From f86c8d0d6e4b926195a47cf7c168b37700dea12d Mon Sep 17 00:00:00 2001
From: Xiaoyu Wang <xiaoyuwang@taosdata.com>
Date: Sun, 19 Mar 2023 14:40:16 +0800
Subject: [PATCH] enh: optimize last pruning logic

---
 source/dnode/vnode/src/tsdb/tsdbCacheRead.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source/dnode/vnode/src/tsdb/tsdbCacheRead.c b/source/dnode/vnode/src/tsdb/tsdbCacheRead.c
index ac0eb697fc..ad93cc567c 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCacheRead.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCacheRead.c
@@ -408,7 +408,7 @@ int32_t tsdbRetrieveCacheRows(void* pReader, SSDataBlock* pResBlock, const int32
         }
 
         if (hasNotNullRow) {
-          if (INT64_MAX == totalLastTs || totalLastTs < singleTableLastTs) {
+          if (INT64_MAX == totalLastTs || (INT64_MAX != singleTableLastTs && totalLastTs < singleTableLastTs)) {
             totalLastTs = singleTableLastTs;
           }
           double cost = (taosGetTimestampUs() - st) / 1000.0;