fix mem leak issue

src/query/src/qExecutor.c

@@ -4096,15 +4096,13 @@ static SFillColInfo* createFillColInfo(SExprInfo* pExpr, int32_t numOfOutput, in
   return pFillCol;
 }
 
-int32_t doInitQInfo(SQInfo* pQInfo, STSBuf* pTsBuf, SArray* prevResult, void* tsdb, void* sourceOptr, int32_t tbScanner,
+int32_t doInitQInfo(SQInfo* pQInfo, STSBuf* pTsBuf, void* tsdb, void* sourceOptr, int32_t tbScanner,
                     SArray* pOperator, void* param) {
   SQueryRuntimeEnv *pRuntimeEnv = &pQInfo->runtimeEnv;
 
   SQueryAttr *pQueryAttr = pQInfo->runtimeEnv.pQueryAttr;
   pQueryAttr->tsdb = tsdb;
 
-  pRuntimeEnv->prevResult = prevResult;
-
   if (tsdb != NULL) {
     int32_t code = setupQueryHandle(tsdb, pRuntimeEnv, pQInfo->qId, pQueryAttr->stableQuery);
     if (code != TSDB_CODE_SUCCESS) {
@@ -7254,7 +7252,9 @@ int32_t initQInfo(STsBufInfo* pTsBufInfo, void* tsdb, void* sourceOptr, SQInfo*
 
   SArray* prevResult = NULL;
   if (prevResultLen > 0) {
-    prevResult = interResFromBinary(param->prevResult, prevResultLen);
+    prevResult = interResFromBinary(param->prevResult, prevResultLen);    
+    
+    pRuntimeEnv->prevResult = prevResult;
   }
 
   if (tsdb != NULL) {
@@ -7278,7 +7278,7 @@ int32_t initQInfo(STsBufInfo* pTsBufInfo, void* tsdb, void* sourceOptr, SQInfo*
   }
 
   // filter the qualified
-  if ((code = doInitQInfo(pQInfo, pTsBuf, prevResult, tsdb, sourceOptr, param->tableScanOperator, param->pOperator, merger)) != TSDB_CODE_SUCCESS) {
+  if ((code = doInitQInfo(pQInfo, pTsBuf, tsdb, sourceOptr, param->tableScanOperator, param->pOperator, merger)) != TSDB_CODE_SUCCESS) {
     goto _error;
   }