CREATE SCHEMA single_node;
SET search_path TO single_node;
SET citus.shard_count TO 4;
SET citus.shard_replication_factor TO 1;
SET citus.next_shard_id TO 90630500;
SET citus.replication_model TO 'streaming';
-- adding the coordinator as inactive is disallowed
SELECT 1 FROM master_add_inactive_node('localhost', :master_port, groupid => 0);
ERROR:  coordinator node cannot be added as inactive node
-- idempotently add node to allow this test to run without add_coordinator
SET client_min_messages TO WARNING;
SELECT 1 FROM master_add_node('localhost', :master_port, groupid => 0);
 ?column?
---------------------------------------------------------------------
        1
(1 row)

-- coordinator cannot be disabled
SELECT 1 FROM master_disable_node('localhost', :master_port);
ERROR:  Disabling localhost:xxxxx failed
DETAIL:  cannot change "isactive" field of the coordinator node
RESET client_min_messages;
SELECT 1 FROM master_set_node_property('localhost', :master_port, 'shouldhaveshards', true);
 ?column?
---------------------------------------------------------------------
        1
(1 row)

CREATE TABLE test(x int, y int);
SELECT create_distributed_table('test','x');
 create_distributed_table
---------------------------------------------------------------------

(1 row)

CREATE TYPE new_type AS (n int, m text);
CREATE TABLE test_2(x int, y int, z new_type);
SELECT create_distributed_table('test_2','x');
 create_distributed_table
---------------------------------------------------------------------

(1 row)

CREATE TABLE ref(a int, b int);
SELECT create_reference_table('ref');
 create_reference_table
---------------------------------------------------------------------

(1 row)

CREATE TABLE local(c int, d int);
CREATE TABLE public.another_schema_table(a int);
SELECT create_distributed_table('public.another_schema_table', 'a');
 create_distributed_table
---------------------------------------------------------------------

(1 row)

-- Confirm the basics work
INSERT INTO test VALUES (1, 2), (3, 4), (5, 6), (2, 7), (4, 5);
SELECT * FROM test WHERE x = 1;
 x | y
---------------------------------------------------------------------
 1 | 2
(1 row)

SELECT count(*) FROM test;
 count
---------------------------------------------------------------------
     5
(1 row)

SELECT * FROM test ORDER BY x;
 x | y
---------------------------------------------------------------------
 1 | 2
 2 | 7
 3 | 4
 4 | 5
 5 | 6
(5 rows)

UPDATE test SET y = y + 1 RETURNING *;
 x | y
---------------------------------------------------------------------
 1 | 3
 2 | 8
 3 | 5
 4 | 6
 5 | 7
(5 rows)

WITH cte_1 AS (UPDATE test SET y = y - 1 RETURNING *) SELECT * FROM cte_1 ORDER BY 1,2;
 x | y
---------------------------------------------------------------------
 1 | 2
 2 | 7
 3 | 4
 4 | 5
 5 | 6
(5 rows)

-- we should be able to limit intermediate results
BEGIN;
       SET LOCAL citus.max_intermediate_result_size TO 0;
       WITH cte_1 AS (SELECT * FROM test OFFSET 0) SELECT * FROM cte_1;
ERROR:  the intermediate result size exceeds citus.max_intermediate_result_size (currently 0 kB)
DETAIL:  Citus restricts the size of intermediate results of complex subqueries and CTEs to avoid accidentally pulling large result sets into once place.
HINT:  To run the current query, set citus.max_intermediate_result_size to a higher value or -1 to disable.
ROLLBACK;
-- the first cte (cte_1) does not exceed the limit
-- but the second (cte_2) exceeds, so we error out
BEGIN;
	SET LOCAL citus.max_intermediate_result_size TO '1kB';
	INSERT INTO  test SELECT i,i from generate_series(0,1000)i;
	-- only pulls 1 row, should not hit the limit
	WITH cte_1 AS (SELECT * FROM test LIMIT 1) SELECT count(*) FROM cte_1;
 count
---------------------------------------------------------------------
     1
(1 row)

