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Redefine the lp_flags field of item pointers as having four states, rather

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than two independent bits (one of which was never used in heap pages anyway,
or at least hadn't been in a very long time).  This gives us flexibility to
add the HOT notions of redirected and dead item pointers without requiring
anything so klugy as magic values of lp_off and lp_len.  The state values
are chosen so that for the states currently in use (pre-HOT) there is no
change in the physical representation.
This commit is contained in:
Tom Lane
2007-09-12 22:10:26 +00:00
parent eb0a7735ba
commit 6889303531
31 changed files with 278 additions and 185 deletions
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10
src/backend/access/gin/ginxlog.c
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@ -8,7 +8,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/gin/ginxlog.c,v 1.7 2007/06/04 15:56:28 teodor Exp $
* $PostgreSQL: pgsql/src/backend/access/gin/ginxlog.c,v 1.8 2007/09/12 22:10:25 tgl Exp $
*-------------------------------------------------------------------------
*/
#include "postgres.h"
@ -199,7 +199,7 @@ ginRedoInsert(XLogRecPtr lsn, XLogRecord *record)
itup = (IndexTuple) (XLogRecGetData(record) + sizeof(ginxlogInsert));
if (PageAddItem(page, (Item) itup, IndexTupleSize(itup), data->offset, LP_USED) == InvalidOffsetNumber)
if (PageAddItem(page, (Item) itup, IndexTupleSize(itup), data->offset, false) == InvalidOffsetNumber)
elog(ERROR, "failed to add item to index page in %u/%u/%u",
data->node.spcNode, data->node.dbNode, data->node.relNode);
@ -281,7 +281,7 @@ ginRedoSplit(XLogRecPtr lsn, XLogRecord *record)
for (i = 0; i < data->separator; i++)
{
if (PageAddItem(lpage, (Item) itup, IndexTupleSize(itup), InvalidOffsetNumber, LP_USED) == InvalidOffsetNumber)
if (PageAddItem(lpage, (Item) itup, IndexTupleSize(itup), InvalidOffsetNumber, false) == InvalidOffsetNumber)
elog(ERROR, "failed to add item to index page in %u/%u/%u",
data->node.spcNode, data->node.dbNode, data->node.relNode);
itup = (IndexTuple) (((char *) itup) + MAXALIGN(IndexTupleSize(itup)));
@ -289,7 +289,7 @@ ginRedoSplit(XLogRecPtr lsn, XLogRecord *record)
for (i = data->separator; i < data->nitem; i++)
{
if (PageAddItem(rpage, (Item) itup, IndexTupleSize(itup), InvalidOffsetNumber, LP_USED) == InvalidOffsetNumber)
if (PageAddItem(rpage, (Item) itup, IndexTupleSize(itup), InvalidOffsetNumber, false) == InvalidOffsetNumber)
elog(ERROR, "failed to add item to index page in %u/%u/%u",
data->node.spcNode, data->node.dbNode, data->node.relNode);
itup = (IndexTuple) (((char *) itup) + MAXALIGN(IndexTupleSize(itup)));
@ -375,7 +375,7 @@ ginRedoVacuumPage(XLogRecPtr lsn, XLogRecord *record)
for (i = 0; i < data->nitem; i++)
{
if (PageAddItem(page, (Item) itup, IndexTupleSize(itup), InvalidOffsetNumber, LP_USED) == InvalidOffsetNumber)
if (PageAddItem(page, (Item) itup, IndexTupleSize(itup), InvalidOffsetNumber, false) == InvalidOffsetNumber)
elog(ERROR, "failed to add item to index page in %u/%u/%u",
data->node.spcNode, data->node.dbNode, data->node.relNode);
itup = (IndexTuple) (((char *) itup) + MAXALIGN(IndexTupleSize(itup)));