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This patch wraps all accesses to t_xmin, t_cmin, t_xmax, and t_cmax in

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HeapTupleHeaderData in setter and getter macros called
HeapTupleHeaderGetXmin, HeapTupleHeaderSetXmin etc.

It also introduces a "virtual" field xvac by defining
HeapTupleHeaderGetXvac and HeapTupleHeaderSetXvac.  Xvac is used by
VACUUM, in fact it is stored in t_cmin.

Manfred Koizar
This commit is contained in:
Bruce Momjian
2002-06-15 19:54:24 +00:00
parent 7882179994
commit 3c35face41
14 changed files with 312 additions and 246 deletions
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9
src/backend/access/transam/xlogutils.c
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@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Header: /cvsroot/pgsql/src/backend/access/transam/xlogutils.c,v 1.23 2002/03/31 06:26:29 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/access/transam/xlogutils.c,v 1.24 2002/06/15 19:54:23 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -73,7 +73,8 @@ XLogIsOwnerOfTuple(RelFileNode hnode, ItemPointer iptr,
htup = (HeapTupleHeader) PageGetItem(page, lp);
Assert(PageGetSUI(page) == ThisStartUpID);
if (!TransactionIdEquals(htup->t_xmin, xid) || htup->t_cmin != cid)
if (!TransactionIdEquals(HeapTupleHeaderGetXmin(htup), xid) ||
HeapTupleHeaderGetCmin(htup) != cid)
{
UnlockAndReleaseBuffer(buffer);
return (-1);
@ -137,8 +138,8 @@ XLogIsValidTuple(RelFileNode hnode, ItemPointer iptr)
{
if (htup->t_infomask & HEAP_XMIN_INVALID ||
(htup->t_infomask & HEAP_MOVED_IN &&
TransactionIdDidAbort((TransactionId) htup->t_cmin)) ||
TransactionIdDidAbort(htup->t_xmin))
TransactionIdDidAbort(HeapTupleHeaderGetXvac(htup))) ||
TransactionIdDidAbort(HeapTupleHeaderGetXmin(htup)))
{
UnlockAndReleaseBuffer(buffer);
return (false);