From: David Rowley <drowley@postgresql.org>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: Update wording in optimizer/README for EquivalenceClasses
Date: Thu, 10 Apr 2025 05:34:56 +0000
Message-ID: <E1u2kYy-003YDw-2R@gemulon.postgresql.org> (raw)
Update wording in optimizer/README for EquivalenceClasses
d69d45a5a changed how em_is_child members are stored in
EquivalenceClasses. Children are no longer stored in the ec_members
list. optimizer/README mentioned that most operations "should ignore
child members", but that felt a little untrue now since child members
are now stored in a separate place, they simply won't be found by the
normal means of looking (a foreach loop over ec_members), and if you don't
find them, there's technically no need to "ignore" them.
Here we tweak the wording slightly to reflect the new storage location
for child members.
Reported-by: Amit Langote <amitlangote09@gmail.com>
Author: Amit Langote <amitlangote09@gmail.com>
Author: David Rowley <dgrowleyml@gmail.com>
Discussion: https://postgr.es/m/CA+HiwqE8v=EuAP_3F_A2xn8zWx+nG_etW_Fe_DvKO-Fkx=+DdQ@mail.gmail.com
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/d7c04db27aeba1718d8059eae9a6e6a5eedc01b8
Modified Files
--------------
src/backend/optimizer/README | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
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To: pgsql-committers@postgresql.org
Cc: drowley@postgresql.org, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: Update wording in optimizer/README for EquivalenceClasses
In-Reply-To: <E1u2kYy-003YDw-2R@gemulon.postgresql.org>
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