[TD-2378]<enhance>: optimize the client memory requirement.

src/client/inc/tsclient.h

@@ -69,9 +69,10 @@ typedef struct STableMeta {
   int16_t        sversion;
   int16_t        tversion;
   char           sTableId[TSDB_TABLE_FNAME_LEN];
-  SVgroupInfo    vgroupInfo;
+  int32_t        vgId;
   SCorVgroupInfo corVgroupInfo;
   STableId       id;
+//  union {int64_t stableUid; SSchema* schema;};
   SSchema        schema[];  // if the table is TSDB_CHILD_TABLE, schema is acquired by super table meta info
 } STableMeta;
 

src/client/src/tscFunctionImpl.c

@@ -2625,7 +2625,6 @@ static bool apercentile_function_setup(SQLFunctionCtx *pCtx) {
   
   char *tmp = (char *)pInfo + sizeof(SAPercentileInfo);
   pInfo->pHisto = tHistogramCreateFrom(tmp, MAX_HISTOGRAM_BIN);
-  printf("%p, %p\n", pInfo->pHisto, pInfo->pHisto->elems);
   return true;
 }
 

src/client/src/tscParseInsert.c

@@ -731,7 +731,7 @@ static int32_t doParseInsertStatement(SSqlCmd* pCmd, char **str, SParsedDataColI
     return code;
   }
 
-  dataBuf->vgId = pTableMeta->vgroupInfo.vgId;
+  dataBuf->vgId = pTableMeta->vgId;
   dataBuf->numOfTables = 1;
 
   *totalNum += numOfRows;

src/client/src/tscSQLParser.c

@@ -4936,7 +4936,7 @@ int32_t setAlterTableInfo(SSqlObj* pSql, struct SSqlInfo* pInfo) {
     }
 
     SUpdateTableTagValMsg* pUpdateMsg = (SUpdateTableTagValMsg*) pCmd->payload;
-    pUpdateMsg->head.vgId = htonl(pTableMeta->vgroupInfo.vgId);
+    pUpdateMsg->head.vgId = htonl(pTableMeta->vgId);
     pUpdateMsg->tid       = htonl(pTableMeta->id.tid);
     pUpdateMsg->uid       = htobe64(pTableMeta->id.uid);
     pUpdateMsg->colId     = htons(pTagsSchema->colId);

src/client/src/tscSchemaUtil.c

@@ -130,13 +130,14 @@ SSchema* tscGetColumnSchemaById(STableMeta* pTableMeta, int16_t colId) {
   return NULL;
 }
 
-static void tscInitCorVgroupInfo(SCorVgroupInfo *corVgroupInfo, SVgroupInfo *vgroupInfo) {
+static void tscInitCorVgroupInfo(SCorVgroupInfo *corVgroupInfo, SVgroupMsg *pVgroupMsg) {
   corVgroupInfo->version = 0;
   corVgroupInfo->inUse   = 0;
-  corVgroupInfo->numOfEps = vgroupInfo->numOfEps;
-  for (int32_t i = 0; i < corVgroupInfo->numOfEps; i++) {
-    corVgroupInfo->epAddr[i].fqdn = strdup(vgroupInfo->epAddr[i].fqdn);
-    corVgroupInfo->epAddr[i].port = vgroupInfo->epAddr[i].port;
+  corVgroupInfo->numOfEps = pVgroupMsg->numOfEps;
+
+  for (int32_t i = 0; i < pVgroupMsg->numOfEps; i++) {
+    corVgroupInfo->epAddr[i].fqdn = strndup(pVgroupMsg->epAddr[i].fqdn, tListLen(pVgroupMsg->epAddr[0].fqdn));
+    corVgroupInfo->epAddr[i].port = pVgroupMsg->epAddr[i].port;
   }
 }
 
@@ -145,7 +146,9 @@ STableMeta* tscCreateTableMetaFromMsg(STableMetaMsg* pTableMetaMsg, size_t* size
   
   int32_t schemaSize = (pTableMetaMsg->numOfColumns + pTableMetaMsg->numOfTags) * sizeof(SSchema);
   STableMeta* pTableMeta = calloc(1, sizeof(STableMeta) + schemaSize);
+
   pTableMeta->tableType = pTableMetaMsg->tableType;
+  pTableMeta->vgId      = pTableMetaMsg->vgroup.vgId;
 
   pTableMeta->tableInfo = (STableComInfo) {
     .numOfTags    = pTableMetaMsg->numOfTags,
@@ -156,18 +159,7 @@ STableMeta* tscCreateTableMetaFromMsg(STableMetaMsg* pTableMetaMsg, size_t* size
   pTableMeta->id.tid = pTableMetaMsg->tid;
   pTableMeta->id.uid = pTableMetaMsg->uid;
 
