From 6756c6515a8693da6f3e577ff142e60e05cd9025 Mon Sep 17 00:00:00 2001
From: Haojun Liao <hjliao@taosdata.com>
Date: Sat, 16 Jul 2022 19:54:14 +0800
Subject: [PATCH] fix(query): add null pointer check.

---
 source/libs/executor/src/tsort.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/source/libs/executor/src/tsort.c b/source/libs/executor/src/tsort.c
index caa3ba3cf3..cd8470883b 100644
--- a/source/libs/executor/src/tsort.c
+++ b/source/libs/executor/src/tsort.c
@@ -109,6 +109,10 @@ static int32_t sortComparClearup(SMsortComparParam* cmpParam) {
 }
 
 void tsortDestroySortHandle(SSortHandle* pSortHandle) {
+  if (pSortHandle == NULL) {
+    return;
+  }
+
   tsortClose(pSortHandle);
   if (pSortHandle->pMergeTree != NULL) {
     tMergeTreeDestroy(pSortHandle->pMergeTree);
-- 
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