	-- cte_1 only pulls 1 row, but cte_2 all rows
	WITH cte_1 AS (SELECT * FROM test LIMIT 1),
	     cte_2 AS (SELECT * FROM test OFFSET 0)
	SELECT count(*) FROM cte_1, cte_2;
ERROR:  the intermediate result size exceeds citus.max_intermediate_result_size (currently 1 kB)
DETAIL:  Citus restricts the size of intermediate results of complex subqueries and CTEs to avoid accidentally pulling large result sets into once place.
HINT:  To run the current query, set citus.max_intermediate_result_size to a higher value or -1 to disable.
ROLLBACK;
-- single shard and multi-shard delete
-- inside a transaction block
BEGIN;
	DELETE FROM test WHERE y = 5;
	INSERT INTO test VALUES (4, 5);
	DELETE FROM test WHERE x = 1;
	INSERT INTO test VALUES (1, 2);
COMMIT;
CREATE INDEX single_node_i1 ON test(x);
CREATE INDEX single_node_i2 ON test(x,y);
REINDEX SCHEMA single_node;
-- PG 11 does not support CONCURRENTLY
-- and we do not want to add a new output
-- file just for that. Enable the test
-- once we remove PG_VERSION_11
--REINDEX SCHEMA CONCURRENTLY single_node;
-- keep one of the indexes
-- drop w/wout tx blocks
BEGIN;
	DROP INDEX single_node_i2;
ROLLBACK;
DROP INDEX single_node_i2;
-- change the schema w/wout TX block
BEGIN;
	ALTER TABLE public.another_schema_table SET SCHEMA single_node;
ROLLBACK;
ALTER TABLE public.another_schema_table SET SCHEMA single_node;
BEGIN;
	TRUNCATE test;
	SELECT * FROM test;
 x | y
---------------------------------------------------------------------
(0 rows)

ROLLBACK;
VACUUM test;
VACUUM test, test_2;
VACUUM ref, test;
VACUUM ANALYZE test(x);
ANALYZE ref;
ANALYZE test_2;
VACUUM local;
VACUUM local, ref, test, test_2;
VACUUM FULL test, ref;
BEGIN;
	ALTER TABLE test ADD COLUMN z INT DEFAULT 66;
	SELECT count(*) FROM test WHERE z = 66;
 count
---------------------------------------------------------------------
     5
(1 row)

ROLLBACK;
-- explain analyze should work on a single node
EXPLAIN (COSTS FALSE, ANALYZE TRUE, TIMING FALSE, SUMMARY FALSE)
	SELECT * FROM test;
                             QUERY PLAN
---------------------------------------------------------------------
 Custom Scan (Citus Adaptive) (actual rows=5 loops=1)
   Task Count: 4
   Tuple data received from nodes: 10 bytes
   Tasks Shown: One of 4
   ->  Task
         Tuple data received from node: 4 bytes
         Node: host=localhost port=xxxxx dbname=regression
         ->  Seq Scan on test_90630500 test (actual rows=2 loops=1)
(8 rows)

-- common utility command
SELECT pg_size_pretty(citus_relation_size('test'::regclass));
 pg_size_pretty
---------------------------------------------------------------------
 24 kB
(1 row)

-- basic view queries
CREATE VIEW single_node_view AS
	SELECT count(*) as cnt FROM test t1 JOIN test t2 USING (x);
SELECT * FROM single_node_view;
 cnt
---------------------------------------------------------------------
   5
(1 row)

SELECT * FROM single_node_view, test WHERE test.x = single_node_view.cnt;
 cnt | x | y
---------------------------------------------------------------------
   5 | 5 | 6
(1 row)

-- copy in/out
BEGIN;
	COPY test(x) FROM PROGRAM 'seq 32';
	SELECT count(*) FROM test;
 count
---------------------------------------------------------------------
    37
(1 row)

	COPY (SELECT count(DISTINCT x) FROM test) TO STDOUT;
32
	INSERT INTO test SELECT i,i FROM generate_series(0,100)i;
ROLLBACK;
-- alter table inside a tx block
BEGIN;
	ALTER TABLE test ADD COLUMN z single_node.new_type;
	INSERT INTO test VALUES (99, 100, (1, 'onder')::new_type) RETURNING *;
 x  |  y  |     z
---------------------------------------------------------------------
 99 | 100 | (1,onder)
(1 row)

ROLLBACK;
-- prepared statements with custom types
PREPARE single_node_prepare_p1(int, int, new_type) AS
	INSERT INTO test_2 VALUES ($1, $2, $3);
EXECUTE single_node_prepare_p1(1, 1, (95, 'citus9.5')::new_type);
EXECUTE single_node_prepare_p1(2 ,2, (94, 'citus9.4')::new_type);
EXECUTE single_node_prepare_p1(3 ,2, (93, 'citus9.3')::new_type);
EXECUTE single_node_prepare_p1(4 ,2, (92, 'citus9.2')::new_type);
EXECUTE single_node_prepare_p1(5 ,2, (91, 'citus9.1')::new_type);
EXECUTE single_node_prepare_p1(6 ,2, (90, 'citus9.0')::new_type);
PREPARE use_local_query_cache(int) AS SELECT count(*) FROM test_2 WHERE x =  $1;
EXECUTE use_local_query_cache(1);
 count
---------------------------------------------------------------------
     1
(1 row)

EXECUTE use_local_query_cache(1);
 count
---------------------------------------------------------------------
     1
(1 row)

