From e304faac7bd29b4f908e0c905ad389f43ea6645b Mon Sep 17 00:00:00 2001
From: wangmm0220 <wangmm0220@gmail.com>
Date: Fri, 24 Sep 2021 11:12:21 +0800
Subject: [PATCH] TD-6129<feature> add tag-> select logic

---
 src/client/src/tscSQLParser.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index 7c2f8e8958..eda338bf73 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -2263,7 +2263,7 @@ int32_t addProjectionExprAndResultField(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, t
       pToken = &left->columnName;
 
       tSqlExpr* right = pItem->pNode->pRight;
-      if(right != NULL || right->type != SQL_NODE_VALUE || right->tokenId != TK_STRING){
+      if(right == NULL || right->type != SQL_NODE_VALUE || right->tokenId != TK_STRING){
         return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg5);
       }
     }else {
-- 
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