diff --git a/src/client/src/tscLocalMerge.c b/src/client/src/tscLocalMerge.c
index 4a894f8008..b07c7ca66d 100644
--- a/src/client/src/tscLocalMerge.c
+++ b/src/client/src/tscLocalMerge.c
@@ -1637,7 +1637,7 @@ void doArithmeticCalculate(SQueryInfo* pQueryInfo, tFilePage* pOutput, int32_t r
     // calculate the result from several other columns
     if (pSup->pArithExprInfo != NULL) {
       arithSup.pArithExpr = pSup->pArithExprInfo;
-      tExprTreeCalcTraverse(arithSup.pArithExpr->pExpr, pOutput->num, pbuf + pOutput->num*offset, &arithSup, TSDB_ORDER_ASC, getArithemicInputSrc);
+      tExprTreeCalcTraverse(arithSup.pArithExpr->pExpr, (int32_t) pOutput->num, pbuf + pOutput->num*offset, &arithSup, TSDB_ORDER_ASC, getArithemicInputSrc);
     } else {
       SSqlExpr* pExpr = pSup->pSqlExpr;
       memcpy(pbuf + pOutput->num * offset, pExpr->offset * pOutput->num + pOutput->data, pExpr->resBytes * pOutput->num);