnModel->capacity = oldCapacity;  // restore value
  return buffer;

--- a/src/query/src/qsyntaxtreefunction.c
+++ b/src/query/src/qsyntaxtreefunction.c
@@ -21,8 +21,8 @@
 #define ARRAY_LIST_OP(left, right, _left_type, _right_type, len1, len2, out, op, _res_type, _ord)     \
  {                                                                                                   \
-    int32_t i = ((_ord) == TSQL_SO_ASC) ? 0 : MAX(len1, len2) - 1;                                    \
+    int32_t i = ((_ord) == TSDB_ORDER_ASC) ? 0 : MAX(len1, len2) - 1;                                    \
-    int32_t step = ((_ord) == TSQL_SO_ASC) ? 1 : -1;                                                  \
+    int32_t step = ((_ord) == TSDB_ORDER_ASC) ? 1 : -1;                                                  \
                                                                                                      \
    if ((len1) == (len2)) {                                                                           \
      for (; i < (len2) && i >= 0; i += step, (out) += 1) {                                        \
@@ -53,8 +53,8 @@
 #define ARRAY_LIST_OP_REM(left, right, _left_type, _right_type, len1, len2, out, op, _res_type, _ord) \
  {                                                                                                   \
-    int32_t i = (_ord == TSQL_SO_ASC) ? 0 : MAX(len1, len2) - 1;                                      \
+    int32_t i = (_ord == TSDB_ORDER_ASC) ? 0 : MAX(len1, len2) - 1;                                      \
-    int32_t step = (_ord == TSQL_SO_ASC) ? 1 : -1;                                                    \
+    int32_t step = (_ord == TSDB_ORDER_ASC) ? 1 : -1;                                                    \
                                                                                                      \
    if (len1 == (len2)) {                                                                             \
      for (; i >= 0 && i < (len2); i += step, (out) += 1) {                                        \
@@ -107,8 +107,8 @@ void calc_fn_i32_i32_add(void *left, void *right, int32_t numLeft, int32_t numRi
  int32_t *pRight = (int32_t *)right;
  double * pOutput = (double *)output;
-  int32_t i = (order == TSQL_SO_ASC) ? 0 : MAX(numLeft, numRight) - 1;
+  int32_t i = (order == TSDB_ORDER_ASC) ? 0 : MAX(numLeft, numRight) - 1;
-  int32_t step = (order == TSQL_SO_ASC) ? 1 : -1;
+  int32_t step = (order == TSDB_ORDER_ASC) ? 1 : -1;
  if (numLeft == numRight) {
    for (; i >= 0 && i < numRight; i += step, pOutput += 1) {
@@ -305,8 +305,8 @@ void calc_fn_i32_i32_sub(void *left, void *right, int32_t numLeft, int32_t numRi
  int32_t *pRight = (int32_t *)right;
  double * pOutput = (double *)output;
-  int32_t i = (order == TSQL_SO_ASC) ? 0 : MAX(numLeft, numRight) - 1;
+  int32_t i = (order == TSDB_ORDER_ASC) ? 0 : MAX(numLeft, numRight) - 1;
-  int32_t step = (order == TSQL_SO_ASC) ? 1 : -1;
+  int32_t step = (order == TSDB_ORDER_ASC) ? 1 : -1;
  if (numLeft == numRight) {
    for (; i >= 0 && i < numRight; i += step, pOutput += 1) {
@@ -516,8 +516,8 @@ void calc_fn_i32_i32_multi(void *left, void *right, int32_t numLeft, int32_t num
  int32_t *pRight = (int32_t *)right;
  double * pOutput = (double *)output;
-  int32_t i = (order == TSQL_SO_ASC) ? 0 : MAX(numLeft, numRight) - 1;
+  int32_t i = (order == TSDB_ORDER_ASC) ? 0 : MAX(numLeft, numRight) - 1;
-  int32_t step = (order == TSQL_SO_ASC) ? 1 : -1;
+  int32_t step = (order == TSDB_ORDER_ASC) ? 1 : -1;
  if (numLeft == numRight) {
    for (; i >= 0 && i < numRight; i += step, pOutput += 1) {
@@ -714,8 +714,8 @@ void calc_fn_i32_i32_div(void *left, void *right, int32_t numLeft, int32_t numRi
  int32_t *pRight = (int32_t *)right;
  double * pOutput = (double *)output;
-  int32_t i = (order == TSQL_SO_ASC) ? 0 : MAX(numLeft, numRight) - 1;
+  int32_t i = (order == TSDB_ORDER_ASC) ? 0 : MAX(numLeft, numRight) - 1;
-  int32_t step = (order == TSQL_SO_ASC) ? 1 : -1;
+  int32_t step = (order == TSDB_ORDER_ASC) ? 1 : -1;
  if (numLeft == numRight) {
    for (; i >= 0 && i < numRight; i += step, pOutput += 1) {
@@ -928,8 +928,8 @@ void calc_fn_i32_i32_rem(void *left, void *right, int32_t numLeft, int32_t numRi
  int32_t *pRight = (int32_t *)right;
  double * pOutput = (double *)output;
-  int32_t i = (order == TSQL_SO_ASC) ? 0 : MAX(numLeft, numRight) - 1;
+  int32_t i = (order == TSDB_ORDER_ASC) ? 0 : MAX(numLeft, numRight) - 1;
-  int32_t step = (order == TSQL_SO_ASC) ? 1 : -1;
+  int32_t step = (order == TSDB_ORDER_ASC) ? 1 : -1;
  if (numLeft == numRight) {
    for (; i >= 0 && i < numRight; i += step, pOutput += 1) {
@@ -986,8 +986,8 @@ void calc_fn_i32_d_rem(void *left, void *right, int32_t numLeft, int32_t numRigh
  double * pRight = (double *)right;
  double * pOutput = (double *)output;
-  int32_t i = (order == TSQL_SO_ASC) ? 0 : MAX(numLeft, numRight) - 1;
+  int32_t i = (order == TSDB_ORDER_ASC) ? 0 : MAX(numLeft, numRight) - 1;
-  int32_t step = (order == TSQL_SO_ASC) ? 1 : -1;
+  int32_t step = (order == TSDB_ORDER_ASC) ? 1 : -1;
  if (numLeft == numRight) {
    for (; i >= 0 && i < numRight; i += step, pOutput += 1) {

--- a/src/query/src/qtsbuf.c
+++ b/src/query/src/qtsbuf.c
@@ -33,11 +33,11 @@ STSBuf* tsBufCreate(bool autoDelete) {
  }
  // update the header info
-  STSBufFileHeader header = {.magic = TS_COMP_FILE_MAGIC, .numOfVnode = pTSBuf->numOfVnodes, .tsOrder = TSQL_SO_ASC};
+  STSBufFileHeader header = {.magic = TS_COMP_FILE_MAGIC, .numOfVnode = pTSBuf->numOfVnodes, .tsOrder = TSDB_ORDER_ASC};
  STSBufUpdateHeader(pTSBuf, &header);
  tsBufResetPos(pTSBuf);
-  pTSBuf->cur.order = TSQL_SO_ASC;
+  pTSBuf->cur.order = TSDB_ORDER_ASC;
  pTSBuf->autoDelete = autoDelete;
  pTSBuf->tsOrder = -1;
@@ -88,7 +88,7 @@ STSBuf* tsBufCreateFromFile(const char* path, bool autoDelete) {
  // check the ts order
  pTSBuf->tsOrder = header.tsOrder;
-  if (pTSBuf->tsOrder != TSQL_SO_ASC && pTSBuf->tsOrder != TSQL_SO_DESC) {
+  if (pTSBuf->tsOrder != TSDB_ORDER_ASC && pTSBuf->tsOrder != TSDB_ORDER_DESC) {
 //    tscError("invalid order info in buf:%d", pTSBuf->tsOrder);
    tsBufDestory(pTSBuf);
    return NULL;
@@ -118,7 +118,7 @@ STSBuf* tsBufCreateFromFile(const char* path, bool autoDelete) {
  tsBufResetPos(pTSBuf);
  // ascending by default
-  pTSBuf->cur.order = TSQL_SO_ASC;
+  pTSBuf->cur.order = TSDB_ORDER_ASC;
  pTSBuf->autoDelete = autoDelete;
@@ -274,7 +274,7 @@ STSBlock* readDataFromDisk(STSBuf* pTSBuf, int32_t order, bool decomp) {
  memset(pBlock, 0, sizeof(STSBlock));
  pBlock->payload = tmp;
-  if (order == TSQL_SO_DESC) {
+  if (order == TSDB_ORDER_DESC) {
    /*
     * set the right position for the reversed traverse, the reversed traverse is started from
     * the end of each comp data block
@@ -303,7 +303,7 @@ STSBlock* readDataFromDisk(STSBuf* pTSBuf, int32_t order, bool decomp) {
  fread(&pBlock->padding, sizeof(pBlock->padding), 1, pTSBuf->f);
  // for backwards traverse, set the start position at the end of previous block
-  if (order == TSQL_SO_DESC) {
+  if (order == TSDB_ORDER_DESC) {
    int32_t offset = pBlock->compLen + sizeof(pBlock->compLen) * 2 + sizeof(pBlock->numOfElem) + sizeof(pBlock->tag);
    int64_t r = fseek(pTSBuf->f, -offset, SEEK_CUR);
    UNUSED(r);
@@ -321,9 +321,9 @@ static int32_t setCheckTSOrder(STSBuf* pTSBuf, const char* pData, int32_t len) {
      TSKEY lastKey = *(TSKEY*)(ptsData->rawBuf + ptsData->len - TSDB_KEYSIZE);
      if (lastKey > *(TSKEY*)pData) {
-        pTSBuf->tsOrder = TSQL_SO_DESC;
+        pTSBuf->tsOrder = TSDB_ORDER_DESC;
      } else {
-        pTSBuf->tsOrder = TSQL_SO_ASC;
+        pTSBuf->tsOrder = TSDB_ORDER_ASC;
      }
    } else if (len > TSDB_KEYSIZE) {
      // no data in current vnode, more than one ts is added, check the orders
@@ -331,9 +331,9 @@ static int32_t setCheckTSOrder(STSBuf* pTSBuf, const char* pData, int32_t len) {
      TSKEY k2 = *(TSKEY*)(pData + TSDB_KEYSIZE);
      if (k1 < k2) {
-        pTSBuf->tsOrder = TSQL_SO_ASC;
+        pTSBuf->tsOrder = TSDB_ORDER_ASC;
      } else if (k1 > k2) {
-        pTSBuf->tsOrder = TSQL_SO_DESC;
+        pTSBuf->tsOrder = TSDB_ORDER_DESC;
      } else {
        // todo handle error
      }
@@ -432,13 +432,13 @@ static int32_t tsBufFindBlock(STSBuf* pTSBuf, STSVnodeBlockInfo* pBlockInfo, int
  bool    decomp = false;
  while ((i++) <= blockIndex) {
-    if (readDataFromDisk(pTSBuf, TSQL_SO_ASC, decomp) == NULL) {
+    if (readDataFromDisk(pTSBuf, TSDB_ORDER_ASC, decomp) == NULL) {
      return -1;
    }
  }
  // set the file position to be the end of previous comp block
-  if (pTSBuf->cur.order == TSQL_SO_DESC) {
+  if (pTSBuf->cur.order == TSDB_ORDER_DESC) {
    STSBlock* pBlock = &pTSBuf->block;
    int32_t   compBlockSize =
        pBlock->compLen + sizeof(pBlock->compLen) * 2 + sizeof(pBlock->numOfElem) + sizeof(pBlock->tag);
@@ -452,7 +452,7 @@ static int32_t tsBufFindBlockByTag(STSBuf* pTSBuf, STSVnodeBlockInfo* pBlockInfo
  bool decomp = false;
  int64_t offset = 0;
-  if (pTSBuf->cur.order == TSQL_SO_ASC) {
+  if (pTSBuf->cur.order == TSDB_ORDER_ASC) {
    offset = pBlockInfo->offset;
  } else {  // reversed traverse starts from the end of block
    offset = pBlockInfo->offset + pBlockInfo->compLen;
@@ -482,8 +482,8 @@ static void tsBufGetBlock(STSBuf* pTSBuf, int32_t vnodeIndex, int32_t blockIndex
  }
  STSCursor* pCur = &pTSBuf->cur;
-  if (pCur->vnodeIndex == vnodeIndex && ((pCur->blockIndex <= blockIndex && pCur->order == TSQL_SO_ASC) ||
+  if (pCur->vnodeIndex == vnodeIndex && ((pCur->blockIndex <= blockIndex && pCur->order == TSDB_ORDER_ASC) ||
-      (pCur->blockIndex >= blockIndex && pCur->order == TSQL_SO_DESC))) {
+      (pCur->blockIndex >= blockIndex && pCur->order == TSDB_ORDER_DESC))) {
    int32_t i = 0;
    bool    decomp = false;
    int32_t step = abs(blockIndex - pCur->blockIndex);
@@ -520,7 +520,7 @@ static void tsBufGetBlock(STSBuf* pTSBuf, int32_t vnodeIndex, int32_t blockIndex
  pCur->vnodeIndex = vnodeIndex;
  pCur->blockIndex = blockIndex;
-  pCur->tsIndex = (pCur->order == TSQL_SO_ASC) ? 0 : pBlock->numOfElem - 1;
+  pCur->tsIndex = (pCur->order == TSDB_ORDER_ASC) ? 0 : pBlock->numOfElem - 1;
 }
 STSVnodeBlockInfo* tsBufGetVnodeBlockInfo(STSBuf* pTSBuf, int32_t vnodeId) {
@@ -555,7 +555,7 @@ bool tsBufNextPos(STSBuf* pTSBuf) {
  // get the first/last position according to traverse order
  if (pCur->vnodeIndex == -1) {
-    if (pCur->order == TSQL_SO_ASC) {
+    if (pCur->order == TSDB_ORDER_ASC) {
      tsBufGetBlock(pTSBuf, 0, 0);
      if (pTSBuf->block.numOfElem == 0) {  // the whole list is empty, return
@@ -587,20 +587,20 @@ bool tsBufNextPos(STSBuf* pTSBuf) {
    }
  }
-  int32_t step = pCur->order == TSQL_SO_ASC ? 1 : -1;
+  int32_t step = pCur->order == TSDB_ORDER_ASC ? 1 : -1;
  while (1) {
    assert(pTSBuf->tsData.len == pTSBuf->block.numOfElem * TSDB_KEYSIZE);
-    if ((pCur->order == TSQL_SO_ASC && pCur->tsIndex >= pTSBuf->block.numOfElem - 1) ||
+    if ((pCur->order == TSDB_ORDER_ASC && pCur->tsIndex >= pTSBuf->block.numOfElem - 1) ||
-        (pCur->order == TSQL_SO_DESC && pCur->tsIndex <= 0)) {
+        (pCur->order == TSDB_ORDER_DESC && pCur->tsIndex <= 0)) {
      int32_t vnodeId = pTSBuf->pData[pCur->vnodeIndex].info.vnode;
      STSVnodeBlockInfo* pBlockInfo = tsBufGetVnodeBlockInfo(pTSBuf, vnodeId);
-      if (pBlockInfo == NULL || (pCur->blockIndex >= pBlockInfo->numOfBlocks - 1 && pCur->order == TSQL_SO_ASC) ||
+      if (pBlockInfo == NULL || (pCur->blockIndex >= pBlockInfo->numOfBlocks - 1 && pCur->order == TSDB_ORDER_ASC) ||
-          (pCur->blockIndex <= 0 && pCur->order == TSQL_SO_DESC)) {
+          (pCur->blockIndex <= 0 && pCur->order == TSDB_ORDER_DESC)) {
-        if ((pCur->vnodeIndex >= pTSBuf->numOfVnodes - 1 && pCur->order == TSQL_SO_ASC) ||
+        if ((pCur->vnodeIndex >= pTSBuf->numOfVnodes - 1 && pCur->order == TSDB_ORDER_ASC) ||
-            (pCur->vnodeIndex <= 0 && pCur->order == TSQL_SO_DESC)) {
+            (pCur->vnodeIndex <= 0 && pCur->order == TSDB_ORDER_DESC)) {
          pCur->vnodeIndex = -1;
          return false;
        }
@@ -609,7 +609,7 @@ bool tsBufNextPos(STSBuf* pTSBuf) {
          return false;
        }
-        int32_t blockIndex = pCur->order == TSQL_SO_ASC ? 0 : pBlockInfo->numOfBlocks - 1;
+        int32_t blockIndex = pCur->order == TSDB_ORDER_ASC ? 0 : pBlockInfo->numOfBlocks - 1;
        tsBufGetBlock(pTSBuf, pCur->vnodeIndex + step, blockIndex);
        break;
@@ -766,7 +766,7 @@ STSBuf* tsBufCreateFromCompBlocks(const char* pData, int32_t numOfBlocks, int32_
  pTSBuf->fileSize += len;
  pTSBuf->tsOrder = order;
-  assert(order == TSQL_SO_ASC || order == TSQL_SO_DESC);
+  assert(order == TSDB_ORDER_ASC || order == TSDB_ORDER_DESC);
  STSBufFileHeader header = {
      .magic = TS_COMP_FILE_MAGIC, .numOfVnode = pTSBuf->numOfVnodes, .tsOrder = pTSBuf->tsOrder};
@@ -850,7 +850,7 @@ void tsBufDisplay(STSBuf* pTSBuf) {
  printf("number of vnode:%d\n", pTSBuf->numOfVnodes);
  int32_t old = pTSBuf->cur.order;
-  pTSBuf->cur.order = TSQL_SO_ASC;
+  pTSBuf->cur.order = TSDB_ORDER_ASC;
  tsBufResetPos(pTSBuf);

--- a/src/query/src/queryExecutor.c
+++ b/src/query/src/queryExecutor.c
@@ -53,9 +53,9 @@
 /* get the qinfo struct address from the query struct address */
 #define GET_COLUMN_BYTES(query, colidx) \
-  ((query)->colList[(query)->pSelectExpr[colidx].pBase.colInfo.colIdx].info.bytes)
+  ((query)->colList[(query)->pSelectExpr[colidx].pBase.colInfo.colIndex].info.bytes)
 #define GET_COLUMN_TYPE(query, colidx) \
-  ((query)->colList[(query)->pSelectExpr[colidx].pBase.colInfo.colIdx].info.type)
+  ((query)->colList[(query)->pSelectExpr[colidx].pBase.colInfo.colIndex].info.type)
 typedef struct SPointInterpoSupporter {
  int32_t numOfCols;
@@ -280,6 +280,7 @@ int64_t getNumOfResult(SQueryRuntimeEnv *pRuntimeEnv) {
    }
  }
+  assert(maxOutput >= 0);
  return maxOutput;
 }
@@ -294,13 +295,13 @@ bool isGroupbyNormalCol(SSqlGroupbyExpr *pGroupbyExpr) {
  }
  for (int32_t i = 0; i < pGroupbyExpr->numOfGroupCols; ++i) {
-    SColIndexEx *pColIndex = &pGroupbyExpr->columnInfo[i];
+    SColIndex *pColIndex = &pGroupbyExpr->columnInfo[i];
    if (pColIndex->flag == TSDB_COL_NORMAL) {
      /*
       * make sure the normal column locates at the second position if tbname exists in group by clause
       */
      if (pGroupbyExpr->numOfGroupCols > 1) {
-        assert(pColIndex->colIdx > 0);
+        assert(pColIndex->colIndex > 0);
      }
      return true;
@@ -317,7 +318,7 @@ int16_t getGroupbyColumnType(SQuery *pQuery, SSqlGroupbyExpr *pGroupbyExpr) {
  int16_t type = TSDB_DATA_TYPE_NULL;
  for (int32_t i = 0; i < pGroupbyExpr->numOfGroupCols; ++i) {
-    SColIndexEx *pColIndex = &pGroupbyExpr->columnInfo[i];
+    SColIndex *pColIndex = &pGroupbyExpr->columnInfo[i];
    if (pColIndex->flag == TSDB_COL_NORMAL) {
      colId = pColIndex->colId;
      break;
@@ -362,8 +363,8 @@ bool isTSCompQuery(SQuery *pQuery) { return pQuery->pSelectExpr[0].pBase.functio
 bool doRevisedResultsByLimit(SQInfo *pQInfo) {
  SQuery *pQuery = pQInfo->runtimeEnv.pQuery;
-  if ((pQuery->limit.limit > 0) && (pQuery->rec.size + pQuery->rec.size > pQuery->limit.limit)) {
+  if ((pQuery->limit.limit > 0) && (pQuery->rec.rows + pQuery->rec.rows > pQuery->limit.limit)) {
-    pQuery->rec.size = pQuery->limit.limit - pQuery->rec.size;
+    pQuery->rec.rows = pQuery->limit.limit - pQuery->rec.rows;
    // query completed
    setQueryStatus(pQuery, QUERY_COMPLETED);
@@ -390,7 +391,7 @@ static bool isTopBottomQuery(SQuery *pQuery) {
 static SDataStatis *getStatisInfo(SQuery *pQuery, SDataStatis *pStatis, SDataBlockInfo *pDataBlockInfo, int32_t index) {
  // for a tag column, no corresponding field info
-  SColIndexEx *pColIndexEx = &pQuery->pSelectExpr[index].pBase.colInfo;
+  SColIndex *pColIndexEx = &pQuery->pSelectExpr[index].pBase.colInfo;
  if (TSDB_COL_IS_TAG(pColIndexEx->flag)) {
    return NULL;
  }
@@ -418,7 +419,7 @@ static SDataStatis *getStatisInfo(SQuery *pQuery, SDataStatis *pStatis, SDataBlo
 */
 static bool hasNullValue(SQuery *pQuery, int32_t col, SDataBlockInfo *pDataBlockInfo, SDataStatis *pStatis,
                         SDataStatis **pColStatis) {
-  SColIndexEx* pColIndex = &pQuery->pSelectExpr[col].pBase.colInfo;
+  SColIndex* pColIndex = &pQuery->pSelectExpr[col].pBase.colInfo;
  if (TSDB_COL_IS_TAG(pColIndex->flag)) {
    return false;
  }
@@ -593,7 +594,7 @@ static int32_t getForwardStepsInBlock(int32_t numOfPoints, __block_search_fn_t s
  int32_t forwardStep = 0;
  if (endPos >= 0) {
-    forwardStep = (order == TSQL_SO_ASC) ? (endPos - pos) : (pos - endPos);
+    forwardStep = (order == TSDB_ORDER_ASC) ? (endPos - pos) : (pos - endPos);
    assert(forwardStep >= 0);
    // endPos data is equalled to the key so, we do need to read the element in endPos
@@ -670,7 +671,7 @@ static void doCheckQueryCompleted(SQueryRuntimeEnv *pRuntimeEnv, TSKEY lastKey,
 static int32_t getNumOfRowsInTimeWindow(SQuery *pQuery, SDataBlockInfo *pDataBlockInfo, TSKEY *pPrimaryColumn,
                                        int32_t startPos, TSKEY ekey, __block_search_fn_t searchFn,
                                        bool updateLastKey) {
-  assert(startPos >= 0 && startPos < pDataBlockInfo->size);
+  assert(startPos >= 0 && startPos < pDataBlockInfo->rows);
  int32_t num = -1;
  int32_t order = pQuery->order.order;
@@ -679,7 +680,7 @@ static int32_t getNumOfRowsInTimeWindow(SQuery *pQuery, SDataBlockInfo *pDataBlo
  if (QUERY_IS_ASC_QUERY(pQuery)) {
    if (ekey < pDataBlockInfo->window.ekey) {
-      num = getForwardStepsInBlock(pDataBlockInfo->size, searchFn, ekey, startPos, order, pPrimaryColumn);
+      num = getForwardStepsInBlock(pDataBlockInfo->rows, searchFn, ekey, startPos, order, pPrimaryColumn);
      if (num == 0) {  // no qualified data in current block, do not update the lastKey value
        assert(ekey < pPrimaryColumn[startPos]);
      } else {
@@ -688,14 +689,14 @@ static int32_t getNumOfRowsInTimeWindow(SQuery *pQuery, SDataBlockInfo *pDataBlo
        }
      }
    } else {
-      num = pDataBlockInfo->size - startPos;
+      num = pDataBlockInfo->rows - startPos;
      if (updateLastKey) {
        pQuery->lastKey = pDataBlockInfo->window.ekey + step;
      }
    }
  } else {  // desc
    if (ekey > pDataBlockInfo->window.skey) {
-      num = getForwardStepsInBlock(pDataBlockInfo->size, searchFn, ekey, startPos, order, pPrimaryColumn);
+      num = getForwardStepsInBlock(pDataBlockInfo->rows, searchFn, ekey, startPos, order, pPrimaryColumn);
      if (num == 0) {  // no qualified data in current block, do not update the lastKey value
        assert(ekey > pPrimaryColumn[startPos]);
      } else {
@@ -788,7 +789,7 @@ static int32_t getNextQualifiedWindow(SQueryRuntimeEnv *pRuntimeEnv, STimeWindow
      }
    }
-    int32_t startPos = searchFn((char *)primaryKeys, pDataBlockInfo->size, startKey, pQuery->order.order);
+    int32_t startPos = searchFn((char *)primaryKeys, pDataBlockInfo->rows, startKey, pQuery->order.order);
    /*
     * This time window does not cover any data, try next time window,
@@ -851,12 +852,12 @@ char *getDataBlocks(SQueryRuntimeEnv *pRuntimeEnv, SArithmeticSupport *sas, int3
    sas->numOfCols = pQuery->numOfCols;
    sas->offset = 0;
  } else {  // other type of query function
-    SColIndexEx *pCol = &pQuery->pSelectExpr[col].pBase.colInfo;
+    SColIndex *pCol = &pQuery->pSelectExpr[col].pBase.colInfo;
    if (TSDB_COL_IS_TAG(pCol->flag)) {
      dataBlock = NULL;
    } else {
      /*
-       *  the colIdx is acquired from the first meter of all qualified meters in this vnode during query prepare stage,
+       *  the colIndex is acquired from the first meter of all qualified meters in this vnode during query prepare stage,
       *  the remain meter may not have the required column in cache actually.
