Merge pull request #2543 from taosdata/feature/query

Feature/query

src/client/inc/tscUtil.h

@@ -176,8 +176,6 @@ SColumn* tscColumnListInsert(SArray* pColList, SColumnIndex* colIndex);
 SArray* tscColumnListClone(const SArray* src, int16_t tableIndex);
 void tscColumnListDestroy(SArray* pColList);
 
-SColumnFilterInfo* tscFilterInfoClone(const SColumnFilterInfo* src, int32_t numOfFilters);
-
 int32_t tscValidateName(SSQLToken* pToken);
 
 void tscIncStreamExecutionCount(void* pStream);

src/client/inc/tsclient.h

@@ -32,8 +32,8 @@ extern "C" {
 
 #include "qExecutor.h"
 #include "qsqlparser.h"
-#include "qsqltype.h"
 #include "qtsbuf.h"
+#include "tcmdtype.h"
 
 // forward declaration
 struct SSqlInfo;
@@ -395,7 +395,6 @@ TAOS *taos_connect_a(char *ip, char *user, char *pass, char *db, uint16_t port,
                      void *param, void **taos);
 void waitForQueryRsp(void *param, TAOS_RES *tres, int code) ;
 
-int doAsyncParseSql(SSqlObj* pSql);
 void doAsyncQuery(STscObj *pObj, SSqlObj *pSql, void (*fp)(), void *param, const char *sqlstr, size_t sqlLen);
 
 void tscProcessMultiVnodesImportFromFile(SSqlObj *pSql);
@@ -403,13 +402,14 @@ void tscKillSTableQuery(SSqlObj *pSql);
 void tscInitResObjForLocalQuery(SSqlObj *pObj, int32_t numOfRes, int32_t rowLen);
 bool tscIsUpdateQuery(SSqlObj* pSql);
 bool tscHasReachLimitation(SQueryInfo *pQueryInfo, SSqlRes *pRes);
+
+// todo remove this function.
 bool tscResultsetFetchCompleted(TAOS_RES *result);
 
 char *tscGetErrorMsgPayload(SSqlCmd *pCmd);
 
 int32_t tscInvalidSQLErrMsg(char *msg, const char *additionalInfo, const char *sql);
 
-void    tscQueueAsyncFreeResult(SSqlObj *pSql);
 int32_t tscToSQLCmd(SSqlObj *pSql, struct SSqlInfo *pInfo);
 void    tscGetResultColumnChr(SSqlRes *pRes, SFieldInfo* pFieldInfo, int32_t column);
 

src/client/src/tscAsync.c

@@ -213,7 +213,8 @@ void taos_fetch_rows_a(TAOS_RES *taosa, void (*fp)(void *, TAOS_RES *, int), voi
   // handle the sub queries of join query
   if (pCmd->command == TSDB_SQL_TABLE_JOIN_RETRIEVE) {
     tscFetchDatablockFromSubquery(pSql);
-  } else if (pRes->completed && pCmd->command == TSDB_SQL_FETCH) {
+  } else if (pRes->completed) {
+    if(pCmd->command == TSDB_SQL_FETCH) {
       if (hasMoreVnodesToTry(pSql)) {  // sequentially retrieve data from remain vnodes.
         tscTryQueryNextVnode(pSql, tscAsyncQueryRowsForNextVnode);
         return;
@@ -234,6 +235,12 @@ void taos_fetch_rows_a(TAOS_RES *taosa, void (*fp)(void *, TAOS_RES *, int), voi
         (*pSql->fetchFp)(param, pSql, 0);
       }
       return;
+    } else if (pCmd->command == TSDB_SQL_RETRIEVE) {
+      // in case of show command, return no data
+      (*pSql->fetchFp)(param, pSql, 0);
+    } else {
+      assert(0);
+    }
   } else { // current query is not completed, continue retrieve from node
     if (pCmd->command != TSDB_SQL_RETRIEVE_LOCALMERGE && pCmd->command < TSDB_SQL_LOCAL) {
       pCmd->command = (pCmd->command > TSDB_SQL_MGMT) ? TSDB_SQL_RETRIEVE : TSDB_SQL_FETCH;
@@ -405,17 +412,6 @@ void tscProcessAsyncFree(SSchedMsg *pMsg) {
   taos_free_result(pSql);
 }
 
-void tscQueueAsyncFreeResult(SSqlObj *pSql) {
-  tscDebug("%p sqlObj put in queue to async free", pSql);
-
-  SSchedMsg schedMsg = { 0 };
-  schedMsg.fp = tscProcessAsyncFree;
-  schedMsg.ahandle = pSql;
-  schedMsg.thandle = (void *)1;
-  schedMsg.msg = NULL;
-  taosScheduleTask(tscQhandle, &schedMsg);
-}
-
 int tscSendMsgToServer(SSqlObj *pSql);
 
 void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {

src/client/src/tscSQLParser.c

@@ -4452,6 +4452,7 @@ int32_t setAlterTableInfo(SSqlObj* pSql, struct SSqlInfo* pInfo) {
     
     tVariantList* pVarList = pAlterSQL->varList;
     tVariant*     pTagName = &pVarList->a[0].pVar;
+    int16_t       numOfTags = tscGetNumOfTags(pTableMeta);
 
     SColumnIndex columnIndex = COLUMN_INDEX_INITIALIZER;
     SSQLToken    name = {.type = TK_STRING, .z = pTagName->pz, .n = pTagName->nLen};
@@ -4476,7 +4477,9 @@ int32_t setAlterTableInfo(SSqlObj* pSql, struct SSqlInfo* pInfo) {
       return invalidSqlErrMsg(pQueryInfo->msg, msg14);
     }
 
-    int32_t size = sizeof(SUpdateTableTagValMsg) + pTagsSchema->bytes + TSDB_EXTRA_PAYLOAD_SIZE;
+    int32_t schemaLen = sizeof(STColumn) * numOfTags;
+    int32_t size = sizeof(SUpdateTableTagValMsg) + pTagsSchema->bytes + schemaLen + TSDB_EXTRA_PAYLOAD_SIZE;
+
     if (TSDB_CODE_SUCCESS != tscAllocPayload(pCmd, size)) {
       tscError("%p failed to malloc for alter table msg", pSql);
       return TSDB_CODE_TSC_OUT_OF_MEMORY;
@@ -4487,22 +4490,36 @@ int32_t setAlterTableInfo(SSqlObj* pSql, struct SSqlInfo* pInfo) {
     pUpdateMsg->tid = htonl(pTableMeta->sid);
     pUpdateMsg->uid = htobe64(pTableMeta->uid);
     pUpdateMsg->colId = htons(pTagsSchema->colId);
-    pUpdateMsg->type  = htons(pTagsSchema->type);
-    pUpdateMsg->bytes = htons(pTagsSchema->bytes);
     pUpdateMsg->tversion = htons(pTableMeta->tversion);
+    pUpdateMsg->numOfTags = htons(numOfTags);
+    pUpdateMsg->schemaLen = htonl(schemaLen);
+
+    // the schema is located after the msg body, then followed by true tag value
+    char* d = pUpdateMsg->data;
+    SSchema* pTagCols = tscGetTableTagSchema(pTableMeta);
+    for (int i = 0; i < numOfTags; ++i) {
+      STColumn* pCol = (STColumn*) d;
+      pCol->colId = htons(pTagCols[i].colId);
+      pCol->bytes = htons(pTagCols[i].bytes);
+      pCol->type  = pTagCols[i].type;
+      pCol->offset = 0;
+
+      d += sizeof(STColumn);
+    }
 
