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Derive latestRemovedXid for btree deletes by reading heap pages. The

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WAL record for btree delete contains a list of tids, even when backup
blocks are present. We follow the tids to their heap tuples, taking
care to follow LP_REDIRECT tuples. We ignore LP_DEAD tuples on the
understanding that they will always have xmin/xmax earlier than any
LP_NORMAL tuples referred to by killed index tuples. Iff all tuples
are LP_DEAD we return InvalidTransactionId. The heap relfilenode is
added to the WAL record, requiring API changes to pass down the heap
Relation. XLOG_PAGE_MAGIC updated.
This commit is contained in:
Simon Riggs
2010-03-28 09:27:02 +00:00
parent 59292f28ca
commit a760893dbd
6 changed files with 254 additions and 71 deletions
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18
src/backend/access/nbtree/nbtinsert.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/nbtree/nbtinsert.c,v 1.177 2010/02/26 02:00:34 momjian Exp $
* $PostgreSQL: pgsql/src/backend/access/nbtree/nbtinsert.c,v 1.178 2010/03/28 09:27:01 sriggs Exp $
*
*-------------------------------------------------------------------------
*/
@ -57,7 +57,8 @@ static void _bt_findinsertloc(Relation rel,
OffsetNumber *offsetptr,
int keysz,
ScanKey scankey,
IndexTuple newtup);
IndexTuple newtup,
Relation heapRel);
static void _bt_insertonpg(Relation rel, Buffer buf,
BTStack stack,
IndexTuple itup,
@ -78,7 +79,7 @@ static void _bt_pgaddtup(Relation rel, Page page,
OffsetNumber itup_off, const char *where);
static bool _bt_isequal(TupleDesc itupdesc, Page page, OffsetNumber offnum,
int keysz, ScanKey scankey);
static void _bt_vacuum_one_page(Relation rel, Buffer buffer);
static void _bt_vacuum_one_page(Relation rel, Buffer buffer, Relation heapRel);
/*
@ -175,7 +176,7 @@ top:
if (checkUnique != UNIQUE_CHECK_EXISTING)
{
/* do the insertion */
_bt_findinsertloc(rel, &buf, &offset, natts, itup_scankey, itup);
_bt_findinsertloc(rel, &buf, &offset, natts, itup_scankey, itup, heapRel);
_bt_insertonpg(rel, buf, stack, itup, offset, false);
}
else
@ -491,7 +492,8 @@ _bt_findinsertloc(Relation rel,
OffsetNumber *offsetptr,
int keysz,
ScanKey scankey,
IndexTuple newtup)
IndexTuple newtup,
Relation heapRel)
{
Buffer buf = *bufptr;
Page page = BufferGetPage(buf);
@ -556,7 +558,7 @@ _bt_findinsertloc(Relation rel,
*/
if (P_ISLEAF(lpageop) && P_HAS_GARBAGE(lpageop))
{
_bt_vacuum_one_page(rel, buf);
_bt_vacuum_one_page(rel, buf, heapRel);
/*
* remember that we vacuumed this page, because that makes the
@ -1998,7 +2000,7 @@ _bt_isequal(TupleDesc itupdesc, Page page, OffsetNumber offnum,
* super-exclusive "cleanup" lock (see nbtree/README).
*/
static void
_bt_vacuum_one_page(Relation rel, Buffer buffer)
_bt_vacuum_one_page(Relation rel, Buffer buffer, Relation heapRel)
{
OffsetNumber deletable[MaxOffsetNumber];
int ndeletable = 0;
@ -2025,7 +2027,7 @@ _bt_vacuum_one_page(Relation rel, Buffer buffer)
}
if (ndeletable > 0)
_bt_delitems(rel, buffer, deletable, ndeletable, false, 0);
_bt_delitems_delete(rel, buffer, deletable, ndeletable, heapRel);
/*
* Note: if we didn't find any LP_DEAD items, then the page's