From b60de1254657b4705e41cea9813fb9608844f200 Mon Sep 17 00:00:00 2001
From: wpan <wpan@taosdata.com>
Date: Thu, 15 Jul 2021 18:20:53 +0800
Subject: [PATCH] add null protection

---
 src/tsdb/src/tsdbRead.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/tsdb/src/tsdbRead.c b/src/tsdb/src/tsdbRead.c
index 4d36c740b4..0892182f03 100644
--- a/src/tsdb/src/tsdbRead.c
+++ b/src/tsdb/src/tsdbRead.c
@@ -3361,6 +3361,10 @@ static void* doFreeColumnInfoData(SArray* pColumnInfoData) {
 }
 
 static void* destroyTableCheckInfo(SArray* pTableCheckInfo) {
+  if (pTableCheckInfo == NULL) {
+    return NULL;
+  }
+  
   size_t size = taosArrayGetSize(pTableCheckInfo);
   for (int32_t i = 0; i < size; ++i) {
     STableCheckInfo* p = taosArrayGet(pTableCheckInfo, i);
-- 
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