From 62c42a05a214920ce909fe7e59653eec70ef3e11 Mon Sep 17 00:00:00 2001
From: Jan Wieck <JanWieck@Yahoo.com>
Date: Fri, 10 Dec 1999 12:34:15 +0000
Subject: [PATCH] Added global variable to have RI triggers override time
qualification of HeapTupleSatisfiesSnapshot()
Jan
---
src/backend/commands/trigger.c | 8 ++++++++
src/backend/utils/adt/ri_triggers.c | 11 ++++++++++-
src/backend/utils/time/tqual.c | 10 +++++++++-
src/include/utils/tqual.h | 4 +++-
4 files changed, 30 insertions(+), 3 deletions(-)
diff --git a/src/backend/commands/trigger.c b/src/backend/commands/trigger.c
index d16d9a55843..695b216fb55 100644
--- a/src/backend/commands/trigger.c
+++ b/src/backend/commands/trigger.c
@@ -24,6 +24,7 @@
#include "utils/builtins.h"
#include "utils/inval.h"
#include "utils/syscache.h"
+#include "utils/tqual.h"
DLLIMPORT TriggerData *CurrentTriggerData = NULL;
@@ -1151,6 +1152,13 @@ deferredTriggerExecute(DeferredTriggerEvent event, int itemno)
if (rettuple != NULL && rettuple != &oldtuple && rettuple != &newtuple)
pfree(rettuple);
+ /* ----------
+ * Might have been a referential integrity constraint trigger.
+ * Reset the snapshot overriding flag.
+ * ----------
+ */
+ ReferentialIntegritySnapshotOverride = false;
+
/* ----------
* Release buffers and close the relation
* ----------
diff --git a/src/backend/utils/adt/ri_triggers.c b/src/backend/utils/adt/ri_triggers.c
index a9b5c7cf2d0..323c1050a6f 100644
--- a/src/backend/utils/adt/ri_triggers.c
+++ b/src/backend/utils/adt/ri_triggers.c
@@ -6,7 +6,7 @@
*
* 1999 Jan Wieck
*
- * $Header: /cvsroot/pgsql/src/backend/utils/adt/ri_triggers.c,v 1.9 1999/12/08 20:41:22 wieck Exp $
+ * $Header: /cvsroot/pgsql/src/backend/utils/adt/ri_triggers.c,v 1.10 1999/12/10 12:34:13 wieck Exp $
*
* ----------
*/
@@ -163,6 +163,7 @@ RI_FKey_check (FmgrInfo *proinfo)
trigdata = CurrentTriggerData;
CurrentTriggerData = NULL;
+ ReferentialIntegritySnapshotOverride = true;
/* ----------
* Check that this is a valid trigger call on the right time and event.
@@ -489,6 +490,7 @@ RI_FKey_cascade_del (FmgrInfo *proinfo)
trigdata = CurrentTriggerData;
CurrentTriggerData = NULL;
+ ReferentialIntegritySnapshotOverride = true;
/* ----------
* Check that this is a valid trigger call on the right time and event.
@@ -686,6 +688,7 @@ RI_FKey_cascade_upd (FmgrInfo *proinfo)
trigdata = CurrentTriggerData;
CurrentTriggerData = NULL;
+ ReferentialIntegritySnapshotOverride = true;
/* ----------
* Check that this is a valid trigger call on the right time and event.
@@ -911,6 +914,7 @@ RI_FKey_restrict_del (FmgrInfo *proinfo)
trigdata = CurrentTriggerData;
CurrentTriggerData = NULL;
+ ReferentialIntegritySnapshotOverride = true;
/* ----------
* Check that this is a valid trigger call on the right time and event.
@@ -1118,6 +1122,7 @@ RI_FKey_restrict_upd (FmgrInfo *proinfo)
trigdata = CurrentTriggerData;
CurrentTriggerData = NULL;
+ ReferentialIntegritySnapshotOverride = true;
/* ----------
* Check that this is a valid trigger call on the right time and event.
