From e81c7324dbd109d19b0eff14681b8058a4cf3eaf Mon Sep 17 00:00:00 2001
From: lichuang <lichuang1982@gmail.com>
Date: Fri, 4 Jun 2021 11:23:01 +0800
Subject: [PATCH] [TD-3963]fix cache_last_row bug

---
 src/tsdb/src/tsdbMain.c     | 3 +--
 src/tsdb/src/tsdbMemTable.c | 1 -
 2 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/src/tsdb/src/tsdbMain.c b/src/tsdb/src/tsdbMain.c
index 3a375ec59c..5a4c785f02 100644
--- a/src/tsdb/src/tsdbMain.c
+++ b/src/tsdb/src/tsdbMain.c
@@ -907,13 +907,12 @@ int tsdbCacheLastData(STsdbRepo *pRepo, STsdbCfg* oldCfg) {
       atomic_store_8(&pRepo->hasCachedLastColumn, 0);
     }
     tsdbInfo("free cache last data since cacheLast option changed");    
-    for (int i = 1; i < maxTableIdx; i++) {
+    for (int i = 1; i <= maxTableIdx; i++) {
       STable *pTable = pMeta->tables[i];
       if (pTable == NULL) continue;   
       if (need_free_last_row) {
         taosTZfree(pTable->lastRow);
         pTable->lastRow = NULL;
-        pTable->lastKey = TSKEY_INITIAL_VAL;
       }
       if (need_free_last_col) {
         tsdbFreeLastColumns(pTable);
diff --git a/src/tsdb/src/tsdbMemTable.c b/src/tsdb/src/tsdbMemTable.c
index 1f88474f8e..ec773dbb38 100644
--- a/src/tsdb/src/tsdbMemTable.c
+++ b/src/tsdb/src/tsdbMemTable.c
@@ -1030,7 +1030,6 @@ static int tsdbUpdateTableLatestInfo(STsdbRepo *pRepo, STable *pTable, SDataRow
     taosTZfree(pTable->lastRow);
     TSDB_WLOCK_TABLE(pTable);
     pTable->lastRow = NULL;
-    pTable->lastKey = TSKEY_INITIAL_VAL;
     TSDB_WUNLOCK_TABLE(pTable);
   }
 
-- 
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