-    tVariantDump(&pVarList->a[1].pVar, pUpdateMsg->data, pTagsSchema->type, true);
+    // copy the tag value to msg body
+    tVariantDump(&pVarList->a[1].pVar, pUpdateMsg->data + schemaLen, pTagsSchema->type, true);
     
     int32_t len = 0;
     if (pTagsSchema->type != TSDB_DATA_TYPE_BINARY && pTagsSchema->type != TSDB_DATA_TYPE_NCHAR) {
       len = tDataTypeDesc[pTagsSchema->type].nSize;
     } else {
-      len = varDataTLen(pUpdateMsg->data);
+      len = varDataTLen(pUpdateMsg->data + schemaLen);
     }
     
     pUpdateMsg->tagValLen = htonl(len);  // length may be changed after dump data
     
-    int32_t total = sizeof(SUpdateTableTagValMsg) + len;
+    int32_t total = sizeof(SUpdateTableTagValMsg) + len + schemaLen;
     pUpdateMsg->head.contLen = htonl(total);
     
   } else if (pAlterSQL->type == TSDB_ALTER_TABLE_ADD_COLUMN) {

src/client/src/tscServer.c

@@ -14,8 +14,8 @@
  */
 
 #include "os.h"
-#include "qsqltype.h"
 #include "tcache.h"
+#include "tcmdtype.h"
 #include "trpc.h"
 #include "tscLocalMerge.h"
 #include "tscLog.h"

src/client/src/tscUtil.c

@@ -1115,31 +1115,6 @@ SColumn* tscColumnListInsert(SArray* pColumnList, SColumnIndex* pColIndex) {
   return taosArrayGetP(pColumnList, i);
 }
 
-SColumnFilterInfo* tscFilterInfoClone(const SColumnFilterInfo* src, int32_t numOfFilters) {
-  if (numOfFilters == 0) {
-    assert(src == NULL);
-    return NULL;
-  }
-  
-  SColumnFilterInfo* pFilter = calloc(1, numOfFilters * sizeof(SColumnFilterInfo));
-  
-  memcpy(pFilter, src, sizeof(SColumnFilterInfo) * numOfFilters);
-  for (int32_t j = 0; j < numOfFilters; ++j) {
-    
-    if (pFilter[j].filterstr) {
-      size_t len = (size_t) pFilter[j].len + 1 * TSDB_NCHAR_SIZE;
-      pFilter[j].pz = (int64_t) calloc(1, len);
-      
-      memcpy((char*)pFilter[j].pz, (char*)src[j].pz, (size_t)len);
-    }
-  }
-  
-  assert(src->filterstr == 0 || src->filterstr == 1);
-  assert(!(src->lowerRelOptr == TSDB_RELATION_INVALID && src->upperRelOptr == TSDB_RELATION_INVALID));
-  
-  return pFilter;
-}
-
 static void destroyFilterInfo(SColumnFilterInfo* pFilterInfo, int32_t numOfFilters) {
   for(int32_t i = 0; i < numOfFilters; ++i) {
     if (pFilterInfo[i].filterstr) {

src/common/inc/qsqltype.h → src/common/inc/tcmdtype.h

@@ -13,8 +13,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef TDENGINE_QSQLCMD_H
-#define TDENGINE_QSQLCMD_H
+#ifndef TDENGINE_TSQLMSGTYPE_H
+#define TDENGINE_TSQLMSGTYPE_H
 
 #ifdef __cplusplus
 extern "C" {
@@ -109,4 +109,4 @@ extern char *sqlCmd[];
 }
 #endif
 
-#endif  // TDENGINE_QSQLCMD_H
+#endif  // TDENGINE_TSQLMSGTYPE_H

src/common/inc/tdataformat.h

@@ -50,8 +50,8 @@ extern "C" {
 typedef struct {
   int8_t  type;    // Column type
   int16_t colId;   // column ID
-  int32_t bytes;   // column bytes
-  int32_t offset;  // point offset in SDataRow after the header part
+  int16_t bytes;   // column bytes
+  int16_t offset;  // point offset in SDataRow after the header part
 } STColumn;
 
 #define colType(col) ((col)->type)
@@ -116,7 +116,7 @@ typedef struct {
 int       tdInitTSchemaBuilder(STSchemaBuilder *pBuilder, int32_t version);
 void      tdDestroyTSchemaBuilder(STSchemaBuilder *pBuilder);
 void      tdResetTSchemaBuilder(STSchemaBuilder *pBuilder, int32_t version);
-int       tdAddColToSchema(STSchemaBuilder *pBuilder, int8_t type, int16_t colId, int32_t bytes);
+int       tdAddColToSchema(STSchemaBuilder *pBuilder, int8_t type, int16_t colId, int16_t bytes);
 STSchema *tdGetSchemaFromBuilder(STSchemaBuilder *pBuilder);
 
 // ----------------- Data row structure

src/common/inc/tname.h

@@ -27,4 +27,6 @@ SSchema tGetTableNameColumnSchema();
 
 bool tscValidateTableNameLength(size_t len);
 
+SColumnFilterInfo* tscFilterInfoClone(const SColumnFilterInfo* src, int32_t numOfFilters);
+
 #endif  // TDENGINE_NAME_H

src/common/src/sqlcmdstr.c

@@ -15,4 +15,4 @@
 
 #define TSDB_SQL_C
 
-#include "qsqltype.h"
+#include "tcmdtype.h"

src/common/src/tdataformat.c

@@ -43,7 +43,7 @@ int tdEncodeSchema(void **buf, STSchema *pSchema) {
     STColumn *pCol = schemaColAt(pSchema, i);
     tlen += taosEncodeFixedI8(buf, colType(pCol));
     tlen += taosEncodeFixedI16(buf, colColId(pCol));
-    tlen += taosEncodeFixedI32(buf, colBytes(pCol));
+    tlen += taosEncodeFixedI16(buf, colBytes(pCol));
   }
 
   return tlen;
@@ -65,10 +65,10 @@ void *tdDecodeSchema(void *buf, STSchema **pRSchema) {
   for (int i = 0; i < numOfCols; i++) {
     int8_t  type = 0;
     int16_t colId = 0;
-    int32_t bytes = 0;
+    int16_t bytes = 0;
     buf = taosDecodeFixedI8(buf, &type);
     buf = taosDecodeFixedI16(buf, &colId);
-    buf = taosDecodeFixedI32(buf, &bytes);
+    buf = taosDecodeFixedI16(buf, &bytes);
     if (tdAddColToSchema(&schemaBuilder, type, colId, bytes) < 0) {
       tdDestroyTSchemaBuilder(&schemaBuilder);
       return NULL;
@@ -105,7 +105,7 @@ void tdResetTSchemaBuilder(STSchemaBuilder *pBuilder, int32_t version) {
   pBuilder->version = version;
 }
 
