Add pg_dissect_walfile_name()
authorMichael Paquier <michael@paquier.xyz>
Tue, 20 Dec 2022 04:36:27 +0000 (13:36 +0900)
committerMichael Paquier <michael@paquier.xyz>
Tue, 20 Dec 2022 04:36:27 +0000 (13:36 +0900)
commitcca186348929cd75f23ef1b25922386bf38cf99c
treef4b4a6ae944991ef0275fed8eebcd867e40cc0e6
parentb3bb7d12af97f035c3aa3ad8dd41b44d01e2defa
Add pg_dissect_walfile_name()

This function takes in input a WAL segment name and returns a tuple made
of the segment sequence number (dependent on the WAL segment size of the
cluster) and its timeline, as of a thin SQL wrapper around the existing
XLogFromFileName().

This function has multiple usages, like being able to compile a LSN from
a file name and an offset, or finding the timeline of a segment without
having to do to some maths based on the first eight characters of the
segment.

Bump catalog version.

Author: Bharath Rupireddy
Reviewed-by: Nathan Bossart, Kyotaro Horiguchi, Maxim Orlov, Michael
Paquier
Discussion: https://postgr.es/m/CALj2ACWV=FCddsxcGbVOA=cvPyMr75YCFbSQT6g4KDj=gcJK4g@mail.gmail.com
doc/src/sgml/func.sgml
src/backend/access/transam/xlogfuncs.c
src/include/catalog/catversion.h
src/include/catalog/pg_proc.dat
src/test/regress/expected/misc_functions.out
src/test/regress/sql/misc_functions.sql