From beb6599256dd42a6dc5e285e05785f551f340771 Mon Sep 17 00:00:00 2001
From: Haojun Liao <hjliao@taosdata.com>
Date: Tue, 20 Oct 2020 14:07:28 +0800
Subject: [PATCH] [td-1756]

---
 src/client/src/tscSQLParser.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index aaf0450da3..7a8be085eb 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -190,7 +190,8 @@ int32_t tscToSQLCmd(SSqlObj* pSql, struct SSqlInfo* pInfo) {
   SSqlRes* pRes = &pSql->res;
 
   int32_t code = TSDB_CODE_SUCCESS;
-  if (!pInfo->valid || errno == TSDB_CODE_TSC_SQL_SYNTAX_ERROR) {
+  if (!pInfo->valid || terrno == TSDB_CODE_TSC_SQL_SYNTAX_ERROR) {
+    terrno = TSDB_CODE_SUCCESS;  // clear the error number
     return tscSQLSyntaxErrMsg(tscGetErrorMsgPayload(pCmd), NULL, pInfo->pzErrMsg);
   }