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| author | Fujii Masao <fujii@postgresql.org> | 2022-07-12 09:31:57 +0900 |
|---|---|---|
| committer | Fujii Masao <fujii@postgresql.org> | 2022-07-20 09:56:42 +0900 |
| commit | ee79647769f54076422a18845f12e106a34c5f87 (patch) | |
| tree | 0158c23617b38f633056809cfb5f456e1d0671e0 /src/backend/tcop/postgres.c | |
| parent | 12c254c99f6c6f0bbfc7997ee10ea73fee30dea2 (diff) | |
| download | postgresql-ee79647769f54076422a18845f12e106a34c5f87.tar.gz postgresql-ee79647769f54076422a18845f12e106a34c5f87.zip | |
Prevent BASE_BACKUP in the middle of another backup in the same session.
Multiple non-exclusive backups are able to be run conrrently in different
sessions. But, in the same session, only one non-exclusive backup can be
run at the same moment. If pg_backup_start (pg_start_backup in v14 or before)
is called in the middle of another non-exclusive backup in the same session,
an error is thrown.
However, previously, in logical replication walsender mode, even if that
walsender session had already called pg_backup_start and started
a non-exclusive backup, it could execute BASE_BACKUP command and
start another non-exclusive backup. Which caused subsequent pg_backup_stop
to throw an error because BASE_BACKUP unexpectedly reset the session state
marked by pg_backup_start.
This commit prevents BASE_BACKUP command in the middle of another
non-exclusive backup in the same session.
Back-patch to all supported branches.
Author: Fujii Masao
Reviewed-by: Kyotaro Horiguchi, Masahiko Sawada, Michael Paquier, Robert Haas
Discussion: https://postgr.es/m/3374718f-9fbf-a950-6d66-d973e027f44c@oss.nttdata.com
Diffstat (limited to 'src/backend/tcop/postgres.c')
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