From eabbe88f0e19a7da34e4a403924871879eda6647 Mon Sep 17 00:00:00 2001
From: Haojun Liao <hjliao@taosdata.com>
Date: Thu, 15 Jul 2021 17:45:42 +0800
Subject: [PATCH] [td-255]

---
 src/query/src/qExecutor.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index dbcea4e90c..ecbfe36ee3 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -2340,6 +2340,7 @@ static void updateDataCheckOrder(SQInfo *pQInfo, SQueryTableMsg* pQueryMsg, bool
       }
 
       pQueryAttr->order.order = TSDB_ORDER_ASC;
+      pQueryAttr->needReverseScan = false;
     } else if (onlyLastQuery(pQueryAttr) && notContainSessionOrStateWindow(pQueryAttr)) {
       if (QUERY_IS_ASC_QUERY(pQueryAttr)) {
         qDebug(msg, pQInfo, "only-last", pQueryAttr->order.order, TSDB_ORDER_DESC, pQueryAttr->window.skey,
@@ -2350,9 +2351,9 @@ static void updateDataCheckOrder(SQInfo *pQInfo, SQueryTableMsg* pQueryMsg, bool
       }
 
       pQueryAttr->order.order = TSDB_ORDER_DESC;
+      pQueryAttr->needReverseScan = false;
     }
 
-    pQueryAttr->needReverseScan = false;
   } else {  // interval query
     if (stableQuery) {
       if (onlyFirstQuery(pQueryAttr)) {
-- 
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