[td-225] fix the taosd crashed by too many empty table with group by tbname query.

src/system/detail/inc/vnodeQueryImpl.h

@@ -162,7 +162,7 @@ void    disableFunctForSuppleScan(STableQuerySupportObj* pSupporter, int32_t ord
 void    enableFunctForMasterScan(SQueryRuntimeEnv* pRuntimeEnv, int32_t order);
 
 int32_t mergeMetersResultToOneGroups(STableQuerySupportObj* pSupporter);
-void    copyFromWindowResToSData(SQInfo* pQInfo, SWindowResult* result);
+void    copyFromWindowResToSData(SQInfo* pQInfo, SWindowResult* result, int32_t numOfWindowRes);
 
 SBlockInfo getBlockInfo(SQueryRuntimeEnv *pRuntimeEnv);
 SBlockInfo getBlockBasicInfo(SQueryRuntimeEnv *pRuntimeEnv, void* pBlock, int32_t type);

src/system/detail/src/vnodeQueryImpl.c

@@ -7698,7 +7698,7 @@ static int32_t getNumOfSubset(STableQuerySupportObj *pSupporter) {
   return totalSubset;
 }
 
-static int32_t doCopyToSData(STableQuerySupportObj *pSupporter, SWindowResult *result, int32_t orderType) {
+static int32_t doCopyToSData(STableQuerySupportObj *pSupporter, SWindowResult *result, int32_t numOfWindowRes, int32_t orderType) {
   SQueryRuntimeEnv *pRuntimeEnv = &pSupporter->runtimeEnv;
   SQuery *          pQuery = pRuntimeEnv->pQuery;
 
@@ -7717,7 +7717,7 @@ static int32_t doCopyToSData(STableQuerySupportObj *pSupporter, SWindowResult *r
     step = -1;
   }
 
-  for (int32_t i = startIdx; (i < totalSubset) && (i >= 0); i += step) {
+  for (int32_t i = startIdx; (i < totalSubset && i < numOfWindowRes) && (i >= 0); i += step) {
     if (result[i].numOfRows == 0) {
       pSupporter->offset = 0;
       pSupporter->subgroupIdx += 1;
@@ -7772,12 +7772,12 @@ static int32_t doCopyToSData(STableQuerySupportObj *pSupporter, SWindowResult *r
  * @param pQInfo
  * @param result
  */
-void copyFromWindowResToSData(SQInfo *pQInfo, SWindowResult *result) {
+void copyFromWindowResToSData(SQInfo *pQInfo, SWindowResult *result, int32_t numOfWindowRes) {
   SQuery *               pQuery = &pQInfo->query;
   STableQuerySupportObj *pSupporter = pQInfo->pTableQuerySupporter;
 
   int32_t orderType = (pQuery->pGroupbyExpr != NULL) ? pQuery->pGroupbyExpr->orderType : TSQL_SO_ASC;
-  int32_t numOfResult = doCopyToSData(pSupporter, result, orderType);
+  int32_t numOfResult = doCopyToSData(pSupporter, result, numOfWindowRes, orderType);
 
   pQuery->pointsRead += numOfResult;
   assert(pQuery->pointsRead <= pQuery->pointsToRead);

src/system/detail/src/vnodeQueryProcess.c

@@ -664,7 +664,7 @@ static void vnodeSTableSeqProcessor(SQInfo *pQInfo) {
      * we need to return it to client in the first place.
      */
     if (pSupporter->subgroupIdx > 0) {
-      copyFromWindowResToSData(pQInfo, pRuntimeEnv->windowResInfo.pResult);
+      copyFromWindowResToSData(pQInfo, pRuntimeEnv->windowResInfo.pResult, pRuntimeEnv->windowResInfo.size);
       pQInfo->pointsRead += pQuery->pointsRead;
 
       if (pQuery->pointsRead > 0) {
@@ -815,7 +815,7 @@ static void vnodeSTableSeqProcessor(SQInfo *pQInfo) {
 
     pQInfo->pTableQuerySupporter->subgroupIdx = 0;
     pQuery->pointsRead = 0;
-    copyFromWindowResToSData(pQInfo, pWindowResInfo->pResult);
+    copyFromWindowResToSData(pQInfo, pWindowResInfo->pResult, pWindowResInfo->size);
   }
 
   pQInfo->pointsRead += pQuery->pointsRead;
@@ -917,7 +917,7 @@ static void vnodeMultiMeterQueryProcessor(SQInfo *pQInfo) {
       displayInterResult(pQuery->sdata, pQuery, pQuery->sdata[0]->len);
 #endif
     } else {
-      copyFromWindowResToSData(pQInfo, pRuntimeEnv->windowResInfo.pResult);
+      copyFromWindowResToSData(pQInfo, pRuntimeEnv->windowResInfo.pResult, pRuntimeEnv->windowResInfo.size);
     }
 
     pQInfo->pointsRead += pQuery->pointsRead;
@@ -975,7 +975,7 @@ static void vnodeMultiMeterQueryProcessor(SQInfo *pQInfo) {
 #endif
     }
   } else {  // not a interval query
-    copyFromWindowResToSData(pQInfo, pRuntimeEnv->windowResInfo.pResult);
+    copyFromWindowResToSData(pQInfo, pRuntimeEnv->windowResInfo.pResult, pRuntimeEnv->windowResInfo.size);
   }
 
   // handle the limitation of output buffer
@@ -1136,7 +1136,7 @@ static void vnodeSingleTableIntervalProcessor(SQInfo *pQInfo) {
     if (pQuery->intervalTime > 0) {
       pSupporter->subgroupIdx = 0;  // always start from 0
       pQuery->pointsRead = 0;
-      copyFromWindowResToSData(pQInfo, pRuntimeEnv->windowResInfo.pResult);
+      copyFromWindowResToSData(pQInfo, pRuntimeEnv->windowResInfo.pResult, pRuntimeEnv->windowResInfo.size);
 
       clearFirstNTimeWindow(pRuntimeEnv, pSupporter->subgroupIdx);
     }
@@ -1172,7 +1172,7 @@ static void vnodeSingleTableIntervalProcessor(SQInfo *pQInfo) {
   if (isGroupbyNormalCol(pQuery->pGroupbyExpr)) {//todo refactor with merge interval time result
     pSupporter->subgroupIdx = 0;
     pQuery->pointsRead = 0;
-    copyFromWindowResToSData(pQInfo, pRuntimeEnv->windowResInfo.pResult);
+    copyFromWindowResToSData(pQInfo, pRuntimeEnv->windowResInfo.pResult, pRuntimeEnv->windowResInfo.size);
     clearFirstNTimeWindow(pRuntimeEnv, pSupporter->subgroupIdx);
   }
 
@@ -1249,7 +1249,7 @@ void vnodeSingleTableQuery(SSchedMsg *pMsg) {
       pSupporter->subgroupIdx = 0;  // always start from 0
 
       if (pRuntimeEnv->windowResInfo.size > 0) {
-        copyFromWindowResToSData(pQInfo, pRuntimeEnv->windowResInfo.pResult);
+        copyFromWindowResToSData(pQInfo, pRuntimeEnv->windowResInfo.pResult, pRuntimeEnv->windowResInfo.size);
         pQInfo->pointsRead += pQuery->pointsRead;
 
         clearFirstNTimeWindow(pRuntimeEnv, pSupporter->subgroupIdx);