1 files changed, 17 insertions, 0 deletions
diff --git a/src/test/regress/expected/foreign_key.out b/src/test/regress/expected/foreign_key.out
index a97d67e414c..5f4d6f84edf 100644
--- a/src/test/regress/expected/foreign_key.out
+++ b/src/test/regress/expected/foreign_key.out
@@ -1967,6 +1967,23 @@ INSERT INTO fk_notpartitioned_pk VALUES (1600, 601), (1600, 1601);
 ALTER TABLE fk_partitioned_fk ATTACH PARTITION fk_partitioned_fk_2
   FOR VALUES IN (1600);
 -- leave these tables around intentionally
+-- Verify that attaching a table that's referenced by an existing FK
+-- in the parent throws an error
+CREATE TABLE fk_partitioned_pk_6 (a int PRIMARY KEY);
+CREATE TABLE fk_partitioned_fk_6 (a int REFERENCES fk_partitioned_pk_6) PARTITION BY LIST (a);
+ALTER TABLE fk_partitioned_fk_6 ATTACH PARTITION fk_partitioned_pk_6 FOR VALUES IN (1);
+ERROR:  can't attach table "fk_partitioned_pk_6" as a partition which is referenced by foreign key "fk_partitioned_fk_6_a_fkey"
+DROP TABLE fk_partitioned_pk_6, fk_partitioned_fk_6;
+-- This case is similar to above, but the referenced relation is one level
+-- lower in the hierarchy.  This one fails in a different way as the above,
+-- because we don't bother to protect against this case explicitly.  If the
+-- current error stops happening, we'll need to add a better protection.
+CREATE TABLE fk_partitioned_pk_6 (a int PRIMARY KEY) PARTITION BY list (a);
+CREATE TABLE fk_partitioned_pk_61 PARTITION OF fk_partitioned_pk_6 FOR VALUES IN (1);
+CREATE TABLE fk_partitioned_fk_6 (a int REFERENCES fk_partitioned_pk_61) PARTITION BY LIST (a);
+ALTER TABLE fk_partitioned_fk_6 ATTACH PARTITION fk_partitioned_pk_6 FOR VALUES IN (1);
+ERROR:  cannot ALTER TABLE "fk_partitioned_pk_61" because it is being used by active queries in this session
+DROP TABLE fk_partitioned_pk_6, fk_partitioned_fk_6;
 -- test the case when the referenced table is owned by a different user
 create role regress_other_partitioned_fk_owner;
 grant references on fk_notpartitioned_pk to regress_other_partitioned_fk_owner;