From dac9a5ae9b83f0bfe96018e313b8d0d83d8a40f0 Mon Sep 17 00:00:00 2001
From: Haojun Liao <hjliao@taosdata.com>
Date: Fri, 26 Jul 2024 23:38:51 +0800
Subject: [PATCH] fix(stream): allowed null value for input

---
 source/libs/executor/src/tsort.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/source/libs/executor/src/tsort.c b/source/libs/executor/src/tsort.c
index 7d2386ba7c..fe32a8939f 100644
--- a/source/libs/executor/src/tsort.c
+++ b/source/libs/executor/src/tsort.c
@@ -169,7 +169,8 @@ static void* tupleGetField(char* t, uint32_t colIdx, uint32_t colNum) {
 
 int32_t tsortGetSortedDataBlock(const SSortHandle* pSortHandle, SSDataBlock** pBlock) {
   if (pBlock == NULL) {
-    return TSDB_CODE_INVALID_PARA;
+    *pBlock = NULL;
+    return TSDB_CODE_SUCCESS;
   }
 
   *pBlock = createOneDataBlock(pSortHandle->pDataBlock, false);