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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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16
src/backend/access/rmgrdesc/heapdesc.c
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@ -75,6 +75,19 @@ heap_desc(StringInfo buf, XLogReaderState *record)
xlrec->new_offnum,
xlrec->new_xmax);
}
else if (info == XLOG_HEAP_TRUNCATE)
{
xl_heap_truncate *xlrec = (xl_heap_truncate *) rec;
int i;
if (xlrec->flags & XLH_TRUNCATE_CASCADE)
appendStringInfo(buf, "cascade ");
if (xlrec->flags & XLH_TRUNCATE_RESTART_SEQS)
appendStringInfo(buf, "restart_seqs ");
appendStringInfo(buf, "nrelids %u relids", xlrec->nrelids);
for (i = 0; i < xlrec->nrelids; i++)
appendStringInfo(buf, " %u", xlrec->relids[i]);
}
else if (info == XLOG_HEAP_CONFIRM)
{
xl_heap_confirm *xlrec = (xl_heap_confirm *) rec;
@ -186,6 +199,9 @@ heap_identify(uint8 info)
case XLOG_HEAP_HOT_UPDATE | XLOG_HEAP_INIT_PAGE:
id = "HOT_UPDATE+INIT";
break;
case XLOG_HEAP_TRUNCATE:
id = "TRUNCATE";
break;
case XLOG_HEAP_CONFIRM:
id = "HEAP_CONFIRM";
break;