diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index c77e95b27168c4694b77cc21a76385851992bf79..568364d8b3871dc405f8b0696a6c821fab4bcbb8 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -3486,7 +3486,7 @@ static int32_t createTagColumnInfo(SQueryAttr* pQueryAttr, SQueryInfo* pQueryInf
     return TSDB_CODE_SUCCESS;
   }
 
-  pQueryAttr->numOfTags = (int32_t)taosArrayGetSize(pTableMetaInfo->tagColList);
+  pQueryAttr->numOfTags = (int16_t)taosArrayGetSize(pTableMetaInfo->tagColList);
   if (pQueryAttr->numOfTags == 0) {
     return TSDB_CODE_SUCCESS;
   }