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-rw-r--r--src/backend/commands/tablecmds.c45
-rw-r--r--src/backend/commands/trigger.c110
-rw-r--r--src/backend/parser/gram.y52
-rw-r--r--src/backend/parser/keywords.c4
4 files changed, 205 insertions, 6 deletions
diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c
index f2dd4a5a47d..91f5eaecd95 100644
--- a/src/backend/commands/tablecmds.c
+++ b/src/backend/commands/tablecmds.c
@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/commands/tablecmds.c,v 1.168 2005/08/22 19:40:09 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/commands/tablecmds.c,v 1.169 2005/08/23 22:40:07 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -246,6 +246,8 @@ static void ATExecDropCluster(Relation rel);
static void ATPrepSetTableSpace(AlteredTableInfo *tab, Relation rel,
char *tablespacename);
static void ATExecSetTableSpace(Oid tableOid, Oid newTableSpace);
+static void ATExecEnableDisableTrigger(Relation rel, char *trigname,
+ bool enable, bool skip_system);
static void copy_relation_data(Relation rel, SMgrRelation dst);
static void update_ri_trigger_args(Oid relid,
const char *oldname,
@@ -2005,6 +2007,17 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
ATPrepSetTableSpace(tab, rel, cmd->name);
pass = AT_PASS_MISC; /* doesn't actually matter */
break;
+ case AT_EnableTrig: /* ENABLE TRIGGER variants */
+ case AT_EnableTrigAll:
+ case AT_EnableTrigUser:
+ case AT_DisableTrig: /* DISABLE TRIGGER variants */
+ case AT_DisableTrigAll:
+ case AT_DisableTrigUser:
+ ATSimplePermissions(rel, false);
+ /* These commands never recurse */
+ /* No command-specific prep needed */
+ pass = AT_PASS_MISC;
+ break;
default: /* oops */
elog(ERROR, "unrecognized alter table type: %d",
(int) cmd->subtype);
@@ -2163,6 +2176,24 @@ ATExecCmd(AlteredTableInfo *tab, Relation rel, AlterTableCmd *cmd)
* Nothing to do here; Phase 3 does the work
*/
break;
+ case AT_EnableTrig: /* ENABLE TRIGGER name */
+ ATExecEnableDisableTrigger(rel, cmd->name, true, false);
+ break;
+ case AT_DisableTrig: /* DISABLE TRIGGER name */
+ ATExecEnableDisableTrigger(rel, cmd->name, false, false);
+ break;
+ case AT_EnableTrigAll: /* ENABLE TRIGGER ALL */
+ ATExecEnableDisableTrigger(rel, NULL, true, false);
+ break;
+ case AT_DisableTrigAll: /* DISABLE TRIGGER ALL */
+ ATExecEnableDisableTrigger(rel, NULL, false, false);
+ break;
+ case AT_EnableTrigUser: /* ENABLE TRIGGER USER */
+ ATExecEnableDisableTrigger(rel, NULL, true, true);
+ break;
+ case AT_DisableTrigUser: /* DISABLE TRIGGER USER */
+ ATExecEnableDisableTrigger(rel, NULL, false, true);
+ break;
default: /* oops */
elog(ERROR, "unrecognized alter table type: %d",
(int) cmd->subtype);
@@ -5779,6 +5810,18 @@ copy_relation_data(Relation rel, SMgrRelation dst)
}
/*
+ * ALTER TABLE ENABLE/DISABLE TRIGGER
+ *
+ * We just pass this off to trigger.c.
