From ed182b458cc6c0b8e9f7d2f52acea2a4972f57c4 Mon Sep 17 00:00:00 2001
From: liu0x54 <tliu@taosdata.com>
Date: Tue, 21 Apr 2020 20:32:14 +0800
Subject: [PATCH] [TD-162]add return value judgement to avoid NULL pointer
 access

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

diff --git a/src/client/src/tscSql.c b/src/client/src/tscSql.c
index a0089379a9..a5990abf32 100644
--- a/src/client/src/tscSql.c
+++ b/src/client/src/tscSql.c
@@ -321,6 +321,9 @@ TAOS_FIELD *taos_fetch_fields(TAOS_RES *res) {
   if (pSql == NULL || pSql->signature != pSql) return 0;
 
   SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(&pSql->cmd, 0);
+  if(NULL == pQueryInfo) {
+    return NULL;  
+  }
   return pQueryInfo->fieldsInfo.pFields;
 }
 
-- 
GitLab