[td-13288]fix crash when querying empty child table.

21ecacf4 · Haojun Liao · ac567bac · 21ecacf4
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source/libs/executor/src/executorimpl.c source/libs/executor/src/executorimpl.c +1 -1

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--- a/source/libs/executor/src/executorimpl.c
+++ b/source/libs/executor/src/executorimpl.c
@@ -5896,7 +5896,7 @@ static SSDataBlock* doAggregate(void* param, bool* newgroup) {
  finalizeQueryResult(pOperator, pInfo->pCtx, &pInfo->resultRowInfo, pInfo->rowCellInfoOffset);
  pInfo->pRes->info.rows = getNumOfResult(pInfo->pCtx, pOperator->numOfOutput);

-  return pInfo->pRes;
+  return (pInfo->pRes->info.rows != 0)? pInfo->pRes:NULL;
 }

 static SSDataBlock* doSTableAggregate(void* param, bool* newgroup) {