From a3200b555cc992bcd06a7d45f93e89a0d0201d72 Mon Sep 17 00:00:00 2001
From: Haojun Liao <hjliao@taosdata.com>
Date: Sat, 3 Dec 2022 17:03:31 +0800
Subject: [PATCH] fix(query): fix null ptr access.

---
 source/util/src/tpagedbuf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source/util/src/tpagedbuf.c b/source/util/src/tpagedbuf.c
index ad08b15c25..37874ae250 100644
--- a/source/util/src/tpagedbuf.c
+++ b/source/util/src/tpagedbuf.c
@@ -49,7 +49,7 @@ struct SDiskbasedBuf {
 };
 
 static int32_t createDiskFile(SDiskbasedBuf* pBuf) {
-  if (pBuf->path[0] == '\0') { // prepare the file name when needed it
+  if (pBuf->path == NULL) { // prepare the file name when needed it
     char path[PATH_MAX] = {0};
     taosGetTmpfilePath(pBuf->prefix, "paged-buf", path);
     pBuf->path = taosMemoryStrDup(path);