Horton

Add callback for I/O error messages in SLRUs

Heikki Linnakangas <heikki.linnakangas@iki.fi>

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Commit: f9de9bf302d2df41da06c6377ba1904883cd9d51
Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
Date: 2026-03-13T14:21:06Z
Releases: 19 (unreleased) 
Add callback for I/O error messages in SLRUs

Historically, all SLRUs were addressed by transaction IDs, but that
hasn't been true for a long time. However, the error message on I/O
error still always talked about accessing a transaction ID.

This commit adds a callback that allows subsystems to construct their
own error messages, which can then correctly refer to a transaction
ID, multixid or whatever else is used to address the particular SLRU.

Author: Maxim Orlov <orlovmg@gmail.com>
Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de>
Discussion: https://www.postgresql.org/message-id/CACG=ezZZfurhYV+66ceubxQAyWqv9vaUi0yoO4-t48OE5xc0DQ@mail.gmail.com

Files

PathChange+/−
src/backend/access/transam/clog.c modified +13 −4
src/backend/access/transam/commit_ts.c modified +11 −2
src/backend/access/transam/multixact.c modified +48 −17
src/backend/access/transam/slru.c modified +43 −36
src/backend/access/transam/subtrans.c modified +12 −2
src/backend/commands/async.c modified +14 −6
src/backend/storage/lmgr/predicate.c modified +12 −2
src/include/access/slru.h modified +13 −2
src/test/modules/test_slru/expected/test_slru.out modified +4 −0
src/test/modules/test_slru/sql/test_slru.sql modified +3 −0
src/test/modules/test_slru/test_slru--1.0.sql modified +1 −1
src/test/modules/test_slru/test_slru.c modified +12 −3
src/tools/pgindent/typedefs.list modified +1 −0

Discussion