fix a bug related to the auto removal of the record from pathman_config on DROP COLUMN

Author: zilder

expected/pathman_basic.out

@@ -1672,7 +1672,8 @@ NOTICE:  drop cascades to 7 other objects
 /* Test automatic partition creation */
 CREATE TABLE test.range_rel (
 	id	SERIAL PRIMARY KEY,
-	dt	TIMESTAMP NOT NULL);
+	dt	TIMESTAMP NOT NULL,
+	data TEXT);
 SELECT pathman.create_range_partitions('test.range_rel', 'dt', '2015-01-01'::DATE, '10 days'::INTERVAL, 1);
  create_range_partitions 
 -------------------------
@@ -1692,9 +1693,9 @@ EXPLAIN (COSTS OFF) SELECT * FROM test.range_rel WHERE dt = '2014-12-15';
 (3 rows)
 
 SELECT * FROM test.range_rel WHERE dt = '2014-12-15';
- id  |            dt            
------+--------------------------
- 137 | Mon Dec 15 00:00:00 2014
+ id  |            dt            | data 
+-----+--------------------------+------
+ 137 | Mon Dec 15 00:00:00 2014 | 
 (1 row)
 
 EXPLAIN (COSTS OFF) SELECT * FROM test.range_rel WHERE dt = '2015-03-15';
@@ -1706,9 +1707,9 @@ EXPLAIN (COSTS OFF) SELECT * FROM test.range_rel WHERE dt = '2015-03-15';
 (3 rows)
 
 SELECT * FROM test.range_rel WHERE dt = '2015-03-15';
- id |            dt            
-----+--------------------------
- 74 | Sun Mar 15 00:00:00 2015
+ id |            dt            | data 
+----+--------------------------+------
+ 74 | Sun Mar 15 00:00:00 2015 | 
 (1 row)
 
 SELECT pathman.set_auto('test.range_rel', false);
@@ -1726,6 +1727,17 @@ SELECT pathman.set_auto('test.range_rel', true);
 (1 row)
 
 INSERT INTO test.range_rel (dt) VALUES ('2015-06-01');
+/*
+ * Test auto removing record from config on table DROP (but not on column drop
+ * as it used to be before version 1.2)
+ */
+ALTER TABLE test.range_rel DROP COLUMN data;
+SELECT * FROM pathman.pathman_config;
+    partrel     | attname | parttype | range_interval 
+----------------+---------+----------+----------------
+ test.range_rel | dt      |        2 | @ 10 days
+(1 row)
+
 DROP TABLE test.range_rel CASCADE;
 NOTICE:  drop cascades to 20 other objects
 SELECT * FROM pathman.pathman_config;

init.sql

@@ -464,7 +464,7 @@ BEGIN
 	SELECT array_agg(cfg.partrel) INTO relids
 	FROM pg_event_trigger_dropped_objects() AS events
 	JOIN @extschema@.pathman_config AS cfg ON cfg.partrel::oid = events.objid
-	WHERE events.classid = pg_class_oid;
+	WHERE events.classid = pg_class_oid AND events.objsubid = 0;
 
 	/* Cleanup pathman_config */
 	DELETE FROM @extschema@.pathman_config WHERE partrel = ANY(relids);

sql/pathman_basic.sql

@@ -480,7 +480,8 @@ DROP TABLE test.range_rel CASCADE;
 /* Test automatic partition creation */
 CREATE TABLE test.range_rel (
 	id	SERIAL PRIMARY KEY,
-	dt	TIMESTAMP NOT NULL);
+	dt	TIMESTAMP NOT NULL,
+	data TEXT);
 SELECT pathman.create_range_partitions('test.range_rel', 'dt', '2015-01-01'::DATE, '10 days'::INTERVAL, 1);
 INSERT INTO test.range_rel (dt)
 SELECT generate_series('2015-01-01', '2015-04-30', '1 day'::interval);
@@ -498,6 +499,12 @@ INSERT INTO test.range_rel (dt) VALUES ('2015-06-01');
 SELECT pathman.set_auto('test.range_rel', true);
 INSERT INTO test.range_rel (dt) VALUES ('2015-06-01');
 
+/*
+ * Test auto removing record from config on table DROP (but not on column drop
+ * as it used to be before version 1.2)
+ */
+ALTER TABLE test.range_rel DROP COLUMN data;
+SELECT * FROM pathman.pathman_config;
 DROP TABLE test.range_rel CASCADE;
 SELECT * FROM pathman.pathman_config;