-int tdAddColToSchema(STSchemaBuilder *pBuilder, int8_t type, int16_t colId, int32_t bytes) {
+int tdAddColToSchema(STSchemaBuilder *pBuilder, int8_t type, int16_t colId, int16_t bytes) {
   if (!isValidDataType(type)) return -1;
 
   if (pBuilder->nCols >= pBuilder->tCols) {

src/common/src/tname.c

@@ -50,3 +50,28 @@ SSchema tGetTableNameColumnSchema() {
 bool tscValidateTableNameLength(size_t len) {
   return len < TSDB_TABLE_NAME_LEN;
 }
+
+SColumnFilterInfo* tscFilterInfoClone(const SColumnFilterInfo* src, int32_t numOfFilters) {
+  if (numOfFilters == 0) {
+    assert(src == NULL);
+    return NULL;
+  }
+
+  SColumnFilterInfo* pFilter = calloc(1, numOfFilters * sizeof(SColumnFilterInfo));
+
+  memcpy(pFilter, src, sizeof(SColumnFilterInfo) * numOfFilters);
+  for (int32_t j = 0; j < numOfFilters; ++j) {
+
+    if (pFilter[j].filterstr) {
+      size_t len = (size_t) pFilter[j].len + 1 * TSDB_NCHAR_SIZE;
+      pFilter[j].pz = (int64_t) calloc(1, len);
+
+      memcpy((char*)pFilter[j].pz, (char*)src[j].pz, (size_t)len);
+    }
+  }
+
+  assert(src->filterstr == 0 || src->filterstr == 1);
+  assert(!(src->lowerRelOptr == TSDB_RELATION_INVALID && src->upperRelOptr == TSDB_RELATION_INVALID));
+
+  return pFilter;
+}

src/inc/query.h

@@ -44,7 +44,7 @@ void qDestroyQueryInfo(qinfo_t qinfo);
  * @param qinfo
  * @return
  */
-void qTableQuery(qinfo_t qinfo, void (*fp)(void*), void* param);
+void qTableQuery(qinfo_t qinfo);
 
 /**
  * Retrieve the produced results information, if current query is not paused or completed,

src/inc/taosmsg.h

@@ -285,9 +285,9 @@ typedef struct {
   int32_t   tid;
   int16_t   tversion;
   int16_t   colId;
-  int16_t   type;
-  int16_t   bytes;
   int32_t   tagValLen;
+  int16_t   numOfTags;
+  int32_t   schemaLen;
   char      data[];
 } SUpdateTableTagValMsg;
 

src/query/inc/qExecutor.h

@@ -95,16 +95,13 @@ typedef struct SSingleColumnFilterInfo {
 } SSingleColumnFilterInfo;
 
 typedef struct STableQueryInfo {  // todo merge with the STableQueryInfo struct
-  int32_t     tableIndex;
-  int32_t     groupIndex;  // group id in table list
   TSKEY       lastKey;
-  int32_t     numOfRes;
+  int32_t     groupIndex;     // group id in table list
   int16_t     queryRangeSet;  // denote if the query range is set, only available for interval query
   int64_t     tag;
   STimeWindow win;
   STSCursor   cur;
   void*       pTable;         // for retrieve the page id list
-
   SWindowResInfo windowResInfo;
 } STableQueryInfo;
 
@@ -127,11 +124,6 @@ typedef struct SQueryCostInfo {
   uint64_t computTime;
 } SQueryCostInfo;
 
-//typedef struct SGroupItem {
-//  void            *pTable;
-//  STableQueryInfo *info;
-//} SGroupItem;
-
 typedef struct SQuery {
   int16_t          numOfCols;
   int16_t          numOfTags;
@@ -173,12 +165,12 @@ typedef struct SQueryRuntimeEnv {
   STSBuf*              pTSBuf;
   STSCursor            cur;
   SQueryCostInfo       summary;
-  bool                 stableQuery;      // super table query or not
   void*                pQueryHandle;
   void*                pSecQueryHandle;  // another thread for
-  SDiskbasedResultBuf* pResultBuf;       // query result buffer based on blocked-wised disk file
+  bool                 stableQuery;      // super table query or not
   bool                 topBotQuery;      // false
   int32_t              prevGroupId;      // previous executed group id
+  SDiskbasedResultBuf* pResultBuf;       // query result buffer based on blocked-wised disk file
 } SQueryRuntimeEnv;
 
 typedef struct SQInfo {
@@ -205,7 +197,8 @@ typedef struct SQInfo {
    */
   int32_t          tableIndex;
   int32_t          numOfGroupResultPages;
-  _qinfo_free_fn_t fn;
+  _qinfo_free_fn_t freeFn;
+  jmp_buf          env;
 } SQInfo;
 
 #endif  // TDENGINE_QUERYEXECUTOR_H

src/query/src/qExecutor.c

@@ -13,6 +13,7 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 #include "os.h"
+#include "taosmsg.h"
 #include "qfill.h"
 
 #include "hash.h"
@@ -22,9 +23,8 @@
 #include "qresultBuf.h"
 #include "query.h"
 #include "queryLog.h"
-#include "taosmsg.h"
 #include "tlosertree.h"
-#include "tscUtil.h"  // todo move the function to common module
+#include "exception.h"
 #include "tscompression.h"
 #include "ttime.h"
 
@@ -87,6 +87,17 @@ typedef struct {
   STSCursor   cur;
 } SQueryStatusInfo;
 
+static UNUSED_FUNC void *u_malloc (size_t __size) {
+//  uint32_t v = rand();
+//  if (v % 5 <= 1) {
+//    return NULL;
+//  } else {
+    return malloc(__size);
+//  }
+}
+
+#define malloc  u_malloc
+
 #define CLEAR_QUERY_STATUS(q, st)   ((q)->status &= (~(st)))
 #define GET_NUM_OF_TABLEGROUP(q)    taosArrayGetSize((q)->tableqinfoGroupInfo.pGroupList)
 #define GET_TABLEGROUP(q, _index)   ((SArray*) taosArrayGetP((q)->tableqinfoGroupInfo.pGroupList, (_index)))
@@ -2586,7 +2597,6 @@ void copyResToQueryResultBuf(SQInfo *pQInfo, SQuery *pQuery) {
 }
 
 int64_t getNumOfResultWindowRes(SQuery *pQuery, SWindowResult *pWindowRes) {
-//  int64_t maxOutput = 0;
   for (int32_t j = 0; j < pQuery->numOfOutput; ++j) {
     int32_t functionId = pQuery->pSelectExpr[j].base.functionId;
 
@@ -2604,15 +2614,6 @@ int64_t getNumOfResultWindowRes(SQuery *pQuery, SWindowResult *pWindowRes) {
     if (pResultInfo->numOfRes > 0) {
       return pResultInfo->numOfRes;
     }
-//    if (pResultInfo != NULL && maxOutput < pResultInfo->numOfRes) {
-//      maxOutput = pResultInfo->numOfRes;
-//
-//      if (maxOutput > 0) {
-//        break;
-//      }
-//    }
-//
-//    assert(pResultInfo != NULL);
   }
 
   return 0;
@@ -2623,12 +2624,19 @@ int32_t mergeIntoGroupResultImpl(SQInfo *pQInfo, SArray *pGroup) {
   SQuery *          pQuery = pRuntimeEnv->pQuery;
 
   size_t size = taosArrayGetSize(pGroup);
-
   tFilePage **buffer = pQuery->sdata;
-  int32_t *   posList = calloc(size, sizeof(int32_t));
 
