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TOAST

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WARNING: This is actually broken - we have self-deadlocks
	         due to concurrent changes in buffer management.
			 Vadim and me are working on it.

Jan
This commit is contained in:
Jan Wieck
2000-07-03 23:10:14 +00:00
parent ef5bea51e1
commit 57d8080a40
43 changed files with 1638 additions and 445 deletions
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38
src/backend/access/heap/heapam.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/heap/heapam.c,v 1.75 2000/07/03 02:54:15 vadim Exp $
* $Header: /cvsroot/pgsql/src/backend/access/heap/heapam.c,v 1.76 2000/07/03 23:09:16 wieck Exp $
*
*
* INTERFACE ROUTINES
@ -1299,6 +1299,17 @@ heap_insert(Relation relation, HeapTuple tup)
tup->t_data->t_infomask &= ~(HEAP_XACT_MASK);
tup->t_data->t_infomask |= HEAP_XMAX_INVALID;
#ifdef TUPLE_TOASTER_ACTIVE
/* ----------
* If the new tuple is too big for storage or contains already
* toasted attributes from some other relation, invoke the toaster.
* ----------
*/
if (HeapTupleHasExtended(tup) ||
(MAXALIGN(tup->t_len) > (MaxTupleSize / 4)))
heap_tuple_toast_attrs(relation, tup, NULL);
#endif
/* Find buffer for this tuple */
buffer = RelationGetBufferForTuple(relation, tup->t_len, InvalidBuffer);
@ -1328,8 +1339,8 @@ heap_insert(Relation relation, HeapTuple tup)
}
#endif
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
WriteBuffer(buffer);
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
if (IsSystemRelationName(RelationGetRelationName(relation)))
RelationMark4RollbackHeapTuple(relation, tup);
@ -1441,6 +1452,16 @@ l1:
tp.t_data->t_infomask &= ~(HEAP_XMAX_COMMITTED |
HEAP_XMAX_INVALID | HEAP_MARKED_FOR_UPDATE);
#ifdef TUPLE_TOASTER_ACTIVE
/* ----------
* If the relation has toastable attributes, we need to delete
* no longer needed items there too.
* ----------
*/
if (HeapTupleHasExtended(&tp))
heap_tuple_toast_attrs(relation, NULL, &(tp));
#endif
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
/* invalidate caches */
@ -1559,6 +1580,19 @@ l2:
oldtup.t_data->t_infomask &= ~(HEAP_XMAX_COMMITTED |
HEAP_XMAX_INVALID | HEAP_MARKED_FOR_UPDATE);
#ifdef TUPLE_TOASTER_ACTIVE
/* ----------
* If this relation is enabled for toasting, let the toaster
* delete not any longer needed entries and create new ones to
* make the new tuple fit again.
* ----------
*/
if (HeapTupleHasExtended(&oldtup) ||
HeapTupleHasExtended(newtup) ||
(MAXALIGN(newtup->t_len) > (MaxTupleSize / 4)))
heap_tuple_toast_attrs(relation, newtup, &oldtup);
#endif
/* record address of new tuple in t_ctid of old one */
oldtup.t_data->t_ctid = newtup->t_self;