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Nested transactions. There is still much left to do, especially on the

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performance front, but with feature freeze upon us I think it's time to
drive a stake in the ground and say that this will be in 7.5.

Alvaro Herrera, with some help from Tom Lane.
This commit is contained in:
Tom Lane
2004-07-01 00:52:04 +00:00
parent 4c9aa572fa
commit 573a71a5da
74 changed files with 4516 additions and 1144 deletions
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34
src/backend/utils/time/tqual.c
View File

@@ -16,13 +16,14 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/time/tqual.c,v 1.72 2003/11/29 19:52:04 pgsql Exp $
* $PostgreSQL: pgsql/src/backend/utils/time/tqual.c,v 1.73 2004/07/01 00:51:33 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/subtrans.h"
#include "storage/sinval.h"
#include "utils/tqual.h"
@@ -115,6 +116,10 @@ HeapTupleSatisfiesItself(HeapTupleHeader tuple)
if (tuple->t_infomask & HEAP_XMAX_INVALID) /* xid invalid */
return true;
/* deleting subtransaction aborted */
if (TransactionIdDidAbort(HeapTupleHeaderGetXmax(tuple)))
return true;
Assert(TransactionIdIsCurrentTransactionId(HeapTupleHeaderGetXmax(tuple)));
if (tuple->t_infomask & HEAP_MARKED_FOR_UPDATE)
@@ -261,6 +266,10 @@ HeapTupleSatisfiesNow(HeapTupleHeader tuple)
if (tuple->t_infomask & HEAP_XMAX_INVALID) /* xid invalid */
return true;
/* deleting subtransaction aborted */
if (TransactionIdDidAbort(HeapTupleHeaderGetXmax(tuple)))
return true;
Assert(TransactionIdIsCurrentTransactionId(HeapTupleHeaderGetXmax(tuple)));
if (tuple->t_infomask & HEAP_MARKED_FOR_UPDATE)
@@ -441,6 +450,10 @@ HeapTupleSatisfiesUpdate(HeapTupleHeader tuple, CommandId curcid)
if (tuple->t_infomask & HEAP_XMAX_INVALID) /* xid invalid */
return HeapTupleMayBeUpdated;
/* deleting subtransaction aborted */
if (TransactionIdDidAbort(HeapTupleHeaderGetXmax(tuple)))
return HeapTupleMayBeUpdated;
Assert(TransactionIdIsCurrentTransactionId(HeapTupleHeaderGetXmax(tuple)));
if (tuple->t_infomask & HEAP_MARKED_FOR_UPDATE)
@@ -575,6 +588,10 @@ HeapTupleSatisfiesDirty(HeapTupleHeader tuple)
if (tuple->t_infomask & HEAP_XMAX_INVALID) /* xid invalid */
return true;
/* deleting subtransaction aborted */
if (TransactionIdDidAbort(HeapTupleHeaderGetXmax(tuple)))
return true;
Assert(TransactionIdIsCurrentTransactionId(HeapTupleHeaderGetXmax(tuple)));
if (tuple->t_infomask & HEAP_MARKED_FOR_UPDATE)
@@ -712,6 +729,11 @@ HeapTupleSatisfiesSnapshot(HeapTupleHeader tuple, Snapshot snapshot)
if (tuple->t_infomask & HEAP_XMAX_INVALID) /* xid invalid */
return true;
/* deleting subtransaction aborted */
/* FIXME -- is this correct w.r.t. the cmax of the tuple? */
if (TransactionIdDidAbort(HeapTupleHeaderGetXmax(tuple)))
return true;
Assert(TransactionIdIsCurrentTransactionId(HeapTupleHeaderGetXmax(tuple)));
if (tuple->t_infomask & HEAP_MARKED_FOR_UPDATE)
@@ -747,7 +769,7 @@ HeapTupleSatisfiesSnapshot(HeapTupleHeader tuple, Snapshot snapshot)
for (i = 0; i < snapshot->xcnt; i++)
{
if (TransactionIdEquals(HeapTupleHeaderGetXmin(tuple),
if (SubTransXidsHaveCommonAncestor(HeapTupleHeaderGetXmin(tuple),
snapshot->xip[i]))
return false;
}
@@ -792,7 +814,7 @@ HeapTupleSatisfiesSnapshot(HeapTupleHeader tuple, Snapshot snapshot)
return true;
for (i = 0; i < snapshot->xcnt; i++)
{
if (TransactionIdEquals(HeapTupleHeaderGetXmax(tuple), snapshot->xip[i]))
if (SubTransXidsHaveCommonAncestor(HeapTupleHeaderGetXmax(tuple), snapshot->xip[i]))
return true;
}
}
@@ -868,8 +890,8 @@ HeapTupleSatisfiesVacuum(HeapTupleHeader tuple, TransactionId OldestXmin)
{
if (tuple->t_infomask & HEAP_XMAX_INVALID) /* xid invalid */
return HEAPTUPLE_INSERT_IN_PROGRESS;
Assert(HeapTupleHeaderGetXmin(tuple) ==
HeapTupleHeaderGetXmax(tuple));
Assert(SubTransXidsHaveCommonAncestor(HeapTupleHeaderGetXmin(tuple),
HeapTupleHeaderGetXmax(tuple)));
if (tuple->t_infomask & HEAP_MARKED_FOR_UPDATE)
return HEAPTUPLE_INSERT_IN_PROGRESS;
/* inserted and then deleted by same xact */
@@ -943,7 +965,7 @@ HeapTupleSatisfiesVacuum(HeapTupleHeader tuple, TransactionId OldestXmin)
* Deleter committed, but check special cases.
*/
if (TransactionIdEquals(HeapTupleHeaderGetXmin(tuple),
if (SubTransXidsHaveCommonAncestor(HeapTupleHeaderGetXmin(tuple),
HeapTupleHeaderGetXmax(tuple)))
{
/*