       *  So, the validation of required column in cache with the corresponding meter schema is reinforced.
       */
@@ -888,7 +889,7 @@ char *getDataBlocks(SQueryRuntimeEnv *pRuntimeEnv, SArithmeticSupport *sas, int3
 * @return                  the incremental number of output value, so it maybe 0 for fixed number of query,
 *                          such as count/min/max etc.
 */
-static int32_t blockwiseApplyAllFunctions(SQueryRuntimeEnv *pRuntimeEnv, SDataStatis *pStatis,
+static void blockwiseApplyAllFunctions(SQueryRuntimeEnv *pRuntimeEnv, SDataStatis *pStatis,
                                          SDataBlockInfo *pDataBlockInfo, SWindowResInfo *pWindowResInfo,
                                          __block_search_fn_t searchFn, SArray *pDataBlock) {
  SQLFunctionCtx *pCtx = pRuntimeEnv->pCtx;
@@ -902,9 +903,7 @@ static int32_t blockwiseApplyAllFunctions(SQueryRuntimeEnv *pRuntimeEnv, SDataSt
    primaryKeyCol = (TSKEY *)(pColInfo->pData);
  }
-  pQuery->pos = QUERY_IS_ASC_QUERY(pQuery) ? 0 : pDataBlockInfo->size - 1;
+  pQuery->pos = QUERY_IS_ASC_QUERY(pQuery) ? 0 : pDataBlockInfo->rows - 1;
-  int64_t prevNumOfRes = getNumOfResult(pRuntimeEnv);
  SArithmeticSupport *sasArray = calloc((size_t)pQuery->numOfOutputCols, sizeof(SArithmeticSupport));
  for (int32_t k = 0; k < pQuery->numOfOutputCols; ++k) {
@@ -913,9 +912,9 @@ static int32_t blockwiseApplyAllFunctions(SQueryRuntimeEnv *pRuntimeEnv, SDataSt
    SDataStatis *tpField = NULL;
    bool hasNull = hasNullValue(pQuery, k, pDataBlockInfo, pStatis, &tpField);
-    char *dataBlock = getDataBlocks(pRuntimeEnv, &sasArray[k], k, pDataBlockInfo->size, pDataBlock);
+    char *dataBlock = getDataBlocks(pRuntimeEnv, &sasArray[k], k, pDataBlockInfo->rows, pDataBlock);
-    setExecParams(pQuery, &pCtx[k], dataBlock, primaryKeyCol, pDataBlockInfo->size, functionId, tpField,
+    setExecParams(pQuery, &pCtx[k], dataBlock, primaryKeyCol, pDataBlockInfo->rows, functionId, tpField,
                  hasNull, &sasArray[k], pRuntimeEnv->scanFlag);
  }
@@ -925,11 +924,9 @@ static int32_t blockwiseApplyAllFunctions(SQueryRuntimeEnv *pRuntimeEnv, SDataSt
    TSKEY   ts = primaryKeyCol[offset];
    STimeWindow win = getActiveTimeWindow(pWindowResInfo, ts, pQuery);
-    assert(0);
+    if (setWindowOutputBufByKey(pRuntimeEnv, pWindowResInfo, pDataBlockInfo->sid, &win) != TSDB_CODE_SUCCESS) {
-    //    if (setWindowOutputBufByKey(pRuntimeEnv, pWindowResInfo, pRuntimeEnv->pTabObj->sid, &win) !=
+      return 0;
-    //    TSDB_CODE_SUCCESS) {
+    }
-    //      return 0;
-    //    }
    TSKEY   ekey = reviseWindowEkey(pQuery, &win);
    int32_t forwardStep =
@@ -949,10 +946,7 @@ static int32_t blockwiseApplyAllFunctions(SQueryRuntimeEnv *pRuntimeEnv, SDataSt
      }
      // null data, failed to allocate more memory buffer
-      //      int32_t sid = pRuntimeEnv->pTabObj->sid;
+      if (setWindowOutputBufByKey(pRuntimeEnv, pWindowResInfo, pDataBlockInfo->sid, &nextWin) != TSDB_CODE_SUCCESS) {
-      int32_t sid = 0;
-      assert(0);
-      if (setWindowOutputBufByKey(pRuntimeEnv, pWindowResInfo, sid, &nextWin) != TSDB_CODE_SUCCESS) {
        break;
      }
@@ -960,7 +954,6 @@ static int32_t blockwiseApplyAllFunctions(SQueryRuntimeEnv *pRuntimeEnv, SDataSt
      forwardStep = getNumOfRowsInTimeWindow(pQuery, pDataBlockInfo, primaryKeyCol, startPos, ekey, searchFn, true);
      pStatus = getTimeWindowResStatus(pWindowResInfo, curTimeWindow(pWindowResInfo));
      doBlockwiseApplyFunctions(pRuntimeEnv, pStatus, &nextWin, startPos, forwardStep, primaryKeyCol);
    }
@@ -979,17 +972,7 @@ static int32_t blockwiseApplyAllFunctions(SQueryRuntimeEnv *pRuntimeEnv, SDataSt
    }
  }
-  /*
-   * No need to calculate the number of output results for group-by normal columns, interval query
-   * because the results of group by normal column is put into intermediate buffer.
-   */
-  int32_t num = 0;
-  if (!isIntervalQuery(pQuery)) {
-    num = getNumOfResult(pRuntimeEnv) - prevNumOfRes;
-  }
  tfree(sasArray);
-  return (int32_t)num;
 }
 static int32_t setGroupResultOutputBuf(SQueryRuntimeEnv *pRuntimeEnv, char *pData, int16_t type, int16_t bytes) {
@@ -1138,9 +1121,9 @@ static int32_t rowwiseApplyAllFunctions(SQueryRuntimeEnv *pRuntimeEnv, SDataStat
    SDataStatis *pColStatis = NULL;
    bool  hasNull = hasNullValue(pQuery, k, pDataBlockInfo, pStatis, &pColStatis);
-    char *dataBlock = getDataBlocks(pRuntimeEnv, &sasArray[k], k, pDataBlockInfo->size, pDataBlock);
+    char *dataBlock = getDataBlocks(pRuntimeEnv, &sasArray[k], k, pDataBlockInfo->rows, pDataBlock);
-    setExecParams(pQuery, &pCtx[k], dataBlock, primaryKeyCol, pDataBlockInfo->size, functionId, pColStatis,
+    setExecParams(pQuery, &pCtx[k], dataBlock, primaryKeyCol, pDataBlockInfo->rows, functionId, pColStatis,
                  hasNull, &sasArray[k], pRuntimeEnv->scanFlag);
  }
@@ -1162,14 +1145,14 @@ static int32_t rowwiseApplyAllFunctions(SQueryRuntimeEnv *pRuntimeEnv, SDataStat
  // from bottom to top in asc order
  if (pRuntimeEnv->pTSBuf != NULL) {
    SQInfo *pQInfo = (SQInfo *)GET_QINFO_ADDR(pQuery);
-    qTrace("QInfo:%p process data rows, numOfRows:%d, query order:%d, ts comp order:%d", pQInfo, pDataBlockInfo->size,
+    qTrace("QInfo:%p process data rows, numOfRows:%d, query order:%d, ts comp order:%d", pQInfo, pDataBlockInfo->rows,
           pQuery->order.order, pRuntimeEnv->pTSBuf->cur.order);
  }
  int32_t j = 0;
  TSKEY   lastKey = -1;
-  for (j = 0; j < pDataBlockInfo->size; ++j) {
+  for (j = 0; j < pDataBlockInfo->rows; ++j) {
    int32_t offset = GET_COL_DATA_POS(pQuery, j, step);
    if (pRuntimeEnv->pTSBuf != NULL) {
@@ -1271,7 +1254,7 @@ static int32_t rowwiseApplyAllFunctions(SQueryRuntimeEnv *pRuntimeEnv, SDataStat
     * pointsOffset is the maximum available space in result buffer update the actual forward step for query that
     * requires checking buffer during loop
     */
-    if ((pQuery->checkBufferInLoop == 1) && (++numOfRes) >= pQuery->pointsOffset) {
+    if ((pQuery->checkBuffer == 1) && (++numOfRes) >= pQuery->pointsOffset) {
      pQuery->lastKey = lastKey + step;
      assert(0);
      //      *forwardStep = j + 1;
@@ -1297,7 +1280,7 @@ static UNUSED_FUNC int32_t reviseForwardSteps(SQueryRuntimeEnv *pRuntimeEnv, int
  /*
   * 1. If value filter exists, we try all data in current block, and do not set the QUERY_RESBUF_FULL flag.
   *
-   * 2. In case of top/bottom/ts_comp query, the checkBufferInLoop == 1 and pQuery->numOfFilterCols
+   * 2. In case of top/bottom/ts_comp query, the checkBuffer == 1 and pQuery->numOfFilterCols
   * may be 0 or not. We do not check the capacity of output buffer, since the filter function will do it.
   *
   * 3. In handling the query of secondary query of join, tsBuf servers as a ts filter.
@@ -1309,7 +1292,7 @@ static UNUSED_FUNC int32_t reviseForwardSteps(SQueryRuntimeEnv *pRuntimeEnv, int
  }
  // current buffer does not have enough space, try in the next loop
-  if ((pQuery->checkBufferInLoop == 1) && (pQuery->pointsOffset <= forwardStep)) {
+  if ((pQuery->checkBuffer == 1) && (pQuery->pointsOffset <= forwardStep)) {
    forwardStep = pQuery->pointsOffset;
  }
@@ -1317,17 +1300,17 @@ static UNUSED_FUNC int32_t reviseForwardSteps(SQueryRuntimeEnv *pRuntimeEnv, int
 }
 static int32_t tableApplyFunctionsOnBlock(SQueryRuntimeEnv *pRuntimeEnv, SDataBlockInfo *pDataBlockInfo,
-                                          SDataStatis *pStatis, __block_search_fn_t searchFn, int32_t *numOfRes,
+                                          SDataStatis *pStatis, __block_search_fn_t searchFn, SWindowResInfo *pWindowResInfo, SArray *pDataBlock) {
-                                          SWindowResInfo *pWindowResInfo, SArray *pDataBlock) {
  SQuery *pQuery = pRuntimeEnv->pQuery;
  if (pQuery->numOfFilterCols > 0 || pRuntimeEnv->pTSBuf != NULL || isGroupbyNormalCol(pQuery->pGroupbyExpr)) {
-    *numOfRes = rowwiseApplyAllFunctions(pRuntimeEnv, pStatis, pDataBlockInfo, pWindowResInfo, pDataBlock);
+    /*numOfRes = */rowwiseApplyAllFunctions(pRuntimeEnv, pStatis, pDataBlockInfo, pWindowResInfo, pDataBlock);
  } else {
-    *numOfRes = blockwiseApplyAllFunctions(pRuntimeEnv, pStatis, pDataBlockInfo, pWindowResInfo, searchFn, pDataBlock);
+    blockwiseApplyAllFunctions(pRuntimeEnv, pStatis, pDataBlockInfo, pWindowResInfo, searchFn, pDataBlock);
  }
-  TSKEY lastKey = QUERY_IS_ASC_QUERY(pQuery) ? pDataBlockInfo->window.ekey : pDataBlockInfo->window.skey;
+  TSKEY lastKey = QUERY_IS_ASC_QUERY(pQuery)? pDataBlockInfo->window.ekey : pDataBlockInfo->window.skey;
  pQuery->lastKey = lastKey + GET_FORWARD_DIRECTION_FACTOR(pQuery->order.order);
  doCheckQueryCompleted(pRuntimeEnv, lastKey, pWindowResInfo);
@@ -1339,14 +1322,19 @@ static int32_t tableApplyFunctionsOnBlock(SQueryRuntimeEnv *pRuntimeEnv, SDataBl
    setQueryStatus(pQuery, QUERY_COMPLETED);
  }
-  assert(*numOfRes >= 0);
+  int32_t numOfRes = getNumOfResult(pRuntimeEnv);
-  // check if buffer is large enough for accommodating all qualified points
+  // update the number of output result
-  if (*numOfRes > 0 && pQuery->checkBufferInLoop == 1 && ((*numOfRes) >= pQuery->rec.threshold)) {
+  if (numOfRes > 0 && pQuery->checkBuffer == 1) {
+    assert(numOfRes >= pQuery->rec.rows);
+    pQuery->rec.rows = numOfRes;
+    if (numOfRes >= pQuery->rec.threshold) {
      setQueryStatus(pQuery, QUERY_RESBUF_FULL);
    }
+  }
-  return 0;
+  return numOfRes;
 }
 void setExecParams(SQuery *pQuery, SQLFunctionCtx *pCtx, void *inputData, TSKEY *tsCol, int32_t size,
@@ -1450,8 +1438,7 @@ static void setWindowResultInfo(SResultInfo *pResultInfo, SQuery *pQuery, bool i
  }
 }
-static int32_t setupQueryRuntimeEnv(SQueryRuntimeEnv *pRuntimeEnv, SColumnModel *pTagsSchema, int16_t order,
+static int32_t setupQueryRuntimeEnv(SQueryRuntimeEnv *pRuntimeEnv, SColumnModel *pTagsSchema, int16_t order) {
-                                    bool isSTableQuery) {
  dTrace("QInfo:%p setup runtime env", GET_QINFO_ADDR(pRuntimeEnv));
  SQuery *pQuery = pRuntimeEnv->pQuery;
@@ -1465,7 +1452,6 @@ static int32_t setupQueryRuntimeEnv(SQueryRuntimeEnv *pRuntimeEnv, SColumnModel
  pRuntimeEnv->offset[0] = 0;
  for (int32_t i = 0; i < pQuery->numOfOutputCols; ++i) {
    SSqlFuncExprMsg *pSqlFuncMsg = &pQuery->pSelectExpr[i].pBase;
-//    SColIndexEx *    pColIndexEx = &pSqlFuncMsg->colInfo;
    SQLFunctionCtx *pCtx = &pRuntimeEnv->pCtx[i];
    pCtx->inputType = GET_COLUMN_TYPE(pQuery, i);
@@ -1511,10 +1497,10 @@ static int32_t setupQueryRuntimeEnv(SQueryRuntimeEnv *pRuntimeEnv, SColumnModel
  }
  // set the intermediate result output buffer
-  setWindowResultInfo(pRuntimeEnv->resultInfo, pQuery, isSTableQuery);
+  setWindowResultInfo(pRuntimeEnv->resultInfo, pQuery, pRuntimeEnv->stableQuery);
  // if it is group by normal column, do not set output buffer, the output buffer is pResult
-  if (!isGroupbyNormalCol(pQuery->pGroupbyExpr) && !isSTableQuery) {
+  if (!isGroupbyNormalCol(pQuery->pGroupbyExpr) && !pRuntimeEnv->stableQuery) {
    resetCtxOutputBuf(pRuntimeEnv);
  }
@@ -1606,7 +1592,7 @@ bool isFixedOutputQuery(SQuery *pQuery) {
    // ignore the ts_comp function
    if (i == 0 && pExprMsg->functionId == TSDB_FUNC_PRJ && pExprMsg->numOfParams == 1 &&
-        pExprMsg->colInfo.colIdx == PRIMARYKEY_TIMESTAMP_COL_INDEX) {
+        pExprMsg->colInfo.colIndex == PRIMARYKEY_TIMESTAMP_COL_INDEX) {
      continue;
    }
@@ -1683,7 +1669,7 @@ static bool needReverseScan(SQuery *pQuery) {
 }
 /////////////////////////////////////////////////////////////////////////////////////////////
-void doGetAlignedIntervalQueryRangeImpl(SQuery *pQuery, int64_t key, int64_t keyFirst, int64_t keyLast,
+void getAlignQueryTimeWindow(SQuery *pQuery, int64_t key, int64_t keyFirst, int64_t keyLast,
                                        int64_t *realSkey, int64_t *realEkey, STimeWindow *win) {
  assert(key >= keyFirst && key <= keyLast && pQuery->slidingTime <= pQuery->intervalTime);
@@ -1835,9 +1821,9 @@ bool normalizeUnBoundLastRowQuery(SQInfo *pQInfo, SPointInterpoSupporter *pPoint
 static void setScanLimitationByResultBuffer(SQuery *pQuery) {
  if (isTopBottomQuery(pQuery)) {
-    pQuery->checkBufferInLoop = 0;
+    pQuery->checkBuffer = 0;
  } else if (isGroupbyNormalCol(pQuery->pGroupbyExpr)) {
-    pQuery->checkBufferInLoop = 0;
+    pQuery->checkBuffer = 0;
  } else {
    bool hasMultioutput = false;
    for (int32_t i = 0; i < pQuery->numOfOutputCols; ++i) {
@@ -1852,7 +1838,7 @@ static void setScanLimitationByResultBuffer(SQuery *pQuery) {
      }
    }
-    pQuery->checkBufferInLoop = hasMultioutput ? 1 : 0;
+    pQuery->checkBuffer = hasMultioutput ? 1 : 0;
  }
 }
@@ -1902,9 +1888,9 @@ static void changeExecuteScanOrder(SQuery *pQuery, bool metricQuery) {
  // descending order query for last_row query
  if (isFirstLastRowQuery(pQuery)) {
    dTrace("QInfo:%p scan order changed for last_row query, old:%d, new:%d", GET_QINFO_ADDR(pQuery),
-           pQuery->order.order, TSQL_SO_DESC);
+           pQuery->order.order, TSDB_ORDER_DESC);
-    pQuery->order.order = TSQL_SO_DESC;
+    pQuery->order.order = TSDB_ORDER_DESC;
    int64_t skey = MIN(pQuery->window.skey, pQuery->window.ekey);
    int64_t ekey = MAX(pQuery->window.skey, pQuery->window.ekey);
@@ -1917,56 +1903,56 @@ static void changeExecuteScanOrder(SQuery *pQuery, bool metricQuery) {
  if (isPointInterpoQuery(pQuery) && pQuery->intervalTime == 0) {
    if (!QUERY_IS_ASC_QUERY(pQuery)) {
-      dTrace(msg, GET_QINFO_ADDR(pQuery), "interp", pQuery->order.order, TSQL_SO_ASC, pQuery->window.skey,
+      dTrace(msg, GET_QINFO_ADDR(pQuery), "interp", pQuery->order.order, TSDB_ORDER_ASC, pQuery->window.skey,
             pQuery->window.ekey, pQuery->window.ekey, pQuery->window.skey);
      SWAP(pQuery->window.skey, pQuery->window.ekey, TSKEY);
    }
-    pQuery->order.order = TSQL_SO_ASC;
+    pQuery->order.order = TSDB_ORDER_ASC;
    return;
  }
  if (pQuery->intervalTime == 0) {
    if (onlyFirstQuery(pQuery)) {
      if (!QUERY_IS_ASC_QUERY(pQuery)) {
-        dTrace(msg, GET_QINFO_ADDR(pQuery), "only-first", pQuery->order.order, TSQL_SO_ASC, pQuery->window.skey,
+        dTrace(msg, GET_QINFO_ADDR(pQuery), "only-first", pQuery->order.order, TSDB_ORDER_ASC, pQuery->window.skey,
               pQuery->window.ekey, pQuery->window.ekey, pQuery->window.skey);
        SWAP(pQuery->window.skey, pQuery->window.ekey, TSKEY);
      }
-      pQuery->order.order = TSQL_SO_ASC;
+      pQuery->order.order = TSDB_ORDER_ASC;
    } else if (onlyLastQuery(pQuery)) {
      if (QUERY_IS_ASC_QUERY(pQuery)) {
-        dTrace(msg, GET_QINFO_ADDR(pQuery), "only-last", pQuery->order.order, TSQL_SO_DESC, pQuery->window.skey,
+        dTrace(msg, GET_QINFO_ADDR(pQuery), "only-last", pQuery->order.order, TSDB_ORDER_DESC, pQuery->window.skey,
               pQuery->window.ekey, pQuery->window.ekey, pQuery->window.skey);
        SWAP(pQuery->window.skey, pQuery->window.ekey, TSKEY);
      }
-      pQuery->order.order = TSQL_SO_DESC;
+      pQuery->order.order = TSDB_ORDER_DESC;
    }
  } else {  // interval query
    if (metricQuery) {
      if (onlyFirstQuery(pQuery)) {
        if (!QUERY_IS_ASC_QUERY(pQuery)) {
-          dTrace(msg, GET_QINFO_ADDR(pQuery), "only-first stable", pQuery->order.order, TSQL_SO_ASC,
+          dTrace(msg, GET_QINFO_ADDR(pQuery), "only-first stable", pQuery->order.order, TSDB_ORDER_ASC,
                 pQuery->window.skey, pQuery->window.ekey, pQuery->window.ekey, pQuery->window.skey);
          SWAP(pQuery->window.skey, pQuery->window.ekey, TSKEY);
        }
-        pQuery->order.order = TSQL_SO_ASC;
+        pQuery->order.order = TSDB_ORDER_ASC;
      } else if (onlyLastQuery(pQuery)) {
        if (QUERY_IS_ASC_QUERY(pQuery)) {
-          dTrace(msg, GET_QINFO_ADDR(pQuery), "only-last stable", pQuery->order.order, TSQL_SO_DESC,
+          dTrace(msg, GET_QINFO_ADDR(pQuery), "only-last stable", pQuery->order.order, TSDB_ORDER_DESC,
                 pQuery->window.skey, pQuery->window.ekey, pQuery->window.ekey, pQuery->window.skey);
          SWAP(pQuery->window.skey, pQuery->window.ekey, TSKEY);
        }
-        pQuery->order.order = TSQL_SO_DESC;
+        pQuery->order.order = TSDB_ORDER_DESC;
      }
    }
  }
@@ -2104,8 +2090,7 @@ void pointInterpSupporterSetData(SQInfo *pQInfo, SPointInterpoSupporter *pPointI
          continue;
        }
-        int32_t colInBuf = pQuery->pSelectExpr[i].pBase.colInfo.colIdxInBuf;
+        int32_t colInBuf = 0;//pQuery->pSelectExpr[i].pBase.colInfo.colIdxInBuf;
        SInterpInfo *pInterpInfo = (SInterpInfo *)pRuntimeEnv->pCtx[i].aOutputBuf;
        pInterpInfo->pInterpDetail = calloc(1, sizeof(SInterpInfoDetail));
@@ -2276,12 +2261,12 @@ int32_t vnodeSTableQueryPrepare(SQInfo *pQInfo, SQuery *pQuery, void *param) {
  // set the ts-comp file traverse order
  if (param != NULL) {
-    int16_t order = (pQuery->order.order == pRuntimeEnv->pTSBuf->tsOrder) ? TSQL_SO_ASC : TSQL_SO_DESC;
+    int16_t order = (pQuery->order.order == pRuntimeEnv->pTSBuf->tsOrder) ? TSDB_ORDER_ASC : TSDB_ORDER_DESC;
    tsBufSetTraverseOrder(pRuntimeEnv->pTSBuf, order);
  }
  assert(0);
-  //  int32_t ret = setupQueryRuntimeEnv(pMeter, pQuery, &pQInfo->runtimeEnv, pTagSchemaInfo, TSQL_SO_ASC, true);
+  //  int32_t ret = setupQueryRuntimeEnv(pMeter, pQuery, &pQInfo->runtimeEnv, pTagSchemaInfo, TSDB_ORDER_ASC, true);
  //  if (ret != TSDB_CODE_SUCCESS) {
  //    return ret;
  //  }
@@ -2403,7 +2388,7 @@ static bool needToLoadDataBlock(SQuery *pQuery, SDataStatis *pDataStatis, SQLFun
 #if 0
  for (int32_t k = 0; k < pQuery->numOfFilterCols; ++k) {
    SSingleColumnFilterInfo *pFilterInfo = &pQuery->pFilterInfo[k];
-    int32_t                  colIndex = pFilterInfo->info.colIdx;
+    int32_t                  colIndex = pFilterInfo->info.colIndex;
    // this column not valid in current data block
    if (colIndex < 0 || pDataStatis[colIndex].colId != pFilterInfo->info.data.colId) {
@@ -2481,7 +2466,7 @@ SArray *loadDataBlockOnDemand(SQueryRuntimeEnv *pRuntimeEnv, SDataBlockInfo *pBl
  if (r == BLK_DATA_NO_NEEDED) {
    qTrace("QInfo:%p slot:%d, data block ignored, brange:%" PRId64 "-%" PRId64 ", rows:%d",
-          GET_QINFO_ADDR(pRuntimeEnv), pBlockInfo->window.skey, pBlockInfo->window.ekey, pBlockInfo->size);
+          GET_QINFO_ADDR(pRuntimeEnv), pBlockInfo->window.skey, pBlockInfo->window.ekey, pBlockInfo->rows);
  } else if (r == BLK_DATA_FILEDS_NEEDED) {
    if (tsdbRetrieveDataBlockStatisInfo(pRuntimeEnv->pQueryHandle, pStatis) != TSDB_CODE_SUCCESS) {
      //        return DISK_DATA_LOAD_FAILED;
@@ -2501,7 +2486,7 @@ SArray *loadDataBlockOnDemand(SQueryRuntimeEnv *pRuntimeEnv, SDataBlockInfo *pBl
     * filter the data block according to the value filter condition.
