diff --git a/source/libs/parser/src/parTranslater.c b/source/libs/parser/src/parTranslater.c
index 4fe3d24b8a..c51ec31b81 100644
--- a/source/libs/parser/src/parTranslater.c
+++ b/source/libs/parser/src/parTranslater.c
@@ -797,12 +797,15 @@ static SNode* createMultiResFunc(SFunctionNode* pSrcFunc, SExprNode* pExpr) {
   pFunc->funcId = pSrcFunc->funcId;
   pFunc->funcType = pSrcFunc->funcType;
   strcpy(pFunc->functionName, pSrcFunc->functionName);
+  char buf[TSDB_FUNC_NAME_LEN + TSDB_TABLE_NAME_LEN + TSDB_COL_NAME_LEN];
+  int32_t len = 0;
   if (QUERY_NODE_COLUMN == nodeType(pExpr)) {
     SColumnNode* pCol = (SColumnNode*)pExpr;
-    snprintf(pFunc->node.aliasName, sizeof(pFunc->node.aliasName), "%s(%s.%s)", pSrcFunc->functionName, pCol->tableAlias, pCol->colName);
+    len = snprintf(buf, sizeof(buf), "%s(%s.%s)", pSrcFunc->functionName, pCol->tableAlias, pCol->colName);
   } else {
-    snprintf(pFunc->node.aliasName, sizeof(pFunc->node.aliasName), "%s(%s)", pSrcFunc->functionName, pExpr->aliasName);
+    len = snprintf(buf, sizeof(buf), "%s(%s)", pSrcFunc->functionName, pExpr->aliasName);
   }
+  strncpy(pFunc->node.aliasName, buf, TMIN(len, sizeof(pFunc->node.aliasName) - 1));
 
   return (SNode*)pFunc;
 }