From 136c7122626f0d7dfff55395ec8fb4936286933f Mon Sep 17 00:00:00 2001
From: liu0x54 <tliu@taosdata.com>
Date: Tue, 21 Apr 2020 21:34:27 +0800
Subject: [PATCH] [TD162]Check the func return pointer to avoid NULL 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..210c63adb6 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;
 }
 
-- 
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