Preserve firing-on state when cloning row triggers to partitions

When triggers are cloned from partitioned tables to their partitions,
the 'tgenabled' flag (origin/replica/always/disable) was not propagated.
Make it so that the flag on the trigger on partition is initially set to
the same value as on the partitioned table.

Add a test case to verify the behavior.

Backpatch to 11, where this appeared in commit 86f575948c.

Author: Álvaro Herrera <alvherre@alvh.no-ip.org>
Reported-by: Justin Pryzby <pryzby@telsasoft.com>
Discussion: https://postgr.es/m/20200930223450.GA14848@telsasoft.com

src/backend/commands/tablecmds.c

@@ -17641,10 +17641,10 @@ CloneRowTriggersToPartition(Relation parent, Relation partition)
 		trigStmt->initdeferred = trigForm->tginitdeferred;
 		trigStmt->constrrel = NULL; /* passed separately */
 
-		CreateTrigger(trigStmt, NULL, RelationGetRelid(partition),
+		CreateTriggerFiringOn(trigStmt, NULL, RelationGetRelid(partition),
-					  trigForm->tgconstrrelid, InvalidOid, InvalidOid,
+							  trigForm->tgconstrrelid, InvalidOid, InvalidOid,
-					  trigForm->tgfoid, trigForm->oid, qual,
+							  trigForm->tgfoid, trigForm->oid, qual,
-					  false, true);
+							  false, true, trigForm->tgenabled);
 
 		MemoryContextSwitchTo(oldcxt);
 		MemoryContextReset(perTupCxt);

src/backend/commands/trigger.c

@@ -151,6 +151,24 @@ CreateTrigger(CreateTrigStmt *stmt, const char *queryString,
 			  Oid relOid, Oid refRelOid, Oid constraintOid, Oid indexOid,
 			  Oid funcoid, Oid parentTriggerOid, Node *whenClause,
 			  bool isInternal, bool in_partition)
+{
+	return
+		CreateTriggerFiringOn(stmt, queryString, relOid, refRelOid,
+							  constraintOid, indexOid, funcoid,
+							  parentTriggerOid, whenClause, isInternal,
+							  in_partition, TRIGGER_FIRES_ON_ORIGIN);
+}
+
+/*
+ * Like the above; additionally the firing condition
+ * (always/origin/replica/disabled) can be specified.
+ */
+ObjectAddress
+CreateTriggerFiringOn(CreateTrigStmt *stmt, const char *queryString,
+					  Oid relOid, Oid refRelOid, Oid constraintOid,
+					  Oid indexOid, Oid funcoid, Oid parentTriggerOid,
+					  Node *whenClause, bool isInternal, bool in_partition,
+					  char trigger_fires_when)
 {
 	int16		tgtype;
 	int			ncolumns;
@@ -848,7 +866,7 @@ CreateTrigger(CreateTrigStmt *stmt, const char *queryString,
 															 CStringGetDatum(trigname));
 	values[Anum_pg_trigger_tgfoid - 1] = ObjectIdGetDatum(funcoid);
 	values[Anum_pg_trigger_tgtype - 1] = Int16GetDatum(tgtype);
-	values[Anum_pg_trigger_tgenabled - 1] = CharGetDatum(TRIGGER_FIRES_ON_ORIGIN);
+	values[Anum_pg_trigger_tgenabled - 1] = trigger_fires_when;
 	values[Anum_pg_trigger_tgisinternal - 1] = BoolGetDatum(isInternal || in_partition);
 	values[Anum_pg_trigger_tgconstrrelid - 1] = ObjectIdGetDatum(constrrelid);
 	values[Anum_pg_trigger_tgconstrindid - 1] = ObjectIdGetDatum(indexOid);
@@ -1195,11 +1213,11 @@ CreateTrigger(CreateTrigStmt *stmt, const char *queryString,
 				map_partition_varattnos((List *) qual, PRS2_NEW_VARNO,
 										childTbl, rel);
 
