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| author | Andres Freund <andres@anarazel.de> | 2023-04-07 22:40:27 -0700 |
|---|---|---|
| committer | Andres Freund <andres@anarazel.de> | 2023-04-07 22:40:27 -0700 |
| commit | be87200efd9308ccfe217ce8828f316e93e370da (patch) | |
| tree | f269cd86fdfebf3a15ef3559904f5863caede055 /doc | |
| parent | 2ed16aacf1af1e1a26bffb121a19d1ad5f5177f0 (diff) | |
| download | postgresql-be87200efd9308ccfe217ce8828f316e93e370da.tar.gz | |
Support invalidating replication slots due to horizon and wal_level
Needed for logical decoding on a standby. Slots need to be invalidated because
of the horizon if rows required for logical decoding are removed. If the
primary's wal_level is lowered from 'logical', logical slots on the standby
need to be invalidated.
The new invalidation methods will be used in a subsequent commit.
Logical slots that have been invalidated can be identified via the new
pg_replication_slots.conflicting column.
See 6af1793954e for an overall design of logical decoding on a standby.
Bumps catversion for the addition of the new pg_replication_slots column.
Author: "Drouvot, Bertrand" <bertranddrouvot.pg@gmail.com>
Author: Andres Freund <andres@anarazel.de>
Author: Amit Khandekar <amitdkhan.pg@gmail.com> (in an older version)
Reviewed-by: "Drouvot, Bertrand" <bertranddrouvot.pg@gmail.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Robert Haas <robertmhaas@gmail.com>
Reviewed-by: FabrÃzio de Royes Mello <fabriziomello@gmail.com>
Reviewed-by: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Reviewed-by: Melanie Plageman <melanieplageman@gmail.com>
Reviewed-by: Alvaro Herrera <alvherre@alvh.no-ip.org>
Discussion: https://postgr.es/m/20230407075009.igg7be27ha2htkbt@awork3.anarazel.de
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/src/sgml/system-views.sgml | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/doc/src/sgml/system-views.sgml b/doc/src/sgml/system-views.sgml index bb1a418450..57b228076e 100644 --- a/doc/src/sgml/system-views.sgml +++ b/doc/src/sgml/system-views.sgml @@ -2517,6 +2517,16 @@ SELECT * FROM pg_locks pl LEFT JOIN pg_prepared_xacts ppx false for physical slots. </para></entry> </row> + + <row> + <entry role="catalog_table_entry"><para role="column_definition"> + <structfield>conflicting</structfield> <type>bool</type> + </para> + <para> + True if this logical slot conflicted with recovery (and so is now + invalidated). Always NULL for physical slots. + </para></entry> + </row> </tbody> </tgroup> </table> |