Ashutosh Bapat pointed out [0] that regression tests are missing for the
foreign partition DDL commands.  Attached patch takes care of that.

Thanks,
Amit

[0]
https://www.postgresql.org/message-id/CAFjFpRcrdzBRj0cZ%2BJAQmfSa2Tv8wSEcWAeYtDpV-YZnNna2sA%40mail.gmail.com
>From 236c357b94af848663ed3d0ace10dd22167b7d08 Mon Sep 17 00:00:00 2001
From: amit <amitlangot...@gmail.com>
Date: Tue, 21 Feb 2017 15:06:04 +0900
Subject: [PATCH] Add regression tests foreign partition DDL

Commands like CREATE FOREIGN TABLE .. PARTITION OF, ATTACH PARTITION,
DETACH PARTITION foreign_table didn't get any tests so far.  Per
suggestion from Ashutosh Bapat.
---
 src/test/regress/expected/foreign_data.out | 195 +++++++++++++++++++++++++++++
 src/test/regress/sql/foreign_data.sql      |  71 +++++++++++
 2 files changed, 266 insertions(+)

diff --git a/src/test/regress/expected/foreign_data.out b/src/test/regress/expected/foreign_data.out
index 3a9fb8f558..a0f969f3e5 100644
--- a/src/test/regress/expected/foreign_data.out
+++ b/src/test/regress/expected/foreign_data.out
@@ -1751,6 +1751,201 @@ DETAIL:  user mapping for regress_test_role on server s5 depends on server s5
 HINT:  Use DROP ... CASCADE to drop the dependent objects too.
 DROP OWNED BY regress_test_role2 CASCADE;
 NOTICE:  drop cascades to user mapping for regress_test_role on server s5
+-- Foreign partition DDL stuff
+CREATE TABLE pt2 (
+	c1 integer NOT NULL,
+	c2 text,
+	c3 date
+) PARTITION BY LIST (c1);
+CREATE FOREIGN TABLE pt2_1 PARTITION OF pt2 FOR VALUES IN (1)
+  SERVER s0 OPTIONS (delimiter ',', quote '"', "be quoted" 'value');
+\d+ pt2
+                                    Table "public.pt2"
+ Column |  Type   | Collation | Nullable | Default | Storage  | Stats target | Description 
+--------+---------+-----------+----------+---------+----------+--------------+-------------
+ c1     | integer |           | not null |         | plain    |              | 
+ c2     | text    |           |          |         | extended |              | 
+ c3     | date    |           |          |         | plain    |              | 
+Partition key: LIST (c1)
+Partitions: pt2_1 FOR VALUES IN (1)
+
+\d+ pt2_1
+                                      Foreign table "public.pt2_1"
+ Column |  Type   | Collation | Nullable | Default | FDW Options | Storage  | Stats target | Description 
+--------+---------+-----------+----------+---------+-------------+----------+--------------+-------------
+ c1     | integer |           | not null |         |             | plain    |              | 
+ c2     | text    |           |          |         |             | extended |              | 
+ c3     | date    |           |          |         |             | plain    |              | 
+Partition of: pt2 FOR VALUES IN (1)
+Server: s0
+FDW Options: (delimiter ',', quote '"', "be quoted" 'value')
+
+-- partition cannot have additional columns
+DROP FOREIGN TABLE pt2_1;
+CREATE FOREIGN TABLE pt2_1 (
+	c1 integer NOT NULL,
+	c2 text,
+	c3 date,
+	c4 char
+) SERVER s0 OPTIONS (delimiter ',', quote '"', "be quoted" 'value');
+\d+ pt2_1
+                                         Foreign table "public.pt2_1"
+ Column |     Type     | Collation | Nullable | Default | FDW Options | Storage  | Stats target | Description 
+--------+--------------+-----------+----------+---------+-------------+----------+--------------+-------------
+ c1     | integer      |           | not null |         |             | plain    |              | 
+ c2     | text         |           |          |         |             | extended |              | 
+ c3     | date         |           |          |         |             | plain    |              | 
+ c4     | character(1) |           |          |         |             | extended |              | 
+Server: s0
+FDW Options: (delimiter ',', quote '"', "be quoted" 'value')
+
+ALTER TABLE pt2 ATTACH PARTITION pt2_1 FOR VALUES IN (1);       -- ERROR
+ERROR:  table "pt2_1" contains column "c4" not found in parent "pt2"
+DETAIL:  New partition should contain only the columns present in parent.