     * no need to load the data block, continue for next block
     */
-    if (!needToLoadDataBlock(pQuery, *pStatis, pRuntimeEnv->pCtx, pBlockInfo->size)) {
+    if (!needToLoadDataBlock(pQuery, *pStatis, pRuntimeEnv->pCtx, pBlockInfo->rows)) {
 #if defined(_DEBUG_VIEW)
      dTrace("QInfo:%p fileId:%d, slot:%d, block discarded by per-filter", GET_QINFO_ADDR(pQuery), pQuery->fileId,
             pQuery->slot);
@@ -2577,8 +2562,6 @@ int32_t binarySearchForKey(char *pValue, int num, TSKEY key, int order) {
 static int64_t doScanAllDataBlocks(SQueryRuntimeEnv *pRuntimeEnv) {
  SQuery *pQuery = pRuntimeEnv->pQuery;
-  int64_t cnt = 0;
  dTrace("QInfo:%p query start, qrange:%" PRId64 "-%" PRId64 ", lastkey:%" PRId64 ", order:%d",
         GET_QINFO_ADDR(pRuntimeEnv), pQuery->window.skey, pQuery->window.ekey, pQuery->lastKey, pQuery->order.order);
@@ -2586,43 +2569,66 @@ static int64_t doScanAllDataBlocks(SQueryRuntimeEnv *pRuntimeEnv) {
  while (tsdbNextDataBlock(pQueryHandle)) {
    // check if query is killed or not set the status of query to pass the status check
    if (isQueryKilled(GET_QINFO_ADDR(pRuntimeEnv))) {
-      return cnt;
+      return 0;
    }
    SDataBlockInfo blockInfo = tsdbRetrieveDataBlockInfo(pQueryHandle);
+    // todo extract methods
    if (isIntervalQuery(pQuery) && pRuntimeEnv->windowResInfo.prevSKey == 0) {
      TSKEY skey1, ekey1;
      STimeWindow w = {0};
      SWindowResInfo *pWindowResInfo = &pRuntimeEnv->windowResInfo;
      if (QUERY_IS_ASC_QUERY(pQuery)) {
-        doGetAlignedIntervalQueryRangeImpl(pQuery, blockInfo.window.skey, blockInfo.window.skey, pQuery->window.ekey,
+        getAlignQueryTimeWindow(pQuery, blockInfo.window.skey, blockInfo.window.skey, pQuery->window.ekey,
                                           &skey1, &ekey1, &w);
        pWindowResInfo->startTime = w.skey;
        pWindowResInfo->prevSKey = w.skey;
      } else {
        // the start position of the first time window in the endpoint that spreads beyond the queried last timestamp
-        TSKEY winStart = blockInfo.window.ekey - pQuery->intervalTime;
+        TSKEY start = blockInfo.window.ekey - pQuery->intervalTime;
-        doGetAlignedIntervalQueryRangeImpl(pQuery, winStart, pQuery->window.ekey, blockInfo.window.ekey, &skey1, &ekey1,
+        getAlignQueryTimeWindow(pQuery, start, pQuery->window.ekey, blockInfo.window.ekey, &skey1, &ekey1, &w);
-                                           &w);
        pWindowResInfo->startTime = pQuery->window.skey;
        pWindowResInfo->prevSKey = w.skey;
      }
    }
-    int32_t numOfRes = 0;
+    // in case of prj/diff query, ensure the output buffer is sufficient to accomodate the results of current block
+    if (!isIntervalQuery(pQuery) && !isGroupbyNormalCol(pQuery->pGroupbyExpr) && !isFixedOutputQuery(pQuery)) {
+      SResultRec* pRec = &pQuery->rec;
+      if (pQuery->rec.capacity - pQuery->rec.rows < blockInfo.rows) {
+        int32_t remain = pRec->capacity - pRec->rows;
+        int32_t newSize = pRec->capacity + (blockInfo.rows - remain);
+        for(int32_t i = 0; i < pQuery->numOfOutputCols; ++i) {
+          int32_t bytes = pQuery->pSelectExpr[i].resBytes;
+          char* tmp = realloc(pQuery->sdata[i], bytes * newSize + sizeof(SData));
+          if (tmp == NULL) { // todo handle the oom
+          } else {
+            pQuery->sdata[i] = (SData*) tmp;
+          }
+          // set the pCtx output buffer position
+          pRuntimeEnv->pCtx[i].aOutputBuf = pQuery->sdata[i]->data + pRec->rows*bytes;
+        }
+        pRec->capacity = newSize;
+      }
+    }
    SDataStatis *pStatis = NULL;
    SArray *pDataBlock = loadDataBlockOnDemand(pRuntimeEnv, &blockInfo, &pStatis);
-    int32_t forwardStep = tableApplyFunctionsOnBlock(pRuntimeEnv, &blockInfo, pStatis, binarySearchForKey, &numOfRes,
+    int32_t numOfRes = tableApplyFunctionsOnBlock(pRuntimeEnv, &blockInfo, pStatis, binarySearchForKey,
                                                     &pRuntimeEnv->windowResInfo, pDataBlock);
-    dTrace("QInfo:%p check data block, brange:%" PRId64 "-%" PRId64 ", rows:%d",
+    dTrace("QInfo:%p check data block, brange:%" PRId64 "-%" PRId64 ", rows:%d, res:%d",
-               GET_QINFO_ADDR(pRuntimeEnv), blockInfo.window.skey, blockInfo.window.ekey, blockInfo.size);
+               GET_QINFO_ADDR(pRuntimeEnv), blockInfo.window.skey, blockInfo.window.ekey, blockInfo.rows, numOfRes);
    // save last access position
-    cnt += forwardStep;
    if (Q_STATUS_EQUAL(pQuery->status, QUERY_RESBUF_FULL)) {
      break;
    }
@@ -2645,7 +2651,7 @@ static int64_t doScanAllDataBlocks(SQueryRuntimeEnv *pRuntimeEnv) {
    }
  }
-  return cnt;
+  return 0;
 }
 static void updatelastkey(SQuery *pQuery, STableQueryInfo *pTableQInfo) { pTableQInfo->lastKey = pQuery->lastKey; }
@@ -2683,19 +2689,19 @@ void vnodeSetTagValueInParam(tSidSet *pSidSet, SQueryRuntimeEnv *pRuntimeEnv, vo
  } else {
    // set tag value, by which the results are aggregated.
    for (int32_t idx = 0; idx < pQuery->numOfOutputCols; ++idx) {
-      SColIndexEx *pColEx = &pQuery->pSelectExpr[idx].pBase.colInfo;
+      SColIndex *pColEx = &pQuery->pSelectExpr[idx].pBase.colInfo;
      // ts_comp column required the tag value for join filter
      if (!TSDB_COL_IS_TAG(pColEx->flag)) {
        continue;
      }
-      doSetTagValueInParam(pTagSchema, pColEx->colIdx, pMeterSidInfo, &pRuntimeEnv->pCtx[idx].tag);
+      doSetTagValueInParam(pTagSchema, pColEx->colIndex, pMeterSidInfo, &pRuntimeEnv->pCtx[idx].tag);
    }
    // set the join tag for first column
    SSqlFuncExprMsg *pFuncMsg = &pQuery->pSelectExpr[0].pBase;
-    if (pFuncMsg->functionId == TSDB_FUNC_TS && pFuncMsg->colInfo.colIdx == PRIMARYKEY_TIMESTAMP_COL_INDEX &&
+    if (pFuncMsg->functionId == TSDB_FUNC_TS && pFuncMsg->colInfo.colIndex == PRIMARYKEY_TIMESTAMP_COL_INDEX &&
        pRuntimeEnv->pTSBuf != NULL) {
      assert(pFuncMsg->numOfParams == 1);
      doSetTagValueInParam(pTagSchema, pFuncMsg->arg->argValue.i64, pMeterSidInfo, &pRuntimeEnv->pCtx[0].tag);
@@ -2822,13 +2828,13 @@ void UNUSED_FUNC displayInterResult(SData **pdata, SQuery *pQuery, int32_t numOf
    for (int32_t i = 0; i < numOfCols; ++i) {
      switch (pQuery->pSelectExpr[i].resType) {
        case TSDB_DATA_TYPE_BINARY: {
-          int32_t colIdx = pQuery->pSelectExpr[i].pBase.colInfo.colIdx;
+          int32_t colIndex = pQuery->pSelectExpr[i].pBase.colInfo.colIndex;
          int32_t type = 0;
          if (TSDB_COL_IS_TAG(pQuery->pSelectExpr[i].pBase.colInfo.flag)) {
            type = pQuery->pSelectExpr[i].resType;
          } else {
-            type = pMeterObj->schema[colIdx].type;
+            type = pMeterObj->schema[colIndex].type;
          }
          printBinaryData(pQuery->pSelectExpr[i].pBase.functionId, pdata[i]->data + pQuery->pSelectExpr[i].resBytes * j,
                          type);
@@ -2979,9 +2985,9 @@ void copyResToQueryResultBuf(SQInfo *pQInfo, SQuery *pQuery) {
    offset += pData->numOfElems;
  }
-  assert(pQuery->rec.size == 0);
+  assert(pQuery->rec.rows == 0);
-  pQuery->rec.size += rows;
+  pQuery->rec.rows += rows;
  pQInfo->offset += 1;
 }
@@ -3207,8 +3213,8 @@ static void doDisableFunctsForSupplementaryScan(SQuery *pQuery, SWindowResInfo *
    for (int32_t j = 0; j < pQuery->numOfOutputCols; ++j) {
      int32_t functId = pQuery->pSelectExpr[j].pBase.functionId;
-      if (((functId == TSDB_FUNC_FIRST || functId == TSDB_FUNC_FIRST_DST) && order == TSQL_SO_DESC) ||
+      if (((functId == TSDB_FUNC_FIRST || functId == TSDB_FUNC_FIRST_DST) && order == TSDB_ORDER_DESC) ||
-          ((functId == TSDB_FUNC_LAST || functId == TSDB_FUNC_LAST_DST) && order == TSQL_SO_ASC)) {
+          ((functId == TSDB_FUNC_LAST || functId == TSDB_FUNC_LAST_DST) && order == TSDB_ORDER_ASC)) {
        buf->resultInfo[j].complete = false;
      } else if (functId != TSDB_FUNC_TS && functId != TSDB_FUNC_TAG) {
        buf->resultInfo[j].complete = true;
@@ -3233,8 +3239,8 @@ void disableFunctForTableSuppleScan(SQueryRuntimeEnv *pRuntimeEnv, int32_t order
      int32_t         functId = pQuery->pSelectExpr[j].pBase.functionId;
      SQLFunctionCtx *pCtx = &pRuntimeEnv->pCtx[j];
-      if (((functId == TSDB_FUNC_FIRST || functId == TSDB_FUNC_FIRST_DST) && order == TSQL_SO_DESC) ||
+      if (((functId == TSDB_FUNC_FIRST || functId == TSDB_FUNC_FIRST_DST) && order == TSDB_ORDER_DESC) ||
-          ((functId == TSDB_FUNC_LAST || functId == TSDB_FUNC_LAST_DST) && order == TSQL_SO_ASC)) {
+          ((functId == TSDB_FUNC_LAST || functId == TSDB_FUNC_LAST_DST) && order == TSDB_ORDER_ASC)) {
        pCtx->resultInfo->complete = false;
      } else if (functId != TSDB_FUNC_TS && functId != TSDB_FUNC_TAG) {
        pCtx->resultInfo->complete = true;
@@ -3310,7 +3316,7 @@ void resetCtxOutputBuf(SQueryRuntimeEnv *pRuntimeEnv) {
      pCtx->ptsOutputBuf = pRuntimeEnv->pCtx[0].aOutputBuf;
    }
-    memset(pQuery->sdata[i]->data, 0, (size_t)pQuery->pSelectExpr[i].resBytes * pQuery->rec.capacity);
+    memset(pQuery->sdata[i]->data, 0, (size_t) pQuery->pSelectExpr[i].resBytes * pQuery->rec.capacity);
  }
  initCtxOutputBuf(pRuntimeEnv);
@@ -3349,22 +3355,22 @@ void initCtxOutputBuf(SQueryRuntimeEnv *pRuntimeEnv) {
  for (int32_t j = 0; j < pQuery->numOfOutputCols; ++j) {
    int32_t functionId = pQuery->pSelectExpr[j].pBase.functionId;
-    pRuntimeEnv->pCtx[j].currentStage = 0;
+    pRuntimeEnv->pCtx[j].currentStage = 0;
    aAggs[functionId].init(&pRuntimeEnv->pCtx[j]);
  }
 }
 void doSkipResults(SQueryRuntimeEnv *pRuntimeEnv) {
  SQuery *pQuery = pRuntimeEnv->pQuery;
-  if (pQuery->rec.size == 0 || pQuery->limit.offset == 0) {
+  if (pQuery->rec.rows == 0 || pQuery->limit.offset == 0) {
    return;
  }
-  if (pQuery->rec.size <= pQuery->limit.offset) {
+  if (pQuery->rec.rows <= pQuery->limit.offset) {
-    pQuery->limit.offset -= pQuery->rec.size;
+    pQuery->limit.offset -= pQuery->rec.rows;
-    pQuery->rec.size = 0;
+    pQuery->rec.rows = 0;
    //    pQuery->pointsOffset = pQuery->rec.pointsToRead;  // clear all data in result buffer
    resetCtxOutputBuf(pRuntimeEnv);
@@ -3373,7 +3379,7 @@ void doSkipResults(SQueryRuntimeEnv *pRuntimeEnv) {
    pQuery->status &= (~QUERY_RESBUF_FULL);
  } else {
    int32_t numOfSkip = (int32_t)pQuery->limit.offset;
-    pQuery->rec.size -= numOfSkip;
+    pQuery->rec.rows -= numOfSkip;
    for (int32_t i = 0; i < pQuery->numOfOutputCols; ++i) {
      int32_t functionId = pQuery->pSelectExpr[i].pBase.functionId;
@@ -3528,6 +3534,7 @@ void scanAllDataBlocks(SQueryRuntimeEnv *pRuntimeEnv) {
    doScanAllDataBlocks(pRuntimeEnv);
    if (!needScanDataBlocksAgain(pRuntimeEnv)) {
      // restore the status
      if (pRuntimeEnv->scanFlag == REPEAT_SCAN) {
        pQuery->status = status;
@@ -3547,7 +3554,6 @@ void scanAllDataBlocks(SQueryRuntimeEnv *pRuntimeEnv) {
    /* check if query is killed or not */
    if (isQueryKilled(GET_QINFO_ADDR(pRuntimeEnv))) {
-//      setQueryStatus(pQuery, QUERY_NO_DATA_TO_CHECK);
      return;
    }
  }
@@ -3678,7 +3684,7 @@ void restoreIntervalQueryRange(SQueryRuntimeEnv *pRuntimeEnv, STableQueryInfo *p
 /**
 * set output buffer for different group
 * @param pRuntimeEnv
- * @param pDataBlockInfoEx
+ * @param pDataBlockInfo
 */
 void setExecutionContext(SQInfo *pQInfo, STableQueryInfo *pTableQueryInfo, int32_t meterIdx, int32_t groupIdx,
                         TSKEY nextKey) {
@@ -3793,7 +3799,7 @@ void setIntervalQueryRange(STableQueryInfo *pTableQueryInfo, SQInfo *pQInfo, TSK
    STimeWindow     w = {0};
    SWindowResInfo *pWindowResInfo = &pTableQueryInfo->windowResInfo;
-    doGetAlignedIntervalQueryRangeImpl(pQuery, win.skey, win.skey, win.ekey, &skey1, &ekey1, &w);
+    getAlignQueryTimeWindow(pQuery, win.skey, win.skey, win.ekey, &skey1, &ekey1, &w);
    pWindowResInfo->startTime = pQuery->window.skey;  // windowSKey may be 0 in case of 1970 timestamp
    if (pWindowResInfo->prevSKey == 0) {
@@ -3863,7 +3869,7 @@ static int32_t doCopyToSData(SQInfo *pQInfo, SWindowResult *result, int32_t orde
  dTrace("QInfo:%p start to copy data from windowResInfo to pQuery buf", GET_QINFO_ADDR(pQuery));
  int32_t totalSubset = getNumOfSubset(pQInfo);
-  if (orderType == TSQL_SO_ASC) {
+  if (orderType == TSDB_ORDER_ASC) {
    startIdx = pQInfo->subgroupIdx;
    step = 1;
  } else {  // desc order copy all data
@@ -3929,12 +3935,12 @@ static int32_t doCopyToSData(SQInfo *pQInfo, SWindowResult *result, int32_t orde
 void copyFromWindowResToSData(SQInfo *pQInfo, SWindowResult *result) {
  SQuery *pQuery = pQInfo->runtimeEnv.pQuery;
-  int32_t orderType = (pQuery->pGroupbyExpr != NULL) ? pQuery->pGroupbyExpr->orderType : TSQL_SO_ASC;
+  int32_t orderType = (pQuery->pGroupbyExpr != NULL) ? pQuery->pGroupbyExpr->orderType : TSDB_ORDER_ASC;
  int32_t numOfResult = doCopyToSData(pQInfo, result, orderType);
-  pQuery->rec.size += numOfResult;
+  pQuery->rec.rows += numOfResult;
-  assert(pQuery->rec.size <= pQuery->rec.capacity);
+  assert(pQuery->rec.rows <= pQuery->rec.capacity);
 }
 static void updateWindowResNumOfRes(SQueryRuntimeEnv *pRuntimeEnv, STableDataInfo *pTableDataInfo) {
@@ -3958,15 +3964,12 @@ void stableApplyFunctionsOnBlock(SQueryRuntimeEnv* pRuntimeEnv, STableDataInfo *
  STableQueryInfo * pTableQueryInfo = pTableDataInfo->pTableQInfo;
  SWindowResInfo *  pWindowResInfo = &pTableQueryInfo->windowResInfo;
-  int32_t numOfRes = 0;
  if (pQuery->numOfFilterCols > 0 || pRuntimeEnv->pTSBuf != NULL) {
    //    numOfRes = rowwiseApplyAllFunctions(pRuntimeEnv, &forwardStep, pFields, pDataBlockInfo, pWindowResInfo);
  } else {
-    numOfRes = blockwiseApplyAllFunctions(pRuntimeEnv, pStatis, pDataBlockInfo, pWindowResInfo, searchFn, pDataBlock);
+    blockwiseApplyAllFunctions(pRuntimeEnv, pStatis, pDataBlockInfo, pWindowResInfo, searchFn, pDataBlock);
  }
-  assert(numOfRes >= 0);
  updateWindowResNumOfRes(pRuntimeEnv, pTableDataInfo);
  updatelastkey(pQuery, pTableQueryInfo);
 }
@@ -3982,7 +3985,7 @@ bool vnodeHasRemainResults(void *handle) {
  SQuery *          pQuery = pRuntimeEnv->pQuery;
  SInterpolationInfo *pInterpoInfo = &pRuntimeEnv->interpoInfo;
-  if (pQuery->limit.limit > 0 && pQuery->rec.size >= pQuery->limit.limit) {
+  if (pQuery->limit.limit > 0 && pQuery->rec.rows >= pQuery->limit.limit) {
    return false;
  }
@@ -4153,7 +4156,7 @@ void vnodePrintQueryStatistics(SQInfo *pQInfo) {
 #endif
 }
-int32_t doInitializeQInfo(SQInfo *pQInfo, void *param, void* tsdb, bool isSTableQuery) {
+int32_t doInitQInfo(SQInfo *pQInfo, void *param, void* tsdb, bool isSTableQuery) {
  SQueryRuntimeEnv *pRuntimeEnv = &pQInfo->runtimeEnv;
  SQuery *pQuery = pQInfo->runtimeEnv.pQuery;
@@ -4182,13 +4185,15 @@ int32_t doInitializeQInfo(SQInfo *pQInfo, void *param, void* tsdb, bool isSTable
  pRuntimeEnv->pQuery = pQuery;
  pRuntimeEnv->pTSBuf = param;
  pRuntimeEnv->cur.vnodeIndex = -1;
+  pRuntimeEnv->stableQuery = isSTableQuery;
  if (param != NULL) {
-    int16_t order = (pQuery->order.order == pRuntimeEnv->pTSBuf->tsOrder) ? TSQL_SO_ASC : TSQL_SO_DESC;
+    int16_t order = (pQuery->order.order == pRuntimeEnv->pTSBuf->tsOrder) ? TSDB_ORDER_ASC : TSDB_ORDER_DESC;
    tsBufSetTraverseOrder(pRuntimeEnv->pTSBuf, order);
  }
  // create runtime environment
-  code = setupQueryRuntimeEnv(pRuntimeEnv, NULL, pQuery->order.order, isSTableQuery);
+  code = setupQueryRuntimeEnv(pRuntimeEnv, NULL, pQuery->order.order);
  if (code != TSDB_CODE_SUCCESS) {
    return code;
  }
@@ -4271,8 +4276,6 @@ int32_t doInitializeQInfo(SQInfo *pQInfo, void *param, void* tsdb, bool isSTable
  // the pQuery->window.skey is changed during normalizedFirstQueryRange, so set the newest lastkey value
  pQuery->lastKey = pQuery->window.skey;
-  pRuntimeEnv->stableQuery = false;
  return TSDB_CODE_SUCCESS;
 }
@@ -4282,7 +4285,7 @@ static UNUSED_FUNC bool isGroupbyEachTable(SSqlGroupbyExpr *pGroupbyExpr, tSidSe
  }
  for (int32_t i = 0; i < pGroupbyExpr->numOfGroupCols; ++i) {
-    SColIndexEx *pColIndex = &pGroupbyExpr->columnInfo[i];
+    SColIndex *pColIndex = &pGroupbyExpr->columnInfo[i];
    if (pColIndex->flag == TSDB_COL_TAG) {
      //      assert(pSidset->numOfTables == pSidset->numOfSubSet);
      return true;
@@ -4455,7 +4458,7 @@ static UNUSED_FUNC int64_t doCheckMetersInGroup(SQInfo *pQInfo, int32_t index, i
  // accumulate the point interpolation result
  if (numOfRes > 0) {
-    pQuery->rec.size += numOfRes;
+    pQuery->rec.rows += numOfRes;
    forwardCtxOutputBuf(pRuntimeEnv, numOfRes);
  }
@@ -4822,13 +4825,13 @@ static void multiTableQueryProcess(SQInfo *pQInfo) {
      copyFromWindowResToSData(pQInfo, pRuntimeEnv->windowResInfo.pResult);
    }
-    pQuery->rec.size += pQuery->rec.size;
+    pQuery->rec.rows += pQuery->rec.rows;
-    if (pQuery->rec.size == 0) {
+    if (pQuery->rec.rows == 0) {
      //      vnodePrintQueryStatistics(pSupporter);
    }
-    dTrace("QInfo:%p current:%lldd, total:%lldd", pQInfo, pQuery->rec.size, pQuery->rec.total);
+    dTrace("QInfo:%p current:%lldd, total:%lldd", pQInfo, pQuery->rec.rows, pQuery->rec.total);
    return;
  }
@@ -4885,7 +4888,7 @@ static void multiTableQueryProcess(SQInfo *pQInfo) {
  }
  // handle the limitation of output buffer
-  dTrace("QInfo:%p points returned:%d, total:%d", pQInfo, pQuery->rec.size, pQuery->rec.total);
+  dTrace("QInfo:%p points returned:%d, total:%d", pQInfo, pQuery->rec.rows, pQuery->rec.total);
 }
 /*
@@ -4906,7 +4909,7 @@ static void tableFixedOutputProcessor(SQInfo *pQInfo) {
  }
  // since the numOfOutputElems must be identical for all sql functions that are allowed to be executed simutanelously.