-  SVgroupInfo* pVgroupInfo = &pTableMeta->vgroupInfo;
-  pVgroupInfo->numOfEps = pTableMetaMsg->vgroup.numOfEps;
-  pVgroupInfo->vgId = pTableMetaMsg->vgroup.vgId;
-
-  for(int32_t i = 0; i < pVgroupInfo->numOfEps; ++i) {
-    SEpAddrMsg* pEpMsg = &pTableMetaMsg->vgroup.epAddr[i];
-
-    pVgroupInfo->epAddr[i].fqdn = strndup(pEpMsg->fqdn, tListLen(pEpMsg->fqdn));
-    pVgroupInfo->epAddr[i].port = pEpMsg->port;
-  }
-
-  tscInitCorVgroupInfo(&pTableMeta->corVgroupInfo, pVgroupInfo);
+  tscInitCorVgroupInfo(&pTableMeta->corVgroupInfo, &pTableMetaMsg->vgroup);
 
   pTableMeta->sversion = pTableMetaMsg->sversion;
   pTableMeta->tversion = pTableMetaMsg->tversion;

src/client/src/tscServer.c

@@ -45,32 +45,30 @@ static int32_t getWaitingTimeInterval(int32_t count) {
     return 0;
   }
 
-  return initial * (2<<(count - 2));
+  return initial * ((2u)<<(count - 2));
 }
 
-static void tscSetDnodeEpSet(SSqlObj* pSql, SVgroupInfo* pVgroupInfo) {
-  assert(pSql != NULL && pVgroupInfo != NULL && pVgroupInfo->numOfEps > 0);
-
-  SRpcEpSet* pEpSet = &pSql->epSet;
+static void tscSetDnodeEpSet(SRpcEpSet* pEpSet, SVgroupInfo* pVgroupInfo) {
+  assert(pEpSet != NULL && pVgroupInfo != NULL && pVgroupInfo->numOfEps > 0);
 
   // Issue the query to one of the vnode among a vgroup randomly.
   // change the inUse property would not affect the isUse attribute of STableMeta
   pEpSet->inUse = rand() % pVgroupInfo->numOfEps;
 
   // apply the FQDN string length check here
-  bool hasFqdn = false;
+  bool existed = false;
 
   pEpSet->numOfEps = pVgroupInfo->numOfEps;
   for(int32_t i = 0; i < pVgroupInfo->numOfEps; ++i) {
-    tstrncpy(pEpSet->fqdn[i], pVgroupInfo->epAddr[i].fqdn, tListLen(pEpSet->fqdn[i]));
     pEpSet->port[i] = pVgroupInfo->epAddr[i].port;
 
-    if (!hasFqdn) {
-      hasFqdn = (strlen(pEpSet->fqdn[i]) > 0);
+    int32_t len = (int32_t) strnlen(pVgroupInfo->epAddr[i].fqdn, TSDB_FQDN_LEN);
+    if (len > 0) {
+      tstrncpy(pEpSet->fqdn[i], pVgroupInfo->epAddr[i].fqdn, tListLen(pEpSet->fqdn[i]));
+      existed = true;
     }
   }
-
-  assert(hasFqdn);
+  assert(existed);
 }
 
