Propagate trigger arguments to partitions

We were creating the cloned triggers with an empty list of arguments,
losing the ones that had been specified by the user when creating the
trigger in the partitioned table.  Repair.

This was forgotten in commit 86f575948c77.

Author: Patrick McHardy
Reviewed-by: Tomas Vondra
Discussion: https://postgr.es/m/20190709130027.amr2cavjvo7rdvac@access1.trash.net
Discussion: https://postgr.es/m/15752-123bc90287986de4@postgresql.org

4 files changed, 69 insertions, 2 deletions

diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c
index c62922a1124..5fbe7242c42 100644
--- a/src/backend/commands/tablecmds.c
+++ b/src/backend/commands/tablecmds.c
@@ -15202,6 +15202,7 @@ CloneRowTriggersToPartition(Relation parent, Relation partition)
 		Datum		value;
 		bool		isnull;
 		List	   *cols = NIL;
+		List	   *trigargs = NIL;
 		MemoryContext oldcxt;
 
 		/*
@@ -15266,11 +15267,31 @@ CloneRowTriggersToPartition(Relation parent, Relation partition)
 			}
 		}
 
+		/* Reconstruct trigger arguments list. */
+		if (trigForm->tgnargs > 0)
+		{
+			char	   *p;
+
+			value = heap_getattr(tuple, Anum_pg_trigger_tgargs,
+								 RelationGetDescr(pg_trigger), &isnull);
+			if (isnull)
+				elog(ERROR, "tgargs is null for trigger \"%s\" in partition \"%s\"",
+					 NameStr(trigForm->tgname), RelationGetRelationName(partition));
+
+			p = (char *) VARDATA_ANY(DatumGetByteaPP(value));
+
+			for (int i = 0; i < trigForm->tgnargs; i++)
+			{
+				trigargs = lappend(trigargs, makeString(pstrdup(p)));
+				p += strlen(p) + 1;
+			}
+		}
+
 		trigStmt = makeNode(CreateTrigStmt);
 		trigStmt->trigname = NameStr(trigForm->tgname);
 		trigStmt->relation = NULL;
 		trigStmt->funcname = NULL;	/* passed separately */
-		trigStmt->args = NULL;	/* passed separately */
+		trigStmt->args = trigargs;
 		trigStmt->row = true;
 		trigStmt->timing = trigForm->tgtype & TRIGGER_TYPE_TIMING_MASK;
 		trigStmt->events = trigForm->tgtype & TRIGGER_TYPE_EVENT_MASK;
diff --git a/src/backend/commands/trigger.c b/src/backend/commands/trigger.c
index f6c7a3fefc5..a716827c77a 100644
--- a/src/backend/commands/trigger.c
+++ b/src/backend/commands/trigger.c
@@ -1153,7 +1153,6 @@ CreateTrigger(CreateTrigStmt *stmt, const char *queryString,
 			 */
 			childStmt = (CreateTrigStmt *) copyObject(stmt);
 			childStmt->funcname = NIL;
-			childStmt->args = NIL;
 			childStmt->whenClause = NULL;
 
 			/* If there is a WHEN clause, create a modified copy of it */
diff --git a/src/test/regress/expected/triggers.out b/src/test/regress/expected/triggers.out
index 31dbc9bcfc9..5be0009f00f 100644
--- a/src/test/regress/expected/triggers.out
+++ b/src/test/regress/expected/triggers.out
@@ -2092,6 +2092,30 @@ NOTICE:  trigger zzz on parted_trig_1_1 AFTER INSERT for ROW
 NOTICE:  trigger bbb on parted_trig_2 AFTER INSERT for ROW
 NOTICE:  trigger zzz on parted_trig_2 AFTER INSERT for ROW
 drop table parted_trig;
+-- Verify propagation of trigger arguments to partitions
+create table parted_trig (a int) partition by list (a);
+create table parted_trig1 partition of parted_trig for values in (1);
+create or replace function trigger_notice() returns trigger as $$
+  declare
+    arg1 text = TG_ARGV[0];
+    arg2 integer = TG_ARGV[1];
+  begin
+    raise notice 'trigger % on % % % for % args % %',
+		TG_NAME, TG_TABLE_NAME, TG_WHEN, TG_OP, TG_LEVEL, arg1, arg2;
+    return null;
+  end;
+  $$ language plpgsql;
+create trigger aaa after insert on parted_trig
+   for each row execute procedure trigger_notice('quirky', 1);
+-- Verify propagation of trigger arguments to partitions attached after creating trigger
+create table parted_trig2 partition of parted_trig for values in (2);
+create table parted_trig3 (like parted_trig);
+alter table parted_trig attach partition parted_trig3 for values in (3);
+insert into parted_trig values (1), (2), (3);
+NOTICE:  trigger aaa on parted_trig1 AFTER INSERT for ROW args quirky 1
+NOTICE:  trigger aaa on parted_trig2 AFTER INSERT for ROW args quirky 1
+NOTICE:  trigger aaa on parted_trig3 AFTER INSERT for ROW args quirky 1
+drop table parted_trig;
 -- test irregular partitions (i.e., different column definitions),
 -- including that the WHEN clause works
 create function bark(text) returns bool language plpgsql immutable
diff --git a/src/test/regress/sql/triggers.sql b/src/test/regress/sql/triggers.sql
index 60b3e22c5c2..6376046c5da 100644
--- a/src/test/regress/sql/triggers.sql
+++ b/src/test/regress/sql/triggers.sql
@@ -1465,6 +1465,29 @@ create trigger qqq after insert on parted_trig_1_1 for each row execute procedur
 insert into parted_trig values (50), (1500);
 drop table parted_trig;
 
+-- Verify propagation of trigger arguments to partitions
+create table parted_trig (a int) partition by list (a);
+create table parted_trig1 partition of parted_trig for values in (1);
+create or replace function trigger_notice() returns trigger as $$
+  declare
+    arg1 text = TG_ARGV[0];
+    arg2 integer = TG_ARGV[1];
+  begin
+    raise notice 'trigger % on % % % for % args % %',
+		TG_NAME, TG_TABLE_NAME, TG_WHEN, TG_OP, TG_LEVEL, arg1, arg2;
+    return null;
+  end;
+  $$ language plpgsql;
+create trigger aaa after insert on parted_trig
+   for each row execute procedure trigger_notice('quirky', 1);
+
+-- Verify propagation of trigger arguments to partitions attached after creating trigger
+create table parted_trig2 partition of parted_trig for values in (2);
+create table parted_trig3 (like parted_trig);
+alter table parted_trig attach partition parted_trig3 for values in (3);
+insert into parted_trig values (1), (2), (3);
+drop table parted_trig;
+
 -- test irregular partitions (i.e., different column definitions),
 -- including that the WHEN clause works
 create function bark(text) returns bool language plpgsql immutable