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Changes pg_trigger and extend pg_rewrite in order to allow triggers and

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rules to be defined with different, per session controllable, behaviors
for replication purposes.

This will allow replication systems like Slony-I and, as has been stated
on pgsql-hackers, other products to control the firing mechanism of
triggers and rewrite rules without modifying the system catalog directly.

The firing mechanisms are controlled by a new superuser-only GUC
variable, session_replication_role, together with a change to
pg_trigger.tgenabled and a new column pg_rewrite.ev_enabled. Both
columns are a single char data type now (tgenabled was a bool before).
The possible values in these attributes are:

     'O' - Trigger/Rule fires when session_replication_role is "origin"
           (default) or "local". This is the default behavior.

     'D' - Trigger/Rule is disabled and fires never

     'A' - Trigger/Rule fires always regardless of the setting of
           session_replication_role

     'R' - Trigger/Rule fires when session_replication_role is "replica"

The GUC variable can only be changed as long as the system does not have
any cached query plans. This will prevent changing the session role and
accidentally executing stored procedures or functions that have plans
cached that expand to the wrong query set due to differences in the rule
firing semantics.

The SQL syntax for changing a triggers/rules firing semantics is

     ALTER TABLE <tabname> <when> TRIGGER|RULE <name>;

     <when> ::= ENABLE | ENABLE ALWAYS | ENABLE REPLICA | DISABLE

psql's \d command as well as pg_dump are extended in a backward
compatible fashion.

Jan
REL8_3_STABLE
Jan Wieck 19 years ago
parent e927f8f14e
commit 0fe16500d3
24 changed files with 706 additions and 154 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 27
      doc/src/sgml/catalogs.sgml
  2. 19
      doc/src/sgml/config.sgml
  3. 33
      doc/src/sgml/ref/alter_table.sgml
  4. 78
      src/backend/commands/tablecmds.c
  5. 119
      src/backend/commands/trigger.c
  6. 58
      src/backend/parser/gram.y
  7. 4
      src/backend/parser/keywords.c
  8. 70
      src/backend/rewrite/rewriteDefine.c
  9. 27
      src/backend/rewrite/rewriteHandler.c
  10. 13
      src/backend/utils/cache/plancache.c
  11. 3
      src/backend/utils/cache/relcache.c
  12. 44
      src/backend/utils/misc/guc.c
  13. 1
      src/backend/utils/misc/postgresql.conf.sample
  14. 71
      src/bin/pg_dump/pg_dump.c
  15. 5
      src/bin/pg_dump/pg_dump.h
  16. 227
      src/bin/psql/describe.c
  17. 12
      src/include/catalog/pg_rewrite.h
  18. 5
      src/include/catalog/pg_trigger.h
  19. 16
      src/include/commands/trigger.h
  20. 8
      src/include/nodes/parsenodes.h
  21. 3
      src/include/rewrite/prs2lock.h
  22. 10
      src/include/rewrite/rewriteDefine.h
  23. 3
      src/include/utils/plancache.h
  24. 4
      src/include/utils/rel.h

27
doc/src/sgml/catalogs.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/catalogs.sgml,v 2.145 2007/02/14 01:58:55 tgl Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/catalogs.sgml,v 2.146 2007/03/19 23:38:28 wieck Exp $ -->
<!--
Documentation of the system catalogs, directed toward PostgreSQL developers
-->
@ -3639,6 +3639,20 @@
</entry>
</row>
<row>
<entry><structfield>ev_enabled</structfield></entry>
<entry><type>char</type></entry>
<entry></entry>
<entry>
Controls in which <xref linkend="guc-session-replication-role"> modes
the rule fires.
<literal>O</> = rule fires in <quote>origin</> and <quote>local</> modes,
<literal>D</> = rule is disabled,
<literal>R</> = rule fires in <quote>replica</> mode,
<literal>A</> = rule fires always.
</entry>
</row>
<row>
<entry><structfield>is_instead</structfield></entry>
<entry><type>bool</type></entry>
@ -4178,9 +4192,16 @@
<row>
<entry><structfield>tgenabled</structfield></entry>
<entry><type>bool</type></entry>
<entry><type>char</type></entry>
<entry></entry>
<entry>True if trigger is enabled</entry>
<entry>
Controls in which <xref linkend="guc-session-replication-role"> modes
the trigger fires.
<literal>O</> = trigger fires in <quote>origin</> and <quote>local</> modes,
<literal>D</> = trigger is disabled,
<literal>R</> = trigger fires in <quote>replica</> mode,
<literal>A</> = trigger fires always.
</entry>
</row>
<row>

19
doc/src/sgml/config.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.115 2007/03/06 02:06:12 momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.116 2007/03/19 23:38:28 wieck Exp $ -->
<chapter Id="runtime-config">
<title>Server Configuration</title>
@ -3523,6 +3523,23 @@ SELECT * FROM parent WHERE key = 2400;
</listitem>
</varlistentry>
<varlistentry id="guc-session-replication-role" xreflabel="session_replication_role">
<term><varname>session_replication_role</varname> (<type>string</type>)</term>
<indexterm>
<primary><varname>session_replication_role</> configuration parameter</primary>
</indexterm>
<listitem>
<para>
Controls the trigger and rule firing for the current session.
See <xref linkend="sql-altertable"> for the different options to
enable or disable triggers and rules. Setting the variable requires
superuser privilege and can only be done before any query plans have
been cached. Possible values are <literal>origin</>,
<literal>replica</> and <literal>local</>.
</para>
</listitem>
</varlistentry>
<varlistentry id="guc-vacuum-freeze-min-age" xreflabel="vacuum_freeze_min_age">
<term><varname>vacuum_freeze_min_age</varname> (<type>integer</type>)</term>
<indexterm>

33
doc/src/sgml/ref/alter_table.sgml
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@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/alter_table.sgml,v 1.94 2007/02/01 00:28:18 momjian Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/alter_table.sgml,v 1.95 2007/03/19 23:38:29 wieck Exp $
PostgreSQL documentation
-->
@ -43,6 +43,12 @@ where <replaceable class="PARAMETER">action</replaceable> is one of:
DROP CONSTRAINT <replaceable class="PARAMETER">constraint_name</replaceable> [ RESTRICT | CASCADE ]
DISABLE TRIGGER [ <replaceable class="PARAMETER">trigger_name</replaceable> | ALL | USER ]
ENABLE TRIGGER [ <replaceable class="PARAMETER">trigger_name</replaceable> | ALL | USER ]
ENABLE REPLICA TRIGGER <replaceable class="PARAMETER">trigger_name</replaceable>
ENABLE ALWAYS TRIGGER <replaceable class="PARAMETER">trigger_name</replaceable>
DISABLE RULE <replaceable class="PARAMETER">rewrite_rule_name</replaceable>
ENABLE RULE <replaceable class="PARAMETER">rewrite_rule_name</replaceable>
ENABLE REPLICA RULE <replaceable class="PARAMETER">rewrite_rule_name</replaceable>
ENABLE ALWAYS RULE <replaceable class="PARAMETER">rewrite_rule_name</replaceable>
CLUSTER ON <replaceable class="PARAMETER">index_name</replaceable>
SET WITHOUT CLUSTER
SET WITHOUT OIDS
@ -193,10 +199,10 @@ where <replaceable class="PARAMETER">action</replaceable> is one of:
</varlistentry>
<varlistentry>
<term><literal>DISABLE</literal>/<literal>ENABLE TRIGGER</literal></term>
<term><literal>DISABLE</literal>/<literal>ENABLE [ REPLICA | ALWAYS ] TRIGGER</literal></term>
<listitem>
<para>
These forms disable or enable trigger(s) belonging to the table.
These forms configure the firing of trigger(s) belonging to the table.
A disabled trigger is still known to the system, but is not executed
when its triggering event occurs. For a deferred trigger, the enable
status is checked when the event occurs, not when the trigger function
@ -207,6 +213,27 @@ where <replaceable class="PARAMETER">action</replaceable> is one of:
requires superuser privileges; it should be done with caution since
of course the integrity of the constraint cannot be guaranteed if the
triggers are not executed.
The trigger firing mechanism is also affected by the configuration
variable <xref linkend="guc-session-replication-role">. Simply ENABLEd
triggers will fire when the replication role is <quote>origin</>
(the default) or <quote>local</>. Triggers configured ENABLE REPLICA
will only fire if the session is in <quote>replica</> mode and triggers
configured ENABLE ALWAYS will fire regardless of the current replication
mode.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>DISABLE</literal>/<literal>ENABLE [ REPLICA | ALWAYS ] RULE</literal></term>
<listitem>
<para>
These forms configure the firing of rewrite rules belonging to the table.
A disabled rule is still known to the system, but is not applied
during query rewriting. The semantics are as for disabled/enabled
triggers. This configuration is ignored for ON SELECT rules, which
are always applied in order to keep views working even if the current
session is in a non-default replication role.
</para>
</listitem>
</varlistentry>