+ */
+static void
+ATExecEnableDisableTrigger(Relation rel, char *trigname,
+ bool enable, bool skip_system)
+{
+ EnableDisableTrigger(rel, trigname, enable, skip_system);
+}
+
+/*
* ALTER TABLE CREATE TOAST TABLE
*
* Note: this is also invoked from outside this module; in such cases we
diff --git a/src/backend/commands/trigger.c b/src/backend/commands/trigger.c
index 562f676f4b8..b1d2f4ce0db 100644
--- a/src/backend/commands/trigger.c
+++ b/src/backend/commands/trigger.c
@@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/commands/trigger.c,v 1.192 2005/08/20 00:39:54 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/commands/trigger.c,v 1.193 2005/08/23 22:40:08 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -712,6 +712,114 @@ renametrig(Oid relid,
heap_close(targetrel, NoLock);
}
+
+/*
+ * EnableDisableTrigger()
+ *
+ * Called by ALTER TABLE ENABLE/DISABLE TRIGGER
+ * to change 'tgenabled' flag 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
+ * skip_system: if true, skip "system" triggers (constraint triggers)
+ *
+ * Caller should have checked permissions for the table; here we also
+ * enforce that superuser privilege is required to alter the state of
+ * system triggers
+ */
+void
+EnableDisableTrigger(Relation rel, const char *tgname,
+ bool enable, bool skip_system)
+{
+ Relation tgrel;
+ int nkeys;
+ ScanKeyData keys[2];
+ SysScanDesc tgscan;
+ HeapTuple tuple;
+ bool found;
+ bool changed;
+
+ /* Scan the relevant entries in pg_triggers */
+ tgrel = heap_open(TriggerRelationId, RowExclusiveLock);
+
+ ScanKeyInit(&keys[0],
+ Anum_pg_trigger_tgrelid,
+ BTEqualStrategyNumber, F_OIDEQ,
+ ObjectIdGetDatum(RelationGetRelid(rel)));
+ if (tgname)
+ {
+ ScanKeyInit(&keys[1],
+ Anum_pg_trigger_tgname,
+ BTEqualStrategyNumber, F_NAMEEQ,
+ CStringGetDatum(tgname));
+ nkeys = 2;
+ }
+ else
+ nkeys = 1;
+
+ tgscan = systable_beginscan(tgrel, TriggerRelidNameIndexId, true,
+ SnapshotNow, nkeys, keys);
+
+ found = changed = false;
+
+ while (HeapTupleIsValid(tuple = systable_getnext(tgscan)))
+ {
+ Form_pg_trigger oldtrig = (Form_pg_trigger) GETSTRUCT(tuple);
+
+ if (oldtrig->tgisconstraint)
+ {
+ /* system trigger ... ok to process? */
+ if (skip_system)
+ continue;
+ if (!superuser())
+ ereport(ERROR,
+ (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
+ errmsg("permission denied: \"%s\" is a system trigger",
+ NameStr(oldtrig->tgname))));
+ }
+
+ found = true;
+
+ if (oldtrig->tgenabled != enable)
+ {
+ /* 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;
+
+ simple_heap_update(tgrel, &newtup->t_self, newtup);
+
+ /* Keep catalog indexes current */
+ CatalogUpdateIndexes(tgrel, newtup);
+
+ heap_freetuple(newtup);
+
+ changed = true;
+ }
+ }
+
+ systable_endscan(tgscan);
+
+ heap_close(tgrel, RowExclusiveLock);
+
+ if (tgname && !found)
+ ereport(ERROR,
+ (errcode(ERRCODE_UNDEFINED_OBJECT),
+ errmsg("trigger \"%s\" for table \"%s\" does not exist",
+ tgname, RelationGetRelationName(rel))));
+
+ /*
+ * 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);
+}
+
+
/*
* Build trigger data to attach to the given relcache entry.