 static void tscDumpMgmtEpSet(SSqlObj *pSql) {
@@ -102,7 +100,8 @@ void tscUpdateMgmtEpSet(SSqlObj *pSql, SRpcEpSet *pEpSet) {
   pCorEpSet->epSet = *pEpSet;
   taosCorEndWrite(&pCorEpSet->version);
 }
-static void tscDumpEpSetFromVgroupInfo(SCorVgroupInfo *pVgroupInfo, SRpcEpSet *pEpSet) {
+
+static void tscDumpEpSetFromVgroupInfo(SRpcEpSet *pEpSet, SCorVgroupInfo *pVgroupInfo) {
   if (pVgroupInfo == NULL) { return;}
   taosCorBeginRead(&pVgroupInfo->version);
   int8_t inUse = pVgroupInfo->inUse;
@@ -515,8 +514,8 @@ int tscBuildFetchMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
     }
   } else {
     STableMeta* pTableMeta = pTableMetaInfo->pTableMeta;
-    pRetrieveMsg->header.vgId = htonl(pTableMeta->vgroupInfo.vgId);
-    tscDebug("%p build fetch msg from only one vgroup, vgId:%d", pSql, pTableMeta->vgroupInfo.vgId);
+    pRetrieveMsg->header.vgId = htonl(pTableMeta->vgId);
+    tscDebug("%p build fetch msg from only one vgroup, vgId:%d", pSql, pTableMeta->vgId);
   }
 
   pSql->cmd.payloadLen = sizeof(SRetrieveTableMsg);
@@ -535,7 +534,6 @@ int tscBuildSubmitMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
   
   // NOTE: shell message size should not include SMsgDesc
   int32_t size = pSql->cmd.payloadLen - sizeof(SMsgDesc);
-  int32_t vgId = pTableMeta->vgroupInfo.vgId;
 
   SMsgDesc* pMsgDesc = (SMsgDesc*) pMsg;
   pMsgDesc->numOfVnodes = htonl(1); // always one vnode
@@ -543,7 +541,7 @@ int tscBuildSubmitMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
   pMsg += sizeof(SMsgDesc);
   SSubmitMsg *pShellMsg = (SSubmitMsg *)pMsg;
 
-  pShellMsg->header.vgId = htonl(vgId);
+  pShellMsg->header.vgId = htonl(pTableMeta->vgId);
   pShellMsg->header.contLen = htonl(size);      // the length not includes the size of SMsgDesc
   pShellMsg->length = pShellMsg->header.contLen;
   
@@ -551,9 +549,9 @@ int tscBuildSubmitMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
 
   // pSql->cmd.payloadLen is set during copying data into payload
   pSql->cmd.msgType = TSDB_MSG_TYPE_SUBMIT;
-  tscDumpEpSetFromVgroupInfo(&pTableMeta->corVgroupInfo, &pSql->epSet);
+  tscDumpEpSetFromVgroupInfo(&pSql->epSet, &pTableMeta->corVgroupInfo);
 
-  tscDebug("%p build submit msg, vgId:%d numOfTables:%d numberOfEP:%d", pSql, vgId, pSql->cmd.numOfTablesInSubmit,
+  tscDebug("%p build submit msg, vgId:%d numOfTables:%d numberOfEP:%d", pSql, pTableMeta->vgId, pSql->cmd.numOfTablesInSubmit,
       pSql->epSet.numOfEps);
   return TSDB_CODE_SUCCESS;
 }
@@ -597,24 +595,28 @@ static char *doSerializeTableInfo(SQueryTableMsg* pQueryMsg, SSqlObj *pSql, char
   STableMeta * pTableMeta = pTableMetaInfo->pTableMeta;
   if (UTIL_TABLE_IS_NORMAL_TABLE(pTableMetaInfo) || pTableMetaInfo->pVgroupTables == NULL) {
     
-    SVgroupInfo* pVgroupInfo = NULL;
+    int32_t vgId = -1;
     if (UTIL_TABLE_IS_SUPER_TABLE(pTableMetaInfo)) {
       int32_t index = pTableMetaInfo->vgroupIndex;
       assert(index >= 0);
 
+      SVgroupInfo* pVgroupInfo = NULL;
       if (pTableMetaInfo->vgroupList->numOfVgroups > 0) {
         assert(index < pTableMetaInfo->vgroupList->numOfVgroups);
         pVgroupInfo = &pTableMetaInfo->vgroupList->vgroups[index];
       }
+
+      vgId = pVgroupInfo->vgId;
+      tscSetDnodeEpSet(&pSql->epSet, pVgroupInfo);
       tscDebug("%p query on stable, vgIndex:%d, numOfVgroups:%d", pSql, index, pTableMetaInfo->vgroupList->numOfVgroups);
     } else {
-      pVgroupInfo = &pTableMeta->vgroupInfo;
+      vgId = pTableMeta->vgId;
+      tscDumpEpSetFromVgroupInfo(&pSql->epSet, &pTableMeta->corVgroupInfo);
     }
 