78
src/backend/commands/tablecmds.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/tablecmds.c,v 1.217 2007/03/13 00:33:39 tgl Exp $
* $PostgreSQL: pgsql/src/backend/commands/tablecmds.c,v 1.218 2007/03/19 23:38:29 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@ -53,6 +53,7 @@
#include "parser/parse_relation.h"
#include "parser/parse_type.h"
#include "parser/parser.h"
#include "rewrite/rewriteDefine.h"
#include "rewrite/rewriteHandler.h"
#include "storage/smgr.h"
#include "utils/acl.h"
@ -253,7 +254,9 @@ static void ATPrepSetTableSpace(AlteredTableInfo *tab, Relation rel,
static void ATExecSetTableSpace(Oid tableOid, Oid newTableSpace);
static void ATExecSetRelOptions(Relation rel, List *defList, bool isReset);
static void ATExecEnableDisableTrigger(Relation rel, char *trigname,
bool enable, bool skip_system);
char fires_when, bool skip_system);
static void ATExecEnableDisableRule(Relation rel, char *rulename,
char fires_when);
static void ATExecAddInherit(Relation rel, RangeVar *parent);
static void ATExecDropInherit(Relation rel, RangeVar *parent);
static void copy_relation_data(Relation rel, SMgrRelation dst);
@ -1955,11 +1958,17 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
pass = AT_PASS_MISC;
break;
case AT_EnableTrig: /* ENABLE TRIGGER variants */
case AT_EnableAlwaysTrig:
case AT_EnableReplicaTrig:
case AT_EnableTrigAll:
case AT_EnableTrigUser:
case AT_DisableTrig: /* DISABLE TRIGGER variants */
case AT_DisableTrigAll:
case AT_DisableTrigUser:
case AT_EnableRule: /* ENABLE/DISABLE RULE variants */
case AT_EnableAlwaysRule:
case AT_EnableReplicaRule:
case AT_DisableRule:
case AT_AddInherit: /* INHERIT / NO INHERIT */
case AT_DropInherit:
ATSimplePermissions(rel, false);
@ -2127,24 +2136,57 @@ ATExecCmd(AlteredTableInfo *tab, Relation rel, AlterTableCmd *cmd)
case AT_ResetRelOptions: /* RESET (...) */
ATExecSetRelOptions(rel, (List *) cmd->def, true);
break;
case AT_EnableTrig: /* ENABLE TRIGGER name */
ATExecEnableDisableTrigger(rel, cmd->name, true, false);
case AT_EnableTrig: /* ENABLE TRIGGER name */
ATExecEnableDisableTrigger(rel, cmd->name,
TRIGGER_FIRES_ON_ORIGIN, false);
break;
case AT_EnableAlwaysTrig: /* ENABLE ALWAYS TRIGGER name */
ATExecEnableDisableTrigger(rel, cmd->name,
TRIGGER_FIRES_ALWAYS, false);
break;
case AT_EnableReplicaTrig: /* ENABLE REPLICA TRIGGER name */
ATExecEnableDisableTrigger(rel, cmd->name,
TRIGGER_FIRES_ON_REPLICA, false);
break;
case AT_DisableTrig: /* DISABLE TRIGGER name */
ATExecEnableDisableTrigger(rel, cmd->name, false, false);
ATExecEnableDisableTrigger(rel, cmd->name,
TRIGGER_DISABLED, false);
break;
case AT_EnableTrigAll: /* ENABLE TRIGGER ALL */
ATExecEnableDisableTrigger(rel, NULL, true, false);
ATExecEnableDisableTrigger(rel, NULL,
TRIGGER_FIRES_ON_ORIGIN, false);
break;
case AT_DisableTrigAll: /* DISABLE TRIGGER ALL */
ATExecEnableDisableTrigger(rel, NULL, false, false);
ATExecEnableDisableTrigger(rel, NULL,
TRIGGER_DISABLED, false);
break;
case AT_EnableTrigUser: /* ENABLE TRIGGER USER */
ATExecEnableDisableTrigger(rel, NULL, true, true);
ATExecEnableDisableTrigger(rel, NULL,
TRIGGER_FIRES_ON_ORIGIN, true);
break;
case AT_DisableTrigUser: /* DISABLE TRIGGER USER */
ATExecEnableDisableTrigger(rel, NULL, false, true);
ATExecEnableDisableTrigger(rel, NULL,
TRIGGER_DISABLED, true);
break;
case AT_EnableRule: /* ENABLE RULE name */
ATExecEnableDisableRule(rel, cmd->name,
RULE_FIRES_ON_ORIGIN);
break;
case AT_EnableAlwaysRule: /* ENABLE ALWAYS RULE name */
ATExecEnableDisableRule(rel, cmd->name,
RULE_FIRES_ALWAYS);
break;
case AT_EnableReplicaRule: /* ENABLE REPLICA RULE name */
ATExecEnableDisableRule(rel, cmd->name,
RULE_FIRES_ON_REPLICA);
break;
case AT_DisableRule: /* DISABLE RULE name */
ATExecEnableDisableRule(rel, cmd->name,
RULE_DISABLED);
break;
case AT_AddInherit:
ATExecAddInherit(rel, (RangeVar *) cmd->def);
break;
@ -4380,7 +4422,7 @@ validateForeignKeyConstraint(FkConstraint *fkconstraint,
MemSet(&trig, 0, sizeof(trig));
trig.tgoid = InvalidOid;
trig.tgname = fkconstraint->constr_name;
trig.tgenabled = TRUE;
trig.tgenabled = TRIGGER_FIRES_ON_ORIGIN;
trig.tgisconstraint = TRUE;
trig.tgconstrrelid = RelationGetRelid(pkrel);
trig.tgconstraint = constraintOid;
@ -5877,9 +5919,21 @@ copy_relation_data(Relation rel, SMgrRelation dst)
*/
static void
ATExecEnableDisableTrigger(Relation rel, char *trigname,
bool enable, bool skip_system)
char fires_when, bool skip_system)
{
EnableDisableTrigger(rel, trigname, fires_when, skip_system);
}
/*
* ALTER TABLE ENABLE/DISABLE RULE
*
* We just pass this off to rewriteDefine.c.
*/
static void
ATExecEnableDisableRule(Relation rel, char *trigname,
char fires_when)
{
EnableDisableTrigger(rel, trigname, enable, skip_system);
EnableDisableRule(rel, trigname, fires_when);
}
/*