-  pQuery->rec.size = getNumOfResult(pRuntimeEnv);
+  pQuery->rec.rows = getNumOfResult(pRuntimeEnv);
  //  assert(pQuery->size <= pQuery->pointsToRead &&
  //         Q_STATUS_EQUAL(pQuery->over, QUERY_COMPLETED));
@@ -4918,12 +4921,12 @@ static void tableFixedOutputProcessor(SQInfo *pQInfo) {
  doSkipResults(pRuntimeEnv);
  doRevisedResultsByLimit(pQInfo);
-  pQuery->rec.size = pQuery->rec.size;
+  pQuery->rec.rows = pQuery->rec.rows;
 }
-static void tableMultiOutputProcessor(SQInfo *pQInfo) {
+static void tableMultiOutputProcess(SQInfo *pQInfo) {
  SQueryRuntimeEnv *pRuntimeEnv = &pQInfo->runtimeEnv;
-  SQuery *   pQuery = pRuntimeEnv->pQuery;
+  SQuery *pQuery = pRuntimeEnv->pQuery;
  // for ts_comp query, re-initialized is not allowed
  if (!isTSCompQuery(pQuery)) {
@@ -4938,8 +4941,8 @@ static void tableMultiOutputProcessor(SQInfo *pQInfo) {
      return;
    }
-    pQuery->rec.size = getNumOfResult(pRuntimeEnv);
+    pQuery->rec.rows = getNumOfResult(pRuntimeEnv);
-    if (pQuery->limit.offset > 0 && pQuery->numOfFilterCols > 0 && pQuery->rec.size > 0) {
+    if (pQuery->limit.offset > 0 && pQuery->numOfFilterCols > 0 && pQuery->rec.rows > 0) {
      doSkipResults(pRuntimeEnv);
    }
@@ -4947,7 +4950,7 @@ static void tableMultiOutputProcessor(SQInfo *pQInfo) {
     * 1. if pQuery->size == 0, pQuery->limit.offset >= 0, still need to check data
     * 2. if pQuery->size > 0, pQuery->limit.offset must be 0
     */
-    if (pQuery->rec.size > 0 || Q_STATUS_EQUAL(pQuery->status, QUERY_COMPLETED)) {
+    if (pQuery->rec.rows > 0 || Q_STATUS_EQUAL(pQuery->status, QUERY_COMPLETED)) {
      break;
    }
@@ -4959,17 +4962,16 @@ static void tableMultiOutputProcessor(SQInfo *pQInfo) {
  doRevisedResultsByLimit(pQInfo);
  if (Q_STATUS_EQUAL(pQuery->status, QUERY_RESBUF_FULL)) {
-    dTrace("QInfo:%p query paused due to buffer limitation, next qrange:%" PRId64 "-%" PRId64,
+    dTrace("QInfo:%p query paused due to output limitation, next qrange:%" PRId64 "-%" PRId64,
        pQInfo, pQuery->lastKey, pQuery->window.ekey);
  }
 //  dTrace("QInfo:%p vid:%d sid:%d id:%s, %d points returned, totalRead:%d totalReturn:%d", pQInfo, pMeterObj->vnode,
 //         pMeterObj->sid, pMeterObj->meterId, pQuery->size, pQInfo->size, pQInfo->pointsReturned);
-//  pQuery->pointsOffset = pQuery->pointsToRead;  //restore the available buffer
+  if (!isTSCompQuery(pQuery)) {
-//  if (!isTSCompQuery(pQuery)) {
+    assert(pQuery->rec.rows <= pQuery->rec.capacity);
-//    assert(pQuery->size <= pQuery->pointsToRead);
+  }
-//  }
 }
 static void tableIntervalProcessImpl(SQueryRuntimeEnv *pRuntimeEnv) {
@@ -5016,7 +5018,7 @@ static void tableIntervalProcessor(SQInfo *pQInfo) {
    if (isIntervalQuery(pQuery)) {
      pQInfo->subgroupIdx = 0;  // always start from 0
-      pQuery->rec.size = 0;
+      pQuery->rec.rows = 0;
      copyFromWindowResToSData(pQInfo, pRuntimeEnv->windowResInfo.pResult);
      clearFirstNTimeWindow(pRuntimeEnv, pQInfo->subgroupIdx);
@@ -5027,37 +5029,37 @@ static void tableIntervalProcessor(SQInfo *pQInfo) {
      doRevisedResultsByLimit(pQInfo);
      break;
    } else {
-      taosInterpoSetStartInfo(&pRuntimeEnv->interpoInfo, pQuery->rec.size, pQuery->interpoType);
+      taosInterpoSetStartInfo(&pRuntimeEnv->interpoInfo, pQuery->rec.rows, pQuery->interpoType);
      SData **pInterpoBuf = pRuntimeEnv->pInterpoBuf;
      for (int32_t i = 0; i < pQuery->numOfOutputCols; ++i) {
-        memcpy(pInterpoBuf[i]->data, pQuery->sdata[i]->data, pQuery->rec.size * pQuery->pSelectExpr[i].resBytes);
+        memcpy(pInterpoBuf[i]->data, pQuery->sdata[i]->data, pQuery->rec.rows * pQuery->pSelectExpr[i].resBytes);
      }
      numOfInterpo = 0;
-      pQuery->rec.size = vnodeQueryResultInterpolate(
+      pQuery->rec.rows = vnodeQueryResultInterpolate(
-          pQInfo, (tFilePage **)pQuery->sdata, (tFilePage **)pInterpoBuf, pQuery->rec.size, &numOfInterpo);
+          pQInfo, (tFilePage **)pQuery->sdata, (tFilePage **)pInterpoBuf, pQuery->rec.rows, &numOfInterpo);
-      dTrace("QInfo: %p interpo completed, final:%d", pQInfo, pQuery->rec.size);
+      dTrace("QInfo: %p interpo completed, final:%d", pQInfo, pQuery->rec.rows);
-      if (pQuery->rec.size > 0 || Q_STATUS_EQUAL(pQuery->status, QUERY_COMPLETED)) {
+      if (pQuery->rec.rows > 0 || Q_STATUS_EQUAL(pQuery->status, QUERY_COMPLETED)) {
        doRevisedResultsByLimit(pQInfo);
        break;
      }
      // no result generated yet, continue retrieve data
-      pQuery->rec.size = 0;
+      pQuery->rec.rows = 0;
    }
  }
  // all data scanned, the group by normal column can return
  if (isGroupbyNormalCol(pQuery->pGroupbyExpr)) {  // todo refactor with merge interval time result
    pQInfo->subgroupIdx = 0;
-    pQuery->rec.size = 0;
+    pQuery->rec.rows = 0;
    copyFromWindowResToSData(pQInfo, pRuntimeEnv->windowResInfo.pResult);
    clearFirstNTimeWindow(pRuntimeEnv, pQInfo->subgroupIdx);
  }
-  pQuery->rec.size += pQuery->rec.size;
+  pQuery->rec.rows += pQuery->rec.rows;
  pQInfo->pointsInterpo += numOfInterpo;
  //  dTrace("%p vid:%d sid:%d id:%s, %d points returned %d points interpo, totalRead:%d totalInterpo:%d
@@ -5066,7 +5068,7 @@ static void tableIntervalProcessor(SQInfo *pQInfo) {
  //         pQInfo->size - pQInfo->pointsInterpo, pQInfo->pointsInterpo, pQInfo->pointsReturned);
 }
-static void singleTableQueryImpl(SQInfo* pQInfo) {
+static void tableQueryImpl(SQInfo* pQInfo) {
  SQueryRuntimeEnv* pRuntimeEnv = &pQInfo->runtimeEnv;
  SQuery* pQuery = pRuntimeEnv->pQuery;
@@ -5077,15 +5079,15 @@ static void singleTableQueryImpl(SQInfo* pQInfo) {
     */
    int32_t numOfInterpo = 0;
    int32_t remain = taosNumOfRemainPoints(&pRuntimeEnv->interpoInfo);
-    pQuery->rec.size = vnodeQueryResultInterpolate(pQInfo, (tFilePage **)pQuery->sdata,
+    pQuery->rec.rows = vnodeQueryResultInterpolate(pQInfo, (tFilePage **)pQuery->sdata,
                                                   (tFilePage **)pRuntimeEnv->pInterpoBuf, remain, &numOfInterpo);
    doRevisedResultsByLimit(pQInfo);
    pQInfo->pointsInterpo += numOfInterpo;
-    pQuery->rec.size += pQuery->rec.size;
+    pQuery->rec.rows += pQuery->rec.rows;
-    dTrace("QInfo:%p current:%d returned, total:%d", pQInfo, pQuery->rec.size, pQuery->rec.total);
+    dTrace("QInfo:%p current:%d returned, total:%d", pQInfo, pQuery->rec.rows, pQuery->rec.total);
    sem_post(&pQInfo->dataReady);
    return;
  }
@@ -5097,17 +5099,17 @@ static void singleTableQueryImpl(SQInfo* pQInfo) {
          ((isIntervalQuery(pQuery) && pQuery->rec.total < pQuery->limit.limit))) {
      // todo limit the output for interval query?
-      pQuery->rec.size = 0;
+      pQuery->rec.rows = 0;
      pQInfo->subgroupIdx = 0;  // always start from 0
      if (pRuntimeEnv->windowResInfo.size > 0) {
        copyFromWindowResToSData(pQInfo, pRuntimeEnv->windowResInfo.pResult);
-        pQuery->rec.size += pQuery->rec.size;
+        pQuery->rec.rows += pQuery->rec.rows;
        clearFirstNTimeWindow(pRuntimeEnv, pQInfo->subgroupIdx);
-        if (pQuery->rec.size > 0) {
+        if (pQuery->rec.rows > 0) {
-          dTrace("QInfo:%p %d rows returned from group results, total:%d", pQInfo, pQuery->rec.size, pQuery->rec.total);
+          dTrace("QInfo:%p %d rows returned from group results, total:%d", pQInfo, pQuery->rec.rows, pQuery->rec.total);
          sem_post(&pQInfo->dataReady);
          return;
        }
@@ -5121,23 +5123,21 @@ static void singleTableQueryImpl(SQInfo* pQInfo) {
  }
  // number of points returned during this query
-  pQuery->rec.size = 0;
+  pQuery->rec.rows = 0;
  int64_t st = taosGetTimestampUs();
  // group by normal column, sliding window query, interval query are handled by interval query processor
  if (isIntervalQuery(pQuery) || isGroupbyNormalCol(pQuery->pGroupbyExpr)) {  // interval (down sampling operation)
    tableIntervalProcessor(pQInfo);
-  } else {
+  } else if (isFixedOutputQuery(pQuery)) {
-    if (isFixedOutputQuery(pQuery)) {
+    assert(pQuery->checkBuffer == 0);
-      assert(pQuery->checkBufferInLoop == 0);
    tableFixedOutputProcessor(pQInfo);
  } else {  // diff/add/multiply/subtract/division
-      assert(pQuery->checkBufferInLoop == 1);
+    assert(pQuery->checkBuffer == 1);
-      tableMultiOutputProcessor(pQInfo);
+    tableMultiOutputProcess(pQInfo);
-    }
  }
  // record the total elapsed time
  pQInfo->elapsedTime += (taosGetTimestampUs() - st);
@@ -5145,16 +5145,16 @@ static void singleTableQueryImpl(SQInfo* pQInfo) {
  if (isQueryKilled(pQInfo)) {
    dTrace("QInfo:%p query is killed", pQInfo);
  } else {
-    dTrace("QInfo:%p query task completed, %" PRId64 " rows will returned, total:%" PRId64 " rows", pQInfo, pQuery->rec.size,
+    dTrace("QInfo:%p query task completed, %" PRId64 " rows will returned, total:%" PRId64 " rows", pQInfo, pQuery->rec.rows,
        pQuery->rec.total);
  }
  sem_post(&pQInfo->dataReady);
 }
-static void multiTableQueryImpl(SQInfo* pQInfo) {
+static void stableQueryImpl(SQInfo* pQInfo) {
  SQuery* pQuery = pQInfo->runtimeEnv.pQuery;
-  pQuery->rec.size = 0;
+  pQuery->rec.rows = 0;
  int64_t st = taosGetTimestampUs();
@@ -5162,7 +5162,7 @@ static void multiTableQueryImpl(SQInfo* pQInfo) {
      (isFixedOutputQuery(pQuery) && (!isPointInterpoQuery(pQuery)) && !isGroupbyNormalCol(pQuery->pGroupbyExpr))) {
    multiTableQueryProcess(pQInfo);
  } else {
-    assert((pQuery->checkBufferInLoop == 1 && pQuery->intervalTime == 0) || isPointInterpoQuery(pQuery) ||
+    assert((pQuery->checkBuffer == 1 && pQuery->intervalTime == 0) || isPointInterpoQuery(pQuery) ||
        isGroupbyNormalCol(pQuery->pGroupbyExpr));
    vnodeSTableSeqProcessor(pQInfo);
@@ -5172,7 +5172,7 @@ static void multiTableQueryImpl(SQInfo* pQInfo) {
  pQInfo->elapsedTime += (taosGetTimestampUs() - st);
 //  taosInterpoSetStartInfo(&pQInfo->runtimeEnv.interpoInfo, pQuery->size, pQInfo->query.interpoType);
-  if (pQuery->rec.size == 0) {
+  if (pQuery->rec.rows == 0) {
    int32_t numOfTables = taosArrayGetSize(pQInfo->pTableIdList);
    dTrace("QInfo:%p over, %d tables queried, %d points are returned", pQInfo, numOfTables, pQuery->rec.total);
 //    vnodePrintQueryStatistics(pSupporter);
@@ -5267,7 +5267,7 @@ static char* createTableIdList(SQueryTableMsg* pQueryMsg, char* pMsg, SArray** p
 * @return
 */
 static int32_t convertQueryMsg(SQueryTableMsg *pQueryMsg, SArray **pTableIdList, SSqlFuncExprMsg ***pExpr,
-      wchar_t** tagCond) {
+      char** tagCond) {
  pQueryMsg->numOfTables   = htonl(pQueryMsg->numOfTables);
  pQueryMsg->window.skey   = htobe64(pQueryMsg->window.skey);
@@ -5285,7 +5285,6 @@ static int32_t convertQueryMsg(SQueryTableMsg *pQueryMsg, SArray **pTableIdList,
  pQueryMsg->numOfOutputCols = htons(pQueryMsg->numOfOutputCols);
  pQueryMsg->numOfGroupCols = htons(pQueryMsg->numOfGroupCols);
  pQueryMsg->tagCondLen    = htons(pQueryMsg->tagCondLen);
-  pQueryMsg->nameCondLen   = htons(pQueryMsg->nameCondLen);
  pQueryMsg->tsOffset      = htonl(pQueryMsg->tsOffset);
  pQueryMsg->tsLen         = htonl(pQueryMsg->tsLen);
  pQueryMsg->tsNumOfBlocks = htonl(pQueryMsg->tsNumOfBlocks);
@@ -5345,7 +5344,7 @@ static int32_t convertQueryMsg(SQueryTableMsg *pQueryMsg, SArray **pTableIdList,
  for (int32_t i = 0; i < pQueryMsg->numOfOutputCols; ++i) {
    (*pExpr)[i] = pExprMsg;
-    pExprMsg->colInfo.colIdx = htons(pExprMsg->colInfo.colIdx);
+    pExprMsg->colInfo.colIndex = htons(pExprMsg->colInfo.colIndex);
    pExprMsg->colInfo.colId  = htons(pExprMsg->colInfo.colId);
    pExprMsg->colInfo.flag   = htons(pExprMsg->colInfo.flag);
    pExprMsg->functionId     = htons(pExprMsg->functionId);
@@ -5399,7 +5398,7 @@ static int32_t convertQueryMsg(SQueryTableMsg *pQueryMsg, SArray **pTableIdList,
    pQueryMsg->orderByIdx = htons(pQueryMsg->orderByIdx);
    pQueryMsg->orderType = htons(pQueryMsg->orderType);
-    pMsg += sizeof(SColIndexEx) * pQueryMsg->numOfGroupCols;
+    pMsg += sizeof(SColIndex) * pQueryMsg->numOfGroupCols;
  } else {
    pQueryMsg->groupbyTagIds = 0;
  }
@@ -5418,8 +5417,8 @@ static int32_t convertQueryMsg(SQueryTableMsg *pQueryMsg, SArray **pTableIdList,
  // the tag query condition expression string is located at the end of query msg
  if (pQueryMsg->tagCondLen > 0) {
-    *tagCond = calloc(1, pQueryMsg->tagCondLen * TSDB_NCHAR_SIZE);
+    *tagCond = calloc(1, pQueryMsg->tagCondLen);
-    memcpy(*tagCond, pMsg, pQueryMsg->tagCondLen * TSDB_NCHAR_SIZE);
+    memcpy(*tagCond, pMsg, pQueryMsg->tagCondLen);
  }
  dTrace("qmsg:%p query on %d table(s), qrange:%" PRId64 "-%" PRId64 ", numOfGroupbyTagCols:%d, ts order:%d, "
@@ -5469,10 +5468,10 @@ static int32_t buildAirthmeticExprFromMsg(SSqlFunctionExpr *pExpr, SQueryTableMs
  // there may be duplicated referenced columns.
  num = i + 1;
-  pBinaryExprInfo->pReqColumns = malloc(sizeof(SColIndexEx) * num);
+  pBinaryExprInfo->pReqColumns = malloc(sizeof(SColIndex) * num);
  for (int32_t k = 0; k < num; ++k) {
-    SColIndexEx* pColIndex = &pBinaryExprInfo->pReqColumns[k];
+    SColIndex* pColIndex = &pBinaryExprInfo->pReqColumns[k];
    pColIndex->colId = ids[k];
  }
@@ -5569,19 +5568,19 @@ static SSqlGroupbyExpr *createGroupbyExprFromMsg(SQueryTableMsg *pQueryMsg, int3
  // using group by tag columns
  SSqlGroupbyExpr *pGroupbyExpr =
-      (SSqlGroupbyExpr *)malloc(sizeof(SSqlGroupbyExpr) + pQueryMsg->numOfGroupCols * sizeof(SColIndexEx));
+      (SSqlGroupbyExpr *)malloc(sizeof(SSqlGroupbyExpr) + pQueryMsg->numOfGroupCols * sizeof(SColIndex));
  if (pGroupbyExpr == NULL) {
    *code = TSDB_CODE_SERV_OUT_OF_MEMORY;
    return NULL;
  }
-  SColIndexEx *pGroupbyColInfo = (SColIndexEx *)pQueryMsg->groupbyTagIds;
+  SColIndex *pGroupbyColInfo = (SColIndex *)pQueryMsg->groupbyTagIds;
  pGroupbyExpr->numOfGroupCols = pQueryMsg->numOfGroupCols;
  pGroupbyExpr->orderType = pQueryMsg->orderType;
  pGroupbyExpr->orderIndex = pQueryMsg->orderByIdx;
-  memcpy(pGroupbyExpr->columnInfo, pGroupbyColInfo, sizeof(SColIndexEx) * pGroupbyExpr->numOfGroupCols);
+  memcpy(pGroupbyExpr->columnInfo, pGroupbyColInfo, sizeof(SColIndex) * pGroupbyExpr->numOfGroupCols);
  return pGroupbyExpr;
 }
@@ -5631,9 +5630,9 @@ static int32_t vnodeCreateFilterInfo(void *pQInfo, SQuery *pQuery) {
          return TSDB_CODE_INVALID_QUERY_MSG;
        }
-        if ((lower == TSDB_RELATION_LARGE_EQUAL || lower == TSDB_RELATION_LARGE) &&
+        if ((lower == TSDB_RELATION_GREATER_EQUAL || lower == TSDB_RELATION_GREATER) &&
            (upper == TSDB_RELATION_LESS_EQUAL || upper == TSDB_RELATION_LESS)) {
-          if (lower == TSDB_RELATION_LARGE_EQUAL) {
+          if (lower == TSDB_RELATION_GREATER_EQUAL) {
            if (upper == TSDB_RELATION_LESS_EQUAL) {
              pSingleColFilter->fp = rangeFilterArray[4];
            } else {
@@ -5674,16 +5673,16 @@ static void doUpdateExprColumnIndex(SQuery* pQuery) {
 //  int32_t i = 0, j = 0;
 //  while (i < pQuery->numOfCols && j < pMeterObj->numOfColumns) {
 //    if (pQuery->colList[i].data.colId == pMeterObj->schema[j].colId) {
-//      pQuery->colList[i++].colIdx = (int16_t)j++;
+//      pQuery->colList[i++].colIndex = (int16_t)j++;
 //    } else if (pQuery->colList[i].data.colId < pMeterObj->schema[j].colId) {
-//      pQuery->colList[i++].colIdx = -1;
+//      pQuery->colList[i++].colIndex = -1;
 //    } else if (pQuery->colList[i].data.colId > pMeterObj->schema[j].colId) {
 //      j++;
 //    }
 //  }
 //  while (i < pQuery->numOfCols) {
-//    pQuery->colList[i++].colIdx = -1;  // not such column in current meter
+//    pQuery->colList[i++].colIndex = -1;  // not such column in current meter
 //  }
  for(int32_t k = 0; k < pQuery->numOfOutputCols; ++k) {
@@ -5692,10 +5691,10 @@ static void doUpdateExprColumnIndex(SQuery* pQuery) {
      continue;
    }
-    SColIndexEx* pColIndexEx = &pSqlExprMsg->colInfo;
+    SColIndex* pColIndexEx = &pSqlExprMsg->colInfo;
    for(int32_t f = 0; f < pQuery->numOfCols; ++f) {
      if (pColIndexEx->colId == pQuery->colList[f].info.colId) {
-        pColIndexEx->colIdx = f;
+        pColIndexEx->colIndex = f;
        break;
      }
    }
@@ -5776,7 +5775,7 @@ static SQInfo *createQInfoImpl(SQueryTableMsg *pQueryMsg, SSqlGroupbyExpr *pGrou
  // set the output buffer capacity
  pQuery->rec.capacity = 4096;
-  pQuery->rec.threshold = 2;
+  pQuery->rec.threshold = 4000;
  for (int32_t col = 0; col < pQuery->numOfOutputCols; ++col) {
    assert(pExprs[col].interResBytes >= pExprs[col].resBytes);
@@ -5855,7 +5854,7 @@ static bool isValidQInfo(void *param) {
 }
 static void freeQInfo(SQInfo *pQInfo);
-static int32_t initializeQInfo(SQueryTableMsg *pQueryMsg, void* tsdb, SQInfo *pQInfo, bool isSTable) {
+static int32_t initQInfo(SQueryTableMsg *pQueryMsg, void* tsdb, SQInfo *pQInfo, bool isSTable) {
  int32_t code = TSDB_CODE_SUCCESS;
  SQuery *pQuery = pQInfo->runtimeEnv.pQuery;
@@ -5880,7 +5879,7 @@ static int32_t initializeQInfo(SQueryTableMsg *pQueryMsg, void* tsdb, SQInfo *pQ
  }
  // filter the qualified
-  if ((code = doInitializeQInfo(pQInfo, pTSBuf, tsdb, isSTable)) != TSDB_CODE_SUCCESS) {
+  if ((code = doInitQInfo(pQInfo, pTSBuf, tsdb, isSTable)) != TSDB_CODE_SUCCESS) {
    goto _error;
  }
@@ -6004,11 +6003,11 @@ static int32_t doDumpQueryResult(SQInfo *pQInfo, char *data) {
             pQuery->sdata[0]->data, strerror(errno));
    }
  } else {
-    doCopyQueryResultToMsg(pQInfo, pQuery->rec.size, data);
