From 0d3c5cdc8f49e4bd1dd6f3f6b3d80113c6410e62 Mon Sep 17 00:00:00 2001
From: TotaJ <totaj@qq.com>
Date: Fri, 12 Mar 2021 14:18:48 +0800
Subject: [PATCH] Fix cost_index.

---
 src/gausskernel/optimizer/path/costsize.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/gausskernel/optimizer/path/costsize.cpp b/src/gausskernel/optimizer/path/costsize.cpp
index fa6a6bc62..406c8d1ba 100644
--- a/src/gausskernel/optimizer/path/costsize.cpp
+++ b/src/gausskernel/optimizer/path/costsize.cpp
@@ -1252,6 +1252,7 @@ void cost_index(IndexPath* path, PlannerInfo* root, double loop_count)
                     pages_fetched, min_IO_cost)));
     }
 
+    min_IO_cost = Min(min_IO_cost, max_IO_cost);
     /*
      * Now interpolate based on estimated index order correlation to get total
      * disk I/O cost for main table accesses.