119
src/backend/commands/trigger.c
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/trigger.c,v 1.213 2007/02/14 01:58:56 tgl Exp $
* $PostgreSQL: pgsql/src/backend/commands/trigger.c,v 1.214 2007/03/19 23:38:29 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@ -54,6 +54,13 @@ static HeapTuple ExecCallTriggerFunc(TriggerData *trigdata,
static void AfterTriggerSaveEvent(ResultRelInfo *relinfo, int event,
bool row_trigger, HeapTuple oldtup, HeapTuple newtup);
/*
* SessionReplicationRole -
*
* Global variable that controls the trigger firing behaviour based
* on pg_trigger.tgenabled. This is maintained from misc/guc.c.
*/
int SessionReplicationRole = SESSION_REPLICATION_ROLE_ORIGIN;
/*
* Create a trigger. Returns the OID of the created trigger.
@ -270,7 +277,7 @@ CreateTrigger(CreateTrigStmt *stmt, Oid constraintOid)
CStringGetDatum(trigname));
values[Anum_pg_trigger_tgfoid - 1] = ObjectIdGetDatum(funcoid);
values[Anum_pg_trigger_tgtype - 1] = Int16GetDatum(tgtype);
values[Anum_pg_trigger_tgenabled - 1] = BoolGetDatum(true);
values[Anum_pg_trigger_tgenabled - 1] = CharGetDatum(TRIGGER_FIRES_ON_ORIGIN);
values[Anum_pg_trigger_tgisconstraint - 1] = BoolGetDatum(stmt->isconstraint);
values[Anum_pg_trigger_tgconstrname - 1] = DirectFunctionCall1(namein,
CStringGetDatum(constrname));
@ -701,11 +708,11 @@ renametrig(Oid relid,
* EnableDisableTrigger()
*
* Called by ALTER TABLE ENABLE/DISABLE TRIGGER
* to change 'tgenabled' flag for the specified trigger(s)
* to change 'tgenabled' field for the specified trigger(s)
*
* rel: relation to process (caller must hold suitable lock on it)
* tgname: trigger to process, or NULL to scan all triggers
* enable: new value for tgenabled flag
* enable: new value for tgenabled field
* skip_system: if true, skip "system" triggers (constraint triggers)
*
* Caller should have checked permissions for the table; here we also
@ -714,7 +721,7 @@ renametrig(Oid relid,
*/
void
EnableDisableTrigger(Relation rel, const char *tgname,
bool enable, bool skip_system)
char fires_when, bool skip_system)
{
Relation tgrel;
int nkeys;
@ -765,13 +772,13 @@ EnableDisableTrigger(Relation rel, const char *tgname,
found = true;
if (oldtrig->tgenabled != enable)
if (oldtrig->tgenabled != fires_when)
{
/* need to change this one ... make a copy to scribble on */
HeapTuple newtup = heap_copytuple(tuple);
Form_pg_trigger newtrig = (Form_pg_trigger) GETSTRUCT(newtup);
newtrig->tgenabled = enable;
newtrig->tgenabled = fires_when;
simple_heap_update(tgrel, &newtup->t_self, newtup);
@ -1333,8 +1340,18 @@ ExecBSInsertTriggers(EState *estate, ResultRelInfo *relinfo)
Trigger *trigger = &trigdesc->triggers[tgindx[i]];
HeapTuple newtuple;
if (!trigger->tgenabled)
continue;
if (SessionReplicationRole == SESSION_REPLICATION_ROLE_REPLICA)
{
if (trigger->tgenabled == TRIGGER_FIRES_ON_ORIGIN ||
trigger->tgenabled == TRIGGER_DISABLED)
continue;
}
else /* ORIGIN or LOCAL role */
{
if (trigger->tgenabled == TRIGGER_FIRES_ON_REPLICA ||
trigger->tgenabled == TRIGGER_DISABLED)
continue;
}
LocTriggerData.tg_trigger = trigger;
newtuple = ExecCallTriggerFunc(&LocTriggerData,
tgindx[i],
@ -1382,8 +1399,18 @@ ExecBRInsertTriggers(EState *estate, ResultRelInfo *relinfo,
{
Trigger *trigger = &trigdesc->triggers[tgindx[i]];
if (!trigger->tgenabled)
continue;
if (SessionReplicationRole == SESSION_REPLICATION_ROLE_REPLICA)
{
if (trigger->tgenabled == TRIGGER_FIRES_ON_ORIGIN ||
trigger->tgenabled == TRIGGER_DISABLED)
continue;
}
else /* ORIGIN or LOCAL role */
{
if (trigger->tgenabled == TRIGGER_FIRES_ON_REPLICA ||
trigger->tgenabled == TRIGGER_DISABLED)
continue;
}
LocTriggerData.tg_trigtuple = oldtuple = newtuple;
LocTriggerData.tg_trigtuplebuf = InvalidBuffer;
LocTriggerData.tg_trigger = trigger;
@ -1444,8 +1471,18 @@ ExecBSDeleteTriggers(EState *estate, ResultRelInfo *relinfo)
Trigger *trigger = &trigdesc->triggers[tgindx[i]];
HeapTuple newtuple;
if (!trigger->tgenabled)
continue;
if (SessionReplicationRole == SESSION_REPLICATION_ROLE_REPLICA)
{
if (trigger->tgenabled == TRIGGER_FIRES_ON_ORIGIN ||
trigger->tgenabled == TRIGGER_DISABLED)
continue;
}
else /* ORIGIN or LOCAL role */
{
if (trigger->tgenabled == TRIGGER_FIRES_ON_REPLICA ||
trigger->tgenabled == TRIGGER_DISABLED)
continue;
}
LocTriggerData.tg_trigger = trigger;
newtuple = ExecCallTriggerFunc(&LocTriggerData,
tgindx[i],
@ -1500,8 +1537,18 @@ ExecBRDeleteTriggers(EState *estate, ResultRelInfo *relinfo,
{
Trigger *trigger = &trigdesc->triggers[tgindx[i]];
if (!trigger->tgenabled)
continue;
if (SessionReplicationRole == SESSION_REPLICATION_ROLE_REPLICA)
{
if (trigger->tgenabled == TRIGGER_FIRES_ON_ORIGIN ||
trigger->tgenabled == TRIGGER_DISABLED)
continue;
}
else /* ORIGIN or LOCAL role */
{
if (trigger->tgenabled == TRIGGER_FIRES_ON_REPLICA ||
trigger->tgenabled == TRIGGER_DISABLED)
continue;
}
LocTriggerData.tg_trigtuple = trigtuple;
LocTriggerData.tg_trigtuplebuf = InvalidBuffer;
LocTriggerData.tg_trigger = trigger;
@ -1575,8 +1622,18 @@ ExecBSUpdateTriggers(EState *estate, ResultRelInfo *relinfo)
Trigger *trigger = &trigdesc->triggers[tgindx[i]];
HeapTuple newtuple;
if (!trigger->tgenabled)
continue;
if (SessionReplicationRole == SESSION_REPLICATION_ROLE_REPLICA)
{
if (trigger->tgenabled == TRIGGER_FIRES_ON_ORIGIN ||
trigger->tgenabled == TRIGGER_DISABLED)
continue;
}
else /* ORIGIN or LOCAL role */
{
if (trigger->tgenabled == TRIGGER_FIRES_ON_REPLICA ||
trigger->tgenabled == TRIGGER_DISABLED)
continue;
}
LocTriggerData.tg_trigger = trigger;
newtuple = ExecCallTriggerFunc(&LocTriggerData,
tgindx[i],
@ -1636,8 +1693,18 @@ ExecBRUpdateTriggers(EState *estate, ResultRelInfo *relinfo,
{
Trigger *trigger = &trigdesc->triggers[tgindx[i]];
if (!trigger->tgenabled)
continue;
if (SessionReplicationRole == SESSION_REPLICATION_ROLE_REPLICA)
{
if (trigger->tgenabled == TRIGGER_FIRES_ON_ORIGIN ||
trigger->tgenabled == TRIGGER_DISABLED)
continue;
}
else /* ORIGIN or LOCAL role */
{
if (trigger->tgenabled == TRIGGER_FIRES_ON_REPLICA ||
trigger->tgenabled == TRIGGER_DISABLED)
continue;
}
LocTriggerData.tg_trigtuple = trigtuple;
LocTriggerData.tg_newtuple = oldtuple = newtuple;
LocTriggerData.tg_trigtuplebuf = InvalidBuffer;
@ -3267,8 +3334,18 @@ AfterTriggerSaveEvent(ResultRelInfo *relinfo, int event, bool row_trigger,
Trigger *trigger = &trigdesc->triggers[tgindx[i]];
/* Ignore disabled triggers */
if (!trigger->tgenabled)
continue;
if (SessionReplicationRole == SESSION_REPLICATION_ROLE_REPLICA)
{
if (trigger->tgenabled == TRIGGER_FIRES_ON_ORIGIN ||
trigger->tgenabled == TRIGGER_DISABLED)
continue;
}
else /* ORIGIN or LOCAL role */
{
if (trigger->tgenabled == TRIGGER_FIRES_ON_REPLICA ||
trigger->tgenabled == TRIGGER_DISABLED)
continue;
}
/*
* If this is an UPDATE of a PK table or FK table that does not change