+    doCopyQueryResultToMsg(pQInfo, pQuery->rec.rows, data);
  }
-  pQuery->rec.total += pQuery->rec.size;
+  pQuery->rec.total += pQuery->rec.rows;
-  dTrace("QInfo:%p current:%d, total:%d", pQInfo, pQuery->rec.size, pQuery->rec.total);
+  dTrace("QInfo:%p current:%d, total:%d", pQInfo, pQuery->rec.rows, pQuery->rec.total);
  return TSDB_CODE_SUCCESS;
@@ -6020,9 +6019,9 @@ int32_t qCreateQueryInfo(void* tsdb, SQueryTableMsg *pQueryMsg, SQInfo **pQInfo)
  int32_t code = TSDB_CODE_SUCCESS;
+  char* tagCond = NULL;
  SArray *pTableIdList = NULL;
  SSqlFuncExprMsg** pExprMsg = NULL;
-  wchar_t* tagCond = NULL;
  if ((code = convertQueryMsg(pQueryMsg, &pTableIdList, &pExprMsg, &tagCond)) != TSDB_CODE_SUCCESS) {
    return code;
  }
@@ -6050,21 +6049,23 @@ int32_t qCreateQueryInfo(void* tsdb, SQueryTableMsg *pQueryMsg, SQInfo **pQInfo)
    goto _query_over;
  }
-  // super table query
-  SArray* res = NULL;
  bool isSTableQuery = false;
+  SArray* res = NULL;
  if ((pQueryMsg->queryType & TSDB_QUERY_TYPE_STABLE_QUERY) != 0) {
    isSTableQuery = true;
    STableId* id = taosArrayGet(pTableIdList, 0);
    id->uid = -1;
-    res = tsdbQueryTableList(tsdb, id->uid, tagCond, pQueryMsg->tagCondLen);
+    res = taosArrayInit(8, sizeof(STableId));
+    /*int32_t ret =*/ tsdbQueryTags(tsdb, id->uid, tagCond, pQueryMsg->tagCondLen, res);
    if (taosArrayGetSize(res) == 0) { // no qualified table in stable query in this vnode
      code = TSDB_CODE_SUCCESS;
      goto _query_over;
    }
  } else {
+    assert(taosArrayGetSize(pTableIdList) == 1);
    res = pTableIdList;
  }
@@ -6073,7 +6074,7 @@ int32_t qCreateQueryInfo(void* tsdb, SQueryTableMsg *pQueryMsg, SQInfo **pQInfo)
    code = TSDB_CODE_SERV_OUT_OF_MEMORY;
  }
-  code = initializeQInfo(pQueryMsg, tsdb, *pQInfo, isSTableQuery);
+  code = initQInfo(pQueryMsg, tsdb, *pQInfo, isSTableQuery);
 _query_over:
  if (code != TSDB_CODE_SUCCESS) {
@@ -6116,11 +6117,10 @@ void qTableQuery(SQInfo *pQInfo) {
  dTrace("QInfo:%p query task is launched", pQInfo);
-  int32_t numOfTables = taosArrayGetSize(pQInfo->pTableIdList);
+  if (pQInfo->runtimeEnv.stableQuery) {
-  if (numOfTables == 1) {
+    stableQueryImpl(pQInfo);
-    singleTableQueryImpl(pQInfo);
  } else {
-    multiTableQueryImpl(pQInfo);
+    tableQueryImpl(pQInfo);
  }
  //  vnodeDecRefCount(pQInfo);
@@ -6138,7 +6138,7 @@ int32_t qRetrieveQueryResultInfo(SQInfo *pQInfo) {
  }
  sem_wait(&pQInfo->dataReady);
-  dTrace("QInfo:%p retrieve result info, rowsize:%d, rows:%d, code:%d", pQInfo, pQuery->rowSize, pQuery->rec.size,
+  dTrace("QInfo:%p retrieve result info, rowsize:%d, rows:%d, code:%d", pQInfo, pQuery->rowSize, pQuery->rec.rows,
      pQInfo->code);
  return pQInfo->code;
@@ -6167,12 +6167,12 @@ int32_t qDumpRetrieveResult(SQInfo *pQInfo, SRetrieveTableRsp** pRsp, int32_t* c
  }
  SQuery* pQuery = pQInfo->runtimeEnv.pQuery;
-  size_t size = getResultSize(pQInfo, &pQuery->rec.size);
+  size_t size = getResultSize(pQInfo, &pQuery->rec.rows);
  *contLen = size + sizeof(SRetrieveTableRsp);
  // todo handle failed to allocate memory
  *pRsp = (SRetrieveTableRsp *)rpcMallocCont(*contLen);
-  (*pRsp)->numOfRows = htonl(pQuery->rec.size);
+  (*pRsp)->numOfRows = htonl(pQuery->rec.rows);
  int32_t code = pQInfo->code;
  if (code == TSDB_CODE_SUCCESS) {
@@ -6183,7 +6183,7 @@ int32_t qDumpRetrieveResult(SQInfo *pQInfo, SRetrieveTableRsp** pRsp, int32_t* c
    (*pRsp)->useconds = 0;
  }
-  if (pQuery->rec.size > 0 && code == TSDB_CODE_SUCCESS) {
+  if (pQuery->rec.rows > 0 && code == TSDB_CODE_SUCCESS) {
    code = doDumpQueryResult(pQInfo, (*pRsp)->data);
  } else {
    setQueryStatus(pQuery, QUERY_OVER);

--- a/src/query/src/sql.c
+++ b/src/query/src/sql.c
@@ -2471,13 +2471,13 @@ static void yy_reduce(
  yymsp[-1].minor.yy380 = yylhsminor.yy380;
        break;
      case 152: /* sortorder ::= ASC */
-{yymsp[0].minor.yy250 = TSQL_SO_ASC; }
+{yymsp[0].minor.yy250 = TSDB_ORDER_ASC; }
        break;
      case 153: /* sortorder ::= DESC */
-{yymsp[0].minor.yy250 = TSQL_SO_DESC;}
+{yymsp[0].minor.yy250 = TSDB_ORDER_DESC;}
        break;
      case 154: /* sortorder ::= */
-{yymsp[1].minor.yy250 = TSQL_SO_ASC;}
+{yymsp[1].minor.yy250 = TSDB_ORDER_ASC;}
        break;
      case 157: /* grouplist ::= grouplist COMMA item */
 {

--- a/src/util/inc/tcompare.h
+++ b/src/util/inc/tcompare.h
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef TDENGINE_TCOMPARE_H
+#define TDENGINE_TCOMPARE_H
+#include "os.h"
+int32_t compareInt32Val(const void *pLeft, const void *pRight);
+int32_t compareInt64Val(const void *pLeft, const void *pRight);
+int32_t compareInt16Val(const void *pLeft, const void *pRight);
+int32_t compareInt8Val(const void *pLeft, const void *pRight);
+int32_t compareIntDoubleVal(const void *pLeft, const void *pRight);
+int32_t compareDoubleIntVal(const void *pLeft, const void *pRight);
+int32_t compareDoubleVal(const void *pLeft, const void *pRight);
+int32_t compareStrVal(const void *pLeft, const void *pRight);
+int32_t compareWStrVal(const void *pLeft, const void *pRight);
+__compar_fn_t getKeyComparFunc(int32_t keyType);
+__compar_fn_t getComparFunc(int32_t type, int32_t filterDataType);
+#endif  // TDENGINE_TCOMPARE_H
--- a/src/util/src/tcompare.c
+++ b/src/util/src/tcompare.c
+#include "taosdef.h"
+#include "tcompare.h"
+int32_t compareInt32Val(const void *pLeft, const void *pRight) {
+  int32_t ret = GET_INT32_VAL(pLeft) - GET_INT32_VAL(pRight);
+  if (ret == 0) {
+    return 0;
+  } else {
+    return ret > 0 ? 1 : -1;
+  }
+}
+int32_t compareInt64Val(const void *pLeft, const void *pRight) {
+  int32_t ret = GET_INT64_VAL(pLeft) - GET_INT64_VAL(pRight);
+  if (ret == 0) {
+    return 0;
+  } else {
+    return ret > 0 ? 1 : -1;
+  }
+}
+int32_t compareInt16Val(const void *pLeft, const void *pRight) {
+  int32_t ret = GET_INT16_VAL(pLeft) - GET_INT16_VAL(pRight);
+  if (ret == 0) {
+    return 0;
+  } else {
+    return ret > 0 ? 1 : -1;
+  }
+}
+int32_t compareInt8Val(const void *pLeft, const void *pRight) {
+  int32_t ret = GET_INT8_VAL(pLeft) - GET_INT8_VAL(pRight);
+  if (ret == 0) {
+    return 0;
+  } else {
+    return ret > 0 ? 1 : -1;
+  }
+}
+int32_t compareIntDoubleVal(const void *pLeft, const void *pRight) {
+  //  int64_t lhs = ((SSkipListKey *)pLeft)->i64Key;
+  //  double  rhs = ((SSkipListKey *)pRight)->dKey;
+  //  if (fabs(lhs - rhs) < FLT_EPSILON) {
+  //    return 0;
+  //  } else {
+  //    return (lhs > rhs) ? 1 : -1;
+  //  }
+  return 0;
+}
+int32_t compareDoubleIntVal(const void *pLeft, const void *pRight) {
+  //  double  lhs = ((SSkipListKey *)pLeft)->dKey;
+  //  int64_t rhs = ((SSkipListKey *)pRight)->i64Key;
+  //  if (fabs(lhs - rhs) < FLT_EPSILON) {
+  //    return 0;
+  //  } else {
+  //    return (lhs > rhs) ? 1 : -1;
+  //  }
+  return 0;
+}
+int32_t compareDoubleVal(const void *pLeft, const void *pRight) {
+  double ret = GET_DOUBLE_VAL(pLeft) - GET_DOUBLE_VAL(pRight);
+  if (fabs(ret) < FLT_EPSILON) {
+    return 0;
+  } else {
+    return ret > 0 ? 1 : -1;
+  }
+}
+int32_t compareStrVal(const void *pLeft, const void *pRight) {
+  int32_t ret = strcmp(pLeft, pRight);
+  if (ret == 0) {
+    return 0;
+  } else {
+    return ret > 0 ? 1 : -1;
+  }
+}
+int32_t compareWStrVal(const void *pLeft, const void *pRight) {
+  //  SSkipListKey *pL = (SSkipListKey *)pLeft;
+  //  SSkipListKey *pR = (SSkipListKey *)pRight;
+  //
+  //  if (pL->nLen == 0 && pR->nLen == 0) {
+  //    return 0;
+  //  }
+  //
+  //  // handle only one-side bound compare situation, there is only lower bound or only upper bound
+  //  if (pL->nLen == -1) {
+  //    return 1;  // no lower bound, lower bound is minimum, always return -1;
+  //  } else if (pR->nLen == -1) {
+  //    return -1;  // no upper bound, upper bound is maximum situation, always return 1;
+  //  }
+  //
+  //  int32_t ret = wcscmp(((SSkipListKey *)pLeft)->wpz, ((SSkipListKey *)pRight)->wpz);
+  //
+  //  if (ret == 0) {
+  //    return 0;
+  //  } else {
+  //    return ret > 0 ? 1 : -1;
+  //  }
+  return 0;
+}
+__compar_fn_t getComparFunc(int32_t type, int32_t filterDataType) {
+  __compar_fn_t comparFn = NULL;
+  switch (type) {
+    case TSDB_DATA_TYPE_TINYINT:
+    case TSDB_DATA_TYPE_SMALLINT:
+    case TSDB_DATA_TYPE_INT:
+    case TSDB_DATA_TYPE_BIGINT: {
+      if (filterDataType == TSDB_DATA_TYPE_BIGINT) {
+        comparFn = compareInt64Val;
+        break;
+      }
+    }
+    case TSDB_DATA_TYPE_BOOL: {
+      if (filterDataType >= TSDB_DATA_TYPE_BOOL && filterDataType <= TSDB_DATA_TYPE_BIGINT) {
+        comparFn = compareInt32Val;
+      } else if (filterDataType >= TSDB_DATA_TYPE_FLOAT && filterDataType <= TSDB_DATA_TYPE_DOUBLE) {
+        comparFn = compareIntDoubleVal;
+      }
+      break;
+    }
+    case TSDB_DATA_TYPE_FLOAT:
+    case TSDB_DATA_TYPE_DOUBLE: {
+//      if (filterDataType >= TSDB_DATA_TYPE_BOOL && filterDataType <= TSDB_DATA_TYPE_BIGINT) {
+//        comparFn = compareDoubleIntVal;
+//      } else if (filterDataType >= TSDB_DATA_TYPE_FLOAT && filterDataType <= TSDB_DATA_TYPE_DOUBLE) {
+//        comparFn = compareDoubleVal;
+//      }
+      if (filterDataType == TSDB_DATA_TYPE_DOUBLE) {
+        comparFn = compareDoubleVal;
+      }
+      break;
+    }
+    case TSDB_DATA_TYPE_BINARY:
+      comparFn = compareStrVal;
+      break;
+    case TSDB_DATA_TYPE_NCHAR:
+      comparFn = compareWStrVal;
+      break;
+    default:
+      comparFn = compareInt32Val;
+      break;
+  }
+  return comparFn;
+}
+__compar_fn_t getKeyComparFunc(int32_t keyType) {
+  __compar_fn_t comparFn = NULL;
+  switch (keyType) {
+    case TSDB_DATA_TYPE_TINYINT:
+      comparFn = compareInt8Val;
+      break;
+    case TSDB_DATA_TYPE_SMALLINT:
+      comparFn = compareInt16Val;
+      break;
+    case TSDB_DATA_TYPE_INT:
+      comparFn = compareInt32Val;
+      break;
+    case TSDB_DATA_TYPE_BIGINT:
+    case TSDB_DATA_TYPE_TIMESTAMP:
+      comparFn = compareInt64Val;
+      break;
+    case TSDB_DATA_TYPE_BOOL:
+      comparFn = compareInt32Val;
+      break;
+    case TSDB_DATA_TYPE_FLOAT:
+    case TSDB_DATA_TYPE_DOUBLE:
+      comparFn = compareDoubleVal;
+      break;
+    case TSDB_DATA_TYPE_BINARY:
+      comparFn = compareStrVal;
+      break;
+    case TSDB_DATA_TYPE_NCHAR:
+      comparFn = compareWStrVal;
+      break;
+    default:
+      comparFn = compareInt32Val;
+      break;
+  }
+  return comparFn;
+}
--- a/src/vnode/tsdb/inc/tsdb.h
+++ b/src/vnode/tsdb/inc/tsdb.h
@@ -208,7 +208,7 @@ typedef struct SBlockInfo {
 typedef struct SDataBlockInfo {
  STimeWindow window;
-  int32_t     size;
+  int32_t     rows;
  int32_t     numOfCols;
  int64_t     uid;
  int32_t     sid;
@@ -335,7 +335,7 @@ SArray *tsdbGetTableList(tsdb_query_handle_t *pQueryHandle);
 * @param pTagCond. tag query condition
 *
 */
-SArray *tsdbQueryTableList(tsdb_repo_t* tsdb, int64_t uid, const wchar_t *pTagCond, size_t len);
+int32_t tsdbQueryTags(tsdb_repo_t* tsdb, int64_t uid, const char *pTagCond, size_t len, SArray* list);
 /**
 * clean up the query handle

--- a/src/vnode/tsdb/src/tsdbMain.c
+++ b/src/vnode/tsdb/src/tsdbMain.c
@@ -6,9 +6,10 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/sendfile.h>
 #include <sys/stat.h>
 #include <sys/types.h>
-#include <sys/sendfile.h>
+#include <tlog.h>
 #include <unistd.h>
 // #include "taosdef.h"
@@ -738,6 +739,7 @@ static int32_t tsdbInsertDataToTable(tsdb_repo_t *repo, SSubmitBlk *pBlock) {
  STableId tableId = {.uid = pBlock->uid, .tid = pBlock->tid};
  STable *pTable = tsdbIsValidTableToInsert(pRepo->tsdbMeta, tableId);
  if (pTable == NULL) {
+    dError("failed to get table for insert, uid:%" PRIu64 ", tid:%d", tableId.uid, tableId.tid);
    return TSDB_CODE_INVALID_TABLE_ID;
  }

--- a/src/vnode/tsdb/src/tsdbMeta.c
+++ b/src/vnode/tsdb/src/tsdbMeta.c
@@ -93,6 +93,11 @@ void tsdbFreeEncode(void *cont) {
  if (cont != NULL) free(cont);
 }
+static char* getTagIndexKey(const void* pData) {
+  STable* table = *(STable**) pData;
+  return getTupleKey(table->tagVal);
+}
 int tsdbRestoreTable(void *pHandle, void *cont, int contLen) {
  STsdbMeta *pMeta = (STsdbMeta *)pHandle;
@@ -101,7 +106,7 @@ int tsdbRestoreTable(void *pHandle, void *cont, int contLen) {
  if (pTable->type == TSDB_SUPER_TABLE) {
    pTable->pIndex =
-        tSkipListCreate(TSDB_SUPER_TABLE_SL_LEVEL, TSDB_DATA_TYPE_TIMESTAMP, sizeof(int64_t), 1, 0, 0, getTupleKey);
+        tSkipListCreate(TSDB_SUPER_TABLE_SL_LEVEL, TSDB_DATA_TYPE_TIMESTAMP, sizeof(int64_t), 1, 0, 0, getTagIndexKey);
  }
  tsdbAddTableToMeta(pMeta, pTable, false);
@@ -218,7 +223,7 @@ int32_t tsdbCreateTableImpl(STsdbMeta *pMeta, STableCfg *pCfg) {
      super->tagSchema = tdDupSchema(pCfg->tagSchema);
      super->tagVal = tdDataRowDup(pCfg->tagValues);
      super->pIndex = tSkipListCreate(TSDB_SUPER_TABLE_SL_LEVEL, TSDB_DATA_TYPE_TIMESTAMP, sizeof(int64_t), 1,
-                                                0, 0, getTupleKey);  // Allow duplicate key, no lock
+                                                0, 0, getTagIndexKey);  // Allow duplicate key, no lock
      if (super->pIndex == NULL) {
        tdFreeSchema(super->schema);
@@ -403,8 +408,6 @@ static int tsdbAddTableIntoIndex(STsdbMeta *pMeta, STable *pTable) {
  pNode->level = level;
  SSkipList* list = pSTable->pIndex;
-  memcpy(SL_GET_NODE_KEY(list, pNode),  dataRowTuple(pTable->tagVal), colBytes(s));
  memcpy(SL_GET_NODE_DATA(pNode), &pTable, POINTER_BYTES);
  tSkipListPut(list, pNode);

--- a/src/vnode/tsdb/src/tsdbRead.c
+++ b/src/vnode/tsdb/src/tsdbRead.c
@@ -19,13 +19,14 @@
 #include "tutil.h"
 #include "../../../query/inc/qast.h"
+#include "../../../query/inc/tlosertree.h"
 #include "../../../query/inc/tsqlfunction.h"
 #include "tsdb.h"
 #include "tsdbMain.h"
 #define EXTRA_BYTES 2
-#define PRIMARY_TSCOL_REQUIRED(c) (((SColumnInfoEx *)taosArrayGet(c, 0))->info.colId == PRIMARYKEY_TIMESTAMP_COL_INDEX)
+#define PRIMARY_TSCOL_REQUIRED(c) (((SColumnInfoEx*)taosArrayGet(c, 0))->info.colId == PRIMARYKEY_TIMESTAMP_COL_INDEX)
-#define QUERY_IS_ASC_QUERY(o) (o == TSQL_SO_ASC)
+#define QUERY_IS_ASC_QUERY(o) (o == TSDB_ORDER_ASC)
 #define QH_GET_NUM_OF_COLS(handle) (taosArrayGetSize((handle)->pColumns))
 enum {
@@ -48,7 +49,7 @@ typedef struct SDataBlockLoadInfo {
  SFileGroup* fileGroup;
  int32_t     slot;
  int32_t     sid;
-  SArray *pLoadedCols;
+  SArray*     pLoadedCols;
 } SDataBlockLoadInfo;
 typedef struct SLoadCompBlockInfo {
@@ -57,52 +58,31 @@ typedef struct SLoadCompBlockInfo {
  int32_t fileListIndex;
 } SLoadCompBlockInfo;
-typedef struct SQueryFilesInfo {
-  SArray *pFileInfo;
-  int32_t current;  // the memory mapped header file, NOTE: only one header file can be mmap.
-  int32_t vnodeId;
-  int32_t headerFd;  // header file fd
-  int64_t headerFileSize;
-  int32_t dataFd;
-  int32_t lastFd;
-  char headerFilePath[PATH_MAX];  // current opened header file name
-  char dataFilePath[PATH_MAX];    // current opened data file name
-  char lastFilePath[PATH_MAX];    // current opened last file path
-  char dbFilePathPrefix[PATH_MAX];
-} SQueryFilesInfo;
 typedef struct STableCheckInfo {
  STableId   tableId;
  TSKEY      lastKey;
-  STable *    pTableObj;
+  STable*    pTableObj;
  int64_t    offsetInHeaderFile;
-//  int32_t     numOfBlocks;
  int32_t    start;
  bool       checkFirstFileBlock;
+  SCompInfo* pCompInfo;
-  SCompIdx*   compIndex;
+  int32_t    numOfBlocks;  // number of qualified data blocks not the original blocks
-  SCompInfo *pCompInfo;
  SDataCols*         pDataCols;
-  SFileGroup* pFileGroup;
-  SFileGroupIter fileIter;
  SSkipListIterator* iter;
 } STableCheckInfo;
 typedef struct {
-  SCompBlock *compBlock;
+  SCompBlock* compBlock;
-  SField *    fields;
+  SField*     fields;
 } SCompBlockFields;
-typedef struct STableDataBlockInfoEx {
+typedef struct STableBlockInfo {
  SCompBlockFields pBlock;
-  STableCheckInfo* pMeterDataInfo;
+  STableCheckInfo* pTableCheckInfo;
  int32_t          blockIndex;
-  int32_t          groupIdx; /* number of group is less than the total number of meters */
+  int32_t          groupIdx; /* number of group is less than the total number of tables */
-} STableDataBlockInfoEx;
+} STableBlockInfo;
 enum {
  SINGLE_TABLE_MODEL = 1,
@@ -114,13 +94,9 @@ typedef struct STsdbQueryHandle {
  int8_t        model;  // access model, single table model or multi-table model
  SQueryFilePos cur;    // current position
  SQueryFilePos start;  // the start position, used for secondary/third iteration
-  int32_t         unzipBufSize;
-  char           *unzipBuffer;
-  char           *secondaryUnzipBuffer;
  SDataBlockLoadInfo dataBlockLoadInfo; /* record current block load information */
  SLoadCompBlockInfo compBlockLoadInfo; /* record current compblock information in SQuery */
-  SQueryFilesInfo vnodeFileInfo;
  int16_t     numOfRowsPerPage;
  uint16_t    flag;  // denotes reversed scan of data or not
@@ -129,24 +105,29 @@ typedef struct STsdbQueryHandle {
  int32_t     blockBufferSize;
  SCompBlock* pBlock;
  int32_t     numOfBlocks;
-  SField **   pFields;
+  SField**    pFields;
-  SArray *    pColumns;         // column list, SColumnInfoEx array list
+  SArray*     pColumns;  // column list, SColumnInfoEx array list
  bool        locateStart;
  int32_t     realNumOfRows;
  bool        loadDataAfterSeek;  // load data after seek.
