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Logical decoding of TRUNCATE

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Add a new WAL record type for TRUNCATE, which is only used when
wal_level >= logical.  (For physical replication, TRUNCATE is already
replicated via SMGR records.)  Add new callback for logical decoding
output plugins to receive TRUNCATE actions.

Author: Simon Riggs <simon@2ndquadrant.com>
Author: Marco Nenciarini <marco.nenciarini@2ndquadrant.it>
Author: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Reviewed-by: Petr Jelinek <petr.jelinek@2ndquadrant.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Alvaro Herrera <alvherre@alvh.no-ip.org>
This commit is contained in:
Peter Eisentraut
2018-04-07 11:17:56 -04:00
parent b508a56f2f
commit 5dfd1e5a66
15 changed files with 414 additions and 13 deletions
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7
src/backend/access/heap/heapam.c
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@ -9260,6 +9260,13 @@ heap_redo(XLogReaderState *record)
case XLOG_HEAP_UPDATE:
heap_xlog_update(record, false);
break;
case XLOG_HEAP_TRUNCATE:
/*
* TRUNCATE is a no-op because the actions are already logged as
* SMGR WAL records. TRUNCATE WAL record only exists for logical
* decoding.
*/
break;
case XLOG_HEAP_HOT_UPDATE:
heap_xlog_update(record, true);
break;