-    assert(pVgroupInfo != NULL);
+    pSql->epSet.inUse = rand()%pSql->epSet.numOfEps;
 
-    tscSetDnodeEpSet(pSql, pVgroupInfo);
-    pQueryMsg->head.vgId = htonl(pVgroupInfo->vgId);
+    pQueryMsg->head.vgId = htonl(vgId);
 
     STableIdInfo *pTableIdInfo = (STableIdInfo *)pMsg;
     pTableIdInfo->tid = htonl(pTableMeta->id.tid);
@@ -633,7 +635,7 @@ static char *doSerializeTableInfo(SQueryTableMsg* pQueryMsg, SSqlObj *pSql, char
     SVgroupTableInfo* pTableIdList = taosArrayGet(pTableMetaInfo->pVgroupTables, index);
 
     // set the vgroup info 
-    tscSetDnodeEpSet(pSql, &pTableIdList->vgInfo);
+    tscSetDnodeEpSet(&pSql->epSet, &pTableIdList->vgInfo);
     pQueryMsg->head.vgId = htonl(pTableIdList->vgInfo.vgId);
     
     int32_t numOfTables = (int32_t)taosArrayGetSize(pTableIdList->itemList);
@@ -1448,48 +1450,11 @@ int tscBuildUpdateTagMsg(SSqlObj* pSql, SSqlInfo *pInfo) {
   SQueryInfo *    pQueryInfo = tscGetQueryInfoDetail(pCmd, 0);
   STableMetaInfo *pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
 
-  tscDumpEpSetFromVgroupInfo(&pTableMetaInfo->pTableMeta->corVgroupInfo, &pSql->epSet);
+  tscDumpEpSetFromVgroupInfo(&pSql->epSet, &pTableMetaInfo->pTableMeta->corVgroupInfo);
 
   return TSDB_CODE_SUCCESS;
 }
 
-//int tscBuildCancelQueryMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
-//  SCancelQueryMsg *pCancelMsg = (SCancelQueryMsg*) pSql->cmd.payload;
-//  pCancelMsg->qhandle = htobe64(pSql->res.qhandle);
-//
-//  SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(&pSql->cmd, pSql->cmd.clauseIndex);
-//  STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
-//
-//  if (UTIL_TABLE_IS_SUPER_TABLE(pTableMetaInfo)) {
-//    int32_t vgIndex = pTableMetaInfo->vgroupIndex;
-//    if (pTableMetaInfo->pVgroupTables == NULL) {
-//      SVgroupsInfo *pVgroupInfo = pTableMetaInfo->vgroupList;
-//      assert(pVgroupInfo->vgroups[vgIndex].vgId > 0 && vgIndex < pTableMetaInfo->vgroupList->numOfVgroups);
-//
-//      pCancelMsg->header.vgId = htonl(pVgroupInfo->vgroups[vgIndex].vgId);
-//      tscDebug("%p build cancel query msg from vgId:%d, vgIndex:%d", pSql, pVgroupInfo->vgroups[vgIndex].vgId, vgIndex);
-//    } else {
-//      int32_t numOfVgroups = (int32_t)taosArrayGetSize(pTableMetaInfo->pVgroupTables);
-//      assert(vgIndex >= 0 && vgIndex < numOfVgroups);
-//
-//      SVgroupTableInfo* pTableIdList = taosArrayGet(pTableMetaInfo->pVgroupTables, vgIndex);
-//
-//      pCancelMsg->header.vgId = htonl(pTableIdList->vgInfo.vgId);
-//      tscDebug("%p build cancel query msg from vgId:%d, vgIndex:%d", pSql, pTableIdList->vgInfo.vgId, vgIndex);
-//    }
-//  } else {
-//    STableMeta* pTableMeta = pTableMetaInfo->pTableMeta;
-//    pCancelMsg->header.vgId = htonl(pTableMeta->vgroupInfo.vgId);
-//    tscDebug("%p build cancel query msg from only one vgroup, vgId:%d", pSql, pTableMeta->vgroupInfo.vgId);
-//  }
-//
-//  pSql->cmd.payloadLen = sizeof(SCancelQueryMsg);
-//  pSql->cmd.msgType = TSDB_MSG_TYPE_CANCEL_QUERY;
-//
-//  pCancelMsg->header.contLen = htonl(sizeof(SCancelQueryMsg));
-//  return TSDB_CODE_SUCCESS;
-//}
-
 int tscAlterDbMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
   SSqlCmd *pCmd = &pSql->cmd;
   pCmd->payloadLen = sizeof(SAlterDbMsg);

src/client/src/tscUtil.c

@@ -466,13 +466,6 @@ void tscFreeRegisteredSqlObj(void *pSql) {
 void tscFreeTableMetaHelper(void *pTableMeta) {
   STableMeta* p = (STableMeta*) pTableMeta;
 
