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Jan WieckJan Wieck
Jan Wieck
authored and
Jan Wieck
committed
Added global variable to have RI triggers override
time qualification of HeapTupleSatisfiesSnapshot() Jan
1 parent d31ff14 commit 62c42a0

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4 files changed

+30
-3
lines changed

4 files changed

+30
-3
lines changed

‎src/backend/commands/trigger.c

Lines changed: 8 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -24,6 +24,7 @@
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#include "utils/builtins.h"
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#include "utils/inval.h"
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#include "utils/syscache.h"
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#include "utils/tqual.h"
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DLLIMPORT TriggerData *CurrentTriggerData = NULL;
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@@ -1151,6 +1152,13 @@ deferredTriggerExecute(DeferredTriggerEvent event, int itemno)
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if (rettuple != NULL && rettuple != &oldtuple && rettuple != &newtuple)
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pfree(rettuple);
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1155+
/* ----------
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* Might have been a referential integrity constraint trigger.
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* Reset the snapshot overriding flag.
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* ----------
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*/
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ReferentialIntegritySnapshotOverride = false;
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/* ----------
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* Release buffers and close the relation
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* ----------

‎src/backend/utils/adt/ri_triggers.c

Lines changed: 10 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -6,7 +6,7 @@
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*
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* 1999 Jan Wieck
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*
9-
* $Header: /cvsroot/pgsql/src/backend/utils/adt/ri_triggers.c,v 1.9 1999/12/08 20:41:22 wieck Exp $
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/ri_triggers.c,v 1.10 1999/12/10 12:34:13 wieck Exp $
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*
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* ----------
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*/
@@ -163,6 +163,7 @@ RI_FKey_check (FmgrInfo *proinfo)
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trigdata = CurrentTriggerData;
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CurrentTriggerData = NULL;
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ReferentialIntegritySnapshotOverride = true;
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/* ----------
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* Check that this is a valid trigger call on the right time and event.
@@ -489,6 +490,7 @@ RI_FKey_cascade_del (FmgrInfo *proinfo)
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trigdata = CurrentTriggerData;
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CurrentTriggerData = NULL;
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ReferentialIntegritySnapshotOverride = true;
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/* ----------
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* Check that this is a valid trigger call on the right time and event.
@@ -686,6 +688,7 @@ RI_FKey_cascade_upd (FmgrInfo *proinfo)
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trigdata = CurrentTriggerData;
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CurrentTriggerData = NULL;
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ReferentialIntegritySnapshotOverride = true;
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/* ----------
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* Check that this is a valid trigger call on the right time and event.
@@ -911,6 +914,7 @@ RI_FKey_restrict_del (FmgrInfo *proinfo)
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trigdata = CurrentTriggerData;
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CurrentTriggerData = NULL;
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ReferentialIntegritySnapshotOverride = true;
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/* ----------
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* Check that this is a valid trigger call on the right time and event.
@@ -1118,6 +1122,7 @@ RI_FKey_restrict_upd (FmgrInfo *proinfo)
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trigdata = CurrentTriggerData;
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CurrentTriggerData = NULL;
1125+
ReferentialIntegritySnapshotOverride = true;
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/* ----------
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* Check that this is a valid trigger call on the right time and event.
@@ -1333,6 +1338,7 @@ RI_FKey_setnull_del (FmgrInfo *proinfo)
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trigdata = CurrentTriggerData;
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CurrentTriggerData = NULL;
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ReferentialIntegritySnapshotOverride = true;
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/* ----------
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* Check that this is a valid trigger call on the right time and event.
@@ -1540,6 +1546,7 @@ RI_FKey_setnull_upd (FmgrInfo *proinfo)
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trigdata = CurrentTriggerData;
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CurrentTriggerData = NULL;
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ReferentialIntegritySnapshotOverride = true;
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/* ----------
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* Check that this is a valid trigger call on the right time and event.
@@ -1758,6 +1765,7 @@ RI_FKey_setdefault_del (FmgrInfo *proinfo)
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trigdata = CurrentTriggerData;
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CurrentTriggerData = NULL;
1768+
ReferentialIntegritySnapshotOverride = true;
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/* ----------
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* Check that this is a valid trigger call on the right time and event.
@@ -2005,6 +2013,7 @@ RI_FKey_setdefault_upd (FmgrInfo *proinfo)
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20062014
trigdata = CurrentTriggerData;
20072015
CurrentTriggerData = NULL;
2016+
ReferentialIntegritySnapshotOverride = true;
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20092018
/* ----------
20102019
* Check that this is a valid trigger call on the right time and event.

‎src/backend/utils/time/tqual.c

Lines changed: 9 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
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*
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*
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* IDENTIFICATION
10-
* $Header: /cvsroot/pgsql/src/backend/utils/time/tqual.c,v 1.32 1999/10/06 21:58:11 vadim Exp $
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* $Header: /cvsroot/pgsql/src/backend/utils/time/tqual.c,v 1.33 1999/12/10 12:34:14 wieck Exp $
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*
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*-------------------------------------------------------------------------
1313
*/
@@ -24,6 +24,8 @@ Snapshot SnapshotDirty = &SnapshotDirtyData;
2424
Snapshot QuerySnapshot = NULL;
2525
Snapshot SerializableSnapshot = NULL;
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27+
bool ReferentialIntegritySnapshotOverride = false;
28+
2729
/*
2830
* XXX Transaction system override hacks start here
2931
*/
@@ -493,6 +495,9 @@ HeapTupleSatisfiesSnapshot(HeapTupleHeader tuple, Snapshot snapshot)
493495
if (AMI_OVERRIDE)
494496
return true;
495497

498+
if (ReferentialIntegritySnapshotOverride)
499+
return HeapTupleSatisfiesNow(tuple);
500+
496501
if (!(tuple->t_infomask & HEAP_XMIN_COMMITTED))
497502
{
498503
if (tuple->t_infomask & HEAP_XMIN_INVALID)
@@ -606,6 +611,9 @@ void
606611
SetQuerySnapshot(void)
607612
{
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614+
/* Initialize snapshot overriding to false */
615+
ReferentialIntegritySnapshotOverride = false;
616+
609617
/* 1st call in xaction */
610618
if (SerializableSnapshot == NULL)
611619
{

‎src/include/utils/tqual.h

Lines changed: 3 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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* $Id: tqual.h,v 1.25 1999/09/29 16:06:28 wieck Exp $
10+
* $Id: tqual.h,v 1.26 1999/12/10 12:34:15 wieck Exp $
1111
*
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*-------------------------------------------------------------------------
1313
*/
@@ -36,6 +36,8 @@ extern Snapshot SnapshotDirty;
3636
extern Snapshot QuerySnapshot;
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extern Snapshot SerializableSnapshot;
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39+
extern bool ReferentialIntegritySnapshotOverride;
40+
3941
#define IsSnapshotNow(snapshot) ((Snapshot) snapshot == SnapshotNow)
4042
#define IsSnapshotSelf(snapshot) ((Snapshot) snapshot == SnapshotSelf)
4143
#define IsSnapshotAny(snapshot) ((Snapshot) snapshot == SnapshotAny)

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