58
src/backend/parser/gram.y
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@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.582 2007/03/17 19:27:12 meskes Exp $
* $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.583 2007/03/19 23:38:29 wieck Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@ -365,7 +365,7 @@ static Node *makeXmlExpr(XmlExprOp op, char *name, List *named_args, List *args)
/* ordinary key words in alphabetical order */
%token <keyword> ABORT_P ABSOLUTE_P ACCESS ACTION ADD_P ADMIN AFTER
AGGREGATE ALL ALSO ALTER ANALYSE ANALYZE AND ANY ARRAY AS ASC
AGGREGATE ALL ALSO ALTER ALWAYS ANALYSE ANALYZE AND ANY ARRAY AS ASC
ASSERTION ASSIGNMENT ASYMMETRIC AT AUTHORIZATION
BACKWARD BEFORE BEGIN_P BETWEEN BIGINT BINARY BIT
@ -422,8 +422,8 @@ static Node *makeXmlExpr(XmlExprOp op, char *name, List *named_args, List *args)
QUOTE
READ REAL REASSIGN RECHECK REFERENCES REINDEX RELATIVE_P RELEASE RENAME
REPEATABLE REPLACE RESET RESTART RESTRICT RETURNING RETURNS REVOKE RIGHT
ROLE ROLLBACK ROW ROWS RULE
REPEATABLE REPLACE REPLICA RESET RESTART RESTRICT RETURNING RETURNS REVOKE
RIGHT ROLE ROLLBACK ROW ROWS RULE
SAVEPOINT SCHEMA SCROLL SECOND_P SECURITY SELECT SEQUENCE
SERIALIZABLE SESSION SESSION_USER SET SETOF SHARE
@ -1480,6 +1480,22 @@ alter_table_cmd:
n->name = $3;
$$ = (Node *)n;
}
/* ALTER TABLE <name> ENABLE ALWAYS TRIGGER <trig> */
| ENABLE_P ALWAYS TRIGGER name
{
AlterTableCmd *n = makeNode(AlterTableCmd);
n->subtype = AT_EnableAlwaysTrig;
n->name = $4;
$$ = (Node *)n;
}
/* ALTER TABLE <name> ENABLE REPLICA TRIGGER <trig> */
| ENABLE_P REPLICA TRIGGER name
{
AlterTableCmd *n = makeNode(AlterTableCmd);
n->subtype = AT_EnableReplicaTrig;
n->name = $4;
$$ = (Node *)n;
}
/* ALTER TABLE <name> ENABLE TRIGGER ALL */
| ENABLE_P TRIGGER ALL
{
@ -1516,6 +1532,38 @@ alter_table_cmd:
n->subtype = AT_DisableTrigUser;
$$ = (Node *)n;
}
/* ALTER TABLE <name> ENABLE RULE <rule> */
| ENABLE_P RULE name
{
AlterTableCmd *n = makeNode(AlterTableCmd);
n->subtype = AT_EnableRule;
n->name = $3;
$$ = (Node *)n;
}
/* ALTER TABLE <name> ENABLE ALWAYS RULE <rule> */
| ENABLE_P ALWAYS RULE name
{
AlterTableCmd *n = makeNode(AlterTableCmd);
n->subtype = AT_EnableAlwaysRule;
n->name = $4;
$$ = (Node *)n;
}
/* ALTER TABLE <name> ENABLE REPLICA RULE <rule> */
| ENABLE_P REPLICA RULE name
{
AlterTableCmd *n = makeNode(AlterTableCmd);
n->subtype = AT_EnableReplicaRule;
n->name = $4;
$$ = (Node *)n;
}
/* ALTER TABLE <name> DISABLE RULE <rule> */
| DISABLE_P RULE name
{
AlterTableCmd *n = makeNode(AlterTableCmd);
n->subtype = AT_DisableRule;
n->name = $3;
$$ = (Node *)n;
}
/* ALTER TABLE <name> INHERIT <parent> */
| INHERIT qualified_name
{
@ -8651,6 +8699,7 @@ unreserved_keyword:
| AGGREGATE
| ALSO
| ALTER
| ALWAYS
| ASSERTION
| ASSIGNMENT
| AT
@ -8796,6 +8845,7 @@ unreserved_keyword:
| RENAME
| REPEATABLE
| REPLACE
| REPLICA
| RESET
| RESTART
| RESTRICT

4
src/backend/parser/keywords.c
Unescape View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/parser/keywords.c,v 1.184 2007/01/25 11:53:51 petere Exp $
* $PostgreSQL: pgsql/src/backend/parser/keywords.c,v 1.185 2007/03/19 23:38:29 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@ -42,6 +42,7 @@ static const ScanKeyword ScanKeywords[] = {
{"all", ALL},
{"also", ALSO},
{"alter", ALTER},
{"always", ALWAYS},
{"analyse", ANALYSE}, /* British spelling */
{"analyze", ANALYZE},
{"and", AND},
@ -289,6 +290,7 @@ static const ScanKeyword ScanKeywords[] = {
{"rename", RENAME},
{"repeatable", REPEATABLE},
{"replace", REPLACE},
{"replica", REPLICA},
{"reset", RESET},
{"restart", RESTART},
{"restrict", RESTRICT},

70
src/backend/rewrite/rewriteDefine.c
Unescape View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/rewrite/rewriteDefine.c,v 1.118 2007/03/13 00:33:42 tgl Exp $
* $PostgreSQL: pgsql/src/backend/rewrite/rewriteDefine.c,v 1.119 2007/03/19 23:38:29 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@ -30,6 +30,7 @@
#include "utils/builtins.h"
#include "utils/lsyscache.h"
#include "utils/syscache.h"
#include "utils/inval.h"
static void checkRuleResultList(List *targetList, TupleDesc resultDesc,
@ -79,6 +80,7 @@ InsertRule(char *rulname,
values[i++] = ObjectIdGetDatum(eventrel_oid); /* ev_class */
values[i++] = Int16GetDatum(evslot_index); /* ev_attr */
values[i++] = CharGetDatum(evtype + '0'); /* ev_type */
values[i++] = CharGetDatum(RULE_FIRES_ON_ORIGIN); /* ev_enabled */
values[i++] = BoolGetDatum(evinstead); /* is_instead */
values[i++] = DirectFunctionCall1(textin, CStringGetDatum(evqual)); /* ev_qual */
values[i++] = DirectFunctionCall1(textin, CStringGetDatum(actiontree)); /* ev_action */
@ -628,6 +630,72 @@ setRuleCheckAsUser_Query(Query *qry, Oid userid)
}
/*
* Change the firing semantics of an existing rule.
*
*/
void
EnableDisableRule(Relation rel, const char *rulename,
char fires_when)
{
Relation pg_rewrite_desc;
Oid owningRel = RelationGetRelid(rel);
Oid eventRelationOid;
HeapTuple ruletup;
bool changed = false;
/*
* Find the rule tuple to change.
*/
pg_rewrite_desc = heap_open(RewriteRelationId, RowExclusiveLock);
ruletup = SearchSysCacheCopy(RULERELNAME,
ObjectIdGetDatum(owningRel),
PointerGetDatum(rulename),
0, 0);
if (!HeapTupleIsValid(ruletup))
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("rule \"%s\" for relation \"%s\" does not exist",
rulename, get_rel_name(owningRel))));
/*
* Verify that the user has appropriate permissions.
*/
eventRelationOid = ((Form_pg_rewrite) GETSTRUCT(ruletup))->ev_class;
Assert(eventRelationOid == owningRel);
if (!pg_class_ownercheck(eventRelationOid, GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_CLASS,
get_rel_name(eventRelationOid));
/*
* Change ev_enabled if it is different from the desired new state.
*/
if (DatumGetChar(((Form_pg_rewrite) GETSTRUCT(ruletup))->ev_enabled) !=
fires_when)
{
((Form_pg_rewrite) GETSTRUCT(ruletup))->ev_enabled =
CharGetDatum(fires_when);
simple_heap_update(pg_rewrite_desc, &ruletup->t_self, ruletup);
/* keep system catalog indexes current */
CatalogUpdateIndexes(pg_rewrite_desc, ruletup);
changed = true;
}
heap_freetuple(ruletup);
heap_close(pg_rewrite_desc, RowExclusiveLock);
/*
* If we changed anything, broadcast a SI inval message to force each
* backend (including our own!) to rebuild relation's relcache entry.
* Otherwise they will fail to apply the change promptly.
*/
if (changed)
CacheInvalidateRelcache(rel);
}
/*
* Rename an existing rewrite rule.
*