+DROP FOREIGN TABLE pt2_1;
+\d+ pt2
+                                    Table "public.pt2"
+ Column |  Type   | Collation | Nullable | Default | Storage  | Stats target | Description 
+--------+---------+-----------+----------+---------+----------+--------------+-------------
+ c1     | integer |           | not null |         | plain    |              | 
+ c2     | text    |           |          |         | extended |              | 
+ c3     | date    |           |          |         | plain    |              | 
+Partition key: LIST (c1)
+
+CREATE FOREIGN TABLE pt2_1 (
+	c1 integer NOT NULL,
+	c2 text,
+	c3 date
+) SERVER s0 OPTIONS (delimiter ',', quote '"', "be quoted" 'value');
+\d+ pt2_1
+                                      Foreign table "public.pt2_1"
+ Column |  Type   | Collation | Nullable | Default | FDW Options | Storage  | Stats target | Description 
+--------+---------+-----------+----------+---------+-------------+----------+--------------+-------------
+ c1     | integer |           | not null |         |             | plain    |              | 
+ c2     | text    |           |          |         |             | extended |              | 
+ c3     | date    |           |          |         |             | plain    |              | 
+Server: s0
+FDW Options: (delimiter ',', quote '"', "be quoted" 'value')
+
+-- no attach partition validation occurs for foreign tables
+ALTER TABLE pt2 ATTACH PARTITION pt2_1 FOR VALUES IN (1);
+\d+ pt2
+                                    Table "public.pt2"
+ Column |  Type   | Collation | Nullable | Default | Storage  | Stats target | Description 
+--------+---------+-----------+----------+---------+----------+--------------+-------------
+ c1     | integer |           | not null |         | plain    |              | 
+ c2     | text    |           |          |         | extended |              | 
+ c3     | date    |           |          |         | plain    |              | 
+Partition key: LIST (c1)
+Partitions: pt2_1 FOR VALUES IN (1)
+
+\d+ pt2_1
+                                      Foreign table "public.pt2_1"
+ Column |  Type   | Collation | Nullable | Default | FDW Options | Storage  | Stats target | Description 
+--------+---------+-----------+----------+---------+-------------+----------+--------------+-------------
+ c1     | integer |           | not null |         |             | plain    |              | 
+ c2     | text    |           |          |         |             | extended |              | 
+ c3     | date    |           |          |         |             | plain    |              | 
+Partition of: pt2 FOR VALUES IN (1)
+Server: s0
+FDW Options: (delimiter ',', quote '"', "be quoted" 'value')
+
+-- cannot add column to a partition
+ALTER TABLE pt2_1 ADD c4 char;
+ERROR:  cannot add column to a partition
+-- ok to have a partition's own constraints though
+ALTER TABLE pt2_1 ALTER c3 SET NOT NULL;
+ALTER TABLE pt2_1 ADD CONSTRAINT p21chk CHECK (c2 <> '');
+\d+ pt2
+                                    Table "public.pt2"
+ Column |  Type   | Collation | Nullable | Default | Storage  | Stats target | Description 
+--------+---------+-----------+----------+---------+----------+--------------+-------------
+ c1     | integer |           | not null |         | plain    |              | 
+ c2     | text    |           |          |         | extended |              | 
+ c3     | date    |           |          |         | plain    |              | 
+Partition key: LIST (c1)
+Partitions: pt2_1 FOR VALUES IN (1)
+
+\d+ pt2_1