  SArray*     pTableCheckInfo;
  int32_t     activeIndex;
+  bool    checkFiles;  // check file stage
  int32_t tableIndex;
  bool    isFirstSlot;
-  void *      qinfo;              // query info handle, for debug purpose
+  void*   qinfo;  // query info handle, for debug purpose
+  STableBlockInfo* pDataBlockInfo;
-  STableDataBlockInfoEx *pDataBlockInfoEx;
+  SFileGroup*    pFileGroup;
+  SFileGroupIter fileIter;
+  SCompIdx*      compIndex;
 } STsdbQueryHandle;
-int32_t doAllocateBuf(STsdbQueryHandle *pQueryHandle, int32_t rowsPerFileBlock) {
+int32_t doAllocateBuf(STsdbQueryHandle* pQueryHandle, int32_t rowsPerFileBlock) {
  // record the maximum column width among columns of this meter/metric
-  SColumnInfoEx *pColumn = taosArrayGet(pQueryHandle->pColumns, 0);
+  SColumnInfoEx* pColumn = taosArrayGet(pQueryHandle->pColumns, 0);
  int32_t maxColWidth = pColumn->info.bytes;
  for (int32_t i = 1; i < QH_GET_NUM_OF_COLS(pQueryHandle); ++i) {
@@ -156,55 +137,31 @@ int32_t doAllocateBuf(STsdbQueryHandle *pQueryHandle, int32_t rowsPerFileBlock)
    }
  }
-  // only one unzip buffer required, since we can unzip each column one by one
-  pQueryHandle->unzipBufSize = (size_t)(maxColWidth * rowsPerFileBlock + EXTRA_BYTES);  // plus extra_bytes
-  pQueryHandle->unzipBuffer = (char *)calloc(1, pQueryHandle->unzipBufSize);
-  pQueryHandle->secondaryUnzipBuffer = (char *)calloc(1, pQueryHandle->unzipBufSize);
-  if (pQueryHandle->unzipBuffer == NULL || pQueryHandle->secondaryUnzipBuffer == NULL) {
-    goto _error_clean;
-  }
  return TSDB_CODE_SUCCESS;
-_error_clean:
-  tfree(pQueryHandle->unzipBuffer);
-  tfree(pQueryHandle->secondaryUnzipBuffer);
-  return TSDB_CODE_SERV_OUT_OF_MEMORY;
 }
-static void initQueryFileInfoFD(SQueryFilesInfo *pVnodeFilesInfo) {
+static void tsdbInitDataBlockLoadInfo(SDataBlockLoadInfo* pBlockLoadInfo) {
-  pVnodeFilesInfo->current = -1;
-  pVnodeFilesInfo->headerFileSize = -1;
-  pVnodeFilesInfo->headerFd = FD_INITIALIZER;  // set the initial value
-  pVnodeFilesInfo->dataFd = FD_INITIALIZER;
-  pVnodeFilesInfo->lastFd = FD_INITIALIZER;
-}
-static void vnodeInitDataBlockLoadInfo(SDataBlockLoadInfo *pBlockLoadInfo) {
  pBlockLoadInfo->slot = -1;
  pBlockLoadInfo->sid = -1;
  pBlockLoadInfo->fileGroup = NULL;
 }
-static void vnodeInitCompBlockLoadInfo(SLoadCompBlockInfo *pCompBlockLoadInfo) {
+static void tsdbInitCompBlockLoadInfo(SLoadCompBlockInfo* pCompBlockLoadInfo) {
  pCompBlockLoadInfo->sid = -1;
  pCompBlockLoadInfo->fileId = -1;
  pCompBlockLoadInfo->fileListIndex = -1;
 }
-tsdb_query_handle_t *tsdbQueryByTableId(tsdb_repo_t* tsdb, STsdbQueryCond *pCond, SArray *idList, SArray *pColumnInfo) {
+tsdb_query_handle_t* tsdbQueryByTableId(tsdb_repo_t* tsdb, STsdbQueryCond* pCond, SArray* idList, SArray* pColumnInfo) {
  // todo 1. filter not exist table
  // todo 2. add the reference count for each table that is involved in query
-  STsdbQueryHandle *pQueryHandle = calloc(1, sizeof(STsdbQueryHandle));
+  STsdbQueryHandle* pQueryHandle = calloc(1, sizeof(STsdbQueryHandle));
  pQueryHandle->order = pCond->order;
  pQueryHandle->window = pCond->twindow;
  pQueryHandle->pTsdb = tsdb;
+  pQueryHandle->compIndex = calloc(10000, sizeof(SCompIdx)),
  pQueryHandle->loadDataAfterSeek = false;
  pQueryHandle->isFirstSlot = true;
@@ -213,14 +170,13 @@ tsdb_query_handle_t *tsdbQueryByTableId(tsdb_repo_t* tsdb, STsdbQueryCond *pCond
  assert(size >= 1);
  pQueryHandle->pTableCheckInfo = taosArrayInit(size, sizeof(STableCheckInfo));
-  for(int32_t i = 0; i < size; ++i) {
+  for (int32_t i = 0; i < size; ++i) {
-    STableId id = *(STableId*) taosArrayGet(idList, i);
+    STableId id = *(STableId*)taosArrayGet(idList, i);
    STableCheckInfo info = {
        .lastKey = pQueryHandle->window.skey,
        .tableId = id,
-      .pTableObj = tsdbGetTableByUid(tsdbGetMeta(tsdb), id.uid),  //todo this may be failed
+        .pTableObj = tsdbGetTableByUid(tsdbGetMeta(tsdb), id.uid),  // todo this may be failed
-      .compIndex = calloc(10000, sizeof(SCompIdx)),
        .pCompInfo = calloc(1, 1024),
    };
@@ -228,7 +184,8 @@ tsdb_query_handle_t *tsdbQueryByTableId(tsdb_repo_t* tsdb, STsdbQueryCond *pCond
    taosArrayPush(pQueryHandle->pTableCheckInfo, &info);
  }
-  pQueryHandle->model = (size > 1)? MULTI_TABLE_MODEL:SINGLE_TABLE_MODEL;
+  pQueryHandle->model = (size > 1) ? MULTI_TABLE_MODEL : SINGLE_TABLE_MODEL;
+  pQueryHandle->checkFiles = 1;
  pQueryHandle->activeIndex = 0;
@@ -238,7 +195,7 @@ tsdb_query_handle_t *tsdbQueryByTableId(tsdb_repo_t* tsdb, STsdbQueryCond *pCond
  pQueryHandle->pColumns = taosArrayInit(numOfCols, sizeof(SColumnInfoEx));
  for (int32_t i = 0; i < numOfCols; ++i) {
-    SColumnInfoEx *pCol = taosArrayGet(pColumnInfo, i);
+    SColumnInfoEx* pCol = taosArrayGet(pColumnInfo, i);
    SColumnInfoEx  pDest = {{0}, 0};
    pDest.pData = calloc(1, EXTRA_BYTES + bufferCapacity * pCol->info.bytes);
@@ -250,19 +207,18 @@ tsdb_query_handle_t *tsdbQueryByTableId(tsdb_repo_t* tsdb, STsdbQueryCond *pCond
    return NULL;
  }
-  initQueryFileInfoFD(&pQueryHandle->vnodeFileInfo);
+  tsdbInitDataBlockLoadInfo(&pQueryHandle->dataBlockLoadInfo);
-  vnodeInitDataBlockLoadInfo(&pQueryHandle->dataBlockLoadInfo);
+  tsdbInitCompBlockLoadInfo(&pQueryHandle->compBlockLoadInfo);
-  vnodeInitCompBlockLoadInfo(&pQueryHandle->compBlockLoadInfo);
  return (tsdb_query_handle_t)pQueryHandle;
 }
-static bool hasMoreDataInCacheForSingleModel(STsdbQueryHandle* pHandle) {
+static bool hasMoreDataInCache(STsdbQueryHandle* pHandle) {
  assert(pHandle->activeIndex == 0 && taosArrayGetSize(pHandle->pTableCheckInfo) == 1);
  STableCheckInfo* pTableCheckInfo = taosArrayGet(pHandle->pTableCheckInfo, pHandle->activeIndex);
-  STable *pTable = pTableCheckInfo->pTableObj;
+  STable* pTable = pTableCheckInfo->pTableObj;
  assert(pTable != NULL);
  // no data in cache, abort
@@ -283,25 +239,74 @@ static int32_t getFileIdFromKey(TSKEY key) {
  return (int32_t)(key / 10);  // set the starting fileId
 }
-static int32_t getFileCompInfo(STableCheckInfo* pCheckInfo, SFileGroup* fileGroup) {
+static int32_t binarySearchForBlockImpl(SCompBlock* pBlock, int32_t numOfBlocks, TSKEY skey, int32_t order);
-  // check open file failed
+static int32_t getFileCompInfo(STsdbQueryHandle* pQueryHandle, int32_t* numOfBlocks, int32_t type) {
+  // todo check open file failed
+  SFileGroup* fileGroup = pQueryHandle->pFileGroup;
  if (fileGroup->files[TSDB_FILE_TYPE_HEAD].fd == FD_INITIALIZER) {
    fileGroup->files[TSDB_FILE_TYPE_HEAD].fd = open(fileGroup->files[TSDB_FILE_TYPE_HEAD].fname, O_RDONLY);
  }
-  tsdbLoadCompIdx(fileGroup, pCheckInfo->compIndex, 10000); // todo set dynamic max tables
+  // load all the comp offset value for all tables in this file
-  SCompIdx* compIndex = &pCheckInfo->compIndex[pCheckInfo->tableId.tid];
+  tsdbLoadCompIdx(fileGroup, pQueryHandle->compIndex, 10000);  // todo set dynamic max tables
+  *numOfBlocks = 0;
+  size_t numOfTables = taosArrayGetSize(pQueryHandle->pTableCheckInfo);
+  for (int32_t i = 0; i < numOfTables; ++i) {
+    STableCheckInfo* pCheckInfo = taosArrayGet(pQueryHandle->pTableCheckInfo, i);
+    SCompIdx* compIndex = &pQueryHandle->compIndex[pCheckInfo->tableId.tid];
    if (compIndex->len == 0 || compIndex->numOfSuperBlocks == 0) {  // no data block in this file, try next file
    } else {
      tsdbLoadCompBlocks(fileGroup, compIndex, pCheckInfo->pCompInfo);
+      int32_t index = 0;
+      // discard the unqualified data block based on the query time window
+      int32_t start = binarySearchForBlockImpl(pCheckInfo->pCompInfo->blocks, compIndex->numOfSuperBlocks,
+                                               pQueryHandle->order, pCheckInfo->lastKey);
+      if (type == QUERY_RANGE_GREATER_EQUAL) {
+        if (pCheckInfo->lastKey <= pCheckInfo->pCompInfo->blocks[start].keyLast) {
+          //          break;
+        } else {
+          index = -1;
+        }
+      } else {
+        if (pCheckInfo->lastKey >= pCheckInfo->pCompInfo->blocks[start].keyFirst) {
+          //          break;
+        } else {
+          index = -1;
+        }
+      }
+      // not found in data blocks in current file
+      if (index == -1) {
+        continue;
+      }
+      // todo speedup the procedure of locating end block
+      int32_t e = start;
+      while (e < compIndex->numOfSuperBlocks &&
+             (pCheckInfo->pCompInfo->blocks[e].keyFirst <= pQueryHandle->window.ekey)) {
+        e += 1;
+      }
+      if (start > 0) {
+        memmove(pCheckInfo->pCompInfo->blocks, &pCheckInfo->pCompInfo->blocks[start], (e - start) * sizeof(SCompBlock));
+      }
+      pCheckInfo->numOfBlocks = (e - start);
+      (*numOfBlocks) += pCheckInfo->numOfBlocks;
+    }
  }
  return TSDB_CODE_SUCCESS;
 }
-static int32_t binarySearchForBlockImpl(SCompBlock *pBlock, int32_t numOfBlocks, TSKEY skey, int32_t order) {
+int32_t binarySearchForBlockImpl(SCompBlock* pBlock, int32_t numOfBlocks, TSKEY skey, int32_t order) {
  int32_t firstSlot = 0;
  int32_t lastSlot = numOfBlocks - 1;
@@ -315,10 +320,10 @@ static int32_t binarySearchForBlockImpl(SCompBlock *pBlock, int32_t numOfBlocks,
    if (skey > pBlock[midSlot].keyLast) {
      if (numOfBlocks == 2) break;
-      if ((order == TSQL_SO_DESC) && (skey < pBlock[midSlot + 1].keyFirst)) break;
+      if ((order == TSDB_ORDER_DESC) && (skey < pBlock[midSlot + 1].keyFirst)) break;
      firstSlot = midSlot + 1;
    } else if (skey < pBlock[midSlot].keyFirst) {
-      if ((order == TSQL_SO_ASC) && (skey > pBlock[midSlot - 1].keyLast)) break;
+      if ((order == TSDB_ORDER_ASC) && (skey > pBlock[midSlot - 1].keyLast)) break;
      lastSlot = midSlot - 1;
    } else {
      break;  // got the slot
@@ -328,13 +333,11 @@ static int32_t binarySearchForBlockImpl(SCompBlock *pBlock, int32_t numOfBlocks,
  return midSlot;
 }
-static SDataBlockInfo getTrueDataBlockInfo(STsdbQueryHandle* pHandle, STableCheckInfo* pCheckInfo) {
+static SDataBlockInfo getTrueDataBlockInfo(STableCheckInfo* pCheckInfo, SCompBlock* pBlock) {
-  SCompBlock *pDiskBlock = &pCheckInfo->pCompInfo->blocks[pHandle->cur.slot];
  SDataBlockInfo info = {
-      .window    = {.skey = pDiskBlock->keyFirst, .ekey = pDiskBlock->keyLast},
+      .window = {.skey = pBlock->keyFirst, .ekey = pBlock->keyLast},
-      .numOfCols = pDiskBlock->numOfCols,
+      .numOfCols = pBlock->numOfCols,
-      .size      = pDiskBlock->numOfPoints,
+      .rows = pBlock->numOfPoints,
      .sid = pCheckInfo->tableId.tid,
      .uid = pCheckInfo->tableId.uid,
  };
@@ -342,50 +345,76 @@ static SDataBlockInfo getTrueDataBlockInfo(STsdbQueryHandle* pHandle, STableChec
  return info;
 }
-SArray *getDefaultLoadColumns(STsdbQueryHandle *pQueryHandle, bool loadTS);
+SArray*        getDefaultLoadColumns(STsdbQueryHandle* pQueryHandle, bool loadTS);
-static void filterDataInDataBlock(STsdbQueryHandle *pQueryHandle, SDataCols* pCols, SArray *sa);
+static void    filterDataInDataBlock(STsdbQueryHandle* pQueryHandle, STableCheckInfo* pCheckInfo, SCompBlock* pBlock,
+                                     SArray* sa);
-static bool doLoadDataFromFileBlock(STsdbQueryHandle *pQueryHandle) {
+static int32_t binarySearchForKey(char* pValue, int num, TSKEY key, int order);
-  SQueryFilePos *cur = &pQueryHandle->cur;
-  STableCheckInfo* pCheckInfo = taosArrayGet(pQueryHandle->pTableCheckInfo, pQueryHandle->activeIndex);
-  SCompBlock* pBlock = &pCheckInfo->pCompInfo->blocks[cur->slot];
-  SCompData* data = calloc(1, sizeof(SCompData)+ sizeof(SCompCol)*pBlock->numOfCols);
+static bool doLoadFileDataBlock(STsdbQueryHandle* pQueryHandle, SCompBlock* pBlock, STableCheckInfo* pCheckInfo) {
+  SCompData* data = calloc(1, sizeof(SCompData) + sizeof(SCompCol) * pBlock->numOfCols);
  data->numOfCols = pBlock->numOfCols;
  data->uid = pCheckInfo->pTableObj->tableId.uid;
+  bool    blockLoaded = false;
+  SArray* sa = getDefaultLoadColumns(pQueryHandle, true);
+  if (pCheckInfo->pDataCols == NULL) {
    pCheckInfo->pDataCols = tdNewDataCols(1000, 2, 4096);
-  tdInitDataCols(pCheckInfo->pDataCols, pCheckInfo->pTableObj->schema);
+  }
+  tdInitDataCols(pCheckInfo->pDataCols, tsdbGetTableSchema(tsdbGetMeta(pQueryHandle->pTsdb), pCheckInfo->pTableObj));
-  SFile* pFile = &pCheckInfo->pFileGroup->files[TSDB_FILE_TYPE_DATA];
+  SFile* pFile = &pQueryHandle->pFileGroup->files[TSDB_FILE_TYPE_DATA];
  if (pFile->fd == FD_INITIALIZER) {
    pFile->fd = open(pFile->fname, O_RDONLY);
  }
-  tsdbLoadDataBlock(pFile, pBlock, 1, pCheckInfo->pDataCols, data);
+  if (tsdbLoadDataBlock(pFile, pBlock, 1, pCheckInfo->pDataCols, data) == 0) {
-  return true;
+    SDataBlockLoadInfo* pBlockLoadInfo = &pQueryHandle->dataBlockLoadInfo;
-}
-static bool loadQualifiedDataFromFileBlock(STsdbQueryHandle *pQueryHandle) {
+    pBlockLoadInfo->fileGroup = pQueryHandle->pFileGroup;
-  SQueryFilePos *cur = &pQueryHandle->cur;
+    pBlockLoadInfo->slot = pQueryHandle->cur.slot;
+    pBlockLoadInfo->sid = pCheckInfo->pTableObj->tableId.tid;
-  STableCheckInfo* pCheckInfo = taosArrayGet(pQueryHandle->pTableCheckInfo, pQueryHandle->activeIndex);
+    blockLoaded = true;
-  SCompBlock* pBlock = &pCheckInfo->pCompInfo->blocks[cur->slot];
+  }
+  taosArrayDestroy(sa);
+  tfree(data);
+  TSKEY* d = (TSKEY*)pCheckInfo->pDataCols->cols[PRIMARYKEY_TIMESTAMP_COL_INDEX].pData;
+  assert(d[0] == pBlock->keyFirst && d[pBlock->numOfPoints - 1] == pBlock->keyLast);
+  return blockLoaded;
+}
+static bool loadFileDataBlock(STsdbQueryHandle* pQueryHandle, SCompBlock* pBlock, STableCheckInfo* pCheckInfo) {
+  SArray*        sa = getDefaultLoadColumns(pQueryHandle, true);
+  SQueryFilePos* cur = &pQueryHandle->cur;
-  SArray *sa = getDefaultLoadColumns(pQueryHandle, true);
  if (QUERY_IS_ASC_QUERY(pQueryHandle->order)) {
    // query ended in current block
    if (pQueryHandle->window.ekey < pBlock->keyLast) {
-      doLoadDataFromFileBlock(pQueryHandle);
+      if (!doLoadFileDataBlock(pQueryHandle, pBlock, pCheckInfo)) {
-      filterDataInDataBlock(pQueryHandle, pCheckInfo->pDataCols, sa);
+        return false;
+      }
+      SDataCols* pDataCols = pCheckInfo->pDataCols;
+      if (pCheckInfo->lastKey > pBlock->keyFirst) {
+        cur->pos =
+            binarySearchForKey(pDataCols->cols[0].pData, pBlock->numOfPoints, pCheckInfo->lastKey, pQueryHandle->order);
+      } else {
+        cur->pos = 0;
+      }
+      filterDataInDataBlock(pQueryHandle, pCheckInfo, pBlock, sa);
    } else {  // the whole block is loaded in to buffer
      pQueryHandle->realNumOfRows = pBlock->numOfPoints;
    }
-  } else {// todo desc query
+  } else {  // todo desc query
    if (pQueryHandle->window.ekey > pBlock->keyFirst) {
-//
    }
  }
@@ -393,8 +422,8 @@ static bool loadQualifiedDataFromFileBlock(STsdbQueryHandle *pQueryHandle) {
  return pQueryHandle->realNumOfRows > 0;
 }
-bool moveToNextBlock(STsdbQueryHandle *pQueryHandle, int32_t step) {
+bool moveToNextBlock(STsdbQueryHandle* pQueryHandle, int32_t step) {
-  SQueryFilePos *cur = &pQueryHandle->cur;
+  SQueryFilePos* cur = &pQueryHandle->cur;
  if (pQueryHandle->cur.fid >= 0) {
    /*
@@ -405,61 +434,57 @@ bool moveToNextBlock(STsdbQueryHandle *pQueryHandle, int32_t step) {
    int32_t          tid = pCheckInfo->tableId.tid;
    if ((step == QUERY_ASC_FORWARD_STEP &&
-         (pQueryHandle->cur.slot == pCheckInfo->compIndex[tid].numOfSuperBlocks - 1)) ||
+         (pQueryHandle->cur.slot == pQueryHandle->compIndex[tid].numOfSuperBlocks - 1)) ||
        (step == QUERY_DESC_FORWARD_STEP && (pQueryHandle->cur.slot == 0))) {
      // temporarily keep the position value, in case of no data qualified when move forwards(backwards)
-//      SQueryFilePos save = pQueryHandle->cur;
+      //      SQueryFilePos save = pQueryHandle->cur;
-      SFileGroup*   fgroup = tsdbGetFileGroupNext(&pCheckInfo->fileIter);
+      pQueryHandle->pFileGroup = tsdbGetFileGroupNext(&pQueryHandle->fileIter);
      int32_t fid = -1;
-      if (fgroup != NULL) {
+      int32_t numOfBlocks = 0;
-        if ((fid = getFileCompInfo(pCheckInfo, fgroup)) < 0) {
+      if (pQueryHandle->pFileGroup != NULL) {
+        if ((fid = getFileCompInfo(pQueryHandle, &numOfBlocks, 1)) < 0) {
        } else {
          cur->slot = (step == QUERY_ASC_FORWARD_STEP) ? 0 : pQueryHandle->numOfBlocks - 1;
          cur->pos = (step == QUERY_ASC_FORWARD_STEP) ? 0 : pQueryHandle->pBlock[cur->slot].numOfPoints - 1;
          SCompBlock* pBlock = &pCheckInfo->pCompInfo->blocks[cur->slot];
-          SCompData*  data = calloc(1, sizeof(SCompData) + sizeof(SCompCol) * pBlock->numOfCols);
+          cur->fid = pQueryHandle->pFileGroup->fileId;
-          data->numOfCols = pBlock->numOfCols;
-          data->uid = pCheckInfo->pTableObj->tableId.uid;
-          cur->fid = fgroup->fileId;
          assert(cur->pos >= 0 && cur->fid >= 0 && cur->slot >= 0);
          if (pBlock->keyFirst > pQueryHandle->window.ekey) {  // done
            return false;
          }
-          loadQualifiedDataFromFileBlock(pQueryHandle);
+          return loadFileDataBlock(pQueryHandle, pBlock, pCheckInfo);
-          return true;
        }
      } else {  // check data in cache
        pQueryHandle->cur.fid = -1;
-        return hasMoreDataInCacheForSingleModel(pQueryHandle);
+        return hasMoreDataInCache(pQueryHandle);
      }
    } else {  // next block in the same file
      cur->slot += step;
      SCompBlock* pBlock = &pCheckInfo->pCompInfo->blocks[cur->slot];
      cur->pos = (step == QUERY_ASC_FORWARD_STEP) ? 0 : pBlock->numOfPoints - 1;
-      return loadQualifiedDataFromFileBlock(pQueryHandle);
+      return loadFileDataBlock(pQueryHandle, pBlock, pCheckInfo);
    }
  } else {  // data in cache
-    return hasMoreDataInCacheForSingleModel(pQueryHandle);
+    return hasMoreDataInCache(pQueryHandle);
  }
  return false;
 }
-int vnodeBinarySearchKey(char *pValue, int num, TSKEY key, int order) {
+int vnodeBinarySearchKey(char* pValue, int num, TSKEY key, int order) {
  int    firstPos, lastPos, midPos = -1;
  int    numOfPoints;
-  TSKEY *keyList;
+  TSKEY* keyList;
  if (num <= 0) return -1;
-  keyList = (TSKEY *)pValue;
+  keyList = (TSKEY*)pValue;
  firstPos = 0;
  lastPos = num - 1;
@@ -514,14 +539,16 @@ int vnodeBinarySearchKey(char *pValue, int num, TSKEY key, int order) {
 // only return the qualified data to client in terms of query time window, data rows in the same block but do not
 // be included in the query time window will be discarded
-static void filterDataInDataBlock(STsdbQueryHandle *pQueryHandle, SDataCols* pCols, SArray *sa) {
+static void filterDataInDataBlock(STsdbQueryHandle* pQueryHandle, STableCheckInfo* pCheckInfo, SCompBlock* pBlock,
-  SQueryFilePos *cur = &pQueryHandle->cur;
+                                  SArray* sa) {
-  STableCheckInfo* pCheckInfo = taosArrayGet(pQueryHandle->pTableCheckInfo, pQueryHandle->activeIndex);
+  SQueryFilePos* cur = &pQueryHandle->cur;
-  SDataBlockInfo blockInfo = getTrueDataBlockInfo(pQueryHandle, pCheckInfo);
+  SDataBlockInfo blockInfo = getTrueDataBlockInfo(pCheckInfo, pBlock);
+  SDataCols* pCols = pCheckInfo->pDataCols;
  int32_t endPos = cur->pos;
  if (QUERY_IS_ASC_QUERY(pQueryHandle->order) && pQueryHandle->window.ekey > blockInfo.window.ekey) {
-    endPos = blockInfo.size - 1;
+    endPos = blockInfo.rows - 1;
    pQueryHandle->realNumOfRows = endPos - cur->pos + 1;
    pCheckInfo->lastKey = blockInfo.window.ekey + 1;
  } else if (!QUERY_IS_ASC_QUERY(pQueryHandle->order) && pQueryHandle->window.ekey < blockInfo.window.skey) {
@@ -529,7 +556,8 @@ static void filterDataInDataBlock(STsdbQueryHandle *pQueryHandle, SDataCols* pCo
    pQueryHandle->realNumOfRows = cur->pos + 1;
    pCheckInfo->lastKey = blockInfo.window.ekey - 1;
  } else {
-    endPos = vnodeBinarySearchKey(pCols->cols[0].pData, pCols->numOfPoints, pQueryHandle->window.ekey, pQueryHandle->order);
+    endPos =
+        vnodeBinarySearchKey(pCols->cols[0].pData, pCols->numOfPoints, pQueryHandle->window.ekey, pQueryHandle->order);
    if (QUERY_IS_ASC_QUERY(pQueryHandle->order)) {
      if (endPos < cur->pos) {
@@ -558,41 +586,42 @@ static void filterDataInDataBlock(STsdbQueryHandle *pQueryHandle, SDataCols* pCo
  int32_t numOfCols = QH_GET_NUM_OF_COLS(pQueryHandle);
  for (int32_t i = 0; i < taosArrayGetSize(sa); ++i) {
-    int16_t colId = *(int16_t *)taosArrayGet(sa, i);
+    int16_t colId = *(int16_t*)taosArrayGet(sa, i);
    for (int32_t j = 0; j < numOfCols; ++j) {
-      SColumnInfoEx *pCol = taosArrayGet(pQueryHandle->pColumns, j);
+      SColumnInfoEx* pCol = taosArrayGet(pQueryHandle->pColumns, j);
      if (pCol->info.colId == colId) {
        SDataCol* pDataCol = &pCols->cols[i];
-        memmove(pCol->pData, pDataCol->pData + pCol->info.bytes * start, pQueryHandle->realNumOfRows * pCol->info.bytes);
+        memmove(pCol->pData, pDataCol->pData + pCol->info.bytes * start,
+                pQueryHandle->realNumOfRows * pCol->info.bytes);
        break;
      }
    }
  }
-  assert(pQueryHandle->realNumOfRows <= blockInfo.size);
+  assert(pQueryHandle->realNumOfRows <= blockInfo.rows);
  // forward(backward) the position for cursor
  cur->pos = endPos;
 }
-static SArray *getColumnIdList(STsdbQueryHandle *pQueryHandle) {
+static SArray* getColumnIdList(STsdbQueryHandle* pQueryHandle) {
  int32_t numOfCols = QH_GET_NUM_OF_COLS(pQueryHandle);
-  SArray *pIdList = taosArrayInit(numOfCols, sizeof(int16_t));
+  SArray* pIdList = taosArrayInit(numOfCols, sizeof(int16_t));
  for (int32_t i = 0; i < numOfCols; ++i) {
-    SColumnInfoEx *pCol = taosArrayGet(pQueryHandle->pColumns, i);
+    SColumnInfoEx* pCol = taosArrayGet(pQueryHandle->pColumns, i);
    taosArrayPush(pIdList, &pCol->info.colId);
  }
  return pIdList;
 }
-SArray *getDefaultLoadColumns(STsdbQueryHandle *pQueryHandle, bool loadTS) {
+SArray* getDefaultLoadColumns(STsdbQueryHandle* pQueryHandle, bool loadTS) {
-  SArray *pLocalIdList = getColumnIdList(pQueryHandle);
+  SArray* pLocalIdList = getColumnIdList(pQueryHandle);
  // check if the primary time stamp column needs to load
-  int16_t colId = *(int16_t *)taosArrayGet(pLocalIdList, 0);
+  int16_t colId = *(int16_t*)taosArrayGet(pLocalIdList, 0);
  // the primary timestamp column does not be included in the the specified load column list, add it
  if (loadTS && colId != 0) {
@@ -603,14 +632,14 @@ SArray *getDefaultLoadColumns(STsdbQueryHandle *pQueryHandle, bool loadTS) {
  return pLocalIdList;
 }
-static int32_t binarySearchForKey(char *pValue, int num, TSKEY key, int order) {
+int32_t binarySearchForKey(char* pValue, int num, TSKEY key, int order) {