27
src/backend/rewrite/rewriteHandler.c
Unescape View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/rewrite/rewriteHandler.c,v 1.172 2007/03/17 00:11:04 tgl Exp $
* $PostgreSQL: pgsql/src/backend/rewrite/rewriteHandler.c,v 1.173 2007/03/19 23:38:29 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@ -21,10 +21,12 @@
#include "parser/parse_coerce.h"
#include "parser/parse_expr.h"
#include "parser/parsetree.h"
#include "rewrite/rewriteDefine.h"
#include "rewrite/rewriteHandler.h"
#include "rewrite/rewriteManip.h"
#include "utils/builtins.h"
#include "utils/lsyscache.h"
#include "commands/trigger.h"
/* We use a list of these to detect recursion in RewriteQuery */
@ -1035,6 +1037,29 @@ matchLocks(CmdType event,
{
RewriteRule *oneLock = rulelocks->rules[i];
/*
* Suppress ON INSERT/UPDATE/DELETE rules that are disabled
* or configured to not fire during the current sessions
* replication role. ON SELECT rules will always be applied
* in order to keep views working even in LOCAL or REPLICA
* role.
*/
if (oneLock->event != CMD_SELECT)
{
if (SessionReplicationRole == SESSION_REPLICATION_ROLE_REPLICA)
{
if (oneLock->enabled == RULE_FIRES_ON_ORIGIN ||
oneLock->enabled == RULE_DISABLED)
continue;
}
else /* ORIGIN or LOCAL ROLE */
{
if (oneLock->enabled == RULE_FIRES_ON_REPLICA ||
oneLock->enabled == RULE_DISABLED)
continue;
}
}
if (oneLock->event == event)
{
if (parsetree->commandType != CMD_SELECT ||

13
src/backend/utils/cache/plancache.c vendored
Unescape View File

@ -33,7 +33,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/cache/plancache.c,v 1.2 2007/03/15 23:12:06 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/cache/plancache.c,v 1.3 2007/03/19 23:38:29 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@ -860,3 +860,14 @@ InvalRelid(Oid relid, LOCKMODE lockmode, InvalRelidContext *context)
if (relid == context->inval_relid)
context->plan->dead = true;
}
/*
* HaveCachedPlans
* Check if the plancache has stored any plans at all.
*/
bool
HaveCachedPlans(void)
{
return (cached_plans_list != NIL);
}

3
src/backend/utils/cache/relcache.c vendored
Unescape View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/cache/relcache.c,v 1.257 2007/03/03 20:08:41 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/cache/relcache.c,v 1.258 2007/03/19 23:38:29 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@ -651,6 +651,7 @@ RelationBuildRuleLock(Relation relation)
rule->event = rewrite_form->ev_type - '0';
rule->attrno = rewrite_form->ev_attr;
rule->enabled = rewrite_form->ev_enabled;
rule->isInstead = rewrite_form->is_instead;
/*

44
src/backend/utils/misc/guc.c
Unescape View File

@ -10,7 +10,7 @@
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.382 2007/03/13 14:32:25 petere Exp $
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.383 2007/03/19 23:38:30 wieck Exp $
*
*--------------------------------------------------------------------
*/
@ -34,6 +34,7 @@
#include "commands/async.h"
#include "commands/vacuum.h"
#include "commands/variable.h"
#include "commands/trigger.h"
#include "funcapi.h"
#include "libpq/auth.h"
#include "libpq/pqformat.h"
@ -59,6 +60,7 @@
#include "utils/guc_tables.h"
#include "utils/memutils.h"
#include "utils/pg_locale.h"
#include "utils/plancache.h"
#include "utils/ps_status.h"
#include "utils/tzparser.h"
#include "utils/xml.h"
@ -124,6 +126,8 @@ static const char *assign_syslog_ident(const char *ident,
static const char *assign_defaultxactisolevel(const char *newval, bool doit,
GucSource source);
static const char *assign_session_replication_role(const char *newval, bool doit,
GucSource source);
static const char *assign_log_min_messages(const char *newval, bool doit,
GucSource source);
static const char *assign_client_min_messages(const char *newval,
@ -226,6 +230,7 @@ static char *backslash_quote_string;
static char *client_encoding_string;
static char *datestyle_string;
static char *default_iso_level_string;
static char *session_replication_role_string;
static char *locale_collate;
static char *locale_ctype;
static char *regex_flavor_string;
@ -1928,6 +1933,16 @@ static struct config_string ConfigureNamesString[] =
"read committed", assign_defaultxactisolevel, NULL
},
{
{"session_replication_role", PGC_SUSET, CLIENT_CONN_STATEMENT,
gettext_noop("Sets the sessions behaviour for triggers and rewrite rules."),
gettext_noop("Each session can be either"
" \"origin\", \"replica\" or \"local\".")
},
&session_replication_role_string,
"origin", assign_session_replication_role, NULL
},
{
{"dynamic_library_path", PGC_SUSET, CLIENT_CONN_OTHER,
gettext_noop("Sets the path for dynamically loadable modules."),
@ -6115,6 +6130,33 @@ assign_defaultxactisolevel(const char *newval, bool doit, GucSource source)
return newval;
}
static const char *
assign_session_replication_role(const char *newval, bool doit, GucSource source)
{
if (HaveCachedPlans())
elog(ERROR, "session_replication_role cannot be changed "
"after prepared plans have been cached");
if (pg_strcasecmp(newval, "origin") == 0)
{
if (doit)
SessionReplicationRole = SESSION_REPLICATION_ROLE_ORIGIN;
}
else if (pg_strcasecmp(newval, "replica") == 0)
{
if (doit)
SessionReplicationRole = SESSION_REPLICATION_ROLE_REPLICA;
}
else if (pg_strcasecmp(newval, "local") == 0)
{
if (doit)
SessionReplicationRole = SESSION_REPLICATION_ROLE_LOCAL;
}
else
return NULL;
return newval;
}
static const char *
assign_log_min_messages(const char *newval,
bool doit, GucSource source)

1
src/backend/utils/misc/postgresql.conf.sample
Unescape View File

@ -408,6 +408,7 @@
#default_transaction_isolation = 'read committed'
#default_transaction_read_only = off
#statement_timeout = 0 # 0 is disabled
#session_replication_role = "origin"
#vacuum_freeze_min_age = 100000000
#xmlbinary = 'base64'
#xmloption = 'content'