-  int32_t numOfEps = p->vgroupInfo.numOfEps;
-  assert(numOfEps >= 0 && numOfEps <= TSDB_MAX_REPLICA);
-
-  for(int32_t i = 0; i < numOfEps; ++i) {
-    tfree(p->vgroupInfo.epAddr[i].fqdn);
-  }
-
   int32_t numOfEps1 = p->corVgroupInfo.numOfEps;
   assert(numOfEps1 >= 0 && numOfEps1 <= TSDB_MAX_REPLICA);
 
@@ -1944,27 +1937,21 @@ SSqlObj* createSimpleSubObj(SSqlObj* pSql, void (*fp)(), void* param, int32_t cm
   pNew->fp      = fp;
   pNew->fetchFp = fp;
   pNew->param   = param;
+  pNew->sqlstr  = NULL;
   pNew->maxRetry = TSDB_MAX_REPLICA;
 
-  pNew->sqlstr = strdup(pSql->sqlstr);
-  if (pNew->sqlstr == NULL) {
-    tscError("%p new subquery failed", pSql);
-    tscFreeSqlObj(pNew);
-    return NULL;
-  }
-
   SQueryInfo* pQueryInfo = tscGetQueryInfoDetailSafely(pCmd, 0);
 
   assert(pSql->cmd.clauseIndex == 0);
   STableMetaInfo* pMasterTableMetaInfo = tscGetTableMetaInfoFromCmd(&pSql->cmd, pSql->cmd.clauseIndex, 0);
 
   tscAddTableMetaInfo(pQueryInfo, pMasterTableMetaInfo->name, NULL, NULL, NULL, NULL);
-
   registerSqlObj(pNew);
+
   return pNew;
 }
 
-static void doSetSqlExprAndResultFieldInfo(SQueryInfo* pQueryInfo, SQueryInfo* pNewQueryInfo, int64_t uid) {
+static void doSetSqlExprAndResultFieldInfo(SQueryInfo* pNewQueryInfo, int64_t uid) {
   int32_t numOfOutput = (int32_t)tscSqlExprNumOfExprs(pNewQueryInfo);
   if (numOfOutput == 0) {
     return;
@@ -2019,13 +2006,7 @@ SSqlObj* createSubqueryObj(SSqlObj* pSql, int16_t tableIndex, void (*fp)(), void
 
   pNew->pTscObj   = pSql->pTscObj;
   pNew->signature = pNew;
-
-  pNew->sqlstr = strdup(pSql->sqlstr);
-  if (pNew->sqlstr == NULL) {
-    tscError("%p new subquery failed, tableIndex:%d, vgroupIndex:%d", pSql, tableIndex, pTableMetaInfo->vgroupIndex);
-    terrno = TSDB_CODE_TSC_OUT_OF_MEMORY;
-    goto _error;
-  }
+  pNew->sqlstr    = NULL;
 
   SSqlCmd* pnCmd = &pNew->cmd;
   memcpy(pnCmd, pCmd, sizeof(SSqlCmd));
@@ -2113,19 +2094,18 @@ SSqlObj* createSubqueryObj(SSqlObj* pSql, int16_t tableIndex, void (*fp)(), void
     goto _error;
   }
 
-  doSetSqlExprAndResultFieldInfo(pQueryInfo, pNewQueryInfo, uid);
+  doSetSqlExprAndResultFieldInfo(pNewQueryInfo, uid);
 
   pNew->fp      = fp;
   pNew->fetchFp = fp;
-
   pNew->param   = param;
   pNew->maxRetry = TSDB_MAX_REPLICA;
 
   char* name = pTableMetaInfo->name;
   STableMetaInfo* pFinalInfo = NULL;
 
