From be87200efd9308ccfe217ce8828f316e93e370da Mon Sep 17 00:00:00 2001 From: Andres Freund Date: Fri, 7 Apr 2023 22:40:27 -0700 Subject: Support invalidating replication slots due to horizon and wal_level MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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" Author: Andres Freund Author: Amit Khandekar (in an older version) Reviewed-by: "Drouvot, Bertrand" Reviewed-by: Andres Freund Reviewed-by: Robert Haas Reviewed-by: Fabrízio de Royes Mello Reviewed-by: Bharath Rupireddy Reviewed-by: Amit Kapila Reviewed-by: Melanie Plageman Reviewed-by: Alvaro Herrera Discussion: https://postgr.es/m/20230407075009.igg7be27ha2htkbt@awork3.anarazel.de --- src/backend/replication/logical/logical.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'src/backend/replication/logical/logical.c') diff --git a/src/backend/replication/logical/logical.c b/src/backend/replication/logical/logical.c index 6082d222d5d..6ecea3c49c5 100644 --- a/src/backend/replication/logical/logical.c +++ b/src/backend/replication/logical/logical.c @@ -531,6 +531,13 @@ CreateDecodingContext(XLogRecPtr start_lsn, NameStr(MyReplicationSlot->data.name)), errdetail("This slot has been invalidated because it exceeded the maximum reserved size."))); + if (MyReplicationSlot->data.invalidated != RS_INVAL_NONE) + ereport(ERROR, + (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE), + errmsg("can no longer get changes from replication slot \"%s\"", + NameStr(MyReplicationSlot->data.name)), + errdetail("This slot has been invalidated because it was conflicting with recovery."))); + Assert(MyReplicationSlot->data.invalidated == RS_INVAL_NONE); Assert(MyReplicationSlot->data.restart_lsn != InvalidXLogRecPtr); -- cgit v1.2.3