71
src/bin/pg_dump/pg_dump.c
Unescape View File

@ -12,7 +12,7 @@
* by PostgreSQL
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/bin/pg_dump/pg_dump.c,v 1.460 2007/02/14 01:58:57 tgl Exp $
* $PostgreSQL: pgsql/src/bin/pg_dump/pg_dump.c,v 1.461 2007/03/19 23:38:30 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@ -3699,15 +3699,26 @@ getRules(int *numRules)
int i_ruletable;
int i_ev_type;
int i_is_instead;
int i_ev_enabled;
/* Make sure we are in proper schema */
selectSourceSchema("pg_catalog");
if (g_fout->remoteVersion >= 70100)
if (g_fout->remoteVersion >= 80300)
{
appendPQExpBuffer(query, "SELECT "
"tableoid, oid, rulename, "
"ev_class as ruletable, ev_type, is_instead "
"ev_class as ruletable, ev_type, is_instead, "
"ev_enabled "
"FROM pg_rewrite "
"ORDER BY oid");
}
else if (g_fout->remoteVersion >= 70100)
{
appendPQExpBuffer(query, "SELECT "
"tableoid, oid, rulename, "
"ev_class as ruletable, ev_type, is_instead, "
"'O'::char as ev_enabled "
"FROM pg_rewrite "
"ORDER BY oid");
}
@ -3716,7 +3727,8 @@ getRules(int *numRules)
appendPQExpBuffer(query, "SELECT "
"(SELECT oid FROM pg_class WHERE relname = 'pg_rewrite') AS tableoid, "
"oid, rulename, "
"ev_class as ruletable, ev_type, is_instead "
"ev_class as ruletable, ev_type, is_instead, "
"'O'::char as ev_enabled "
"FROM pg_rewrite "
"ORDER BY oid");
}
@ -3736,6 +3748,7 @@ getRules(int *numRules)
i_ruletable = PQfnumber(res, "ruletable");
i_ev_type = PQfnumber(res, "ev_type");
i_is_instead = PQfnumber(res, "is_instead");
i_ev_enabled = PQfnumber(res, "ev_enabled");
for (i = 0; i < ntups; i++)
{
@ -3759,6 +3772,7 @@ getRules(int *numRules)
ruleinfo[i].dobj.dump = ruleinfo[i].ruletable->dobj.dump;
ruleinfo[i].ev_type = *(PQgetvalue(res, i, i_ev_type));
ruleinfo[i].is_instead = *(PQgetvalue(res, i, i_is_instead)) == 't';
ruleinfo[i].ev_enabled = *(PQgetvalue(res, i, i_ev_enabled));
if (ruleinfo[i].ruletable)
{
/*
@ -3956,7 +3970,7 @@ getTriggers(TableInfo tblinfo[], int numTables)
tginfo[j].tgnargs = atoi(PQgetvalue(res, j, i_tgnargs));
tginfo[j].tgargs = strdup(PQgetvalue(res, j, i_tgargs));
tginfo[j].tgisconstraint = *(PQgetvalue(res, j, i_tgisconstraint)) == 't';
tginfo[j].tgenabled = *(PQgetvalue(res, j, i_tgenabled)) == 't';
tginfo[j].tgenabled = *(PQgetvalue(res, j, i_tgenabled));
tginfo[j].tgdeferrable = *(PQgetvalue(res, j, i_tgdeferrable)) == 't';
tginfo[j].tginitdeferred = *(PQgetvalue(res, j, i_tginitdeferred)) == 't';
@ -8824,11 +8838,27 @@ dumpTrigger(Archive *fout, TriggerInfo *tginfo)
}
appendPQExpBuffer(query, ");\n");
if (!tginfo->tgenabled)
if (tginfo->tgenabled != 't' && tginfo->tgenabled != 'O')
{
appendPQExpBuffer(query, "\nALTER TABLE %s ",
fmtId(tbinfo->dobj.name));
appendPQExpBuffer(query, "DISABLE TRIGGER %s;\n",
switch (tginfo->tgenabled)
{
case 'D':
case 'f':
appendPQExpBuffer(query, "DISABLE");
break;
case 'A':
appendPQExpBuffer(query, "ENABLE ALWAYS");
break;
case 'R':
appendPQExpBuffer(query, "ENABLE REPLICA");
break;
default:
appendPQExpBuffer(query, "ENABLE");
break;
}
appendPQExpBuffer(query, " TRIGGER %s;\n",
fmtId(tginfo->dobj.name));
}
@ -8914,6 +8944,33 @@ dumpRule(Archive *fout, RuleInfo *rinfo)
printfPQExpBuffer(cmd, "%s\n", PQgetvalue(res, 0, 0));
/*
* Add the command to alter the rules replication firing semantics
* if it differs from the default.
*/
if (rinfo->ev_enabled != 'O')
{
appendPQExpBuffer(cmd, "ALTER TABLE %s.",
fmtId(tbinfo->dobj.namespace->dobj.name));
appendPQExpBuffer(cmd, "%s ",
fmtId(tbinfo->dobj.name));
switch (rinfo->ev_enabled)
{
case 'A':
appendPQExpBuffer(cmd, "ENABLE ALWAYS RULE %s;\n",
fmtId(rinfo->dobj.name));
break;
case 'R':
appendPQExpBuffer(cmd, "ENABLE REPLICA RULE %s;\n",
fmtId(rinfo->dobj.name));
break;
case 'D':
appendPQExpBuffer(cmd, "DISABLE RULE %s;\n",
fmtId(rinfo->dobj.name));
break;
}
}
/*
* DROP must be fully qualified in case same name appears in pg_catalog
*/

5
src/bin/pg_dump/pg_dump.h
Unescape View File

@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/bin/pg_dump/pg_dump.h,v 1.133 2007/02/19 15:05:06 mha Exp $
* $PostgreSQL: pgsql/src/bin/pg_dump/pg_dump.h,v 1.134 2007/03/19 23:38:30 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@ -314,6 +314,7 @@ typedef struct _ruleInfo
TableInfo *ruletable; /* link to table the rule is for */
char ev_type;
bool is_instead;
char ev_enabled;
bool separate; /* TRUE if must dump as separate item */
/* separate is always true for non-ON SELECT rules */
} RuleInfo;
@ -330,7 +331,7 @@ typedef struct _triggerInfo
char *tgconstrname;
Oid tgconstrrelid;
char *tgconstrrelname;
bool tgenabled;
char tgenabled;
bool tgdeferrable;
bool tginitdeferred;
} TriggerInfo;