+  int32_t*   posList = calloc(size, sizeof(int32_t));
   STableQueryInfo **pTableList = malloc(POINTER_BYTES * size);
 
+  if (pTableList == NULL || posList == NULL) {
+    tfree(posList);
+    tfree(pTableList);
+
+    qError("QInfo:%p failed alloc memory", pQInfo);
+    longjmp(pQInfo->env, TSDB_CODE_QRY_OUT_OF_MEMORY);
+  }
+
   // todo opt for the case of one table per group
   int32_t numOfTables = 0;
   for (int32_t i = 0; i < size; ++i) {
@@ -4069,7 +4077,7 @@ static SFillColInfo* taosCreateFillColInfo(SQuery* pQuery) {
   return pFillCol;
 }
 
-int32_t doInitQInfo(SQInfo *pQInfo, STSBuf *pTsBuf, void *tsdb, int32_t vgId, bool isSTableQuery, void* freeParam, _qinfo_free_fn_t fn) {
+int32_t doInitQInfo(SQInfo *pQInfo, STSBuf *pTsBuf, void *tsdb, int32_t vgId, bool isSTableQuery) {
   int32_t code = TSDB_CODE_SUCCESS;
   
   SQueryRuntimeEnv *pRuntimeEnv = &pQInfo->runtimeEnv;
@@ -4083,8 +4091,6 @@ int32_t doInitQInfo(SQInfo *pQInfo, STSBuf *pTsBuf, void *tsdb, int32_t vgId, bo
   
   pQInfo->tsdb = tsdb;
   pQInfo->vgId = vgId;
-  pQInfo->param = freeParam;
-  pQInfo->fn = fn;
 
   pRuntimeEnv->pQuery = pQuery;
   pRuntimeEnv->pTSBuf = pTsBuf;
@@ -4932,14 +4938,6 @@ static void tableQueryImpl(SQInfo *pQInfo) {
   // record the total elapsed time
   pRuntimeEnv->summary.elapsedTime += (taosGetTimestampUs() - st);
   assert(pQInfo->tableqinfoGroupInfo.numOfTables == 1);
-
-  /* check if query is killed or not */
-  if (isQueryKilled(pQInfo)) {
-    qDebug("QInfo:%p query is killed", pQInfo);
-  } else {
-    qDebug("QInfo:%p query paused, %" PRId64 " rows returned, numOfTotal:%" PRId64 " rows",
-        pQInfo, pQuery->rec.rows, pQuery->rec.total + pQuery->rec.rows);
-  }
 }
 
 static void stableQueryImpl(SQInfo *pQInfo) {
@@ -4961,10 +4959,6 @@ static void stableQueryImpl(SQInfo *pQInfo) {
 
   // record the total elapsed time
   pQInfo->runtimeEnv.summary.elapsedTime += (taosGetTimestampUs() - st);
-  
-  if (pQuery->rec.rows == 0) {
-    qDebug("QInfo:%p over, %zu tables queried, %"PRId64" rows are returned", pQInfo, pQInfo->tableqinfoGroupInfo.numOfTables, pQuery->rec.total);
-  }
 }
 
 static int32_t getColumnIndexInSource(SQueryTableMsg *pQueryMsg, SSqlFuncMsg *pExprMsg, SColumnInfo* pTagCols) {
@@ -5076,6 +5070,8 @@ static char *createTableIdList(SQueryTableMsg *pQueryMsg, char *pMsg, SArray **p
  */
 static int32_t convertQueryMsg(SQueryTableMsg *pQueryMsg, SArray **pTableIdList, SSqlFuncMsg ***pExpr,
                                char **tagCond, char** tbnameCond, SColIndex **groupbyCols, SColumnInfo** tagCols) {
+  int32_t code = TSDB_CODE_SUCCESS;
+
   pQueryMsg->numOfTables = htonl(pQueryMsg->numOfTables);
 
   pQueryMsg->window.skey = htobe64(pQueryMsg->window.skey);
@@ -5102,7 +5098,8 @@ static int32_t convertQueryMsg(SQueryTableMsg *pQueryMsg, SArray **pTableIdList,
 
   // query msg safety check
   if (!validateQueryMsg(pQueryMsg)) {
-    return TSDB_CODE_QRY_INVALID_MSG;
+    code = TSDB_CODE_QRY_INVALID_MSG;
+    goto _cleanup;
   }
 
   char *pMsg = (char *)(pQueryMsg->colList) + sizeof(SColumnInfo) * pQueryMsg->numOfCols;
@@ -5174,7 +5171,8 @@ static int32_t convertQueryMsg(SQueryTableMsg *pQueryMsg, SArray **pTableIdList,
     int16_t functionId = pExprMsg->functionId;
     if (functionId == TSDB_FUNC_TAG || functionId == TSDB_FUNC_TAGPRJ || functionId == TSDB_FUNC_TAG_DUMMY) {
       if (pExprMsg->colInfo.flag != TSDB_COL_TAG) {  // ignore the column  index check for arithmetic expression.
-        return TSDB_CODE_QRY_INVALID_MSG;
+        code = TSDB_CODE_QRY_INVALID_MSG;
+        goto _cleanup;
       }
     } else {
 //      if (!validateExprColumnInfo(pQueryMsg, pExprMsg)) {
@@ -5186,6 +5184,7 @@ static int32_t convertQueryMsg(SQueryTableMsg *pQueryMsg, SArray **pTableIdList,
   }
 
   if (!validateQuerySourceCols(pQueryMsg, *pExpr)) {
+    code = TSDB_CODE_QRY_INVALID_MSG;
     goto _cleanup;
   }
 
@@ -5193,6 +5192,10 @@ static int32_t convertQueryMsg(SQueryTableMsg *pQueryMsg, SArray **pTableIdList,
 
   if (pQueryMsg->numOfGroupCols > 0) {  // group by tag columns
     *groupbyCols = malloc(pQueryMsg->numOfGroupCols * sizeof(SColIndex));
+    if (*groupbyCols == NULL) {
+      code = TSDB_CODE_QRY_OUT_OF_MEMORY;
+      goto _cleanup;
+    }
 
     for (int32_t i = 0; i < pQueryMsg->numOfGroupCols; ++i) {
       (*groupbyCols)[i].colId = *(int16_t *)pMsg;
@@ -5248,7 +5251,13 @@ static int32_t convertQueryMsg(SQueryTableMsg *pQueryMsg, SArray **pTableIdList,
 
   if (*pMsg != 0) {
     size_t len = strlen(pMsg) + 1;
+
     *tbnameCond = malloc(len);
+    if (*tbnameCond == NULL) {
+      code = TSDB_CODE_QRY_OUT_OF_MEMORY;
+      goto _cleanup;
+    }
+
     strcpy(*tbnameCond, pMsg);
     pMsg += len;
   }
@@ -5258,7 +5267,8 @@ static int32_t convertQueryMsg(SQueryTableMsg *pQueryMsg, SArray **pTableIdList,
          pQueryMsg, pQueryMsg->numOfTables, pQueryMsg->queryType, pQueryMsg->window.skey, pQueryMsg->window.ekey, pQueryMsg->numOfGroupCols,
          pQueryMsg->order, pQueryMsg->numOfOutput, pQueryMsg->numOfCols, pQueryMsg->intervalTime,
          pQueryMsg->fillType, pQueryMsg->tsLen, pQueryMsg->tsNumOfBlocks, pQueryMsg->limit, pQueryMsg->offset);
-  return 0;
+
+  return TSDB_CODE_SUCCESS;
 