-  if (pPrevSql == NULL) {
-    STableMeta* pTableMeta = taosCacheAcquireByData(tscMetaCache, pTableMetaInfo->pTableMeta);  // get by name may failed due to the cache cleanup
+  if (pPrevSql == NULL) { // get by name may failed due to the cache cleanup
+    STableMeta* pTableMeta = taosCacheAcquireByData(tscMetaCache, pTableMetaInfo->pTableMeta);
     assert(pTableMeta != NULL);
 
     pFinalInfo = tscAddTableMetaInfo(pNewQueryInfo, name, pTableMeta, pTableMetaInfo->vgroupList,

src/query/inc/qUtil.h

@@ -34,17 +34,13 @@ int32_t initResultRowInfo(SResultRowInfo* pResultRowInfo, int32_t size, int16_t
 void    cleanupResultRowInfo(SResultRowInfo* pResultRowInfo);
 
 void    resetResultRowInfo(SQueryRuntimeEnv* pRuntimeEnv, SResultRowInfo* pResultRowInfo);
-void    popFrontResultRow(SQueryRuntimeEnv *pRuntimeEnv, SResultRowInfo *pResultRowInfo, int32_t num);
-void    clearClosedResultRows(SQueryRuntimeEnv* pRuntimeEnv, SResultRowInfo *pResultRowInfo);
 int32_t numOfClosedResultRows(SResultRowInfo* pResultRowInfo);
 void    closeAllResultRows(SResultRowInfo* pResultRowInfo);
-void    removeRedundantResultRows(SResultRowInfo *pResultRowInfo, TSKEY lastKey, int32_t order);
 
 int32_t initResultRow(SResultRow *pResultRow);
 void    closeResultRow(SResultRowInfo* pResultRowInfo, int32_t slot);
 bool    isResultRowClosed(SResultRowInfo *pResultRowInfo, int32_t slot);
 void    clearResultRow(SQueryRuntimeEnv* pRuntimeEnv, SResultRow* pResultRow, int16_t type);
-void    copyResultRow(SQueryRuntimeEnv* pRuntimeEnv, SResultRow* dst, const SResultRow* src, int16_t type);
 
 SResultRowCellInfo* getResultCell(SQueryRuntimeEnv* pRuntimeEnv, const SResultRow* pRow, int32_t index);
 

src/query/src/qExecutor.c

@@ -5182,10 +5182,10 @@ static void sequentialTableProcess(SQInfo *pQInfo) {
       scanMultiTableDataBlocks(pQInfo);
       pQInfo->groupIndex += 1;
 
-      SResultRowInfo *pWindowResInfo = &pRuntimeEnv->windowResInfo;
+      taosArrayDestroy(s);
 
       // no results generated for current group, continue to try the next group
-      taosArrayDestroy(s);
+      SResultRowInfo *pWindowResInfo = &pRuntimeEnv->windowResInfo;
       if (pWindowResInfo->size <= 0) {
         continue;
       }
@@ -5212,8 +5212,7 @@ static void sequentialTableProcess(SQInfo *pQInfo) {
 
       pQInfo->groupIndex = currentGroupIndex;  // restore the group index
       assert(pQuery->rec.rows == pWindowResInfo->size);
-
-      clearClosedResultRows(pRuntimeEnv, &pRuntimeEnv->windowResInfo);
+      resetResultRowInfo(pRuntimeEnv, &pRuntimeEnv->windowResInfo);
       break;
     }
   } else if (pRuntimeEnv->queryWindowIdentical && pRuntimeEnv->pTsBuf == NULL && !isTSCompQuery(pQuery)) {

src/query/src/qUtil.c

@@ -20,18 +20,6 @@
 #include "qExecutor.h"
 #include "qUtil.h"
 
-static int32_t getResultRowKeyInfo(SResultRow* pResult, int16_t type, char** key, int16_t* bytes) {
-  if (type == TSDB_DATA_TYPE_BINARY || type == TSDB_DATA_TYPE_NCHAR) {
-    *key   = varDataVal(pResult->key);
-    *bytes = varDataLen(pResult->key);
-  } else {
-    *key = (char*) &pResult->win.skey;
-    *bytes = tDataTypeDesc[type].nSize;
-  }
-
-  return 0;
-}
-
 int32_t getOutputInterResultBufSize(SQuery* pQuery) {
   int32_t size = 0;
 
