From: Melanie Plageman <melanieplageman@gmail.com>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: Pass down information on table modification to scan nodes
Date: Mon, 30 Mar 2026 17:30:21 +0000
Message-ID: <E1w7GRR-002BFI-07@gemulon.postgresql.org> (raw)
Pass down information on table modification to scan nodes
Pass down information to sequential scan, index [only] scan, bitmap
table scan, sample scan, and TID range scan nodes on whether or not the
query modifies the relation being scanned. A later commit will use this
information to update the VM during on-access pruning only if the
relation is not modified by the query.
Author: Melanie Plageman <melanieplageman@gmail.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Andrey Borodin <x4mmm@yandex-team.ru>
Reviewed-by: Tomas Vondra <tomas@vondra.me>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://postgr.es/m/4379FDA3-9446-4E2C-9C15-32EFE8D4F31B%40yandex-team.ru
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/50eb5faea2959125a575bae0a062ccb33b49c43d
Modified Files
--------------
src/backend/executor/execUtils.c | 21 +++++++++++++++++++++
src/backend/executor/nodeBitmapHeapscan.c | 3 ++-
src/backend/executor/nodeIndexonlyscan.c | 9 ++++++---
src/backend/executor/nodeIndexscan.c | 12 ++++++++----
src/backend/executor/nodeSamplescan.c | 3 ++-
src/backend/executor/nodeSeqscan.c | 10 +++++++---
src/backend/executor/nodeTidrangescan.c | 11 ++++++++---
src/include/access/tableam.h | 3 +++
src/include/executor/executor.h | 2 ++
9 files changed, 59 insertions(+), 15 deletions(-)
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To: pgsql-committers@postgresql.org
Cc: melanieplageman@gmail.com, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: Pass down information on table modification to scan nodes
In-Reply-To: <E1w7GRR-002BFI-07@gemulon.postgresql.org>
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