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Code review for HeapTupleHeader changes. Add version number to page headers

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(overlaying low byte of page size) and add HEAP_HASOID bit to t_infomask,
per earlier discussion.  Simplify scheme for overlaying fields in tuple
header (no need for cmax to live in more than one place).  Don't try to
clear infomask status bits in tqual.c --- not safe to do it there.  Don't
try to force output table of a SELECT INTO to have OIDs, either.  Get rid
of unnecessarily complex three-state scheme for TupleDesc.tdhasoids, which
has already caused one recent failure.  Improve documentation.
This commit is contained in:
Tom Lane
2002-09-02 01:05:06 +00:00
parent fcd34f9f7f
commit c7a165adc6
49 changed files with 513 additions and 561 deletions
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104
src/backend/access/heap/heapam.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/heap/heapam.c,v 1.146 2002/08/29 00:17:02 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/access/heap/heapam.c,v 1.147 2002/09/02 01:05:03 tgl Exp $
*
*
* INTERFACE ROUTINES
@ -1116,6 +1116,10 @@ heap_insert(Relation relation, HeapTuple tup, CommandId cid)
if (relation->rd_rel->relhasoids)
{
#ifdef NOT_USED
/* this is redundant with an Assert in HeapTupleSetOid */
Assert(tup->t_data->t_infomask & HEAP_HASOID);
#endif
/*
* If the object id of this tuple has already been assigned, trust
* the caller. There are a couple of ways this can happen. At
@ -1125,22 +1129,21 @@ heap_insert(Relation relation, HeapTuple tup, CommandId cid)
* to support a persistent object store (objects need to contain
* pointers to one another).
*/
AssertTupleDescHasOid(relation->rd_att);
if (!OidIsValid(HeapTupleGetOid(tup)))
HeapTupleSetOid(tup, newoid());
else
CheckMaxObjectId(HeapTupleGetOid(tup));
}
else
{
/* check there is not space for an OID */
Assert(!(tup->t_data->t_infomask & HEAP_HASOID));
}
tup->t_data->t_infomask &= ~(HEAP_XACT_MASK);
tup->t_data->t_infomask |= HEAP_XMAX_INVALID;
HeapTupleHeaderSetXmin(tup->t_data, GetCurrentTransactionId());
HeapTupleHeaderSetCmin(tup->t_data, cid);
HeapTupleHeaderSetXmaxInvalid(tup->t_data);
/*
* Do *not* set Cmax! This would overwrite Cmin.
*/
/* HeapTupleHeaderSetCmax(tup->t_data, FirstCommandId); */
tup->t_data->t_infomask |= HEAP_XMAX_INVALID;
tup->t_tableOid = relation->rd_id;
#ifdef TUPLE_TOASTER_ACTIVE
@ -1181,13 +1184,7 @@ heap_insert(Relation relation, HeapTuple tup, CommandId cid)
rdata[0].len = SizeOfHeapInsert;
rdata[0].next = &(rdata[1]);
if (relation->rd_rel->relhasoids)
{
AssertTupleDescHasOid(relation->rd_att);
xlhdr.t_oid = HeapTupleGetOid(tup);
}
else
xlhdr.t_oid = InvalidOid;
xlhdr.t_oid = HeapTupleGetOid(tup);
xlhdr.t_natts = tup->t_data->t_natts;
xlhdr.t_hoff = tup->t_data->t_hoff;
xlhdr.mask = tup->t_data->t_infomask;
@ -1234,10 +1231,6 @@ heap_insert(Relation relation, HeapTuple tup, CommandId cid)
*/
CacheInvalidateHeapTuple(relation, tup);