@@ -99,73 +87,6 @@ void resetResultRowInfo(SQueryRuntimeEnv *pRuntimeEnv, SResultRowInfo *pResultRo
   pResultRowInfo->prevSKey = TSKEY_INITIAL_VAL;
 }
 
-void popFrontResultRow(SQueryRuntimeEnv *pRuntimeEnv, SResultRowInfo *pResultRowInfo, int32_t num) {
-  if (pResultRowInfo == NULL || pResultRowInfo->capacity == 0 || pResultRowInfo->size == 0 || num == 0) {
-    return;
-  }
-  
-  int32_t numOfClosed = numOfClosedResultRows(pResultRowInfo);
-  assert(num >= 0 && num <= numOfClosed);
-
-  int16_t type = pResultRowInfo->type;
-  int64_t uid  = 0;
-
-  char    *key  = NULL;
-  int16_t  bytes = -1;
-
-  for (int32_t i = 0; i < num; ++i) {
-    SResultRow *pResult = pResultRowInfo->pResult[i];
-    if (pResult->closed) {  // remove the window slot from hash table
-      getResultRowKeyInfo(pResult, type, &key, &bytes);
-      SET_RES_WINDOW_KEY(pRuntimeEnv->keyBuf, key, bytes, uid);
-      taosHashRemove(pRuntimeEnv->pResultRowHashTable, (const char *)pRuntimeEnv->keyBuf, GET_RES_WINDOW_KEY_LEN(bytes));
-    } else {
-      break;
-    }
-  }
-  
-  int32_t remain = pResultRowInfo->size - num;
-  
-  // clear all the closed windows from the window list
-  for (int32_t k = 0; k < remain; ++k) {
-    copyResultRow(pRuntimeEnv, pResultRowInfo->pResult[k], pResultRowInfo->pResult[num + k], type);
-  }
-  
-  // move the unclosed window in the front of the window list
-  for (int32_t k = remain; k < pResultRowInfo->size; ++k) {
-    SResultRow *pWindowRes = pResultRowInfo->pResult[k];
-    clearResultRow(pRuntimeEnv, pWindowRes, pResultRowInfo->type);
-  }
-  
-  pResultRowInfo->size = remain;
-
-  for (int32_t k = 0; k < pResultRowInfo->size; ++k) {
-    SResultRow *pResult = pResultRowInfo->pResult[k];
-    getResultRowKeyInfo(pResult, type, &key, &bytes);
-    SET_RES_WINDOW_KEY(pRuntimeEnv->keyBuf, key, bytes, uid);
-
-    int32_t *p = (int32_t *)taosHashGet(pRuntimeEnv->pResultRowHashTable, (const char *)pRuntimeEnv->keyBuf, GET_RES_WINDOW_KEY_LEN(bytes));
-    assert(p != NULL); 
-
-    int32_t  v = (*p - num);
-    assert(v >= 0 && v <= pResultRowInfo->size);
-
-    SET_RES_WINDOW_KEY(pRuntimeEnv->keyBuf, key, bytes, uid);
-    taosHashPut(pRuntimeEnv->pResultRowHashTable, pRuntimeEnv->keyBuf, GET_RES_WINDOW_KEY_LEN(bytes), (char *)&v, sizeof(int32_t));
-  }
-  
-  pResultRowInfo->curIndex = -1;
-}
-
-void clearClosedResultRows(SQueryRuntimeEnv *pRuntimeEnv, SResultRowInfo *pResultRowInfo) {
-  if (pResultRowInfo == NULL || pResultRowInfo->capacity == 0 || pResultRowInfo->size == 0) {
-    return;
-  }
-  
-  int32_t numOfClosed = numOfClosedResultRows(pResultRowInfo);
-  popFrontResultRow(pRuntimeEnv, &pRuntimeEnv->windowResInfo, numOfClosed);
-}
-
 int32_t numOfClosedResultRows(SResultRowInfo *pResultRowInfo) {
   int32_t i = 0;
   while (i < pResultRowInfo->size && pResultRowInfo->pResult[i]->closed) {
@@ -188,40 +109,6 @@ void closeAllResultRows(SResultRowInfo *pResultRowInfo) {
   }
 }
 
