From 31bcadc68c8398deb07e7e89fac423605f06860e Mon Sep 17 00:00:00 2001
From: Cai-Yao <729673078@qq.com>
Date: Tue, 29 Oct 2024 08:14:24 +0000
Subject: [PATCH] [CP] fix sysbench newsort degradation

---
 src/sql/optimizer/ob_optimizer_util.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/sql/optimizer/ob_optimizer_util.cpp b/src/sql/optimizer/ob_optimizer_util.cpp
index 59be17b3f1..fcdb2c71bd 100644
--- a/src/sql/optimizer/ob_optimizer_util.cpp
+++ b/src/sql/optimizer/ob_optimizer_util.cpp
@@ -9017,6 +9017,8 @@ int ObOptimizerUtil::check_can_encode_sortkey(const common::ObIArray<OrderItem>
       LOG_WARN("failed to estimate width for output join column exprs", K(ret));
     } else if (avg_len > 256) {
       can_sort_opt = false;
+    } else if (card < 1000) {
+      can_sort_opt = false;
     } else if (avg_len < 64 && card < 100000) {
       can_sort_opt = false;
     } else if (avg_len > 64 && avg_len < 128 && card < 1500000 ) {