From f26a492c678a6ff79fc33bf27a31374184878592 Mon Sep 17 00:00:00 2001
From: Haojun Liao <hjliao@taosdata.com>
Date: Fri, 18 Nov 2022 14:00:27 +0800
Subject: [PATCH] fix(query): check result size before store it.

---
 source/libs/executor/src/executil.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/source/libs/executor/src/executil.c b/source/libs/executor/src/executil.c
index 68f4319bf4..6ee2dce59b 100644
--- a/source/libs/executor/src/executil.c
+++ b/source/libs/executor/src/executil.c
@@ -1010,7 +1010,10 @@ int32_t getTableList(void* metaHandle, void* pVnode, SScanPhysiNode* pScanNode,
       size_t size = numOfTables * sizeof(uint64_t) + sizeof(int32_t);
       char*  pPayload = taosMemoryMalloc(size);
       *(int32_t*)pPayload = numOfTables;
-      memcpy(pPayload + sizeof(int32_t), taosArrayGet(res, 0), numOfTables * sizeof(uint64_t));
+
+      if (numOfTables > 0) {
+        memcpy(pPayload + sizeof(int32_t), taosArrayGet(res, 0), numOfTables * sizeof(uint64_t));
+      }
 
       metaUidFilterCachePut(metaHandle, pScanNode->suid, context.digest, tListLen(context.digest), pPayload,
           size, 1);