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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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8
src/backend/commands/vacuumlazy.c
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@ -31,7 +31,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/vacuumlazy.c,v 1.14 2002/04/02 01:03:05 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/vacuumlazy.c,v 1.15 2002/06/15 19:54:24 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -332,11 +332,11 @@ lazy_scan_heap(Relation onerel, LVRelStats *vacrelstats,
* assumption by momentarily acquiring exclusive lock,
* but for the moment I see no need to.
*/
if (TransactionIdIsNormal(tuple.t_data->t_xmin) &&
TransactionIdPrecedes(tuple.t_data->t_xmin,
if (TransactionIdIsNormal(HeapTupleHeaderGetXmin(tuple.t_data)) &&
TransactionIdPrecedes(HeapTupleHeaderGetXmin(tuple.t_data),
FreezeLimit))
{
tuple.t_data->t_xmin = FrozenTransactionId;
HeapTupleHeaderSetXmin(tuple.t_data, FrozenTransactionId);
/* infomask should be okay already */
Assert(tuple.t_data->t_infomask & HEAP_XMIN_COMMITTED);
pgchanged = true;