 _cleanup:
   tfree(*pExpr);
@@ -5268,7 +5278,8 @@ _cleanup:
   tfree(*groupbyCols);
   tfree(*tagCols);
   tfree(*tagCond);
-  return TSDB_CODE_QRY_INVALID_MSG; 
+
+  return code;
 }
 
 static int32_t buildAirthmeticExprFromMsg(SExprInfo *pArithExprInfo, SQueryTableMsg *pQueryMsg) {
@@ -5656,7 +5667,6 @@ static SQInfo *createQInfoImpl(SQueryTableMsg *pQueryMsg, SArray* pTableIdList,
 
       STableQueryInfo* item = createTableQueryInfo(&pQInfo->runtimeEnv, pTable, window);
       item->groupIndex = i;
-      item->tableIndex = tableIndex++;
       taosArrayPush(p1, &item);
       taosHashPut(pQInfo->tableqinfoGroupInfo.map, &id.tid, sizeof(id.tid), &item, POINTER_BYTES);
     }
@@ -5670,7 +5680,8 @@ static SQInfo *createQInfoImpl(SQueryTableMsg *pQueryMsg, SArray* pTableIdList,
   pQuery->window = pQueryMsg->window;
 
   if (sem_init(&pQInfo->dataReady, 0, 0) != 0) {
-    qError("QInfo:%p init dataReady sem failed, reason:%s", pQInfo, strerror(errno));
+    int32_t code = TAOS_SYSTEM_ERROR(errno);
+    qError("QInfo:%p init dataReady sem failed, reason:%s", pQInfo, tstrerror(code));
     goto _cleanup;
   }
 
@@ -5681,7 +5692,6 @@ static SQInfo *createQInfoImpl(SQueryTableMsg *pQueryMsg, SArray* pTableIdList,
 
 _cleanup:
   freeQInfo(pQInfo);
-
   return NULL;
 }
 
@@ -5723,6 +5733,9 @@ static int32_t initQInfo(SQueryTableMsg *pQueryMsg, void *tsdb, int32_t vgId, SQ
     return TSDB_CODE_SUCCESS;
   }
 
+  pQInfo->param = param;
+  pQInfo->freeFn = fn;
+
   if (pQInfo->tableqinfoGroupInfo.numOfTables == 0) {
     qDebug("QInfo:%p no table qualified for tag filter, abort query", pQInfo);
     setQueryStatus(pQuery, QUERY_COMPLETED);
@@ -5732,7 +5745,7 @@ static int32_t initQInfo(SQueryTableMsg *pQueryMsg, void *tsdb, int32_t vgId, SQ
   }
 
   // filter the qualified
-  if ((code = doInitQInfo(pQInfo, pTSBuf, tsdb, vgId, isSTable, param, fn)) != TSDB_CODE_SUCCESS) {
+  if ((code = doInitQInfo(pQInfo, pTSBuf, tsdb, vgId, isSTable)) != TSDB_CODE_SUCCESS) {
     goto _error;
   }
   
@@ -6032,19 +6045,19 @@ void qDestroyQueryInfo(qinfo_t qHandle) {
   qDebug("QInfo:%p dec refCount, value:%d", pQInfo, ref);
 
   if (ref == 0) {
-    _qinfo_free_fn_t fn = pQInfo->fn;
+    _qinfo_free_fn_t freeFp = pQInfo->freeFn;
     void* param = pQInfo->param;
 
     doDestoryQueryInfo(pQInfo);
-    if (fn != NULL) {
+    if (freeFp != NULL) {
       assert(param != NULL);
-      fn(param);
+      freeFp(param);
     }
 
   }
 }
 
-void qTableQuery(qinfo_t qinfo, void (*fp)(void*), void* param) {
+void qTableQuery(qinfo_t qinfo) {
   SQInfo *pQInfo = (SQInfo *)qinfo;
 
   if (pQInfo == NULL || pQInfo->signature != pQInfo) {
@@ -6054,17 +6067,34 @@ void qTableQuery(qinfo_t qinfo, void (*fp)(void*), void* param) {
 
   if (isQueryKilled(pQInfo)) {
     qDebug("QInfo:%p it is already killed, abort", pQInfo);
+
+    sem_post(&pQInfo->dataReady);
     qDestroyQueryInfo(pQInfo);
     return;
   }
 
   if (pQInfo->tableqinfoGroupInfo.numOfTables == 0) {
     qDebug("QInfo:%p no table exists for query, abort", pQInfo);
+
+    sem_post(&pQInfo->dataReady);
+    qDestroyQueryInfo(pQInfo);
+    return;
+  }
+
+  int32_t ret = setjmp(pQInfo->env);
+  // error occurs, record the error code and return to client
+  if (ret != TSDB_CODE_SUCCESS) {
+    pQInfo->code = ret;
+    qDebug("QInfo:%p query abort due to error occurs, code:%s", pQInfo, tstrerror(pQInfo->code));
+    sem_post(&pQInfo->dataReady);
+    qDestroyQueryInfo(pQInfo);
+
     return;
   }
 
   qDebug("QInfo:%p query task is launched", pQInfo);
 
+  SQueryRuntimeEnv* pRuntimeEnv = &pQInfo->runtimeEnv;
   if (onlyQueryTags(pQInfo->runtimeEnv.pQuery)) {
     assert(pQInfo->runtimeEnv.pQueryHandle == NULL);
     buildTagQueryResult(pQInfo);   // todo support the limit/offset
@@ -6074,6 +6104,16 @@ void qTableQuery(qinfo_t qinfo, void (*fp)(void*), void* param) {
     tableQueryImpl(pQInfo);
   }
 
+  SQuery* pQuery = pRuntimeEnv->pQuery;
+  if (isQueryKilled(pQInfo)) {
+    qDebug("QInfo:%p query is killed", pQInfo);
+  } else if (pQuery->rec.rows == 0) {
+    qDebug("QInfo:%p over, %zu tables queried, %"PRId64" rows are returned", pQInfo, pQInfo->tableqinfoGroupInfo.numOfTables, pQuery->rec.total);
+  } else {
+    qDebug("QInfo:%p query paused, %" PRId64 " rows returned, numOfTotal:%" PRId64 " rows",
+           pQInfo, pQuery->rec.rows, pQuery->rec.total + pQuery->rec.rows);
+  }
+
   sem_post(&pQInfo->dataReady);
   qDestroyQueryInfo(pQInfo);
 }

src/query/src/qast.c

@@ -1173,9 +1173,7 @@ tExprNode* exprTreeFromTableName(const char* tbnameCond) {
       size_t len = strlen(cond) + VARSTR_HEADER_SIZE;
       
       char* p = exception_malloc(len);
-      varDataSetLen(p, len - VARSTR_HEADER_SIZE);
-      memcpy(varDataVal(p), cond, len);
-      
+      STR_WITH_SIZE_TO_VARSTR(p, cond, len - VARSTR_HEADER_SIZE);
       taosArrayPush(pVal->arr, &p);
     }
 

src/query/src/qparserImpl.c

@@ -15,16 +15,16 @@
 
 #include "os.h"
 #include "qsqlparser.h"
+#include "queryLog.h"
 #include "taosdef.h"
 #include "taosmsg.h"
+#include "tcmdtype.h"
 #include "tglobal.h"
 #include "tstoken.h"
+#include "tstrbuild.h"
 #include "ttime.h"
 #include "ttokendef.h"
 #include "tutil.h"
-#include "qsqltype.h"
-#include "tstrbuild.h"
-#include "queryLog.h"
 