-/*
- * remove the results that are not the FIRST time window that spreads beyond the
- * the last qualified time stamp in case of sliding query, which the sliding time is not equalled to the interval time.
- * NOTE: remove redundant, only when the result set order equals to traverse order
- */
-void removeRedundantResultRows(SResultRowInfo *pResultRowInfo, TSKEY lastKey, int32_t order) {
-  assert(pResultRowInfo->size >= 0 && pResultRowInfo->capacity >= pResultRowInfo->size);
-  if (pResultRowInfo->size <= 1) {
-    return;
-  }
-
-  // get the result order
-  int32_t resultOrder = (pResultRowInfo->pResult[0]->win.skey < pResultRowInfo->pResult[1]->win.skey)? 1:-1;
-  if (order != resultOrder) {
-    return;
-  }
-
-  int32_t i = 0;
-  if (order == QUERY_ASC_FORWARD_STEP) {
-    TSKEY ekey = pResultRowInfo->pResult[i]->win.ekey;
-    while (i < pResultRowInfo->size && (ekey < lastKey)) {
-      ++i;
-    }
-  } else if (order == QUERY_DESC_FORWARD_STEP) {
-    while (i < pResultRowInfo->size && (pResultRowInfo->pResult[i]->win.skey > lastKey)) {
-      ++i;
-    }
-  }
-
-  if (i < pResultRowInfo->size) {
-    pResultRowInfo->size = (i + 1);
-  }
-}
-
 bool isResultRowClosed(SResultRowInfo *pResultRowInfo, int32_t slot) {
   return (getResultRow(pResultRowInfo, slot)->closed == true);
 }
@@ -262,47 +149,6 @@ void clearResultRow(SQueryRuntimeEnv *pRuntimeEnv, SResultRow *pResultRow, int16
   }
 }
 
-/**
- * The source window result pos attribution of the source window result does not assign to the destination,
- * since the attribute of "Pos" is bound to each window result when the window result is created in the
- * disk-based result buffer.
- */
-void copyResultRow(SQueryRuntimeEnv *pRuntimeEnv, SResultRow *dst, const SResultRow *src, int16_t type) {
-  dst->numOfRows = src->numOfRows;
-
-  if (type == TSDB_DATA_TYPE_BINARY || type == TSDB_DATA_TYPE_NCHAR) {
-    dst->key = realloc(dst->key, varDataTLen(src->key));
-    varDataCopy(dst->key, src->key);
-  } else {
-    dst->win   = src->win;
-  }
-  dst->closed = src->closed;
-  
-  int32_t nOutputCols = pRuntimeEnv->pQuery->numOfOutput;
-  
-  for (int32_t i = 0; i < nOutputCols; ++i) {
-    SResultRowCellInfo *pDst = getResultCell(pRuntimeEnv, dst, i);
-    SResultRowCellInfo *pSrc = getResultCell(pRuntimeEnv, src, i);
-    
-//    char *buf = pDst->interResultBuf;
-    memcpy(pDst, pSrc, sizeof(SResultRowCellInfo) + pRuntimeEnv->pCtx[i].interBufBytes);
-//    pDst->interResultBuf = buf;  // restore the allocated buffer
-    
-    // copy the result info struct
-//    memcpy(pDst->interResultBuf, pSrc->interResultBuf, pRuntimeEnv->pCtx[i].interBufBytes);
-    
-    // copy the output buffer data from src to dst, the position info keep unchanged
-    tFilePage *dstpage = getResBufPage(pRuntimeEnv->pResultBuf, dst->pageId);
-    char * dstBuf = getPosInResultPage(pRuntimeEnv, i, dst, dstpage);
-
-    tFilePage *srcpage = getResBufPage(pRuntimeEnv->pResultBuf, src->pageId);
-    char * srcBuf = getPosInResultPage(pRuntimeEnv, i, (SResultRow *)src, srcpage);
-    size_t s = pRuntimeEnv->pQuery->pExpr1[i].bytes;
-    
-    memcpy(dstBuf, srcBuf, s);
-  }
-}
-
 SResultRowCellInfo* getResultCell(SQueryRuntimeEnv* pRuntimeEnv, const SResultRow* pRow, int32_t index) {
   assert(index >= 0 && index < pRuntimeEnv->pQuery->numOfOutput);
   return (SResultRowCellInfo*)((char*) pRow->pCellInfo + pRuntimeEnv->rowCellInfoOffset[index]);