From c4a1039fdfd9543498810873ea1d4cbfa1d06c9e Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Thu, 1 Oct 2015 10:31:22 -0400
Subject: [PATCH] Fix documentation error in commit
8703059c6b55c427100e00a09f66534b6ccbfaa1.
Etsuro Fujita spotted a thinko in the README commentary.
---
src/backend/optimizer/README | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/backend/optimizer/README b/src/backend/optimizer/README
index 760b700fbbb..b4ee3faabb8 100644
--- a/src/backend/optimizer/README
+++ b/src/backend/optimizer/README
@@ -254,7 +254,7 @@ lower leftjoin has min LHS of {B} and min RHS of {C,D}. Given such
information, join_is_legal would think it's okay to associate the upper
join into the lower join's RHS, transforming the query to
B leftjoin (A leftjoin (C innerjoin D) on Pa) on (Pbcd)
-which yields totally wrong answers. We prevent that by forcing the min LHS
+which yields totally wrong answers. We prevent that by forcing the min RHS
for the upper join to include B. This is perhaps overly restrictive, but
such cases don't arise often so it's not clear that it's worth developing a
more complicated system.
--
GitLab