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From: Justin Pryzby <[email protected]>
Subject: [PATCH 1/2] psql: fix \d for statement triggers with same name on partition and its parent
Date: Fri, 16 Jul 2021 19:57:00 -0500

This depends on pg_partition_ancestors() to return its partitions in order:
this partition => parent => ... => root.

[email protected]
---
 src/bin/psql/describe.c                |  2 +-
 src/test/regress/expected/triggers.out | 13 +++++++++++++
 src/test/regress/sql/triggers.sql      |  4 ++++
 3 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/bin/psql/describe.c b/src/bin/psql/describe.c
index 42bad9281ed..7ad10fa1a3f 100644
--- a/src/bin/psql/describe.c
+++ b/src/bin/psql/describe.c
@@ -3012,7 +3012,7 @@ describeOneTableDetails(const char *schemaname,
 						   " FROM pg_catalog.pg_trigger AS u, "
 						   "      pg_catalog.pg_partition_ancestors(t.tgrelid) AS a"
 						   " WHERE u.tgname = t.tgname AND u.tgrelid = a.relid"
-						   "       AND u.tgparentid = 0) AS parent" :
+						   "       AND u.tgparentid = 0 LIMIT 1) AS parent" :
 						   "NULL AS parent"),
 						  oid);
 		if (pset.sversion >= 110000)
diff --git a/src/test/regress/expected/triggers.out b/src/test/regress/expected/triggers.out
index 9d529e949f4..44c8cdf206f 100644
--- a/src/test/regress/expected/triggers.out
+++ b/src/test/regress/expected/triggers.out
@@ -2122,6 +2122,19 @@ Triggers:
 alter table trigpart attach partition trigpart3 FOR VALUES FROM (2000) to (3000); -- fail
 ERROR:  trigger "trg1" for relation "trigpart3" already exists
 drop table trigpart3;
+create trigger samename after delete on trigpart execute function trigger_nothing();
+create trigger samename after delete on trigpart1 execute function trigger_nothing();
+\d trigpart1
+             Table "public.trigpart1"
+ Column |  Type   | Collation | Nullable | Default 
+--------+---------+-----------+----------+---------
+ a      | integer |           |          | 
+ b      | integer |           |          | 
+Partition of: trigpart FOR VALUES FROM (0) TO (1000)
+Triggers:
+    samename AFTER DELETE ON trigpart1 FOR EACH STATEMENT EXECUTE FUNCTION trigger_nothing()
+    trg1 AFTER INSERT ON trigpart1 FOR EACH ROW EXECUTE FUNCTION trigger_nothing(), ON TABLE trigpart
+
 drop table trigpart;
 drop function trigger_nothing();
 --
diff --git a/src/test/regress/sql/triggers.sql b/src/test/regress/sql/triggers.sql
index eaab642950b..f644a64ca7d 100644
--- a/src/test/regress/sql/triggers.sql
+++ b/src/test/regress/sql/triggers.sql
@@ -1428,6 +1428,10 @@ create trigger trg1 after insert on trigpart3 for each row execute procedure tri
 alter table trigpart attach partition trigpart3 FOR VALUES FROM (2000) to (3000); -- fail
 drop table trigpart3;
 
+create trigger samename after delete on trigpart execute function trigger_nothing();
+create trigger samename after delete on trigpart1 execute function trigger_nothing();
+\d trigpart1
+
 drop table trigpart;
 drop function trigger_nothing();
 
-- 
2.17.0


--fuRgIt480xB0EInP
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
 filename="0002-psql-Add-newlines-and-spacing-in-trigger-query-for-d.patch"



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