@@ -1333,6 +1338,7 @@ RI_FKey_setnull_del (FmgrInfo *proinfo)
trigdata = CurrentTriggerData;
CurrentTriggerData = NULL;
+ ReferentialIntegritySnapshotOverride = true;
/* ----------
* Check that this is a valid trigger call on the right time and event.
@@ -1540,6 +1546,7 @@ RI_FKey_setnull_upd (FmgrInfo *proinfo)
trigdata = CurrentTriggerData;
CurrentTriggerData = NULL;
+ ReferentialIntegritySnapshotOverride = true;
/* ----------
* Check that this is a valid trigger call on the right time and event.
@@ -1758,6 +1765,7 @@ RI_FKey_setdefault_del (FmgrInfo *proinfo)
trigdata = CurrentTriggerData;
CurrentTriggerData = NULL;
+ ReferentialIntegritySnapshotOverride = true;
/* ----------
* Check that this is a valid trigger call on the right time and event.
@@ -2005,6 +2013,7 @@ RI_FKey_setdefault_upd (FmgrInfo *proinfo)
trigdata = CurrentTriggerData;
CurrentTriggerData = NULL;
+ ReferentialIntegritySnapshotOverride = true;
/* ----------
* Check that this is a valid trigger call on the right time and event.
diff --git a/src/backend/utils/time/tqual.c b/src/backend/utils/time/tqual.c
index 97080e010f9..4a96c5736cf 100644
--- a/src/backend/utils/time/tqual.c
+++ b/src/backend/utils/time/tqual.c
@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/utils/time/tqual.c,v 1.32 1999/10/06 21:58:11 vadim Exp $
+ * $Header: /cvsroot/pgsql/src/backend/utils/time/tqual.c,v 1.33 1999/12/10 12:34:14 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@@ -24,6 +24,8 @@ Snapshot SnapshotDirty = &SnapshotDirtyData;
Snapshot QuerySnapshot = NULL;
Snapshot SerializableSnapshot = NULL;
+bool ReferentialIntegritySnapshotOverride = false;
+
/*
* XXX Transaction system override hacks start here
*/
@@ -493,6 +495,9 @@ HeapTupleSatisfiesSnapshot(HeapTupleHeader tuple, Snapshot snapshot)
if (AMI_OVERRIDE)
return true;
+ if (ReferentialIntegritySnapshotOverride)
+ return HeapTupleSatisfiesNow(tuple);
+
if (!(tuple->t_infomask & HEAP_XMIN_COMMITTED))
{
if (tuple->t_infomask & HEAP_XMIN_INVALID)
@@ -606,6 +611,9 @@ void
SetQuerySnapshot(void)
{
+ /* Initialize snapshot overriding to false */
+ ReferentialIntegritySnapshotOverride = false;
+
/* 1st call in xaction */
if (SerializableSnapshot == NULL)
{
diff --git a/src/include/utils/tqual.h b/src/include/utils/tqual.h
index d8aa6638f6a..89314764ea6 100644
--- a/src/include/utils/tqual.h
+++ b/src/include/utils/tqual.h
@@ -7,7 +7,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
- * $Id: tqual.h,v 1.25 1999/09/29 16:06:28 wieck Exp $
+ * $Id: tqual.h,v 1.26 1999/12/10 12:34:15 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@@ -36,6 +36,8 @@ extern Snapshot SnapshotDirty;
extern Snapshot QuerySnapshot;
extern Snapshot SerializableSnapshot;
+extern bool ReferentialIntegritySnapshotOverride;
+
#define IsSnapshotNow(snapshot) ((Snapshot) snapshot == SnapshotNow)
#define IsSnapshotSelf(snapshot) ((Snapshot) snapshot == SnapshotSelf)
#define IsSnapshotAny(snapshot) ((Snapshot) snapshot == SnapshotAny)
--
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