-			CreateTrigger(childStmt, queryString,
+			CreateTriggerFiringOn(childStmt, queryString,
-						  partdesc->oids[i], refRelOid,
+								  partdesc->oids[i], refRelOid,
-						  InvalidOid, indexOnChild,
+								  InvalidOid, indexOnChild,
-						  funcoid, trigoid, qual,
+								  funcoid, trigoid, qual,
-						  isInternal, true);
+								  isInternal, true, trigger_fires_when);
 
 			table_close(childTbl, NoLock);
 

src/include/commands/trigger.h

@@ -154,6 +154,11 @@ extern ObjectAddress CreateTrigger(CreateTrigStmt *stmt, const char *queryString
 								   Oid relOid, Oid refRelOid, Oid constraintOid, Oid indexOid,
 								   Oid funcoid, Oid parentTriggerOid, Node *whenClause,
 								   bool isInternal, bool in_partition);
+extern ObjectAddress CreateTriggerFiringOn(CreateTrigStmt *stmt, const char *queryString,
+										   Oid relOid, Oid refRelOid, Oid constraintOid,
+										   Oid indexOid, Oid funcoid, Oid parentTriggerOid,
+										   Node *whenClause, bool isInternal, bool in_partition,
+										   char trigger_fires_when);
 
 extern void RemoveTriggerById(Oid trigOid);
 extern Oid	get_trigger_oid(Oid relid, const char *name, bool missing_ok);

src/test/regress/expected/triggers.out

@@ -2661,6 +2661,62 @@ select tgrelid::regclass, tgname, tgenabled from pg_trigger
 (2 rows)
 
 drop table parent, child1;
+-- Verify that firing state propagates correctly on creation, too
+CREATE TABLE trgfire (i int) PARTITION BY RANGE (i);
+CREATE TABLE trgfire1 PARTITION OF trgfire FOR VALUES FROM (1) TO (10);
+CREATE OR REPLACE FUNCTION tgf() RETURNS trigger LANGUAGE plpgsql
+  AS $$ begin raise exception 'except'; end $$;
+CREATE TRIGGER tg AFTER INSERT ON trgfire FOR EACH ROW EXECUTE FUNCTION tgf();
+INSERT INTO trgfire VALUES (1);
+ERROR:  except
+CONTEXT:  PL/pgSQL function tgf() line 1 at RAISE
+ALTER TABLE trgfire DISABLE TRIGGER tg;
+INSERT INTO trgfire VALUES (1);
+CREATE TABLE trgfire2 PARTITION OF trgfire FOR VALUES FROM (10) TO (20);
+INSERT INTO trgfire VALUES (11);
+CREATE TABLE trgfire3 (LIKE trgfire);
+ALTER TABLE trgfire ATTACH PARTITION trgfire3 FOR VALUES FROM (20) TO (30);
+INSERT INTO trgfire VALUES (21);
+CREATE TABLE trgfire4 PARTITION OF trgfire FOR VALUES FROM (30) TO (40) PARTITION BY LIST (i);
+CREATE TABLE trgfire4_30 PARTITION OF trgfire4 FOR VALUES IN (30);
+INSERT INTO trgfire VALUES (30);
+CREATE TABLE trgfire5 (LIKE trgfire) PARTITION BY LIST (i);
+CREATE TABLE trgfire5_40 PARTITION OF trgfire5 FOR VALUES IN (40);
+ALTER TABLE trgfire ATTACH PARTITION trgfire5 FOR VALUES FROM (40) TO (50);
+INSERT INTO trgfire VALUES (40);
+SELECT tgrelid::regclass, tgenabled FROM pg_trigger
+  WHERE tgrelid::regclass IN (SELECT oid from pg_class where relname LIKE 'trgfire%')
+  ORDER BY tgrelid::regclass::text;
+   tgrelid   | tgenabled 
+-------------+-----------
+ trgfire     | D
+ trgfire1    | D
+ trgfire2    | D
+ trgfire3    | D
+ trgfire4    | D
+ trgfire4_30 | D
+ trgfire5    | D
+ trgfire5_40 | D
+(8 rows)
+
+ALTER TABLE trgfire ENABLE TRIGGER tg;
+INSERT INTO trgfire VALUES (1);
+ERROR:  except
+CONTEXT:  PL/pgSQL function tgf() line 1 at RAISE
+INSERT INTO trgfire VALUES (11);
+ERROR:  except
+CONTEXT:  PL/pgSQL function tgf() line 1 at RAISE
+INSERT INTO trgfire VALUES (21);
+ERROR:  except
+CONTEXT:  PL/pgSQL function tgf() line 1 at RAISE
+INSERT INTO trgfire VALUES (30);
+ERROR:  except
+CONTEXT:  PL/pgSQL function tgf() line 1 at RAISE
+INSERT INTO trgfire VALUES (40);
+ERROR:  except
+CONTEXT:  PL/pgSQL function tgf() line 1 at RAISE
+DROP TABLE trgfire;
+DROP FUNCTION tgf();
 --
 -- Test the interaction between transition tables and both kinds of
 -- inheritance.  We'll dump the contents of the transition tables in a