  int    firstPos, lastPos, midPos = -1;
  int    numOfPoints;
-  TSKEY *keyList;
+  TSKEY* keyList;
  if (num <= 0) return -1;
-  keyList = (TSKEY *)pValue;
+  keyList = (TSKEY*)pValue;
  firstPos = 0;
  lastPos = num - 1;
@@ -663,186 +692,368 @@ static int32_t binarySearchForKey(char *pValue, int num, TSKEY key, int order) {
  return midPos;
 }
-static bool getQualifiedDataBlock(STsdbQueryHandle *pQueryHandle, STableCheckInfo* pCheckInfo, int32_t type) {
+static bool getQualifiedDataBlock(STsdbQueryHandle* pQueryHandle, STableCheckInfo* pCheckInfo, int32_t type) {
  STsdbFileH* pFileHandle = tsdbGetFile(pQueryHandle->pTsdb);
  int32_t     fid = getFileIdFromKey(pCheckInfo->lastKey);
-  tsdbInitFileGroupIter(pFileHandle, &pCheckInfo->fileIter, TSDB_FGROUP_ITER_FORWARD);
+  tsdbInitFileGroupIter(pFileHandle, &pQueryHandle->fileIter, TSDB_FGROUP_ITER_FORWARD);
-  tsdbSeekFileGroupIter(&pCheckInfo->fileIter, fid);
+  tsdbSeekFileGroupIter(&pQueryHandle->fileIter, fid);
-  pCheckInfo->pFileGroup = tsdbGetFileGroupNext(&pCheckInfo->fileIter);
+  pQueryHandle->pFileGroup = tsdbGetFileGroupNext(&pQueryHandle->fileIter);
  SQueryFilePos* cur = &pQueryHandle->cur;
-  TSKEY key = pCheckInfo->lastKey;
-  int32_t index = -1;
  int32_t tid = pCheckInfo->tableId.tid;
+  int32_t numOfBlocks = 0;
-  while (pCheckInfo->pFileGroup != NULL) {
+  while (pQueryHandle->pFileGroup != NULL) {
-    if (getFileCompInfo(pCheckInfo, pCheckInfo->pFileGroup) != TSDB_CODE_SUCCESS) {
+    if (getFileCompInfo(pQueryHandle, &numOfBlocks, 1) != TSDB_CODE_SUCCESS) {
      break;
    }
+    assert(pCheckInfo->numOfBlocks >= 0);
    // no data block in current file, try next
-    if (pCheckInfo->compIndex[tid].numOfSuperBlocks == 0) {
+    if (pCheckInfo->numOfBlocks > 0) {
-      dTrace("QInfo:%p no data block in file, fid:%d, tid:%d, try next", pQueryHandle->qinfo,
+      cur->fid = pQueryHandle->pFileGroup->fileId;
-          pCheckInfo->pFileGroup->fileId, tid);
+      break;
+    }
-      pCheckInfo->pFileGroup = tsdbGetFileGroupNext(&pCheckInfo->fileIter);
+    dTrace("%p no data block in file, fid:%d, tid:%d, try next, %p", pQueryHandle, pQueryHandle->pFileGroup->fileId,
-      continue;
+           tid, pQueryHandle->qinfo);
+    pQueryHandle->pFileGroup = tsdbGetFileGroupNext(&pQueryHandle->fileIter);
  }
-    index = binarySearchForBlockImpl(pCheckInfo->pCompInfo->blocks, pCheckInfo->compIndex[tid].numOfSuperBlocks, pQueryHandle->order, key);
+  if (pCheckInfo->numOfBlocks == 0) {
+    return false;
+  }
-    if (type == QUERY_RANGE_GREATER_EQUAL) {
+  cur->slot = 0;  // always start from the first slot
-      if (key <= pCheckInfo->pCompInfo->blocks[index].keyLast) {
+  SCompBlock* pBlock = &pCheckInfo->pCompInfo->blocks[cur->slot];
-        break;
+  return loadFileDataBlock(pQueryHandle, pBlock, pCheckInfo);
-      } else {
+}
-        index = -1;
+static UNUSED_FUNC bool hasMoreDataForSingleTable(STsdbQueryHandle* pHandle) {
+  assert(pHandle->activeIndex == 0 && taosArrayGetSize(pHandle->pTableCheckInfo) == 1);
+  STsdbFileH*      pFileHandle = tsdbGetFile(pHandle->pTsdb);
+  STableCheckInfo* pCheckInfo = taosArrayGet(pHandle->pTableCheckInfo, pHandle->activeIndex);
+  if (!pCheckInfo->checkFirstFileBlock) {
+    pCheckInfo->checkFirstFileBlock = true;
+    if (pFileHandle != NULL) {
+      bool found = getQualifiedDataBlock(pHandle, pCheckInfo, 1);
+      if (found) {
+        return true;
      }
-    } else {
-      if (key >= pCheckInfo->pCompInfo->blocks[index].keyFirst) {
-        break;
-      } else {
-        index = -1;
    }
+    // no data in file, try cache
+    pHandle->cur.fid = -1;
+    return hasMoreDataInCache(pHandle);
+  } else {  // move to next data block in file or in cache
+    return moveToNextBlock(pHandle, 1);
  }
+}
+typedef struct SBlockOrderSupporter {
+  int32_t             numOfTables;
+  STableBlockInfo** pDataBlockInfo;
+  int32_t*            blockIndexArray;
+  int32_t*            numOfBlocksPerMeter;
+} SBlockOrderSupporter;
+void cleanBlockOrderSupporter(SBlockOrderSupporter* pSupporter, int32_t numOfTables) {
+  tfree(pSupporter->numOfBlocksPerMeter);
+  tfree(pSupporter->blockIndexArray);
+  for (int32_t i = 0; i < numOfTables; ++i) {
+    tfree(pSupporter->pDataBlockInfo[i]);
  }
-  // failed to find qualified point in file, abort
+  tfree(pSupporter->pDataBlockInfo);
-  if (index == -1) {
+}
-    return false;
+static int32_t dataBlockOrderCompar(const void* pLeft, const void* pRight, void* param) {
+  int32_t leftTableIndex = *(int32_t*)pLeft;
+  int32_t rightTableIndex = *(int32_t*)pRight;
+  SBlockOrderSupporter* pSupporter = (SBlockOrderSupporter*)param;
+  int32_t leftTableBlockIndex = pSupporter->blockIndexArray[leftTableIndex];
+  int32_t rightTableBlockIndex = pSupporter->blockIndexArray[rightTableIndex];
+  if (leftTableBlockIndex > pSupporter->numOfBlocksPerMeter[leftTableIndex]) {
+    /* left block is empty */
+    return 1;
+  } else if (rightTableBlockIndex > pSupporter->numOfBlocksPerMeter[rightTableIndex]) {
+    /* right block is empty */
+    return -1;
  }
-  assert(index >= 0 && index < pCheckInfo->compIndex[tid].numOfSuperBlocks);
+  STableBlockInfo* pLeftBlockInfoEx = &pSupporter->pDataBlockInfo[leftTableIndex][leftTableBlockIndex];
+  STableBlockInfo* pRightBlockInfoEx = &pSupporter->pDataBlockInfo[rightTableIndex][rightTableBlockIndex];
-  // load first data block into memory failed, caused by disk block error
+  //    assert(pLeftBlockInfoEx->pBlock.compBlock->offset != pRightBlockInfoEx->pBlock.compBlock->offset);
-  bool blockLoaded = false;
+  if (pLeftBlockInfoEx->pBlock.compBlock->offset == pRightBlockInfoEx->pBlock.compBlock->offset &&
-  SArray *sa = getDefaultLoadColumns(pQueryHandle, true);
+      pLeftBlockInfoEx->pBlock.compBlock->last == pRightBlockInfoEx->pBlock.compBlock->last) {
+    // todo add more information
+    dError("error in header file, two block with same offset:%p", pLeftBlockInfoEx->pBlock.compBlock->offset);
+  }
-  // todo no need to loaded at all
+  return pLeftBlockInfoEx->pBlock.compBlock->offset > pRightBlockInfoEx->pBlock.compBlock->offset ? 1 : -1;
-  cur->slot = index;
+}
-  SCompBlock* pBlock = &pCheckInfo->pCompInfo->blocks[cur->slot];
+int32_t createDataBlocksInfo(STsdbQueryHandle* pQueryHandle, int32_t numOfBlocks, int32_t* numOfAllocBlocks) {
-  SCompData*  data = calloc(1, sizeof(SCompData)+ sizeof(SCompCol)*pBlock->numOfCols);
+  char* tmp = realloc(pQueryHandle->pDataBlockInfo, sizeof(STableBlockInfo) * numOfBlocks);
+  if (tmp == NULL) {
+    return TSDB_CODE_SERV_OUT_OF_MEMORY;
+  }
-  data->numOfCols = pBlock->numOfCols;
+  pQueryHandle->pDataBlockInfo = (STableBlockInfo*)tmp;
-  data->uid = pCheckInfo->pTableObj->tableId.uid;
+  memset(pQueryHandle->pDataBlockInfo, 0, sizeof(STableBlockInfo) * numOfBlocks);
+  *numOfAllocBlocks = numOfBlocks;
-  pCheckInfo->pDataCols = tdNewDataCols(1000, 2, 4096);
+  int32_t numOfTables = taosArrayGetSize(pQueryHandle->pTableCheckInfo);
-  tdInitDataCols(pCheckInfo->pDataCols, pCheckInfo->pTableObj->schema);
-  SFile* pFile = &pCheckInfo->pFileGroup->files[TSDB_FILE_TYPE_DATA];
+  SBlockOrderSupporter sup = {0};
-  if (pFile->fd == FD_INITIALIZER) {
+  sup.numOfTables = numOfTables;
-    pFile->fd = open(pFile->fname, O_RDONLY);
+  sup.numOfBlocksPerMeter = calloc(1, sizeof(int32_t) * numOfTables);
+  sup.blockIndexArray = calloc(1, sizeof(int32_t) * numOfTables);
+  sup.pDataBlockInfo = calloc(1, POINTER_BYTES * numOfTables);
+  if (sup.numOfBlocksPerMeter == NULL || sup.blockIndexArray == NULL || sup.pDataBlockInfo == NULL) {
+    cleanBlockOrderSupporter(&sup, 0);
+    return TSDB_CODE_SERV_OUT_OF_MEMORY;
  }
-  if (tsdbLoadDataBlock(pFile, pBlock, 1, pCheckInfo->pDataCols, data) == 0) {
+  int32_t cnt = 0;
-    SDataBlockLoadInfo* pBlockLoadInfo = &pQueryHandle->dataBlockLoadInfo;
+  int32_t numOfQualMeters = 0;
-    pBlockLoadInfo->fileGroup = pCheckInfo->pFileGroup;
+  for (int32_t j = 0; j < numOfTables; ++j) {
-    pBlockLoadInfo->slot = pQueryHandle->cur.slot;
+    STableCheckInfo* pTableCheck = (STableCheckInfo*)taosArrayGet(pQueryHandle->pTableCheckInfo, j);
-    pBlockLoadInfo->sid = pCheckInfo->pTableObj->tableId.tid;
-    blockLoaded = true;
+    SCompBlock* pBlock = pTableCheck->pCompInfo->blocks;
+    sup.numOfBlocksPerMeter[numOfQualMeters] = pTableCheck->numOfBlocks;
+    char* buf = calloc(1, sizeof(STableBlockInfo) * pTableCheck->numOfBlocks);
+    if (buf == NULL) {
+      cleanBlockOrderSupporter(&sup, numOfQualMeters);
+      return TSDB_CODE_SERV_OUT_OF_MEMORY;
    }
-    //    dError("QInfo:%p fileId:%d total numOfBlks:%d blockId:%d load into memory failed due to error in disk files",
+    sup.pDataBlockInfo[numOfQualMeters] = (STableBlockInfo*)buf;
-    //           GET_QINFO_ADDR(pQuery), pQuery->fileId, pQuery->numOfBlocks, blkIdx);
-  // failed to load data from disk, abort current query
+    for (int32_t k = 0; k < pTableCheck->numOfBlocks; ++k) {
-  if (blockLoaded == false) {
+      STableBlockInfo* pBlockInfoEx = &sup.pDataBlockInfo[numOfQualMeters][k];
-    taosArrayDestroy(sa);
-    tfree(data);
-    return false;
+      pBlockInfoEx->pBlock.compBlock = &pBlock[k];
+      pBlockInfoEx->pBlock.fields = NULL;
+      pBlockInfoEx->pTableCheckInfo = pTableCheck;
+      //      pBlockInfoEx->groupIdx = pTableCheckInfo[j]->groupIdx;     // set the group index
+      //      pBlockInfoEx->blockIndex = pTableCheckInfo[j]->start + k;    // set the block index in original meter
+      cnt++;
    }
-  // todo search qualified points in blk, according to primary key (timestamp) column
+    numOfQualMeters++;
-  SDataCols* pDataCols = pCheckInfo->pDataCols;
+  }
-  TSKEY* d = (TSKEY*) pDataCols->cols[PRIMARYKEY_TIMESTAMP_COL_INDEX].pData;
+  dTrace("%p create data blocks info struct completed", pQueryHandle);
-  assert(d[0] == pBlock->keyFirst && d[pBlock->numOfPoints - 1] == pBlock->keyLast);
-  cur->pos = binarySearchForKey(pDataCols->cols[0].pData, pBlock->numOfPoints, key, pQueryHandle->order);
+  assert(cnt <= numOfBlocks && numOfQualMeters <= numOfTables);  // the pMeterDataInfo[j]->numOfBlocks may be 0
+  sup.numOfTables = numOfQualMeters;
+  SLoserTreeInfo* pTree = NULL;
-  cur->fid = pCheckInfo->pFileGroup->fileId;
+  uint8_t ret = tLoserTreeCreate(&pTree, sup.numOfTables, &sup, dataBlockOrderCompar);
-  assert(cur->pos >= 0 && cur->fid >= 0 && cur->slot >= 0);
+  if (ret != TSDB_CODE_SUCCESS) {
+    cleanBlockOrderSupporter(&sup, numOfTables);
+    return TSDB_CODE_SERV_OUT_OF_MEMORY;
+  }
-  filterDataInDataBlock(pQueryHandle, pCheckInfo->pDataCols, sa);
+  int32_t numOfTotal = 0;
-  taosArrayDestroy(sa);
+  while (numOfTotal < cnt) {
-  tfree(data);
+    int32_t pos = pTree->pNode[0].index;
-  return pQueryHandle->realNumOfRows > 0;
+    int32_t index = sup.blockIndexArray[pos]++;
+    STableBlockInfo* pBlocksInfoEx = sup.pDataBlockInfo[pos];
+    pQueryHandle->pDataBlockInfo[numOfTotal++] = pBlocksInfoEx[index];
+    // set data block index overflow, in order to disable the offset comparator
+    if (sup.blockIndexArray[pos] >= sup.numOfBlocksPerMeter[pos]) {
+      sup.blockIndexArray[pos] = sup.numOfBlocksPerMeter[pos] + 1;
+    }
+    tLoserTreeAdjust(pTree, pos + sup.numOfTables);
+  }
+  /*
+   * available when no import exists
+   * for(int32_t i = 0; i < cnt - 1; ++i) {
+   *   assert((*pDataBlockInfo)[i].pBlock.compBlock->offset < (*pDataBlockInfo)[i+1].pBlock.compBlock->offset);
+   * }
+   */
+  dTrace("%p %d data blocks sort completed", pQueryHandle, cnt);
+  cleanBlockOrderSupporter(&sup, numOfTables);
+  free(pTree);
+  return TSDB_CODE_SUCCESS;
 }
-static bool hasMoreDataInFileForSingleTableModel(STsdbQueryHandle* pHandle) {
+static bool getDataBlocksInFiles(STsdbQueryHandle* pQueryHandle) {
-  assert(pHandle->activeIndex == 0 && taosArrayGetSize(pHandle->pTableCheckInfo) == 1);
+  STsdbFileH*    pFileHandle = tsdbGetFile(pQueryHandle->pTsdb);
+  SQueryFilePos* cur = &pQueryHandle->cur;
-  STsdbFileH* pFileHandle = tsdbGetFile(pHandle->pTsdb);
+  // find the start data block in file
-  STableCheckInfo* pCheckInfo = taosArrayGet(pHandle->pTableCheckInfo, pHandle->activeIndex);
+  if (!pQueryHandle->locateStart) {
+    pQueryHandle->locateStart = true;
-  if (!pCheckInfo->checkFirstFileBlock) {
+    int32_t fid = getFileIdFromKey(pQueryHandle->window.skey);
-    pCheckInfo->checkFirstFileBlock = true;
-    if (pFileHandle != NULL) {
+    tsdbInitFileGroupIter(pFileHandle, &pQueryHandle->fileIter, TSDB_FGROUP_ITER_FORWARD);
-      bool found = getQualifiedDataBlock(pHandle, pCheckInfo, 1);
+    tsdbSeekFileGroupIter(&pQueryHandle->fileIter, fid);
-      if (found) {
-        return true;
+    int32_t numOfBlocks = -1;
+    // todo opt for only one table case
+    pQueryHandle->numOfBlocks = 0;
+    int32_t numOfTables = taosArrayGetSize(pQueryHandle->pTableCheckInfo);
+    while ((pQueryHandle->pFileGroup = tsdbGetFileGroupNext(&pQueryHandle->fileIter)) != NULL) {
+      if (getFileCompInfo(pQueryHandle, &numOfBlocks, 1) != TSDB_CODE_SUCCESS) {
+        break;
      }
+      assert(numOfBlocks >= 0);
+      dTrace("%p %d blocks found in file for %d table(s), fid:%d", pQueryHandle, numOfBlocks,
+             pQueryHandle->pFileGroup->fileId, numOfTables);
+      // todo return error code to query engine
+      if (createDataBlocksInfo(pQueryHandle, numOfBlocks, &pQueryHandle->numOfBlocks) != TSDB_CODE_SUCCESS) {
+        break;
      }
-    // no data in file, try cache
+      assert(numOfBlocks >= pQueryHandle->numOfBlocks);
-    pHandle->cur.fid = -1;
+      if (pQueryHandle->numOfBlocks > 0) {
-    return hasMoreDataInCacheForSingleModel(pHandle);
+        break;
-  } else { // move to next data block in file or in cache
+      }
-    return moveToNextBlock(pHandle, 1);
    }
-}
-static bool hasMoreDataInCacheForMultiModel(STsdbQueryHandle* pHandle) {
+    // no data in file anymore
-  size_t numOfTables = taosArrayGetSize(pHandle->pTableCheckInfo);
+    if (pQueryHandle->numOfBlocks <= 0) {
-  assert(numOfTables > 0);
+      assert(pQueryHandle->pFileGroup == NULL);
+      cur->fid = -1;
-  while(pHandle->activeIndex < numOfTables) {
+      return false;
-    STableCheckInfo* pTableCheckInfo = taosArrayGet(pHandle->pTableCheckInfo, pHandle->activeIndex);
+    }
-    STable *pTable = pTableCheckInfo->pTableObj;
+    cur->slot = 0;
-    if (pTable->mem == NULL && pTable->imem == NULL) {
+    cur->fid = pQueryHandle->pFileGroup->fileId;
-      pHandle->activeIndex += 1;  // try next table if exits
-      continue;
+    STableBlockInfo* pBlockInfo = &pQueryHandle->pDataBlockInfo[cur->slot];
+    STableCheckInfo* pCheckInfo = pBlockInfo->pTableCheckInfo;
+    SCompBlock*      pBlock = pBlockInfo->pBlock.compBlock;
+    return loadFileDataBlock(pQueryHandle, pBlock, pCheckInfo);
+  } else {
+    if (cur->slot == pQueryHandle->numOfBlocks - 1) { // all blocks
+      int32_t numOfBlocks = -1;
+      int32_t numOfTables = taosArrayGetSize(pQueryHandle->pTableCheckInfo);
+      pQueryHandle->numOfBlocks = 0;
+      while ((pQueryHandle->pFileGroup = tsdbGetFileGroupNext(&pQueryHandle->fileIter)) != NULL) {
+        if (getFileCompInfo(pQueryHandle, &numOfBlocks, 1) != TSDB_CODE_SUCCESS) {
+          break;
        }
-    // all data in mem are checked already.
+        assert(numOfBlocks >= 0);
-    if (pTableCheckInfo->lastKey > pTable->mem->keyLast) {
+        dTrace("%p %d blocks found in file for %d table(s), fid:%d", pQueryHandle, numOfBlocks, numOfTables,
-      pHandle->activeIndex += 1;  // try next table if exits
+               pQueryHandle->pFileGroup->fileId);
-      continue;
+        // todo return error code to query engine
+        if (createDataBlocksInfo(pQueryHandle, numOfBlocks, &pQueryHandle->numOfBlocks) != TSDB_CODE_SUCCESS) {
+          break;
        }
-    return true;
+        assert(numOfBlocks >= pQueryHandle->numOfBlocks);
+        if (pQueryHandle->numOfBlocks > 0) {
+          break;
+        }
      }
-  // all tables has checked already
+      // no data in file anymore
+      if (pQueryHandle->numOfBlocks <= 0) {
+        assert(pQueryHandle->pFileGroup == NULL);
+        cur->fid = -1;
        return false;
+      }
+      cur->slot = 0;
+      cur->fid = pQueryHandle->pFileGroup->fileId;
+      STableBlockInfo* pBlockInfo = &pQueryHandle->pDataBlockInfo[cur->slot];
+      STableCheckInfo* pCheckInfo = pBlockInfo->pTableCheckInfo;
+      SCompBlock*      pBlock = pBlockInfo->pBlock.compBlock;
+      return loadFileDataBlock(pQueryHandle, pBlock, pCheckInfo);
+    } else {  // next block of the same file
+      cur->slot += 1;
+      cur->pos = 0;
+      STableBlockInfo* pBlockInfo = &pQueryHandle->pDataBlockInfo[cur->slot];
+      return loadFileDataBlock(pQueryHandle, pBlockInfo->pBlock.compBlock, pBlockInfo->pTableCheckInfo);
+    }
+  }
 }
 // handle data in cache situation
-bool tsdbNextDataBlock(tsdb_query_handle_t *pQueryHandle) {
+bool tsdbNextDataBlock(tsdb_query_handle_t* pQueryHandle) {
-  STsdbQueryHandle* pHandle = (STsdbQueryHandle*) pQueryHandle;
+  STsdbQueryHandle* pHandle = (STsdbQueryHandle*)pQueryHandle;
-  if (pHandle->model == SINGLE_TABLE_MODEL) {
-    return hasMoreDataInFileForSingleTableModel(pHandle);
+  size_t numOfTables = taosArrayGetSize(pHandle->pTableCheckInfo);
+  assert(numOfTables > 0);
+  if (pHandle->checkFiles) {
+    if (getDataBlocksInFiles(pHandle)) {
+      return true;
+    }
+    pHandle->activeIndex = 0;
+    pHandle->checkFiles = 0;
+    while (pHandle->activeIndex < numOfTables) {
+      if (hasMoreDataInCache(pHandle)) {
+        return true;
+      }
+      pHandle->activeIndex += 1;
+    }
+    return false;
  } else {
-    return hasMoreDataInCacheForMultiModel(pHandle);
+    while (pHandle->activeIndex < numOfTables) {
+      if (hasMoreDataInCache(pHandle)) {
+        return true;
+      }
+      pHandle->activeIndex += 1;
+    }
+    return false;
  }
 }
-static int tsdbReadRowsFromCache(SSkipListIterator *pIter, TSKEY maxKey, int maxRowsToRead,
+static int tsdbReadRowsFromCache(SSkipListIterator* pIter, TSKEY maxKey, int maxRowsToRead, TSKEY* skey, TSKEY* ekey,
-    TSKEY* skey, TSKEY* ekey, STsdbQueryHandle* pHandle) {
+                                 STsdbQueryHandle* pHandle) {
  int     numOfRows = 0;
  int32_t numOfCols = taosArrayGetSize(pHandle->pColumns);
  *skey = INT64_MIN;
-  while(tSkipListIterNext(pIter)) {
+  while (tSkipListIterNext(pIter)) {
-    SSkipListNode *node = tSkipListIterGet(pIter);
+    SSkipListNode* node = tSkipListIterGet(pIter);
    if (node == NULL) break;
    SDataRow row = SL_GET_NODE_DATA(node);
@@ -855,9 +1066,9 @@ static int tsdbReadRowsFromCache(SSkipListIterator *pIter, TSKEY maxKey, int max
    *ekey = dataRowKey(row);
    int32_t offset = 0;
-    for(int32_t i = 0; i < numOfCols; ++i) {
+    for (int32_t i = 0; i < numOfCols; ++i) {
      SColumnInfoEx* pColInfo = taosArrayGet(pHandle->pColumns, i);
-      memcpy(pColInfo->pData + numOfRows*pColInfo->info.bytes, dataRowTuple(row) + offset, pColInfo->info.bytes);
+      memcpy(pColInfo->pData + numOfRows * pColInfo->info.bytes, dataRowTuple(row) + offset, pColInfo->info.bytes);
      offset += pColInfo->info.bytes;
    }
@@ -869,19 +1080,23 @@ static int tsdbReadRowsFromCache(SSkipListIterator *pIter, TSKEY maxKey, int max
 }
 // copy data from cache into data block
-SDataBlockInfo tsdbRetrieveDataBlockInfo(tsdb_query_handle_t *pQueryHandle) {
+SDataBlockInfo tsdbRetrieveDataBlockInfo(tsdb_query_handle_t* pQueryHandle) {
-  STsdbQueryHandle* pHandle = (STsdbQueryHandle*) pQueryHandle;
+  STsdbQueryHandle* pHandle = (STsdbQueryHandle*)pQueryHandle;
-  STableCheckInfo* pCheckInfo = taosArrayGet(pHandle->pTableCheckInfo, pHandle->activeIndex);
+  STable* pTable = NULL;
-  STable *pTable = pCheckInfo->pTableObj;
  TSKEY   skey = 0, ekey = 0;
  int32_t rows = 0;
  // data in file
-  if (pHandle->cur.fid > 0) {
+  if (pHandle->cur.fid >= 0) {
-    SDataBlockInfo binfo = getTrueDataBlockInfo(pHandle, pCheckInfo);
+    STableBlockInfo* pBlockInfo = &pHandle->pDataBlockInfo[pHandle->cur.slot];
-    if (binfo.size == pHandle->realNumOfRows) {
+    pTable = pBlockInfo->pTableCheckInfo->pTableObj;
+    SDataBlockInfo binfo = getTrueDataBlockInfo(pBlockInfo->pTableCheckInfo, pBlockInfo->pBlock.compBlock);
+    if (binfo.rows == pHandle->realNumOfRows) {
+      pBlockInfo->pTableCheckInfo->lastKey = pBlockInfo->pBlock.compBlock->keyLast + 1;
      return binfo;
    } else {
      /* not a whole disk block, only the qualified rows, so this block is loaded in to buffer during the
@@ -890,64 +1105,70 @@ SDataBlockInfo tsdbRetrieveDataBlockInfo(tsdb_query_handle_t *pQueryHandle) {
      SColumnInfoEx* pColInfoEx = taosArrayGet(pHandle->pColumns, 0);
      rows = pHandle->realNumOfRows;
-      skey = *(TSKEY*) pColInfoEx->pData;
+      skey = *(TSKEY*)pColInfoEx->pData;
-      ekey = *(TSKEY*) ((char*)pColInfoEx->pData + TSDB_KEYSIZE * (rows - 1));
+      ekey = *(TSKEY*)((char*)pColInfoEx->pData + TSDB_KEYSIZE * (rows - 1));
+      // update the last key value
+      pBlockInfo->pTableCheckInfo->lastKey = ekey + 1;
    }
  } else {
+    STableCheckInfo* pCheckInfo = taosArrayGet(pHandle->pTableCheckInfo, pHandle->activeIndex);
+    pTable = pCheckInfo->pTableObj;
    if (pTable->mem != NULL) {
      // create mem table iterator if it is not created yet
      if (pCheckInfo->iter == NULL) {
        pCheckInfo->iter = tSkipListCreateIter(pTable->mem->pData);
      }
      rows = tsdbReadRowsFromCache(pCheckInfo->iter, INT64_MAX, 2, &skey, &ekey, pHandle);
+      // update the last key value
+      pCheckInfo->lastKey = ekey + 1;
    }
  }
  SDataBlockInfo blockInfo = {
-    .uid = pTable->tableId.uid,
+      .uid = pTable->tableId.uid, .sid = pTable->tableId.tid, .rows = rows, .window = {.skey = skey, .ekey = ekey}};
-    .sid = pTable->tableId.tid,
-    .size = rows,
-    .window = {.skey = skey, .ekey = ekey}
-  };
-  // update the last key value
-  pCheckInfo->lastKey = ekey + 1;
  return blockInfo;
 }
 // return null for data block in cache
-int32_t tsdbRetrieveDataBlockStatisInfo(tsdb_query_handle_t *pQueryHandle, SDataStatis **pBlockStatis) {
+int32_t tsdbRetrieveDataBlockStatisInfo(tsdb_query_handle_t* pQueryHandle, SDataStatis** pBlockStatis) {
  *pBlockStatis = NULL;
  return TSDB_CODE_SUCCESS;
 }
-SArray *tsdbRetrieveDataBlock(tsdb_query_handle_t *pQueryHandle, SArray *pIdList) {
+SArray* tsdbRetrieveDataBlock(tsdb_query_handle_t* pQueryHandle, SArray* pIdList) {
  /**
   * In the following two cases, the data has been loaded to SColumnInfoEx.