+                                      Foreign table "public.pt2_1"
+ Column |  Type   | Collation | Nullable | Default | FDW Options | Storage  | Stats target | Description 
+--------+---------+-----------+----------+---------+-------------+----------+--------------+-------------
+ c1     | integer |           | not null |         |             | plain    |              | 
+ c2     | text    |           |          |         |             | extended |              | 
+ c3     | date    |           | not null |         |             | plain    |              | 
+Partition of: pt2 FOR VALUES IN (1)
+Check constraints:
+    "p21chk" CHECK (c2 <> ''::text)
+Server: s0
+FDW Options: (delimiter ',', quote '"', "be quoted" 'value')
+
+-- cannot drop inherited NOT NULL constraint from a partition
+ALTER TABLE pt2_1 ALTER c1 DROP NOT NULL;
+ERROR:  column "c1" is marked NOT NULL in parent table
+-- partition must have parent's constraints
+ALTER TABLE pt2 DETACH PARTITION pt2_1;
+ALTER TABLE pt2 ALTER c2 SET NOT NULL;
+\d+ pt2
+                                    Table "public.pt2"
+ Column |  Type   | Collation | Nullable | Default | Storage  | Stats target | Description 
+--------+---------+-----------+----------+---------+----------+--------------+-------------
+ c1     | integer |           | not null |         | plain    |              | 
+ c2     | text    |           | not null |         | extended |              | 
+ c3     | date    |           |          |         | plain    |              | 
+Partition key: LIST (c1)
+
+\d+ pt2_1
+                                      Foreign table "public.pt2_1"
+ Column |  Type   | Collation | Nullable | Default | FDW Options | Storage  | Stats target | Description 
+--------+---------+-----------+----------+---------+-------------+----------+--------------+-------------
+ c1     | integer |           | not null |         |             | plain    |              | 
+ c2     | text    |           |          |         |             | extended |              | 
+ c3     | date    |           | not null |         |             | plain    |              | 
+Check constraints:
+    "p21chk" CHECK (c2 <> ''::text)
+Server: s0
+FDW Options: (delimiter ',', quote '"', "be quoted" 'value')
+
+ALTER TABLE pt2 ATTACH PARTITION pt2_1 FOR VALUES IN (1);       -- ERROR
+ERROR:  column "c2" in child table must be marked NOT NULL
+ALTER FOREIGN TABLE pt2_1 ALTER c2 SET NOT NULL;
+ALTER TABLE pt2 ATTACH PARTITION pt2_1 FOR VALUES IN (1);
+ALTER TABLE pt2 DETACH PARTITION pt2_1;
+ALTER TABLE pt2 ADD CONSTRAINT pt2chk1 CHECK (c1 > 0);
+\d+ pt2
+                                    Table "public.pt2"
+ Column |  Type   | Collation | Nullable | Default | Storage  | Stats target | Description 
+--------+---------+-----------+----------+---------+----------+--------------+-------------
+ c1     | integer |           | not null |         | plain    |              | 
+ c2     | text    |           | not null |         | extended |              | 
+ c3     | date    |           |          |         | plain    |              | 
+Partition key: LIST (c1)
+Check constraints:
+    "pt2chk1" CHECK (c1 > 0)
+
+\d+ pt2_1
+                                      Foreign table "public.pt2_1"
+ Column |  Type   | Collation | Nullable | Default | FDW Options | Storage  | Stats target | Description 
+--------+---------+-----------+----------+---------+-------------+----------+--------------+-------------
+ c1     | integer |           | not null |         |             | plain    |              | 
