From 246bc397bb4c0d653f3aac91b7104db4f0d28dd6 Mon Sep 17 00:00:00 2001
From: wangmm0220 <wangmm0220@gmail.com>
Date: Wed, 25 Aug 2021 17:48:26 +0800
Subject: [PATCH] [TD-6167]<fix> process stmt is null in stmt_close

---
 src/client/src/tscPrepare.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/client/src/tscPrepare.c b/src/client/src/tscPrepare.c
index 1ccdef1ced..12ae0ef8f5 100644
--- a/src/client/src/tscPrepare.c
+++ b/src/client/src/tscPrepare.c
@@ -1781,8 +1781,8 @@ int taos_stmt_set_tbname(TAOS_STMT* stmt, const char* name) {
 
 int taos_stmt_close(TAOS_STMT* stmt) {
   STscStmt* pStmt = (STscStmt*)stmt;
-  if (pStmt == NULL){
-    STMT_RET(TSDB_CODE_SUCCESS);
+  if (stmt == NULL || pStmt->pSql == NULL || pStmt->taos == NULL) {
+    STMT_RET(TSDB_CODE_TSC_DISCONNECTED);
   }
   if (!pStmt->isInsert) {
     SNormalStmt* normal = &pStmt->normal;
-- 
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