   * 1. data is from cache, 2. data block is not completed qualified to query time range
   */
-  STsdbQueryHandle* pHandle = (STsdbQueryHandle*) pQueryHandle;
+  STsdbQueryHandle* pHandle = (STsdbQueryHandle*)pQueryHandle;
  if (pHandle->cur.fid < 0) {
    return pHandle->pColumns;
  } else {
-    STableCheckInfo* pCheckInfo = taosArrayGet(pHandle->pTableCheckInfo, pHandle->activeIndex);
+    STableBlockInfo* pBlockInfoEx = &pHandle->pDataBlockInfo[pHandle->cur.slot];
+    STableCheckInfo*   pCheckInfo = pBlockInfoEx->pTableCheckInfo;
-    SDataBlockInfo binfo = getTrueDataBlockInfo(pHandle, pCheckInfo);
+    SDataBlockInfo binfo = getTrueDataBlockInfo(pCheckInfo, pBlockInfoEx->pBlock.compBlock);
-    assert(pHandle->realNumOfRows <= binfo.size);
+    assert(pHandle->realNumOfRows <= binfo.rows);
-    if (pHandle->realNumOfRows < binfo.size) {
+    if (pHandle->realNumOfRows < binfo.rows) {
      return pHandle->pColumns;
    } else {
-      SArray *sa = getDefaultLoadColumns(pHandle, true);
      // data block has been loaded, todo extract method
      SDataBlockLoadInfo* pBlockLoadInfo = &pHandle->dataBlockLoadInfo;
      if (pBlockLoadInfo->slot == pHandle->cur.slot && pBlockLoadInfo->sid == pCheckInfo->pTableObj->tableId.tid) {
        return pHandle->pColumns;
      } else {
-        doLoadDataFromFileBlock(pHandle);
+        SCompBlock* pBlock = pBlockInfoEx->pBlock.compBlock;
-        filterDataInDataBlock(pHandle, pCheckInfo->pDataCols, sa);
+        doLoadFileDataBlock(pHandle, pBlock, pCheckInfo);
+        SArray* sa = getDefaultLoadColumns(pHandle, true);
+        filterDataInDataBlock(pHandle, pCheckInfo, pBlock, sa);
+        taosArrayDestroy(sa);
        return pHandle->pColumns;
      }
@@ -955,62 +1176,60 @@ SArray *tsdbRetrieveDataBlock(tsdb_query_handle_t *pQueryHandle, SArray *pIdList
  }
 }
-int32_t tsdbResetQuery(tsdb_query_handle_t *pQueryHandle, STimeWindow *window, tsdbpos_t position, int16_t order) {
+int32_t tsdbResetQuery(tsdb_query_handle_t* pQueryHandle, STimeWindow* window, tsdbpos_t position, int16_t order) {
  return 0;
 }
-int32_t tsdbDataBlockSeek(tsdb_query_handle_t *pQueryHandle, tsdbpos_t pos) { return 0;}
+int32_t tsdbDataBlockSeek(tsdb_query_handle_t* pQueryHandle, tsdbpos_t pos) { return 0; }
-tsdbpos_t tsdbDataBlockTell(tsdb_query_handle_t *pQueryHandle) { return NULL; }
+tsdbpos_t tsdbDataBlockTell(tsdb_query_handle_t* pQueryHandle) { return NULL; }
-SArray *tsdbRetrieveDataRow(tsdb_query_handle_t *pQueryHandle, SArray *pIdList, SQueryRowCond *pCond) { return NULL;}
+SArray* tsdbRetrieveDataRow(tsdb_query_handle_t* pQueryHandle, SArray* pIdList, SQueryRowCond* pCond) { return NULL; }
-tsdb_query_handle_t *tsdbQueryFromTagConds(STsdbQueryCond *pCond, int16_t stableId, const char *pTagFilterStr) {
+tsdb_query_handle_t* tsdbQueryFromTagConds(STsdbQueryCond* pCond, int16_t stableId, const char* pTagFilterStr) {
  return NULL;
 }
-SArray *tsdbGetTableList(tsdb_query_handle_t *pQueryHandle) { return NULL; }
+SArray* tsdbGetTableList(tsdb_query_handle_t* pQueryHandle) { return NULL; }
-static SArray* createTableIdArrayList(STsdbRepo* tsdb, int64_t uid) {
+static int32_t getAllTableIdList(STsdbRepo* tsdb, int64_t uid, SArray* list) {
  STable* pTable = tsdbGetTableByUid(tsdbGetMeta(tsdb), uid);
-  assert(pTable != NULL);  //assert pTable is a super table
+  assert(pTable != NULL);  // assert pTable is a super table
-  size_t size = tSkipListGetSize(pTable->pIndex);
-  SArray* pList = taosArrayInit(size, sizeof(STableId));
  SSkipListIterator* iter = tSkipListCreateIter(pTable->pIndex);
-  while(tSkipListIterNext(iter)) {
+  while (tSkipListIterNext(iter)) {
    SSkipListNode* pNode = tSkipListIterGet(iter);
-    STable* t = *(STable**) SL_GET_NODE_DATA(pNode);
+    STable*        t = *(STable**)SL_GET_NODE_DATA(pNode);
-    taosArrayPush(pList, &t->tableId);
+    taosArrayPush(list, &t->tableId);
  }
-  return pList;
+  return TSDB_CODE_SUCCESS;
 }
-typedef struct SSyntaxTreeFilterSupporter {
+typedef struct SExprTreeSupporter {
  SSchema* pTagSchema;
  int32_t  numOfTags;
  int32_t  optr;
-} SSyntaxTreeFilterSupporter;
+} SExprTreeSupporter;
 /**
- * convert the result pointer to STabObj instead of tSkipListNode
+ * convert the result pointer to table id instead of table object pointer
 * @param pRes
 */
-static UNUSED_FUNC void tansformQueryResult(SArray* pRes) {
+static void convertQueryResult(SArray* pRes, SArray* pTableList) {
-  if (pRes == NULL || taosArrayGetSize(pRes) == 0) {
+  if (pTableList == NULL || taosArrayGetSize(pTableList) == 0) {
    return;
  }
-  size_t size = taosArrayGetSize(pRes);
+  size_t size = taosArrayGetSize(pTableList);
  for (int32_t i = 0; i < size; ++i) {
-//    pRes->pRes[i] = ((tSkipListNode*)(pRes->pRes[i]))->pData;
+    STable* pTable = taosArrayGetP(pTableList, i);
+    taosArrayPush(pRes, &pTable->tableId);
  }
 }
-void tSQLListTraverseDestroyInfo(void* param) {
+void destroyHelper(void* param) {
  if (param == NULL) {
    return;
  }
@@ -1020,57 +1239,7 @@ void tSQLListTraverseDestroyInfo(void* param) {
  free(param);
 }
-static char* convertTagQueryStr(const wchar_t* str, size_t len) {
+static UNUSED_FUNC int32_t compareStrPatternComp(const void* pLeft, const void* pRight) {
-  char* mbs = NULL;
-  if (len > 0) {
-    mbs = calloc(1, (len + 1) * TSDB_NCHAR_SIZE);
-    taosUcs4ToMbs((void*) str, len * TSDB_NCHAR_SIZE, mbs); //todo add log
-  }
-  return mbs;
-}
-static int32_t compareStrVal(const void* pLeft, const void* pRight) {
-  int32_t ret = strcmp(pLeft, pRight);
-  if (ret == 0) {
-    return 0;
-  } else {
-    return ret > 0 ? 1 : -1;
-  }
-}
-static int32_t compareWStrVal(const void* pLeft, const void* pRight) {
-  int32_t ret = wcscmp(pLeft, pRight);
-  if (ret == 0) {
-    return 0;
-  } else {
-    return ret > 0 ? 1 : -1;
-  }
-}
-static int32_t compareIntVal(const void* pLeft, const void* pRight) {
-  DEFAULT_COMP(GET_INT64_VAL(pLeft), GET_INT64_VAL(pRight));
-}
-static int32_t compareIntDoubleVal(const void* pLeft, const void* pRight) {
-  DEFAULT_COMP(GET_INT64_VAL(pLeft), GET_DOUBLE_VAL(pRight));
-}
-static int32_t compareDoubleVal(const void* pLeft, const void* pRight) {
-  DEFAULT_COMP(GET_DOUBLE_VAL(pLeft), GET_DOUBLE_VAL(pRight));
-}
-static int32_t compareDoubleIntVal(const void* pLeft, const void* pRight) {
-  double ret = (*(double*)pLeft) - (*(int64_t*)pRight);
-  if (fabs(ret) < DBL_EPSILON) {
-    return 0;
-  } else {
-    return ret > 0 ? 1 : -1;
-  }
-}
-static int32_t compareStrPatternComp(const void* pLeft, const void* pRight) {
  SPatternCompareInfo pInfo = {'%', '_'};
  const char* pattern = pRight;
@@ -1081,7 +1250,7 @@ static int32_t compareStrPatternComp(const void* pLeft, const void* pRight) {
  return (ret == TSDB_PATTERN_MATCH) ? 0 : 1;
 }
-static int32_t compareWStrPatternComp(const void* pLeft, const void* pRight) {
+static UNUSED_FUNC int32_t compareWStrPatternComp(const void* pLeft, const void* pRight) {
  SPatternCompareInfo pInfo = {'%', '_'};
  const wchar_t* pattern = pRight;
@@ -1092,66 +1261,65 @@ static int32_t compareWStrPatternComp(const void* pLeft, const void* pRight) {
  return (ret == TSDB_PATTERN_MATCH) ? 0 : 1;
 }
-static __compar_fn_t getFilterComparator(int32_t type, int32_t filterType, int32_t optr) {
+// static __compar_fn_t getFilterComparator(int32_t type, int32_t filterType, int32_t optr) {
-  __compar_fn_t comparator = NULL;
+//  __compar_fn_t comparator = NULL;
+//
-  switch (type) {
+//  switch (type) {
-    case TSDB_DATA_TYPE_TINYINT:
+//    case TSDB_DATA_TYPE_TINYINT:
-    case TSDB_DATA_TYPE_SMALLINT:
+//    case TSDB_DATA_TYPE_SMALLINT:
-    case TSDB_DATA_TYPE_INT:
+//    case TSDB_DATA_TYPE_INT:
-    case TSDB_DATA_TYPE_BIGINT:
+//    case TSDB_DATA_TYPE_BIGINT:
-    case TSDB_DATA_TYPE_BOOL: {
+//    case TSDB_DATA_TYPE_BOOL: {
-      if (filterType >= TSDB_DATA_TYPE_BOOL && filterType <= TSDB_DATA_TYPE_BIGINT) {
+//      if (filterType >= TSDB_DATA_TYPE_BOOL && filterType <= TSDB_DATA_TYPE_BIGINT) {
-        comparator = compareIntVal;
+//        comparator = compareIntVal;
-      } else if (filterType >= TSDB_DATA_TYPE_FLOAT && filterType <= TSDB_DATA_TYPE_DOUBLE) {
+//      } else if (filterType >= TSDB_DATA_TYPE_FLOAT && filterType <= TSDB_DATA_TYPE_DOUBLE) {
-        comparator = compareIntDoubleVal;
+//        comparator = compareIntDoubleVal;
-      }
+//      }
-      break;
+//      break;
-    }
+//    }
+//
-    case TSDB_DATA_TYPE_FLOAT:
+//    case TSDB_DATA_TYPE_FLOAT:
-    case TSDB_DATA_TYPE_DOUBLE: {
+//    case TSDB_DATA_TYPE_DOUBLE: {
-      if (filterType >= TSDB_DATA_TYPE_BOOL && filterType <= TSDB_DATA_TYPE_BIGINT) {
+//      if (filterType >= TSDB_DATA_TYPE_BOOL && filterType <= TSDB_DATA_TYPE_BIGINT) {
-        comparator = compareDoubleIntVal;
+//        comparator = compareDoubleIntVal;
-      } else if (filterType >= TSDB_DATA_TYPE_FLOAT && filterType <= TSDB_DATA_TYPE_DOUBLE) {
+//      } else if (filterType >= TSDB_DATA_TYPE_FLOAT && filterType <= TSDB_DATA_TYPE_DOUBLE) {
-        comparator = compareDoubleVal;
+//        comparator = compareDoubleVal;
-      }
+//      }
-      break;
+//      break;
-    }
+//    }
+//
-    case TSDB_DATA_TYPE_BINARY: {
+//    case TSDB_DATA_TYPE_BINARY: {
-      assert(filterType == TSDB_DATA_TYPE_BINARY);
+//      assert(filterType == TSDB_DATA_TYPE_BINARY);
+//
-      if (optr == TSDB_RELATION_LIKE) { /* wildcard query using like operator */
+//      if (optr == TSDB_RELATION_LIKE) { /* wildcard query using like operator */
-        comparator = compareStrPatternComp;
+//        comparator = compareStrPatternComp;
-      } else { /* normal relational comparator */
+//      } else { /* normal relational comparator */
-        comparator = compareStrVal;
+//        comparator = compareStrVal;
-      }
+//      }
+//
-      break;
+//      break;
-    }
+//    }
+//
-    case TSDB_DATA_TYPE_NCHAR: {
+//    case TSDB_DATA_TYPE_NCHAR: {
-      assert(filterType == TSDB_DATA_TYPE_NCHAR);
+//      assert(filterType == TSDB_DATA_TYPE_NCHAR);
+//
-      if (optr == TSDB_RELATION_LIKE) {
+//      if (optr == TSDB_RELATION_LIKE) {
-        comparator = compareWStrPatternComp;
+//        comparator = compareWStrPatternComp;
-      } else {
+//      } else {
-        comparator = compareWStrVal;
+//        comparator = compareWStrVal;
-      }
+//      }
+//
-      break;
+//      break;
-    }
+//    }
-    default:
+//    default:
-      comparator = compareIntVal;
+//      comparator = compareIntVal;
-      break;
+//      break;
-  }
+//  }
+//
-  return comparator;
+//  return comparator;
-}
+//}
-static void getTagColumnInfo(SSyntaxTreeFilterSupporter* pSupporter, SSchema* pSchema, int32_t* index,
+static void getTagColumnInfo(SExprTreeSupporter* pSupporter, SSchema* pSchema, int32_t* index, int32_t* offset) {
-                             int32_t* offset) {
  *index = 0;
  *offset = 0;
@@ -1165,7 +1333,7 @@ static void getTagColumnInfo(SSyntaxTreeFilterSupporter* pSupporter, SSchema* pS
  while ((*index) < pSupporter->numOfTags) {
    if (pSupporter->pTagSchema[*index].bytes == pSchema->bytes &&
        pSupporter->pTagSchema[*index].type == pSchema->type &&
-        strcmp(pSupporter->pTagSchema[*index].name, pSchema->name) == 0) {
+        pSupporter->pTagSchema[*index].colId == pSchema->colId) {
      break;
    } else {
      (*offset) += pSupporter->pTagSchema[(*index)++].bytes;
@@ -1174,7 +1342,7 @@ static void getTagColumnInfo(SSyntaxTreeFilterSupporter* pSupporter, SSchema* pS
 }
 void filterPrepare(void* expr, void* param) {
-  tExprNode *pExpr = (tExprNode*) expr;
+  tExprNode* pExpr = (tExprNode*)expr;
  if (pExpr->_node.info != NULL) {
    return;
  }
@@ -1184,7 +1352,7 @@ void filterPrepare(void* expr, void* param) {
  tQueryInfo* pInfo = pExpr->_node.info;
-  SSyntaxTreeFilterSupporter* pSupporter = (SSyntaxTreeFilterSupporter*)param;
+  SExprTreeSupporter* pSupporter = (SExprTreeSupporter*)param;
  tVariant* pCond = pExpr->_node.pRight->pVal;
  SSchema*  pSchema = pExpr->_node.pLeft->pSchema;
@@ -1194,10 +1362,10 @@ void filterPrepare(void* expr, void* param) {
  assert((offset >= 0 && offset < TSDB_MAX_TAGS_LEN) || (offset == TSDB_TBNAME_COLUMN_INDEX));
  pInfo->sch = *pSchema;
-  pInfo->colIdx = i;
+  pInfo->colIndex = i;
  pInfo->optr = pExpr->_node.optr;
  pInfo->offset = offset;
-  pInfo->compare = getFilterComparator(pSchema->type, pCond->nType, pInfo->optr);
+  //  pInfo->compare  = getFilterComparator(pSchema->type, pCond->nType, pInfo->optr);
  tVariantAssign(&pInfo->q, pCond);
  tVariantTypeSetType(&pInfo->q, pInfo->sch.type);
@@ -1216,7 +1384,7 @@ bool tSkipListNodeFilterCallback(const void* pNode, void* param) {
    ret = pInfo->compare(val, pInfo->q.pz);
  } else {
    tVariant t = {0};
-    tVariantCreateFromBinary(&t, val, (uint32_t) pInfo->sch.bytes, type);
+    tVariantCreateFromBinary(&t, val, (uint32_t)pInfo->sch.bytes, type);
    ret = pInfo->compare(&t.i64Key, &pInfo->q.i64Key);
  }
@@ -1228,10 +1396,10 @@ bool tSkipListNodeFilterCallback(const void* pNode, void* param) {
    case TSDB_RELATION_NOT_EQUAL: {
      return ret != 0;
    }
-    case TSDB_RELATION_LARGE_EQUAL: {
+    case TSDB_RELATION_GREATER_EQUAL: {
      return ret >= 0;
    }
-    case TSDB_RELATION_LARGE: {
+    case TSDB_RELATION_GREATER: {
      return ret > 0;
    }
    case TSDB_RELATION_LESS_EQUAL: {
@@ -1250,59 +1418,55 @@ bool tSkipListNodeFilterCallback(const void* pNode, void* param) {
  return true;
 }
-static int32_t doQueryTableList(STable* pSTable, SArray* pRes, const char* pCond) {
+static int32_t doQueryTableList(STable* pSTable, SArray* pRes, tExprNode* pExpr) {
-//  STColumn* stcol = schemaColAt(pSTable->tagSchema, 0);
+  // query according to the binary expression
+  STSchema* pSchema = pSTable->tagSchema;
+  SSchema*  schema = calloc(schemaNCols(pSchema), sizeof(SSchema));
+  for (int32_t i = 0; i < schemaNCols(pSchema); ++i) {
+    schema[i].colId = schemaColAt(pSchema, i)->colId;
+    schema[i].type = schemaColAt(pSchema, i)->type;
+    schema[i].bytes = schemaColAt(pSchema, i)->bytes;
+  }
-  tExprNode* pExpr = NULL;
+  SExprTreeSupporter s = {.pTagSchema = schema, .numOfTags = schemaNCols(pSTable->tagSchema)};
-//  tSQLBinaryExprFromString(&pExpr, stcol, schemaNCols(pSTable->tagSchema), (char*) pCond, strlen(pCond));
-  // failed to build expression, no result, return immediately
+  SBinaryFilterSupp supp = {
-  if (pExpr == NULL) {
+      .fp = (__result_filter_fn_t)tSkipListNodeFilterCallback, .setupInfoFn = filterPrepare, .pExtInfo = &s};
-    mError("table:%" PRIu64 ", no result returned, error in super table query expression:%s", pSTable->tableId.uid, pCond);
-    tfree(pCond);
-    return TSDB_CODE_OPS_NOT_SUPPORT;
+  SArray* pTableList = taosArrayInit(8, POINTER_BYTES);
-  }
-  // query according to the binary expression
+  tExprTreeTraverse(pExpr, pSTable->pIndex, pTableList, &supp);
-//  SSyntaxTreeFilterSupporter s = {.pTagSchema = stcol, .numOfTags = schemaNCols(pSTable->tagSchema)};
+  tExprTreeDestroy(&pExpr, destroyHelper);
-//
-//  SBinaryFilterSupp supp = {
-//      .fp = (__result_filter_fn_t)tSkipListNodeFilterCallback,
-//      .setupInfoFn = (__do_filter_suppl_fn_t)filterPrepare,
-//      .pExtInfo = &s
-//  };
-//
-//  tSQLBinaryExprTraverse(pExpr, pSTable->pIndex, pRes, &supp);
-//  tExprTreeDestroy(&pExpr, tSQLListTraverseDestroyInfo);
-//
-//  tansformQueryResult(pRes);
+  convertQueryResult(pRes, pTableList);
  return TSDB_CODE_SUCCESS;
 }
-SArray *tsdbQueryTableList(tsdb_repo_t* tsdb, int64_t uid, const wchar_t *pTagCond, size_t len) {
+int32_t tsdbQueryTags(tsdb_repo_t* tsdb, int64_t uid, const char* pTagCond, size_t len, SArray* res) {
-  // no condition, all tables created according to the stable will involved in querying
+  if (pTagCond == NULL || len == 0) {  // no condition, all tables created according to this stable are involved
-  SArray* result = taosArrayInit(8, POINTER_BYTES);
+    return getAllTableIdList(tsdb, uid, res);
+  }
-  if (pTagCond == NULL || wcslen(pTagCond) == 0) {
-    return createTableIdArrayList(tsdb, uid);
-  } else {
-    char* str = convertTagQueryStr(pTagCond, len);
  STable* pSTable = tsdbGetTableByUid(tsdbGetMeta(tsdb), uid);
  assert(pSTable != NULL);
-    doQueryTableList(pSTable, result, str);
+  tExprNode* pExprNode = NULL;
-    return result;
+  int32_t    ret = TSDB_CODE_SUCCESS;
+  // failed to build expression, no result, return immediately
+  if ((ret = exprTreeFromBinary(pTagCond, len, &pExprNode) != TSDB_CODE_SUCCESS) || (pExprNode == NULL)) {
+    dError("stable:%" PRIu64 ", failed to deserialize expression tree, error exists", uid);
+    return ret;
  }
+  return doQueryTableList(pSTable, res, pExprNode);
 }
 void tsdbCleanupQueryHandle(tsdb_query_handle_t queryHandle) {
-  STsdbQueryHandle* pQueryHandle = (STsdbQueryHandle*) queryHandle;
+  STsdbQueryHandle* pQueryHandle = (STsdbQueryHandle*)queryHandle;
  size_t size = taosArrayGetSize(pQueryHandle->pTableCheckInfo);
-  for(int32_t i = 0; i < size; ++i) {
+  for (int32_t i = 0; i < size; ++i) {
    STableCheckInfo* pTableCheckInfo = taosArrayGet(pQueryHandle->pTableCheckInfo, i);
    tSkipListDestroyIter(pTableCheckInfo->iter);
@@ -1313,20 +1477,19 @@ void tsdbCleanupQueryHandle(tsdb_query_handle_t queryHandle) {
    tfree(pTableCheckInfo->pDataCols);
    tfree(pTableCheckInfo->pCompInfo);
-    tfree(pTableCheckInfo->compIndex);
  }
  taosArrayDestroy(pQueryHandle->pTableCheckInfo);
+  tfree(pQueryHandle->compIndex);
  size_t cols = taosArrayGetSize(pQueryHandle->pColumns);
-  for(int32_t i = 0; i < cols; ++i) {
+  for (int32_t i = 0; i < cols; ++i) {
-    SColumnInfoEx *pColInfo = taosArrayGet(pQueryHandle->pColumns, i);
+    SColumnInfoEx* pColInfo = taosArrayGet(pQueryHandle->pColumns, i);
    tfree(pColInfo->pData);
  }
  taosArrayDestroy(pQueryHandle->pColumns);
-  tfree(pQueryHandle->unzipBuffer);
+  tfree(pQueryHandle->pDataBlockInfo);
-  tfree(pQueryHandle->secondaryUnzipBuffer);
  tfree(pQueryHandle);
 }