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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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35
src/backend/replication/logical/reorderbuffer.c
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@ -415,6 +415,7 @@ ReorderBufferReturnChange(ReorderBuffer *rb, ReorderBufferChange *change)
case REORDER_BUFFER_CHANGE_INTERNAL_SPEC_CONFIRM:
case REORDER_BUFFER_CHANGE_INTERNAL_COMMAND_ID:
case REORDER_BUFFER_CHANGE_INTERNAL_TUPLECID:
case REORDER_BUFFER_CHANGE_TRUNCATE:
break;
}
@ -1491,6 +1492,38 @@ ReorderBufferCommit(ReorderBuffer *rb, TransactionId xid,
specinsert = change;
break;
case REORDER_BUFFER_CHANGE_TRUNCATE:
{
int i;
int nrelids = change->data.truncate.nrelids;
int nrelations = 0;
Relation *relations;
relations = palloc0(nrelids * sizeof(Relation));
for (i = 0; i < nrelids; i++)
{
Oid relid = change->data.truncate.relids[i];
Relation relation;
relation = RelationIdGetRelation(relid);
if (relation == NULL)
elog(ERROR, "could not open relation with OID %u", relid);
if (!RelationIsLogicallyLogged(relation))
continue;
relations[nrelations++] = relation;
}
rb->apply_truncate(rb, txn, nrelations, relations, change);
for (i = 0; i < nrelations; i++)
RelationClose(relations[i]);
break;
}
case REORDER_BUFFER_CHANGE_MESSAGE:
rb->message(rb, txn, change->lsn, true,
change->data.msg.prefix,
@ -2255,6 +2288,7 @@ ReorderBufferSerializeChange(ReorderBuffer *rb, ReorderBufferTXN *txn,
}
break;
}
case REORDER_BUFFER_CHANGE_TRUNCATE:
case REORDER_BUFFER_CHANGE_INTERNAL_SPEC_CONFIRM:
case REORDER_BUFFER_CHANGE_INTERNAL_COMMAND_ID:
case REORDER_BUFFER_CHANGE_INTERNAL_TUPLECID:
@ -2534,6 +2568,7 @@ ReorderBufferRestoreChange(ReorderBuffer *rb, ReorderBufferTXN *txn,
break;
}
/* the base struct contains all the data, easy peasy */
case REORDER_BUFFER_CHANGE_TRUNCATE:
case REORDER_BUFFER_CHANGE_INTERNAL_SPEC_CONFIRM:
case REORDER_BUFFER_CHANGE_INTERNAL_COMMAND_ID:
case REORDER_BUFFER_CHANGE_INTERNAL_TUPLECID: