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Commit 7326e78

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Ensure that all TransactionId comparisons are encapsulated in macros
(TransactionIdPrecedes, TransactionIdFollows, etc). First step on the way to transaction ID wrap solution ...
1 parent 29ec29f commit 7326e78

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17 files changed

+139
-100
lines changed

17 files changed

+139
-100
lines changed

‎src/backend/access/common/heaptuple.c

Lines changed: 5 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -9,7 +9,7 @@
99
*
1010
*
1111
* IDENTIFICATION
12-
* $Header: /cvsroot/pgsql/src/backend/access/common/heaptuple.c,v 1.72 2001/06/12 05:55:49 tgl Exp $
12+
* $Header: /cvsroot/pgsql/src/backend/access/common/heaptuple.c,v 1.73 2001/08/23 23:06:37 tgl Exp $
1313
*
1414
* NOTES
1515
* The old interface functions have been converted to macros
@@ -441,20 +441,16 @@ heap_getsysattr(HeapTuple tup, int attnum, bool *isnull)
441441
result = ObjectIdGetDatum(tup->t_data->t_oid);
442442
break;
443443
case MinTransactionIdAttributeNumber:
444-
/* XXX should have a TransactionIdGetDatum macro */
445-
result = (Datum) (tup->t_data->t_xmin);
444+
result = TransactionIdGetDatum(tup->t_data->t_xmin);
446445
break;
447446
case MinCommandIdAttributeNumber:
448-
/* XXX should have a CommandIdGetDatum macro */
449-
result = (Datum) (tup->t_data->t_cmin);
447+
result = CommandIdGetDatum(tup->t_data->t_cmin);
450448
break;
451449
case MaxTransactionIdAttributeNumber:
452-
/* XXX should have a TransactionIdGetDatum macro */
453-
result = (Datum) (tup->t_data->t_xmax);
450+
result = TransactionIdGetDatum(tup->t_data->t_xmax);
454451
break;
455452
case MaxCommandIdAttributeNumber:
456-
/* XXX should have a CommandIdGetDatum macro */
457-
result = (Datum) (tup->t_data->t_cmax);
453+
result = CommandIdGetDatum(tup->t_data->t_cmax);
458454
break;
459455
case TableOidAttributeNumber:
460456
result = ObjectIdGetDatum(tup->t_tableOid);

‎src/backend/access/heap/heapam.c

Lines changed: 9 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $Header: /cvsroot/pgsql/src/backend/access/heap/heapam.c,v 1.124 2001/08/10 18:57:32 tgl Exp $
11+
* $Header: /cvsroot/pgsql/src/backend/access/heap/heapam.c,v 1.125 2001/08/23 23:06:37 tgl Exp $
1212
*
1313
*
1414
* INTERFACE ROUTINES
@@ -1206,7 +1206,7 @@ heap_delete(Relation relation, ItemPointer tid, ItemPointer ctid)
12061206
* update then some other xaction could update this tuple before
12071207
* we got to this point.
12081208
*/
1209-
if (tp.t_data->t_xmax != xwait)
1209+
if (!TransactionIdEquals(tp.t_data->t_xmax, xwait))
12101210
goto l1;
12111211
if (!(tp.t_data->t_infomask & HEAP_XMAX_COMMITTED))
12121212
{
@@ -1398,7 +1398,7 @@ heap_update(Relation relation, ItemPointer otid, HeapTuple newtup,
13981398
* update then some other xaction could update this tuple before
13991399
* we got to this point.
14001400
*/
1401-
if (oldtup.t_data->t_xmax != xwait)
1401+
if (!TransactionIdEquals(oldtup.t_data->t_xmax, xwait))
14021402
goto l2;
14031403
if (!(oldtup.t_data->t_infomask & HEAP_XMAX_COMMITTED))
14041404
{
@@ -1694,7 +1694,7 @@ heap_mark4update(Relation relation, HeapTuple tuple, Buffer *buffer)
16941694
* update then some other xaction could update this tuple before
16951695
* we got to this point.
16961696
*/
1697-
if (tuple->t_data->t_xmax != xwait)
1697+
if (!TransactionIdEquals(tuple->t_data->t_xmax, xwait))
16981698
goto l3;
16991699
if (!(tuple->t_data->t_infomask & HEAP_XMAX_COMMITTED))
17001700
{
@@ -2123,7 +2123,8 @@ heap_xlog_insert(bool redo, XLogRecPtr lsn, XLogRecord *record)
21232123
htup->t_hoff = xlhdr.t_hoff;
21242124
htup->t_xmin = record->xl_xid;
21252125
htup->t_cmin = FirstCommandId;
2126-
htup->t_xmax = htup->t_cmax = 0;
2126+
htup->t_xmax = InvalidTransactionId;
2127+
htup->t_cmax = FirstCommandId;
21272128
htup->t_infomask = HEAP_XMAX_INVALID | xlhdr.mask;
21282129

