v2-0001-Improve-left-deep-tree-dp-algorithm-s-readability.patch

From 5b038577cf4f8acdc094d6e41d3891b559016cae Mon Sep 17 00:00:00 2001
From: DouEnergy <douenergy@protonmail.com>
Date: Tue, 6 Jun 2023 15:30:14 +0800
Subject: [PATCH v2] Improve left deep tree dp algorithm's readability

---
 src/backend/optimizer/path/joinrels.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/backend/optimizer/path/joinrels.c b/src/backend/optimizer/path/joinrels.c
index 2feab2184f..a283e574f3 100644
--- a/src/backend/optimizer/path/joinrels.c
+++ b/src/backend/optimizer/path/joinrels.c
@@ -109,14 +109,14 @@ join_search_one_level(PlannerInfo *root, int level)
 			List	   *other_rels_list;
 			ListCell   *other_rels;
 
+			other_rels_list = joinrels[1];
+
 			if (level == 2)		/* consider remaining initial rels */
 			{
-				other_rels_list = joinrels[level - 1];
 				other_rels = lnext(other_rels_list, r);
 			}
 			else				/* consider all initial rels */
 			{
-				other_rels_list = joinrels[1];
 				other_rels = list_head(other_rels_list);
 			}
 
-- 
2.37.1 (Apple Git-137.1)