227
src/bin/psql/describe.c
Unescape View File

@ -3,7 +3,7 @@
*
* Copyright (c) 2000-2007, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/bin/psql/describe.c,v 1.154 2007/03/18 16:50:44 neilc Exp $
* $PostgreSQL: pgsql/src/bin/psql/describe.c,v 1.155 2007/03/19 23:38:31 wieck Exp $
*/
#include "postgres_fe.h"
#include "describe.h"
@ -1055,14 +1055,12 @@ describeOneTableDetails(const char *schemaname,
*result3 = NULL,
*result4 = NULL,
*result5 = NULL,
*result6 = NULL,
*result7 = NULL;
*result6 = NULL;
int check_count = 0,
index_count = 0,
foreignkey_count = 0,
rule_count = 0,
trigger_count = 0,
disabled_trigger_count = 0,
inherits_count = 0;
int count_footers = 0;
@ -1105,11 +1103,24 @@ describeOneTableDetails(const char *schemaname,
/* count rules */
if (tableinfo.hasrules)
{
printfPQExpBuffer(&buf,
"SELECT r.rulename, trim(trailing ';' from pg_catalog.pg_get_ruledef(r.oid, true))\n"
if (pset.sversion < 80300)
{
printfPQExpBuffer(&buf,
"SELECT r.rulename, trim(trailing ';' from pg_catalog.pg_get_ruledef(r.oid, true)), "
"'O'::char AS ev_enabled\n"
"FROM pg_catalog.pg_rewrite r\n"
"WHERE r.ev_class = '%s' ORDER BY 1",
oid);
}
else
{
printfPQExpBuffer(&buf,
"SELECT r.rulename, trim(trailing ';' from pg_catalog.pg_get_ruledef(r.oid, true)), "
"ev_enabled\n"
"FROM pg_catalog.pg_rewrite r\n"
"WHERE r.ev_class = '%s' ORDER BY 1",
oid);
}
result3 = PSQLexec(buf.data, false);
if (!result3)
{
@ -1125,10 +1136,10 @@ describeOneTableDetails(const char *schemaname,
if (tableinfo.triggers)
{
printfPQExpBuffer(&buf,
"SELECT t.tgname, pg_catalog.pg_get_triggerdef(t.oid)\n"
"SELECT t.tgname, pg_catalog.pg_get_triggerdef(t.oid), "
"t.tgenabled\n"
"FROM pg_catalog.pg_trigger t\n"
"WHERE t.tgrelid = '%s' "
"AND t.tgenabled "
"AND t.tgconstraint = 0\n"
"ORDER BY 1",
oid);
@ -1142,27 +1153,6 @@ describeOneTableDetails(const char *schemaname,
}
else
trigger_count = PQntuples(result4);
/* acquire disabled triggers as a separate list */
printfPQExpBuffer(&buf,
"SELECT t.tgname, pg_catalog.pg_get_triggerdef(t.oid)\n"
"FROM pg_catalog.pg_trigger t\n"
"WHERE t.tgrelid = '%s' "
"AND NOT t.tgenabled "
"AND t.tgconstraint = 0\n"
"ORDER BY 1",
oid);
result7 = PSQLexec(buf.data, false);
if (!result7)
{
PQclear(result1);
PQclear(result2);
PQclear(result3);
PQclear(result4);
goto error_return;
}
else
disabled_trigger_count = PQntuples(result7);
}
/* count foreign-key constraints (there are none if no triggers) */
@ -1181,7 +1171,6 @@ describeOneTableDetails(const char *schemaname,
PQclear(result2);
PQclear(result3);
PQclear(result4);
PQclear(result7);
goto error_return;
}
else
@ -1199,7 +1188,6 @@ describeOneTableDetails(const char *schemaname,
PQclear(result3);
PQclear(result4);
PQclear(result5);
PQclear(result7);
goto error_return;
}
else
@ -1297,63 +1285,143 @@ describeOneTableDetails(const char *schemaname,
/* print rules */
if (rule_count > 0)
{
printfPQExpBuffer(&buf, _("Rules:"));
footers[count_footers++] = pg_strdup(buf.data);
for (i = 0; i < rule_count; i++)
{
const char *ruledef;
/* Everything after "CREATE RULE" is echoed verbatim */
ruledef = PQgetvalue(result3, i, 1);
ruledef += 12;
bool have_heading;
int category;
printfPQExpBuffer(&buf, " %s", ruledef);
for (category = 0; category < 4; category++)
{
have_heading = false;
footers[count_footers++] = pg_strdup(buf.data);
for (i = 0; i < rule_count; i++)
{
const char *ruledef;
bool list_rule = false;
switch (category)
{
case 0:
if (*PQgetvalue(result3, i, 2) == 'O')
list_rule = true;
break;
case 1:
if (*PQgetvalue(result3, i, 2) == 'D')
list_rule = true;
break;
case 2:
if (*PQgetvalue(result3, i, 2) == 'A')
list_rule = true;
break;
case 3:
if (*PQgetvalue(result3, i, 2) == 'R')
list_rule = true;
break;
}
if (!list_rule)
continue;
if (!have_heading)
{
switch (category)
{
case 0:
printfPQExpBuffer(&buf, _("Rules:"));
break;
case 1:
printfPQExpBuffer(&buf, _("Disabled Rules:"));
break;
case 2:
printfPQExpBuffer(&buf, _("Rules firing always:"));
break;
case 3:
printfPQExpBuffer(&buf, _("Rules firing on replica only:"));
break;
}
footers[count_footers++] = pg_strdup(buf.data);
have_heading = true;
}
/* Everything after "CREATE RULE" is echoed verbatim */
ruledef = PQgetvalue(result3, i, 1);
ruledef += 12;
printfPQExpBuffer(&buf, " %s", ruledef);
footers[count_footers++] = pg_strdup(buf.data);
}
}
}
/* print triggers */
if (trigger_count > 0)
{
printfPQExpBuffer(&buf, _("Triggers:"));
footers[count_footers++] = pg_strdup(buf.data);
for (i = 0; i < trigger_count; i++)
{
const char *tgdef;
const char *usingpos;
/* Everything after "TRIGGER" is echoed verbatim */
tgdef = PQgetvalue(result4, i, 1);
usingpos = strstr(tgdef, " TRIGGER ");
if (usingpos)
tgdef = usingpos + 9;
printfPQExpBuffer(&buf, " %s", tgdef);
footers[count_footers++] = pg_strdup(buf.data);
}
}
/* print disabled triggers */
if (disabled_trigger_count > 0)
{
printfPQExpBuffer(&buf, _("Disabled triggers:"));
footers[count_footers++] = pg_strdup(buf.data);
for (i = 0; i < disabled_trigger_count; i++)
bool have_heading;
int category;
/* split the output into 4 different categories.
* Enabled triggers, disabled triggers and the two
* special ALWAYS and REPLICA configurations.
*/
for (category = 0; category < 4; category++)
{
const char *tgdef;
const char *usingpos;
/* Everything after "TRIGGER" is echoed verbatim */
tgdef = PQgetvalue(result7, i, 1);
usingpos = strstr(tgdef, " TRIGGER ");
if (usingpos)
tgdef = usingpos + 9;
printfPQExpBuffer(&buf, " %s", tgdef);
footers[count_footers++] = pg_strdup(buf.data);
have_heading = false;
for (i = 0; i < trigger_count; i++)
{
bool list_trigger;
const char *tgdef;
const char *usingpos;
const char *tgenabled;
/* Check if this trigger falls into the current category */
tgenabled = PQgetvalue(result4, i, 2);
list_trigger = false;
switch (category)
{
case 0: if (*tgenabled == 'O' || *tgenabled == 't')
list_trigger = true;
break;
case 1: if (*tgenabled == 'D' || *tgenabled == 'f')
list_trigger = true;
break;
case 2: if (*tgenabled == 'A')
list_trigger = true;
break;
case 3: if (*tgenabled == 'R')
list_trigger = true;
break;
}
if (list_trigger == false)
continue;
/* Print the category heading once */
if (have_heading == false)
{
switch (category)
{
case 0:
printfPQExpBuffer(&buf, _("Triggers:"));
break;
case 1:
printfPQExpBuffer(&buf, _("Disabled Triggers:"));
break;
case 2:
printfPQExpBuffer(&buf, _("Triggers firing always:"));
break;
case 3:
printfPQExpBuffer(&buf, _("Triggers firing on replica only:"));
break;
}
footers[count_footers++] = pg_strdup(buf.data);
have_heading = true;
}
/* Everything after "TRIGGER" is echoed verbatim */
tgdef = PQgetvalue(result4, i, 1);
usingpos = strstr(tgdef, " TRIGGER ");
if (usingpos)
tgdef = usingpos + 9;
printfPQExpBuffer(&buf, " %s", tgdef);
footers[count_footers++] = pg_strdup(buf.data);
}
}
}
@ -1392,7 +1460,6 @@ describeOneTableDetails(const char *schemaname,
PQclear(result4);
PQclear(result5);
PQclear(result6);
PQclear(result7);
}
printTable(title.data, headers,