 SSqlInfo qSQLParse(const char *pStr) {
   void *pParser = ParseAlloc(malloc);

src/query/src/sql.c

@@ -25,17 +25,17 @@
 #include <stdio.h>
 /************ Begin %include sections from the grammar ************************/
 
+#include <assert.h>
+#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <assert.h>
-#include <stdbool.h>
-#include "tutil.h"
 #include "qsqlparser.h"
+#include "tcmdtype.h"
 #include "tstoken.h"
-#include "tvariant.h"
 #include "ttokendef.h"
-#include "qsqltype.h"
+#include "tutil.h"
+#include "tvariant.h"
 /**************** End of %include directives **********************************/
 /* These constants specify the various numeric values for terminal symbols
 ** in a format understandable to "makeheaders".  This section is blank unless

src/tsdb/src/tsdbMeta.c

@@ -255,17 +255,46 @@ _err:
   return NULL;
 }
 
+static int32_t colIdCompar(const void* left, const void* right) {
+  int16_t colId = *(int16_t*) left;
+  STColumn* p2 = (STColumn*) right;
+
+  if (colId == p2->colId) {
+    return 0;
+  }
+
+  return (colId < p2->colId)? -1:1;
+}
+
 int tsdbUpdateTagValue(TSDB_REPO_T *repo, SUpdateTableTagValMsg *pMsg) {
   STsdbRepo *pRepo = (STsdbRepo *)repo;
   STsdbMeta *pMeta = pRepo->tsdbMeta;
-  int16_t    tversion = htons(pMsg->tversion);
 
-  STable *pTable = tsdbGetTableByUid(pMeta, htobe64(pMsg->uid));
+  pMsg->uid = htobe64(pMsg->uid);
+  pMsg->tid = htonl(pMsg->tid);
+  pMsg->tversion  = htons(pMsg->tversion);
+  pMsg->colId     = htons(pMsg->colId);
+  pMsg->tagValLen = htonl(pMsg->tagValLen);
+  pMsg->numOfTags = htons(pMsg->numOfTags);
+  pMsg->schemaLen = htonl(pMsg->schemaLen);
+  assert(pMsg->schemaLen == sizeof(STColumn) * pMsg->numOfTags);
+
+  char* d = pMsg->data;
+  for(int32_t i = 0; i < pMsg->numOfTags; ++i) {
+    STColumn* pCol = (STColumn*) d;
+    pCol->colId = htons(pCol->colId);
+    pCol->bytes = htons(pCol->bytes);
+    pCol->offset = 0;
+
+    d += sizeof(STColumn);
+  }
+
+  STable *pTable = tsdbGetTableByUid(pMeta, pMsg->uid);
   if (pTable == NULL) {
     terrno = TSDB_CODE_TDB_INVALID_TABLE_ID;
     return -1;
   }
-  if (TABLE_TID(pTable) != htonl(pMsg->tid)) {
+  if (TABLE_TID(pTable) != pMsg->tid) {
     terrno = TSDB_CODE_TDB_INVALID_TABLE_ID;
     return -1;
   }
@@ -277,10 +306,10 @@ int tsdbUpdateTagValue(TSDB_REPO_T *repo, SUpdateTableTagValMsg *pMsg) {
     return -1;
   }
 
-  if (schemaVersion(tsdbGetTableTagSchema(pTable)) < tversion) {
+  if (schemaVersion(tsdbGetTableTagSchema(pTable)) < pMsg->tversion) {
     tsdbDebug("vgId:%d server tag version %d is older than client tag version %d, try to config", REPO_ID(pRepo),
-              schemaVersion(tsdbGetTableTagSchema(pTable)), tversion);
-    void *msg = (*pRepo->appH.configFunc)(pRepo->config.tsdbId, htonl(pMsg->tid));
+              schemaVersion(tsdbGetTableTagSchema(pTable)), pMsg->tversion);
+    void *msg = (*pRepo->appH.configFunc)(pRepo->config.tsdbId, pMsg->tid);
     if (msg == NULL) return -1;
 
     // Deal with error her
@@ -299,19 +328,24 @@ int tsdbUpdateTagValue(TSDB_REPO_T *repo, SUpdateTableTagValMsg *pMsg) {
 
   STSchema *pTagSchema = tsdbGetTableTagSchema(pTable);
 
-  if (schemaVersion(pTagSchema) > tversion) {
+  if (schemaVersion(pTagSchema) > pMsg->tversion) {
     tsdbError(
         "vgId:%d failed to update tag value of table %s since version out of date, client tag version %d server tag "
         "version %d",
-        REPO_ID(pRepo), TABLE_CHAR_NAME(pTable), tversion, schemaVersion(pTable->tagSchema));
+        REPO_ID(pRepo), TABLE_CHAR_NAME(pTable), pMsg->tversion, schemaVersion(pTable->tagSchema));
     return TSDB_CODE_TDB_TAG_VER_OUT_OF_DATE;
   }
-  if (schemaColAt(pTagSchema, DEFAULT_TAG_INDEX_COLUMN)->colId == htons(pMsg->colId)) {
+  if (schemaColAt(pTagSchema, DEFAULT_TAG_INDEX_COLUMN)->colId == pMsg->colId) {
     tsdbRemoveTableFromIndex(pMeta, pTable);
   }
   // TODO: remove table from index if it is the first column of tag
-  tdSetKVRowDataOfCol(&pTable->tagVal, htons(pMsg->colId), htons(pMsg->type), pMsg->data);
-  if (schemaColAt(pTagSchema, DEFAULT_TAG_INDEX_COLUMN)->colId == htons(pMsg->colId)) {
+
+  // TODO: convert the tag schema from client, and then extract the type and bytes from schema according to colId
+  STColumn* res = bsearch(&pMsg->colId, pMsg->data, pMsg->numOfTags, sizeof(STColumn), colIdCompar);
+  assert(res != NULL);
+
+  tdSetKVRowDataOfCol(&pTable->tagVal, pMsg->colId, res->type, pMsg->data + pMsg->schemaLen);
+  if (schemaColAt(pTagSchema, DEFAULT_TAG_INDEX_COLUMN)->colId == pMsg->colId) {
     tsdbAddTableIntoIndex(pMeta, pTable);
   }
   return TSDB_CODE_SUCCESS;

src/tsdb/src/tsdbRead.c

@@ -74,9 +74,6 @@ typedef struct STableCheckInfo {
   SDataCols*    pDataCols;
   int32_t       chosen;         // indicate which iterator should move forward
   bool          initBuf;        // whether to initialize the in-memory skip list iterator or not
-  SMemTable*    mem;            // in-mem buffer, hold the ref count
-  SMemTable*    imem;           // imem buffer, hold the ref count to avoid release
-
   SSkipListIterator* iter;      // mem buffer skip list iterator
   SSkipListIterator* iiter;     // imem buffer skip list iterator
 } STableCheckInfo;
@@ -113,6 +110,8 @@ typedef struct STsdbQueryHandle {
   SFileGroupIter fileIter;
   SRWHelper      rhelper;
   STableBlockInfo* pDataBlockInfo;
+  SMemTable*     mem;              // mem-table
+  SMemTable*     imem;             // imem-table, acquired from snapshot
   