21292130
offnum = PageAddItem(page, (Item) htup, newlen, offnum,
@@ -2310,7 +2311,8 @@ newsame:;
23102311
{
23112312
htup->t_xmin = record->xl_xid;
23122313
htup->t_cmin = FirstCommandId;
2313-
htup->t_xmax = htup->t_cmax = 0;
2314+
htup->t_xmax = InvalidTransactionId;
2315+
htup->t_cmax = FirstCommandId;
23142316
htup->t_infomask = HEAP_XMAX_INVALID | xlhdr.mask;
23152317
}
23162318

@@ -2366,7 +2368,7 @@ _heap_unlock_tuple(void *data)
23662368

23672369
htup = (HeapTupleHeader) PageGetItem(page, lp);
23682370

2369-
if (htup->t_xmax != GetCurrentTransactionId() ||
2371+
if (!TransactionIdEquals(htup->t_xmax, GetCurrentTransactionId()) ||
23702372
htup->t_cmax != GetCurrentCommandId())
23712373
elog(STOP, "_heap_unlock_tuple: invalid xmax/cmax in rollback");
23722374
htup->t_infomask &= ~HEAP_XMAX_UNLOGGED;

‎src/backend/access/nbtree/nbtinsert.c

Lines changed: 4 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $Header: /cvsroot/pgsql/src/backend/access/nbtree/nbtinsert.c,v 1.84 2001/07/15 22:48:16 tgl Exp $
11+
* $Header: /cvsroot/pgsql/src/backend/access/nbtree/nbtinsert.c,v 1.85 2001/08/23 23:06:37 tgl Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
@@ -149,8 +149,8 @@ _bt_doinsert(Relation rel, BTItem btitem,
149149
/*
150150
* _bt_check_unique() -- Check for violation of unique index constraint
151151
*
152-
* Returns NullTransactionId if there is no conflict, else an xact ID we
153-
* must wait for to see if it commits a conflicting tuple. If an actual
152+
* Returns InvalidTransactionId if there is no conflict, else an xact ID
153+
* we must wait for to see if it commits a conflicting tuple. If an actual
154154
* conflict is detected, no return --- just elog().
155155
*/
156156
static TransactionId
@@ -275,7 +275,7 @@ _bt_check_unique(Relation rel, BTItem btitem, Relation heapRel,
275275
if (nbuf != InvalidBuffer)
276276
_bt_relbuf(rel, nbuf);
277277

278-
return NullTransactionId;
278+
return InvalidTransactionId;
279279
}
280280

281281
/*----------

‎src/backend/access/transam/transam.c

Lines changed: 9 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $Header: /cvsroot/pgsql/src/backend/access/transam/transam.c,v 1.45 2001/07/12 04:11:13 tgl Exp $
11+
* $Header: /cvsroot/pgsql/src/backend/access/transam/transam.c,v 1.46 2001/08/23 23:06:37 tgl Exp $
1212
*
1313
* NOTES
1414
* This file contains the high level access-method interface to the
@@ -44,7 +44,7 @@ Relation LogRelation = (Relation) NULL;
4444
* Single-item cache for results of TransactionLogTest.
4545
* ----------------
4646
*/
47-
static TransactionId cachedTestXid = NullTransactionId;
47+
static TransactionId cachedTestXid = InvalidTransactionId;
4848
static XidStatus cachedTestXidStatus;
4949

5050
/* ----------------
@@ -333,18 +333,19 @@ InitializeTransactionLog(void)
333333

334334
/*
335335
* if we have a virgin database, we initialize the log relation by
336-
* committing the AmiTransactionId and we initialize the
336+
* committing the BootstrapTransactionId and we initialize the
337337
* variable relation by setting the next available transaction id to
338-
* FirstTransactionId. OID initialization happens as a side
338+
* FirstNormalTransactionId. OID initialization happens as a side
339339
* effect of bootstrapping in varsup.c.
340340
*/
341341
SpinAcquire(OidGenLockId);
342-
if (!TransactionIdDidCommit(AmiTransactionId))
342+
if (!TransactionIdDidCommit(BootstrapTransactionId))
343343
{
344-
TransactionLogUpdate(AmiTransactionId, XID_COMMIT);
344+
TransactionLogUpdate(BootstrapTransactionId, XID_COMMIT);
345345
Assert(!IsUnderPostmaster &&
346-
ShmemVariableCache->nextXid <= FirstTransactionId);
347-
ShmemVariableCache->nextXid = FirstTransactionId;
346+
TransactionIdEquals(ShmemVariableCache->nextXid,
347+
FirstNormalTransactionId));
348+
ShmemVariableCache->nextXid = FirstNormalTransactionId;
348349
}
349350
else if (RecoveryCheckingEnabled())
350351
{