if (!relation->rd_rel->relhasoids)
return InvalidOid;
AssertTupleDescHasOid(relation->rd_att);
return HeapTupleGetOid(tup);
}
@ -1343,7 +1336,9 @@ l1:
/* store transaction information of xact deleting the tuple */
tp.t_data->t_infomask &= ~(HEAP_XMAX_COMMITTED |
HEAP_XMAX_INVALID | HEAP_MARKED_FOR_UPDATE);
HEAP_XMAX_INVALID |
HEAP_MARKED_FOR_UPDATE |
HEAP_MOVED);
HeapTupleHeaderSetXmax(tp.t_data, GetCurrentTransactionId());
HeapTupleHeaderSetCmax(tp.t_data, cid);
/* Make sure there is no forward chain link in t_ctid */
@ -1543,14 +1538,22 @@ l2:
/* Fill in OID and transaction status data for newtup */
if (relation->rd_rel->relhasoids)
{
AssertTupleDescHasOid(relation->rd_att);
#ifdef NOT_USED
/* this is redundant with an Assert in HeapTupleSetOid */
Assert(newtup->t_data->t_infomask & HEAP_HASOID);
#endif
HeapTupleSetOid(newtup, HeapTupleGetOid(&oldtup));
}
else
{
/* check there is not space for an OID */
Assert(!(newtup->t_data->t_infomask & HEAP_HASOID));
}
newtup->t_data->t_infomask &= ~(HEAP_XACT_MASK);
newtup->t_data->t_infomask |= (HEAP_XMAX_INVALID | HEAP_UPDATED);
HeapTupleHeaderSetXmin(newtup->t_data, GetCurrentTransactionId());
HeapTupleHeaderSetCmin(newtup->t_data, cid);
HeapTupleHeaderSetXmaxInvalid(newtup->t_data);
/*
* If the toaster needs to be activated, OR if the new tuple will not
@ -1586,7 +1589,8 @@ l2:
oldtup.t_data->t_infomask &= ~(HEAP_XMAX_COMMITTED |
HEAP_XMAX_INVALID |
HEAP_MARKED_FOR_UPDATE);
HEAP_MARKED_FOR_UPDATE |
HEAP_MOVED);
oldtup.t_data->t_infomask |= HEAP_XMAX_UNLOGGED;
HeapTupleHeaderSetXmax(oldtup.t_data, GetCurrentTransactionId());
HeapTupleHeaderSetCmax(oldtup.t_data, cid);
@ -1677,7 +1681,8 @@ l2:
{
oldtup.t_data->t_infomask &= ~(HEAP_XMAX_COMMITTED |
HEAP_XMAX_INVALID |
HEAP_MARKED_FOR_UPDATE);
HEAP_MARKED_FOR_UPDATE |
HEAP_MOVED);
HeapTupleHeaderSetXmax(oldtup.t_data, GetCurrentTransactionId());
HeapTupleHeaderSetCmax(oldtup.t_data, cid);
}
@ -1852,7 +1857,9 @@ l3:
((PageHeader) BufferGetPage(*buffer))->pd_sui = ThisStartUpID;
/* store transaction information of xact marking the tuple */
tuple->t_data->t_infomask &= ~(HEAP_XMAX_COMMITTED | HEAP_XMAX_INVALID);
tuple->t_data->t_infomask &= ~(HEAP_XMAX_COMMITTED |
HEAP_XMAX_INVALID |
HEAP_MOVED);
tuple->t_data->t_infomask |= HEAP_MARKED_FOR_UPDATE;
HeapTupleHeaderSetXmax(tuple->t_data, GetCurrentTransactionId());
HeapTupleHeaderSetCmax(tuple->t_data, cid);
@ -2032,13 +2039,7 @@ log_heap_update(Relation reln, Buffer oldbuf, ItemPointerData from,
rdata[1].len = 0;
rdata[1].next = &(rdata[2]);
if (reln->rd_rel->relhasoids)
{
AssertTupleDescHasOid(reln->rd_att);
xlhdr.hdr.t_oid = HeapTupleGetOid(newtup);
}
else
xlhdr.hdr.t_oid = InvalidOid;
xlhdr.hdr.t_oid = HeapTupleGetOid(newtup);
xlhdr.hdr.t_natts = newtup->t_data->t_natts;
xlhdr.hdr.t_hoff = newtup->t_data->t_hoff;
xlhdr.hdr.mask = newtup->t_data->t_infomask;
@ -2197,12 +2198,10 @@ heap_xlog_delete(bool redo, XLogRecPtr lsn, XLogRecord *record)
if (redo)
{
/*
* On redo from WAL we cannot rely on a tqual-routine
* to have reset HEAP_MOVED.