12
src/include/catalog/pg_rewrite.h
Unescape View File

@ -11,7 +11,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/catalog/pg_rewrite.h,v 1.27 2007/01/05 22:19:53 momjian Exp $
* $PostgreSQL: pgsql/src/include/catalog/pg_rewrite.h,v 1.28 2007/03/19 23:38:31 wieck Exp $
*
* NOTES
* the genbki.sh script reads this file and generates .bki
@ -42,6 +42,7 @@ CATALOG(pg_rewrite,2618)
Oid ev_class;
int2 ev_attr;
char ev_type;
char ev_enabled;
bool is_instead;
/* NB: remaining fields must be accessed via heap_getattr */
@ -60,13 +61,14 @@ typedef FormData_pg_rewrite *Form_pg_rewrite;
* compiler constants for pg_rewrite
* ----------------
*/
#define Natts_pg_rewrite 7
#define Natts_pg_rewrite 8
#define Anum_pg_rewrite_rulename 1
#define Anum_pg_rewrite_ev_class 2
#define Anum_pg_rewrite_ev_attr 3
#define Anum_pg_rewrite_ev_type 4
#define Anum_pg_rewrite_is_instead 5
#define Anum_pg_rewrite_ev_qual 6
#define Anum_pg_rewrite_ev_action 7
#define Anum_pg_rewrite_ev_enabled 5
#define Anum_pg_rewrite_is_instead 6
#define Anum_pg_rewrite_ev_qual 7
#define Anum_pg_rewrite_ev_action 8
#endif /* PG_REWRITE_H */

5
src/include/catalog/pg_trigger.h
Unescape View File

@ -8,7 +8,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/catalog/pg_trigger.h,v 1.27 2007/02/14 01:58:58 tgl Exp $
* $PostgreSQL: pgsql/src/include/catalog/pg_trigger.h,v 1.28 2007/03/19 23:38:31 wieck Exp $
*
* NOTES
* the genbki.sh script reads this file and generates .bki
@ -46,7 +46,8 @@ CATALOG(pg_trigger,2620)
Oid tgfoid; /* OID of function to be called */
int2 tgtype; /* BEFORE/AFTER UPDATE/DELETE/INSERT
* ROW/STATEMENT; see below */
bool tgenabled; /* trigger is enabled/disabled */
char tgenabled; /* trigger's firing configuration
* WRT session_replication_role */
bool tgisconstraint; /* trigger is a constraint trigger */
NameData tgconstrname; /* constraint name */
Oid tgconstrrelid; /* constraint's FROM table, if any */

16
src/include/commands/trigger.h
Unescape View File

@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/commands/trigger.h,v 1.61 2007/02/14 01:58:58 tgl Exp $
* $PostgreSQL: pgsql/src/include/commands/trigger.h,v 1.62 2007/03/19 23:38:31 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@ -78,6 +78,18 @@ typedef struct TriggerData
#define TRIGGER_FIRED_AFTER(event) \
(!TRIGGER_FIRED_BEFORE (event))
/*
* Definitions for the replication role based firing.
*/
#define SESSION_REPLICATION_ROLE_ORIGIN 0
#define SESSION_REPLICATION_ROLE_REPLICA 1
#define SESSION_REPLICATION_ROLE_LOCAL 2
extern int SessionReplicationRole;
#define TRIGGER_FIRES_ON_ORIGIN 'O'
#define TRIGGER_FIRES_ALWAYS 'A'
#define TRIGGER_FIRES_ON_REPLICA 'R'
#define TRIGGER_DISABLED 'D'
extern Oid CreateTrigger(CreateTrigStmt *stmt, Oid constraintOid);
@ -88,7 +100,7 @@ extern void RemoveTriggerById(Oid trigOid);
extern void renametrig(Oid relid, const char *oldname, const char *newname);
extern void EnableDisableTrigger(Relation rel, const char *tgname,
bool enable, bool skip_system);
char fires_when, bool skip_system);
extern void RelationBuildTriggers(Relation relation);

8
src/include/nodes/parsenodes.h
Unescape View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/nodes/parsenodes.h,v 1.342 2007/03/13 00:33:43 tgl Exp $
* $PostgreSQL: pgsql/src/include/nodes/parsenodes.h,v 1.343 2007/03/19 23:38:32 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@ -897,11 +897,17 @@ typedef enum AlterTableType
AT_SetRelOptions, /* SET (...) -- AM specific parameters */
AT_ResetRelOptions, /* RESET (...) -- AM specific parameters */
AT_EnableTrig, /* ENABLE TRIGGER name */
AT_EnableAlwaysTrig, /* ENABLE ALWAYS TRIGGER name */
AT_EnableReplicaTrig, /* ENABLE REPLICA TRIGGER name */
AT_DisableTrig, /* DISABLE TRIGGER name */
AT_EnableTrigAll, /* ENABLE TRIGGER ALL */
AT_DisableTrigAll, /* DISABLE TRIGGER ALL */
AT_EnableTrigUser, /* ENABLE TRIGGER USER */
AT_DisableTrigUser, /* DISABLE TRIGGER USER */
AT_EnableRule, /* ENABLE RULE name */
AT_EnableAlwaysRule, /* ENABLE ALWAYS RULE name */
AT_EnableReplicaRule, /* ENABLE REPLICA RULE name */
AT_DisableRule, /* DISABLE RULE name */
AT_AddInherit, /* INHERIT parent */
AT_DropInherit /* NO INHERIT parent */
} AlterTableType;

3
src/include/rewrite/prs2lock.h
Unescape View File

@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/rewrite/prs2lock.h,v 1.22 2007/01/05 22:19:57 momjian Exp $
* $PostgreSQL: pgsql/src/include/rewrite/prs2lock.h,v 1.23 2007/03/19 23:38:32 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@ -28,6 +28,7 @@ typedef struct RewriteRule
AttrNumber attrno;
Node *qual;
List *actions;
char enabled;
bool isInstead;
} RewriteRule;

10
src/include/rewrite/rewriteDefine.h
Unescape View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/rewrite/rewriteDefine.h,v 1.24 2007/03/13 00:33:43 tgl Exp $
* $PostgreSQL: pgsql/src/include/rewrite/rewriteDefine.h,v 1.25 2007/03/19 23:38:32 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@ -16,6 +16,11 @@
#include "nodes/parsenodes.h"
#define RULE_FIRES_ON_ORIGIN 'O'
#define RULE_FIRES_ALWAYS 'A'
#define RULE_FIRES_ON_REPLICA 'R'
#define RULE_DISABLED 'D'
extern void DefineRule(RuleStmt *stmt, const char *queryString);
extern void DefineQueryRewrite(char *rulename,
@ -31,4 +36,7 @@ extern void RenameRewriteRule(Oid owningRel, const char *oldName,
extern void setRuleCheckAsUser(Node *node, Oid userid);
extern void EnableDisableRule(Relation rel, const char *rulename,
char fires_when);
#endif /* REWRITEDEFINE_H */

3
src/include/utils/plancache.h
Unescape View File

@ -8,7 +8,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/plancache.h,v 1.2 2007/03/15 23:12:07 tgl Exp $
* $PostgreSQL: pgsql/src/include/utils/plancache.h,v 1.3 2007/03/19 23:38:32 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@ -102,5 +102,6 @@ extern CachedPlan *RevalidateCachedPlan(CachedPlanSource *plansource,
bool useResOwner);
extern void ReleaseCachedPlan(CachedPlan *plan, bool useResOwner);
extern TupleDesc PlanCacheComputeResultDesc(List *stmt_list);
extern bool HaveCachedPlans(void);
#endif /* PLANCACHE_H */

4
src/include/utils/rel.h
Unescape View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/rel.h,v 1.98 2007/02/27 23:48:10 tgl Exp $
* $PostgreSQL: pgsql/src/include/utils/rel.h,v 1.99 2007/03/19 23:38:32 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@ -53,7 +53,7 @@ typedef struct Trigger
char *tgname;
Oid tgfoid;
int16 tgtype;
bool tgenabled;
char tgenabled;
bool tgisconstraint;
Oid tgconstrrelid;
Oid tgconstraint;

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