‎src/backend/access/transam/varsup.c

Lines changed: 4 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -6,7 +6,7 @@
66
* Copyright (c) 2000, PostgreSQL Global Development Group
77
*
88
* IDENTIFICATION
9-
* $Header: /cvsroot/pgsql/src/backend/access/transam/varsup.c,v 1.43 2001/08/10 18:57:33 tgl Exp $
9+
* $Header: /cvsroot/pgsql/src/backend/access/transam/varsup.c,v 1.44 2001/08/23 23:06:37 tgl Exp $
1010
*
1111
*-------------------------------------------------------------------------
1212
*/
@@ -41,15 +41,15 @@ GetNewTransactionId(TransactionId *xid)
4141
*/
4242
if (AMI_OVERRIDE)
4343
{
44-
*xid = AmiTransactionId;
44+
*xid = BootstrapTransactionId;
4545
return;
4646
}
4747

4848
SpinAcquire(XidGenLockId);
4949

5050
*xid = ShmemVariableCache->nextXid;
5151

52-
(ShmemVariableCache->nextXid)++;
52+
TransactionIdAdvance(ShmemVariableCache->nextXid);
5353

5454
/*
5555
* Must set MyProc->xid before releasing XidGenLock. This ensures that
@@ -89,7 +89,7 @@ ReadNewTransactionId(TransactionId *xid)
8989
*/
9090
if (AMI_OVERRIDE)
9191
{
92-
*xid = AmiTransactionId;
92+
*xid = BootstrapTransactionId;
9393
return;
9494
}
9595

‎src/backend/access/transam/xid.c

Lines changed: 3 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -6,7 +6,7 @@
66
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
77
* Portions Copyright (c) 1994, Regents of the University of California
88
*
9-
* $Id: xid.c,v 1.31 2001/07/12 04:11:13 tgl Exp $
9+
* $Id: xid.c,v 1.32 2001/08/23 23:06:37 tgl Exp $
1010
*
1111
* OLD COMMENTS
1212
* XXX WARNING
@@ -23,11 +23,8 @@
2323

2424
#include "access/xact.h"
2525

26-
/*
27-
* TransactionId is typedef'd as uint32, so...
28-
*/
29-
#define PG_GETARG_TRANSACTIONID(n) PG_GETARG_UINT32(n)
30-
#define PG_RETURN_TRANSACTIONID(x) PG_RETURN_UINT32(x)
26+
#define PG_GETARG_TRANSACTIONID(n) DatumGetTransactionId(PG_GETARG_DATUM(n))
27+
#define PG_RETURN_TRANSACTIONID(x) return TransactionIdGetDatum(x)
3128

3229

3330
Datum
@@ -42,7 +39,6 @@ Datum
4239
xidout(PG_FUNCTION_ARGS)
4340
{
4441
TransactionId transactionId = PG_GETARG_TRANSACTIONID(0);
45-
4642
/* maximum 32 bit unsigned integer representation takes 10 chars */
4743
char *representation = palloc(11);
4844

‎src/backend/access/transam/xlog.c

Lines changed: 15 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
88
* Portions Copyright (c) 1994, Regents of the University of California
99
*
10-
* $Header: /cvsroot/pgsql/src/backend/access/transam/xlog.c,v 1.73 2001/08/10 18:57:33 tgl Exp $
10+
* $Header: /cvsroot/pgsql/src/backend/access/transam/xlog.c,v 1.74 2001/08/23 23:06:37 tgl Exp $
1111
*
1212
*-------------------------------------------------------------------------
1313
*/
@@ -2349,7 +2349,7 @@ BootStrapXLOG(void)
23492349
checkPoint.redo.xrecoff = SizeOfXLogPHD;
23502350
checkPoint.undo = checkPoint.redo;
23512351
checkPoint.ThisStartUpID = 0;
2352-
checkPoint.nextXid = FirstTransactionId;
2352+
checkPoint.nextXid = FirstNormalTransactionId;
23532353
checkPoint.nextOid = BootstrapObjectIdData;
23542354
checkPoint.time = time(NULL);
23552355

@@ -2508,7 +2508,7 @@ StartupXLOG(void)
25082508
wasShutdown ? "TRUE" : "FALSE");
25092509
elog(LOG, "next transaction id: %u; next oid: %u",
25102510
checkPoint.nextXid, checkPoint.nextOid);
2511-
if (checkPoint.nextXid < FirstTransactionId)
2511+
if (!TransactionIdIsNormal(checkPoint.nextXid))
25122512
elog(STOP, "invalid next transaction id");
25132513