   SDataBlockLoadInfo dataBlockLoadInfo; /* record current block load information */
   SLoadCompBlockInfo compBlockLoadInfo; /* record current compblock information in SQuery */
@@ -138,9 +137,6 @@ static void tsdbInitCompBlockLoadInfo(SLoadCompBlockInfo* pCompBlockLoadInfo) {
 }
 
 TsdbQueryHandleT* tsdbQueryTables(TSDB_REPO_T* tsdb, STsdbQueryCond* pCond, STableGroupInfo* groupList, void* qinfo) {
-  // 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));
   pQueryHandle->order       = pCond->order;
   pQueryHandle->window      = pCond->twindow;
@@ -154,6 +150,7 @@ TsdbQueryHandleT* tsdbQueryTables(TSDB_REPO_T* tsdb, STsdbQueryCond* pCond, STab
   pQueryHandle->outputCapacity = ((STsdbRepo*)tsdb)->config.maxRowsPerFileBlock;
   
   tsdbInitReadHelper(&pQueryHandle->rhelper, (STsdbRepo*) tsdb);
+  tsdbTakeMemSnapshot(pQueryHandle->pTsdb, &pQueryHandle->mem, &pQueryHandle->imem);
 
   size_t sizeOfGroup = taosArrayGetSize(groupList->pGroupList);
   assert(sizeOfGroup >= 1 && pCond != NULL && pCond->numOfCols > 0);
@@ -252,22 +249,22 @@ static bool initTableMemIterator(STsdbQueryHandle* pHandle, STableCheckInfo* pCh
   pCheckInfo->initBuf = true;
   int32_t order = pHandle->order;
 
-  tsdbTakeMemSnapshot(pHandle->pTsdb, &pCheckInfo->mem, &pCheckInfo->imem);
+//  tsdbTakeMemSnapshot(pHandle->pTsdb, &pCheckInfo->mem, &pCheckInfo->imem);
 
   // no data in buffer, abort
-  if (pCheckInfo->mem == NULL && pCheckInfo->imem == NULL) {
+  if (pHandle->mem == NULL && pHandle->imem == NULL) {
     return false;
   }
   
   assert(pCheckInfo->iter == NULL && pCheckInfo->iiter == NULL);
   
-  if (pCheckInfo->mem && pCheckInfo->mem->tData[pCheckInfo->tableId.tid] != NULL) {
-    pCheckInfo->iter = tSkipListCreateIterFromVal(pCheckInfo->mem->tData[pCheckInfo->tableId.tid]->pData,
+  if (pHandle->mem && pHandle->mem->tData[pCheckInfo->tableId.tid] != NULL) {
+    pCheckInfo->iter = tSkipListCreateIterFromVal(pHandle->mem->tData[pCheckInfo->tableId.tid]->pData,
         (const char*) &pCheckInfo->lastKey, TSDB_DATA_TYPE_TIMESTAMP, order);
   }
   
-  if (pCheckInfo->imem && pCheckInfo->imem->tData[pCheckInfo->tableId.tid] != NULL) {
-    pCheckInfo->iiter = tSkipListCreateIterFromVal(pCheckInfo->imem->tData[pCheckInfo->tableId.tid]->pData,
+  if (pHandle->imem && pHandle->imem->tData[pCheckInfo->tableId.tid] != NULL) {
+    pCheckInfo->iiter = tSkipListCreateIterFromVal(pHandle->imem->tData[pCheckInfo->tableId.tid]->pData,
         (const char*) &pCheckInfo->lastKey, TSDB_DATA_TYPE_TIMESTAMP, order);
   }
   
@@ -2319,9 +2316,6 @@ void tsdbCleanupQueryHandle(TsdbQueryHandleT queryHandle) {
     STableCheckInfo* pTableCheckInfo = taosArrayGet(pQueryHandle->pTableCheckInfo, i);
     tSkipListDestroyIter(pTableCheckInfo->iter);
 
-    tsdbUnRefMemTable(pQueryHandle->pTsdb, pTableCheckInfo->mem);
-    tsdbUnRefMemTable(pQueryHandle->pTsdb, pTableCheckInfo->imem);
-
     if (pTableCheckInfo->pDataCols != NULL) {
       tfree(pTableCheckInfo->pDataCols->buf);
     }
@@ -2342,8 +2336,11 @@ void tsdbCleanupQueryHandle(TsdbQueryHandleT queryHandle) {
   tfree(pQueryHandle->pDataBlockInfo);
   tfree(pQueryHandle->statis);
 
-  tsdbDestroyHelper(&pQueryHandle->rhelper);
+  // todo check error
+  tsdbUnRefMemTable(pQueryHandle->pTsdb, pQueryHandle->mem);
+  tsdbUnRefMemTable(pQueryHandle->pTsdb, pQueryHandle->imem);
 
+  tsdbDestroyHelper(&pQueryHandle->rhelper);
   tfree(pQueryHandle);
 }
 

src/util/src/tcache.c

@@ -547,7 +547,6 @@ void taosRemoveFromTrashCan(SCacheObj *pCacheObj, STrashElem *pElem) {
     pCacheObj->freeFp(pElem->pData->data);
   }
 
-  uError("-------------------free obj:%p", pElem->pData);
   free(pElem->pData);
   free(pElem);
 }

src/vnode/src/vnodeMain.c

@@ -324,7 +324,7 @@ void vnodeRelease(void *pVnodeRaw) {
   assert(refCount >= 0);
 
   if (refCount > 0) {
-    vTrace("vgId:%d, release vnode, refCount:%d", vgId, refCount);
+    vDebug("vgId:%d, release vnode, refCount:%d", vgId, refCount);
     return;
   }
 
@@ -388,7 +388,7 @@ void *vnodeAccquireVnode(int32_t vgId) {
   if (pVnode == NULL) return pVnode;
 
   atomic_add_fetch_32(&pVnode->refCount, 1);
-  vTrace("vgId:%d, get vnode, refCount:%d", pVnode->vgId, pVnode->refCount);
+  vDebug("vgId:%d, get vnode, refCount:%d", pVnode->vgId, pVnode->refCount);
 
   return pVnode;
 }
@@ -466,6 +466,7 @@ static void vnodeCleanUp(SVnodeObj *pVnode) {
   vTrace("vgId:%d, vnode will cleanup, refCount:%d", pVnode->vgId, pVnode->refCount);
 
