diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index 1d717bc84aee490356a6e4d337848eb0dacbd18e..fbdc28c875110376b215d62ec3b38f1c6af90228 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -6110,7 +6110,7 @@ SOperatorInfo* createGroupbyOperatorInfo(SQueryRuntimeEnv* pRuntimeEnv, SOperato
   SQueryAttr *pQueryAttr = pRuntimeEnv->pQueryAttr;
 
   pQueryAttr->resultRowSize = (pQueryAttr->resultRowSize *
-      GET_ROW_PARAM_FOR_MULTIOUTPUT(pQueryAttr, pQueryAttr->topBotQuery, pQueryAttr->stableQuery));
+      (int32_t)(GET_ROW_PARAM_FOR_MULTIOUTPUT(pQueryAttr, pQueryAttr->topBotQuery, pQueryAttr->stableQuery)));
 
   pInfo->binfo.pRes = createOutputBuf(pExpr, numOfOutput, pRuntimeEnv->resultInfo.capacity);
   initResultRowInfo(&pInfo->binfo.resultRowInfo, 8, TSDB_DATA_TYPE_INT);