src/test/regress/sql/triggers.sql

@@ -1836,6 +1836,38 @@ select tgrelid::regclass, tgname, tgenabled from pg_trigger
   order by tgrelid::regclass::text;
 drop table parent, child1;
 
+-- Verify that firing state propagates correctly on creation, too
+CREATE TABLE trgfire (i int) PARTITION BY RANGE (i);
+CREATE TABLE trgfire1 PARTITION OF trgfire FOR VALUES FROM (1) TO (10);
+CREATE OR REPLACE FUNCTION tgf() RETURNS trigger LANGUAGE plpgsql
+  AS $$ begin raise exception 'except'; end $$;
+CREATE TRIGGER tg AFTER INSERT ON trgfire FOR EACH ROW EXECUTE FUNCTION tgf();
+INSERT INTO trgfire VALUES (1);
+ALTER TABLE trgfire DISABLE TRIGGER tg;
+INSERT INTO trgfire VALUES (1);
+CREATE TABLE trgfire2 PARTITION OF trgfire FOR VALUES FROM (10) TO (20);
+INSERT INTO trgfire VALUES (11);
+CREATE TABLE trgfire3 (LIKE trgfire);
+ALTER TABLE trgfire ATTACH PARTITION trgfire3 FOR VALUES FROM (20) TO (30);
+INSERT INTO trgfire VALUES (21);
+CREATE TABLE trgfire4 PARTITION OF trgfire FOR VALUES FROM (30) TO (40) PARTITION BY LIST (i);
+CREATE TABLE trgfire4_30 PARTITION OF trgfire4 FOR VALUES IN (30);
+INSERT INTO trgfire VALUES (30);
+CREATE TABLE trgfire5 (LIKE trgfire) PARTITION BY LIST (i);
+CREATE TABLE trgfire5_40 PARTITION OF trgfire5 FOR VALUES IN (40);
+ALTER TABLE trgfire ATTACH PARTITION trgfire5 FOR VALUES FROM (40) TO (50);
+INSERT INTO trgfire VALUES (40);
+SELECT tgrelid::regclass, tgenabled FROM pg_trigger
+  WHERE tgrelid::regclass IN (SELECT oid from pg_class where relname LIKE 'trgfire%')
+  ORDER BY tgrelid::regclass::text;
+ALTER TABLE trgfire ENABLE TRIGGER tg;
+INSERT INTO trgfire VALUES (1);
+INSERT INTO trgfire VALUES (11);
+INSERT INTO trgfire VALUES (21);
+INSERT INTO trgfire VALUES (30);
+INSERT INTO trgfire VALUES (40);
+DROP TABLE trgfire;
+DROP FUNCTION tgf();
 
 --
 -- Test the interaction between transition tables and both kinds of