25142514
ShmemVariableCache->nextXid = checkPoint.nextXid;
@@ -2550,8 +2550,10 @@ StartupXLOG(void)
25502550
if (XLByteLT(checkPoint.redo, RecPtr))
25512551
record = ReadRecord(&(checkPoint.redo), STOP, buffer);
25522552
else
2553-
/* read past CheckPoint record */
2553+
{
2554+
/* read past CheckPoint record */
25542555
record = ReadRecord(NULL, LOG, buffer);
2556+
}
25552557

25562558
if (record != NULL)
25572559
{
@@ -2560,8 +2562,13 @@ StartupXLOG(void)
25602562
ReadRecPtr.xlogid, ReadRecPtr.xrecoff);
25612563
do
25622564
{
2563-
if (record->xl_xid >= ShmemVariableCache->nextXid)
2564-
ShmemVariableCache->nextXid = record->xl_xid + 1;
2565+
/* nextXid must be beyond record's xid */
2566+
if (TransactionIdFollowsOrEquals(record->xl_xid,
2567+
ShmemVariableCache->nextXid))
2568+
{
2569+
ShmemVariableCache->nextXid = record->xl_xid;
2570+
TransactionIdAdvance(ShmemVariableCache->nextXid);
2571+
}
25652572
if (XLOG_DEBUG)
25662573
{
25672574
char buf[8192];
@@ -3101,7 +3108,8 @@ xlog_redo(XLogRecPtr lsn, XLogRecord *record)
31013108

31023109
memcpy(&checkPoint, XLogRecGetData(record), sizeof(CheckPoint));
31033110
/* In an ONLINE checkpoint, treat the counters like NEXTOID */
3104-
if (ShmemVariableCache->nextXid < checkPoint.nextXid)
3111+
if (TransactionIdPrecedes(ShmemVariableCache->nextXid,
3112+
checkPoint.nextXid))
31053113
ShmemVariableCache->nextXid = checkPoint.nextXid;
31063114
if (ShmemVariableCache->nextOid < checkPoint.nextOid)
31073115
{

‎src/backend/access/transam/xlogutils.c

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -6,7 +6,7 @@
66
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
77
* Portions Copyright (c) 1994, Regents of the University of California
88
*
9-
* $Header: /cvsroot/pgsql/src/backend/access/transam/xlogutils.c,v 1.16 2001/06/29 21:08:24 tgl Exp $
9+
* $Header: /cvsroot/pgsql/src/backend/access/transam/xlogutils.c,v 1.17 2001/08/23 23:06:37 tgl Exp $
1010
*
1111
*-------------------------------------------------------------------------
1212
*/
@@ -76,7 +76,7 @@ XLogIsOwnerOfTuple(RelFileNode hnode, ItemPointer iptr,
7676
htup = (HeapTupleHeader) PageGetItem(page, lp);
7777

7878
Assert(PageGetSUI(page) == ThisStartUpID);
79-
if (htup->t_xmin != xid || htup->t_cmin != cid)
79+
if (!TransactionIdEquals(htup->t_xmin, xid) || htup->t_cmin != cid)
8080
{
8181
UnlockAndReleaseBuffer(buffer);
8282
return (-1);

‎src/backend/commands/trigger.c

Lines changed: 5 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
* Portions Copyright (c) 1994, Regents of the University of California
88
*
99
* IDENTIFICATION
10-
* $Header: /cvsroot/pgsql/src/backend/commands/trigger.c,v 1.95 2001/08/10 18:57:34 tgl Exp $
10+
* $Header: /cvsroot/pgsql/src/backend/commands/trigger.c,v 1.96 2001/08/23 23:06:37 tgl Exp $
1111
*
1212
*-------------------------------------------------------------------------
1313
*/
@@ -2078,7 +2078,8 @@ DeferredTriggerSaveEvent(ResultRelInfo *relinfo, int event,
20782078
* foreign referenced key value that's changing now has been
20792079
* updated once before in this transaction.
20802080
*/
2081-
if (oldtup->t_data->t_xmin != GetCurrentTransactionId())
2081+
if (!TransactionIdEquals(oldtup->t_data->t_xmin,
2082+
GetCurrentTransactionId()))
20822083
prev_event = NULL;
20832084
else
20842085
prev_event =
@@ -2212,7 +2213,8 @@ DeferredTriggerSaveEvent(ResultRelInfo *relinfo, int event,
22122213
* possibly referenced key value has changed in this
22132214
* transaction.
22142215
*/
2215-
if (oldtup->t_data->t_xmin != GetCurrentTransactionId())
2216+
if (!TransactionIdEquals(oldtup->t_data->t_xmin,
2217+
GetCurrentTransactionId()))
22162218
break;
22172219

22182220
/*

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