*/
htup->t_infomask &= ~(HEAP_MOVED | HEAP_XMAX_COMMITTED |
HEAP_XMAX_INVALID | HEAP_MARKED_FOR_UPDATE);
htup->t_infomask &= ~(HEAP_XMAX_COMMITTED |
HEAP_XMAX_INVALID |
HEAP_MARKED_FOR_UPDATE |
HEAP_MOVED);
HeapTupleHeaderSetXmax(htup, record->xl_xid);
HeapTupleHeaderSetCmax(htup, FirstCommandId);
/* Make sure there is no forward chain link in t_ctid */
@ -2284,14 +2283,9 @@ heap_xlog_insert(bool redo, XLogRecPtr lsn, XLogRecord *record)
htup->t_infomask = HEAP_XMAX_INVALID | xlhdr.mask;
HeapTupleHeaderSetXmin(htup, record->xl_xid);
HeapTupleHeaderSetCmin(htup, FirstCommandId);
HeapTupleHeaderSetXmaxInvalid(htup);
HeapTupleHeaderSetCmax(htup, FirstCommandId);
htup->t_ctid = xlrec->target.tid;
if (reln->rd_rel->relhasoids)
{
AssertTupleDescHasOid(reln->rd_att);
HeapTupleHeaderSetOid(htup, xlhdr.t_oid);
}
offnum = PageAddItem(page, (Item) htup, newlen, offnum,
LP_USED | OverwritePageMode);
@ -2372,8 +2366,9 @@ heap_xlog_update(bool redo, XLogRecPtr lsn, XLogRecord *record, bool move)
{
if (move)
{
htup->t_infomask &=
~(HEAP_XMIN_COMMITTED | HEAP_XMIN_INVALID | HEAP_MOVED_IN);
htup->t_infomask &= ~(HEAP_XMIN_COMMITTED |
HEAP_XMIN_INVALID |
HEAP_MOVED_IN);
htup->t_infomask |= HEAP_MOVED_OFF;
HeapTupleHeaderSetXvac(htup, record->xl_xid);
/* Make sure there is no forward chain link in t_ctid */
@ -2381,12 +2376,10 @@ heap_xlog_update(bool redo, XLogRecPtr lsn, XLogRecord *record, bool move)
}
else
{
/*
* On redo from WAL we cannot rely on a tqual-routine
* to have reset HEAP_MOVED.
*/
htup->t_infomask &= ~(HEAP_MOVED | HEAP_XMAX_COMMITTED |
HEAP_XMAX_INVALID | HEAP_MARKED_FOR_UPDATE);
htup->t_infomask &= ~(HEAP_XMAX_COMMITTED |
HEAP_XMAX_INVALID |
HEAP_MARKED_FOR_UPDATE |
HEAP_MOVED);
HeapTupleHeaderSetXmax(htup, record->xl_xid);
HeapTupleHeaderSetCmax(htup, FirstCommandId);
/* Set forward chain link in t_ctid */
@ -2466,10 +2459,8 @@ newsame:;
htup->t_natts = xlhdr.t_natts;
htup->t_hoff = xlhdr.t_hoff;
if (reln->rd_rel->relhasoids)
{
AssertTupleDescHasOid(reln->rd_att);
HeapTupleHeaderSetOid(htup, xlhdr.t_oid);
}
if (move)
{
TransactionId xid[2]; /* xmax, xmin */
@ -2479,7 +2470,8 @@ newsame:;
(char *) xlrec + hsize, 2 * sizeof(TransactionId));
htup->t_infomask = xlhdr.mask;
htup->t_infomask &= ~(HEAP_XMIN_COMMITTED |
HEAP_XMIN_INVALID | HEAP_MOVED_OFF);
HEAP_XMIN_INVALID |
HEAP_MOVED_OFF);
htup->t_infomask |= HEAP_MOVED_IN;
HeapTupleHeaderSetXmin(htup, xid[1]);
HeapTupleHeaderSetXmax(htup, xid[0]);
@ -2490,8 +2482,6 @@ newsame:;
htup->t_infomask = HEAP_XMAX_INVALID | xlhdr.mask;
HeapTupleHeaderSetXmin(htup, record->xl_xid);
HeapTupleHeaderSetCmin(htup, FirstCommandId);
HeapTupleHeaderSetXmaxInvalid(htup);
HeapTupleHeaderSetCmax(htup, FirstCommandId);
}
/* Make sure there is no forward chain link in t_ctid */
htup->t_ctid = xlrec->newtid;