From 1101d7d947f67fe5340a5dfab010d69792acef80 Mon Sep 17 00:00:00 2001
From: lihangyu <15605149486@163.com>
Date: Mon, 17 Jul 2023 12:46:28 +0800
Subject: [PATCH] [chore](topn opt) disable two phase read when light schema
 change is disabled (#21809)

---
 .../src/main/java/org/apache/doris/analysis/SelectStmt.java    | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fe/fe-core/src/main/java/org/apache/doris/analysis/SelectStmt.java b/fe/fe-core/src/main/java/org/apache/doris/analysis/SelectStmt.java
index 468fd07284..e2ce149c4d 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/analysis/SelectStmt.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/analysis/SelectStmt.java
@@ -758,6 +758,9 @@ public class SelectStmt extends QueryStmt {
             LOG.debug("only support duplicate key or MOW model");
             return false;
         }
+        if (!olapTable.getEnableLightSchemaChange()) {
+            return false;
+        }
         if (getOrderByElements() != null) {
             if (!evaluateOrderBy) {
                 // Need evaluate orderby, if sort node was eliminated then this optmization