1 files changed, 63 insertions, 0 deletions
diff --git a/src/test/regress/sql/alter_table.sql b/src/test/regress/sql/alter_table.sql
index d675579977b..abb3a6aa134 100644
--- a/src/test/regress/sql/alter_table.sql
+++ b/src/test/regress/sql/alter_table.sql
@@ -1393,6 +1393,69 @@ alter table at_partitioned attach partition at_part_2 for values from (1000) to
 alter table at_partitioned alter column b type numeric using b::numeric;
 \d at_part_1
 \d at_part_2
+drop table at_partitioned;
+
+-- Alter column type when no table rewrite is required
+-- Also check that comments are preserved
+create table at_partitioned(id int, name varchar(64), unique (id, name))
+  partition by hash(id);
+comment on constraint at_partitioned_id_name_key on at_partitioned is 'parent constraint';
+comment on index at_partitioned_id_name_key is 'parent index';
+create table at_partitioned_0 partition of at_partitioned
+  for values with (modulus 2, remainder 0);
+comment on constraint at_partitioned_0_id_name_key on at_partitioned_0 is 'child 0 constraint';
+comment on index at_partitioned_0_id_name_key is 'child 0 index';
+create table at_partitioned_1 partition of at_partitioned
+  for values with (modulus 2, remainder 1);
+comment on constraint at_partitioned_1_id_name_key on at_partitioned_1 is 'child 1 constraint';
+comment on index at_partitioned_1_id_name_key is 'child 1 index';
+insert into at_partitioned values(1, 'foo');
+insert into at_partitioned values(3, 'bar');
+
+create temp table old_oids as
+  select relname, oid as oldoid, relfilenode as oldfilenode
+  from pg_class where relname like 'at_partitioned%';
+
+select relname,
+  c.oid = oldoid as orig_oid,
+  case relfilenode
+    when 0 then 'none'
+    when c.oid then 'own'
+    when oldfilenode then 'orig'
+    else 'OTHER'
+    end as storage,
+  obj_description(c.oid, 'pg_class') as desc
+  from pg_class c left join old_oids using (relname)
+  where relname like 'at_partitioned%'
+  order by relname;
+
+select conname, obj_description(oid, 'pg_constraint') as desc
+  from pg_constraint where conname like 'at_partitioned%'
+  order by conname;
+
+alter table at_partitioned alter column name type varchar(127);
+
+-- Note: these tests currently show the wrong behavior for comments :-(
+
+select relname,
+  c.oid = oldoid as orig_oid,
+  case relfilenode
+    when 0 then 'none'
+    when c.oid then 'own'
+    when oldfilenode then 'orig'
+    else 'OTHER'
+    end as storage,
+  obj_description(c.oid, 'pg_class') as desc
+  from pg_class c left join old_oids using (relname)
+  where relname like 'at_partitioned%'
+  order by relname;
+
+select conname, obj_description(oid, 'pg_constraint') as desc
+  from pg_constraint where conname like 'at_partitioned%'
+  order by conname;
+
+-- Don't remove this DROP, it exposes bug #15672
+drop table at_partitioned;
 
 -- disallow recursive containment of row types
 create temp table recur1 (f1 int);