From: Alexander Korotkov <akorotkov@postgresql.org>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: Further improve commentary about ChangeVarNodesWalkExpression()
Date: Tue, 24 Mar 2026 07:54:38 +0000
Message-ID: <E1w4waz-001CtR-1v@gemulon.postgresql.org> (raw)
Further improve commentary about ChangeVarNodesWalkExpression()
The updated comment explains why we use ChangeVarNodes_walker() instead of
expression_tree_walker(), and provides a bit more detail about the differences
in processing top-level Query and subqueries.
Author: Alexander Korotkov <aekorotkov@gmail.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/CAPpHfdvbjq342WTQ705Wmqhe8794pcp7wospz%2BWUJ2qB7vuOqA%40mail.gmail.com
Backpatch-through: 18
Branch
------
REL_18_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/8c73ab9da9f191e07d5e1c11b59e2dcbde8cafb8
Modified Files
--------------
src/backend/rewrite/rewriteManip.c | 16 +++++++++++-----
1 file changed, 11 insertions(+), 5 deletions(-)
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To: pgsql-committers@postgresql.org
Cc: akorotkov@postgresql.org, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: Further improve commentary about ChangeVarNodesWalkExpression()
In-Reply-To: <E1w4waz-001CtR-1v@gemulon.postgresql.org>
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