   // release local resources only after cutting off outside connections
+  taosCacheCleanup(pVnode->qHandlePool);
   vnodeRelease(pVnode);
 }
 

src/vnode/src/vnodeRead.c

@@ -78,15 +78,14 @@ static int32_t vnodeProcessQueryMsg(SVnodeObj *pVnode, SReadMsg *pReadMsg) {
 
     // this message arrived here by means of the *query* message, so release the vnode is necessary
     void** qhandle = taosCacheAcquireByKey(pVnode->qHandlePool, (void*) &killQueryMsg->qhandle, sizeof(killQueryMsg->qhandle));
-    if (qhandle == NULL || *qhandle == NULL) {  // todo handle invalid qhandle error
-
+    if (qhandle == NULL || *qhandle == NULL) {
+      vWarn("QInfo:%p invalid qhandle, no matched query handle, conn:%p", (void*) killQueryMsg->qhandle, pReadMsg->rpcMsg.handle);
     } else {
-//      qKillQuery((qinfo_t) killQueryMsg->qhandle);
       taosCacheRelease(pVnode->qHandlePool, (void**) &qhandle, true);
     }
 
     vnodeRelease(pVnode);
-    return TSDB_CODE_TSC_QUERY_CANCELLED; // todo change the error code
+    return TSDB_CODE_TSC_QUERY_CANCELLED;
   }
 
   int32_t code = TSDB_CODE_SUCCESS;
@@ -97,8 +96,8 @@ static int32_t vnodeProcessQueryMsg(SVnodeObj *pVnode, SReadMsg *pReadMsg) {
     code = qCreateQueryInfo(pVnode->tsdb, pVnode->vgId, pQueryTableMsg, pVnode, vnodeRelease, &pQInfo);
 
     SQueryTableRsp *pRsp = (SQueryTableRsp *) rpcMallocCont(sizeof(SQueryTableRsp));
-    pRsp->qhandle = htobe64((uint64_t) (pQInfo));
     pRsp->code    = code;
+    pRsp->qhandle = 0;
 
     pRet->len = sizeof(SQueryTableRsp);
     pRet->rsp = pRsp;
@@ -120,6 +119,7 @@ static int32_t vnodeProcessQueryMsg(SVnodeObj *pVnode, SReadMsg *pReadMsg) {
 
       handle = taosCachePut(pVnode->qHandlePool, pQInfo, sizeof(pQInfo), &pQInfo, sizeof(pQInfo), tsShellActivityTimer * 2);
       assert(*handle == pQInfo);
+      pRsp->qhandle = htobe64((uint64_t) (handle));
     } else {
       assert(pQInfo == NULL);
       vnodeRelease(pVnode);
@@ -128,13 +128,17 @@ static int32_t vnodeProcessQueryMsg(SVnodeObj *pVnode, SReadMsg *pReadMsg) {
     vDebug("vgId:%d, QInfo:%p, dnode query msg disposed", pVnode->vgId, pQInfo);
   } else {
     assert(pCont != NULL);
-    pQInfo = pCont;
+    pQInfo = *(void**)(pCont);
+    handle = pCont;
     code = TSDB_CODE_VND_ACTION_IN_PROGRESS;
+
     vDebug("vgId:%d, QInfo:%p, dnode query msg in progress", pVnode->vgId, pQInfo);
   }
 
   if (pQInfo != NULL) {
-    qTableQuery(pQInfo, vnodeRelease, pVnode); // do execute query
+    qTableQuery(pQInfo); // do execute query
+
+    assert(handle != NULL);
     taosCacheRelease(pVnode->qHandlePool, (void**) &handle, false);
   }
 
@@ -146,23 +150,24 @@ static int32_t vnodeProcessFetchMsg(SVnodeObj *pVnode, SReadMsg *pReadMsg) {
   SRspRet *pRet = &pReadMsg->rspRet;
 
   SRetrieveTableMsg *pRetrieve = pCont;
-  void *pQInfo = (void*) htobe64(pRetrieve->qhandle);
+  void **pQInfo = (void*) htobe64(pRetrieve->qhandle);
   pRetrieve->free = htons(pRetrieve->free);
 
+  vDebug("vgId:%d, QInfo:%p, retrieve msg is disposed", pVnode->vgId, *pQInfo);
+
   memset(pRet, 0, sizeof(SRspRet));
   int32_t ret = 0;
 
-  void** handle = taosCacheAcquireByKey(pVnode->qHandlePool, &pQInfo, sizeof(pQInfo));
-  if (handle == NULL || *handle != pQInfo) {
+  void** handle = taosCacheAcquireByKey(pVnode->qHandlePool, pQInfo, sizeof(pQInfo));
+  if (handle == NULL || handle != pQInfo) {
     ret = TSDB_CODE_QRY_INVALID_QHANDLE;
   }
 
   if (pRetrieve->free == 1) {
+    if (ret == TSDB_CODE_SUCCESS) {
       vDebug("vgId:%d, QInfo:%p, retrieve msg received to kill query and free qhandle", pVnode->vgId, pQInfo);
 
-    taosCacheRelease(pVnode->qHandlePool, handle, true);
-//    int32_t ret = qKillQuery(pQInfo);
-
+      taosCacheRelease(pVnode->qHandlePool, (void**) &handle, true);
       pRet->rsp = (SRetrieveTableRsp *)rpcMallocCont(sizeof(SRetrieveTableRsp));
       pRet->len = sizeof(SRetrieveTableRsp);
 
@@ -171,27 +176,28 @@ static int32_t vnodeProcessFetchMsg(SVnodeObj *pVnode, SReadMsg *pReadMsg) {
       pRsp->numOfRows = 0;
       pRsp->completed = true;
       pRsp->useconds  = 0;
+    } else { // todo handle error
 
+    }
     return ret;
   }
 
-  vDebug("vgId:%d, QInfo:%p, retrieve msg is received", pVnode->vgId, pQInfo);
+  vDebug("vgId:%d, QInfo:%p, retrieve msg is received", pVnode->vgId, *pQInfo);
 
-  int32_t code = qRetrieveQueryResultInfo(pQInfo);
+  int32_t code = qRetrieveQueryResultInfo(*pQInfo);
   if (code != TSDB_CODE_SUCCESS) {
     //TODO
     pRet->rsp = (SRetrieveTableRsp *)rpcMallocCont(sizeof(SRetrieveTableRsp));
     memset(pRet->rsp, 0, sizeof(SRetrieveTableRsp));
   } else {
     // todo check code and handle error in build result set
-    code = qDumpRetrieveResult(pQInfo, (SRetrieveTableRsp **)&pRet->rsp, &pRet->len);
+    code = qDumpRetrieveResult(*pQInfo, (SRetrieveTableRsp **)&pRet->rsp, &pRet->len);
 
-    if (qHasMoreResultsToRetrieve(pQInfo)) {
-      pRet->qhandle = pQInfo;
+    if (qHasMoreResultsToRetrieve(*pQInfo)) {
+      pRet->qhandle = handle;
       code = TSDB_CODE_VND_ACTION_NEED_REPROCESSED;
     } else { // no further execution invoked, release the ref to vnode
       taosCacheRelease(pVnode->qHandlePool, (void**) &handle, true);
-//      qDestroyQueryInfo(pQInfo);
     }
   }