*
diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y
index 768fb4ada75..0799200bb5d 100644
--- a/src/backend/parser/gram.y
+++ b/src/backend/parser/gram.y
@@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.507 2005/08/01 20:31:09 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.508 2005/08/23 22:40:20 tgl Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@@ -350,9 +350,9 @@ static void doNegateFloat(Value *v);
DATABASE DAY_P DEALLOCATE DEC DECIMAL_P DECLARE DEFAULT DEFAULTS
DEFERRABLE DEFERRED DEFINER DELETE_P DELIMITER DELIMITERS
- DESC DISTINCT DO DOMAIN_P DOUBLE_P DROP
+ DESC DISABLE_P DISTINCT DO DOMAIN_P DOUBLE_P DROP
- EACH ELSE ENCODING ENCRYPTED END_P ESCAPE EXCEPT EXCLUDING
+ EACH ELSE ENABLE_P ENCODING ENCRYPTED END_P ESCAPE EXCEPT EXCLUDING
EXCLUSIVE EXECUTE EXISTS EXPLAIN EXTERNAL EXTRACT
FALSE_P FETCH FIRST_P FLOAT_P FOR FORCE FOREIGN FORWARD
@@ -1415,6 +1415,50 @@ alter_table_cmd:
n->name = NULL;
$$ = (Node *)n;
}
+ /* ALTER TABLE <name> ENABLE TRIGGER <trig> */
+ | ENABLE_P TRIGGER name
+ {
+ AlterTableCmd *n = makeNode(AlterTableCmd);
+ n->subtype = AT_EnableTrig;
+ n->name = $3;
+ $$ = (Node *)n;
+ }
+ /* ALTER TABLE <name> ENABLE TRIGGER ALL */
+ | ENABLE_P TRIGGER ALL
+ {
+ AlterTableCmd *n = makeNode(AlterTableCmd);
+ n->subtype = AT_EnableTrigAll;
+ $$ = (Node *)n;
+ }
+ /* ALTER TABLE <name> ENABLE TRIGGER USER */
+ | ENABLE_P TRIGGER USER
+ {
+ AlterTableCmd *n = makeNode(AlterTableCmd);
+ n->subtype = AT_EnableTrigUser;
+ $$ = (Node *)n;
+ }
+ /* ALTER TABLE <name> DISABLE TRIGGER <trig> */
+ | DISABLE_P TRIGGER name
+ {
+ AlterTableCmd *n = makeNode(AlterTableCmd);
+ n->subtype = AT_DisableTrig;
+ n->name = $3;
+ $$ = (Node *)n;
+ }
+ /* ALTER TABLE <name> DISABLE TRIGGER ALL */
+ | DISABLE_P TRIGGER ALL
+ {
+ AlterTableCmd *n = makeNode(AlterTableCmd);
+ n->subtype = AT_DisableTrigAll;
+ $$ = (Node *)n;
+ }
+ /* ALTER TABLE <name> DISABLE TRIGGER USER */
+ | DISABLE_P TRIGGER USER
+ {
+ AlterTableCmd *n = makeNode(AlterTableCmd);
+ n->subtype = AT_DisableTrigUser;
+ $$ = (Node *)n;
+ }
| alter_rel_cmd
{
$$ = $1;
@@ -8067,10 +8111,12 @@ unreserved_keyword:
| DELETE_P
| DELIMITER
| DELIMITERS
+ | DISABLE_P
| DOMAIN_P
| DOUBLE_P
| DROP
| EACH
+ | ENABLE_P
| ENCODING
| ENCRYPTED
| ESCAPE
diff --git a/src/backend/parser/keywords.c b/src/backend/parser/keywords.c
index 9c09dc5bf3b..6733d1b1240 100644
--- a/src/backend/parser/keywords.c
+++ b/src/backend/parser/keywords.c
@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/parser/keywords.c,v 1.164 2005/07/31 17:19:18 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/parser/keywords.c,v 1.165 2005/08/23 22:40:27 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -117,6 +117,7 @@ static const ScanKeyword ScanKeywords[] = {
{"delimiter", DELIMITER},
{"delimiters", DELIMITERS},
{"desc", DESC},
+ {"disable", DISABLE_P},
{"distinct", DISTINCT},
{"do", DO},
{"domain", DOMAIN_P},
@@ -124,6 +125,7 @@ static const ScanKeyword ScanKeywords[] = {
{"drop", DROP},
{"each", EACH},
{"else", ELSE},
+ {"enable", ENABLE_P},
{"encoding", ENCODING},
{"encrypted", ENCRYPTED},
{"end", END_P},
generated by cgit v1.2.3 (git 2.25.1) at 2025-08-03 16:45:01 +0000