+ c2     | text    |           | not null |         |             | extended |              | 
+ c3     | date    |           | not null |         |             | plain    |              | 
+Check constraints:
+    "p21chk" CHECK (c2 <> ''::text)
+Server: s0
+FDW Options: (delimiter ',', quote '"', "be quoted" 'value')
+
+ALTER TABLE pt2 ATTACH PARTITION pt2_1 FOR VALUES IN (1);       -- ERROR
+ERROR:  child table is missing constraint "pt2chk1"
+ALTER FOREIGN TABLE pt2_1 ADD CONSTRAINT pt2chk1 CHECK (c1 > 0);
+ALTER TABLE pt2 ATTACH PARTITION pt2_1 FOR VALUES IN (1);
+-- TRUNCATE doesn't work on foreign tables, either directly or recursively
+TRUNCATE pt2_1;  -- ERROR
+ERROR:  "pt2_1" is not a table
+TRUNCATE pt2;  -- ERROR
+ERROR:  "pt2_1" is not a table
+DROP FOREIGN TABLE pt2_1;
+DROP TABLE pt2;
 -- Cleanup
 DROP SCHEMA foreign_schema CASCADE;
 DROP ROLE regress_test_role;                                -- ERROR
diff --git a/src/test/regress/sql/foreign_data.sql b/src/test/regress/sql/foreign_data.sql
index 38e1d41a5f..c13d5ffbe9 100644
--- a/src/test/regress/sql/foreign_data.sql
+++ b/src/test/regress/sql/foreign_data.sql
@@ -684,6 +684,77 @@ REASSIGN OWNED BY regress_test_role TO regress_test_role2;
 DROP OWNED BY regress_test_role2;
 DROP OWNED BY regress_test_role2 CASCADE;
 
+-- Foreign partition DDL stuff
+CREATE TABLE pt2 (
+	c1 integer NOT NULL,
+	c2 text,
+	c3 date
+) PARTITION BY LIST (c1);
+CREATE FOREIGN TABLE pt2_1 PARTITION OF pt2 FOR VALUES IN (1)
+  SERVER s0 OPTIONS (delimiter ',', quote '"', "be quoted" 'value');
+\d+ pt2
+\d+ pt2_1
+
+-- partition cannot have additional columns
+DROP FOREIGN TABLE pt2_1;
+CREATE FOREIGN TABLE pt2_1 (
+	c1 integer NOT NULL,
+	c2 text,
+	c3 date,
+	c4 char
+) SERVER s0 OPTIONS (delimiter ',', quote '"', "be quoted" 'value');
+\d+ pt2_1
+ALTER TABLE pt2 ATTACH PARTITION pt2_1 FOR VALUES IN (1);       -- ERROR
+
+DROP FOREIGN TABLE pt2_1;
+\d+ pt2
+CREATE FOREIGN TABLE pt2_1 (
+	c1 integer NOT NULL,
+	c2 text,
+	c3 date
+) SERVER s0 OPTIONS (delimiter ',', quote '"', "be quoted" 'value');
+\d+ pt2_1
+-- no attach partition validation occurs for foreign tables
+ALTER TABLE pt2 ATTACH PARTITION pt2_1 FOR VALUES IN (1);
+\d+ pt2
+\d+ pt2_1
+
+-- cannot add column to a partition
+ALTER TABLE pt2_1 ADD c4 char;
+
+-- ok to have a partition's own constraints though
+ALTER TABLE pt2_1 ALTER c3 SET NOT NULL;
+ALTER TABLE pt2_1 ADD CONSTRAINT p21chk CHECK (c2 <> '');
+\d+ pt2
+\d+ pt2_1
+
+-- cannot drop inherited NOT NULL constraint from a partition
+ALTER TABLE pt2_1 ALTER c1 DROP NOT NULL;
+
+-- partition must have parent's constraints
+ALTER TABLE pt2 DETACH PARTITION pt2_1;
+ALTER TABLE pt2 ALTER c2 SET NOT NULL;
+\d+ pt2
+\d+ pt2_1
+ALTER TABLE pt2 ATTACH PARTITION pt2_1 FOR VALUES IN (1);       -- ERROR
+ALTER FOREIGN TABLE pt2_1 ALTER c2 SET NOT NULL;
+ALTER TABLE pt2 ATTACH PARTITION pt2_1 FOR VALUES IN (1);
+
+ALTER TABLE pt2 DETACH PARTITION pt2_1;
+ALTER TABLE pt2 ADD CONSTRAINT pt2chk1 CHECK (c1 > 0);
+\d+ pt2
+\d+ pt2_1
+ALTER TABLE pt2 ATTACH PARTITION pt2_1 FOR VALUES IN (1);       -- ERROR
+ALTER FOREIGN TABLE pt2_1 ADD CONSTRAINT pt2chk1 CHECK (c1 > 0);
+ALTER TABLE pt2 ATTACH PARTITION pt2_1 FOR VALUES IN (1);
+
+-- TRUNCATE doesn't work on foreign tables, either directly or recursively
+TRUNCATE pt2_1;  -- ERROR
+TRUNCATE pt2;  -- ERROR
+
+DROP FOREIGN TABLE pt2_1;
+DROP TABLE pt2;
+
 -- Cleanup
 DROP SCHEMA foreign_schema CASCADE;
 DROP ROLE regress_test_role;                                -- ERROR
-- 
2.11.0

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