EXECUTE use_local_query_cache(1);
 count
---------------------------------------------------------------------
     1
(1 row)

EXECUTE use_local_query_cache(1);
 count
---------------------------------------------------------------------
     1
(1 row)

EXECUTE use_local_query_cache(1);
 count
---------------------------------------------------------------------
     1
(1 row)

SET client_min_messages TO DEBUG2;
-- the 6th execution will go through the planner
-- the 7th execution will skip the planner as it uses the cache
EXECUTE use_local_query_cache(1);
DEBUG:  Deferred pruning for a fast-path router query
DEBUG:  Creating router plan
 count
---------------------------------------------------------------------
     1
(1 row)

EXECUTE use_local_query_cache(1);
 count
---------------------------------------------------------------------
     1
(1 row)

RESET client_min_messages;
-- partitioned table should be fine, adding for completeness
CREATE TABLE collections_list (
	key bigint,
	ts timestamptz DEFAULT now(),
	collection_id integer,
	value numeric,
	PRIMARY KEY(key, collection_id)
) PARTITION BY LIST (collection_id );
SELECT create_distributed_table('collections_list', 'key');
 create_distributed_table
---------------------------------------------------------------------

(1 row)

CREATE TABLE collections_list_0
	PARTITION OF collections_list (key, ts, collection_id, value)
	FOR VALUES IN ( 0 );
CREATE TABLE collections_list_1
	PARTITION OF collections_list (key, ts, collection_id, value)
	FOR VALUES IN ( 1 );
INSERT INTO collections_list SELECT i, '2011-01-01', i % 2, i * i FROM generate_series(0, 100) i;
SELECT count(*) FROM collections_list WHERE key < 10 AND collection_id = 1;
 count
---------------------------------------------------------------------
     5
(1 row)

SELECT count(*) FROM collections_list_0 WHERE key < 10 AND collection_id = 1;
 count
---------------------------------------------------------------------
     0
(1 row)

SELECT count(*) FROM collections_list_1 WHERE key = 11;
 count
---------------------------------------------------------------------
     1
(1 row)

ALTER TABLE collections_list DROP COLUMN ts;
SELECT * FROM collections_list, collections_list_0 WHERE collections_list.key=collections_list_0.key  ORDER BY 1 DESC,2 DESC,3 DESC,4 DESC LIMIT 1;
 key | collection_id | value | key | collection_id | value
---------------------------------------------------------------------
 100 |             0 | 10000 | 100 |             0 | 10000
(1 row)

-- make sure that parallel accesses are good
SET citus.force_max_query_parallelization TO ON;
SELECT * FROM test_2 ORDER BY 1 DESC;
 x | y |       z
---------------------------------------------------------------------
 6 | 2 | (90,citus9.0)
 5 | 2 | (91,citus9.1)
 4 | 2 | (92,citus9.2)
 3 | 2 | (93,citus9.3)
 2 | 2 | (94,citus9.4)
 1 | 1 | (95,citus9.5)
(6 rows)

DELETE FROM test_2 WHERE y = 1000 RETURNING *;
 x | y | z
---------------------------------------------------------------------
(0 rows)

RESET citus.force_max_query_parallelization ;
BEGIN;
	INSERT INTO test_2 VALUES (7 ,2, (83, 'citus8.3')::new_type);
	SAVEPOINT s1;
	INSERT INTO test_2 VALUES (9 ,1, (82, 'citus8.2')::new_type);
	SAVEPOINT s2;
	ROLLBACK TO SAVEPOINT s1;
	SELECT * FROM test_2 WHERE z = (83, 'citus8.3')::new_type OR z = (82, 'citus8.2')::new_type;
 x | y |       z
---------------------------------------------------------------------
 7 | 2 | (83,citus8.3)
(1 row)

	RELEASE SAVEPOINT s1;
COMMIT;
SELECT * FROM test_2 WHERE z = (83, 'citus8.3')::new_type OR z = (82, 'citus8.2')::new_type;
 x | y |       z
---------------------------------------------------------------------
 7 | 2 | (83,citus8.3)
(1 row)

-- final query is only intermediate result
-- we want PG 11/12/13 behave consistently, the CTEs should be MATERIALIZED
SET citus.enable_cte_inlining TO FALSE;
WITH cte_1 AS (SELECT * FROM test_2) SELECT * FROM cte_1 ORDER BY 1,2;
 x | y |       z
---------------------------------------------------------------------
 1 | 1 | (95,citus9.5)
 2 | 2 | (94,citus9.4)
 3 | 2 | (93,citus9.3)
 4 | 2 | (92,citus9.2)
 5 | 2 | (91,citus9.1)
 6 | 2 | (90,citus9.0)
 7 | 2 | (83,citus8.3)
(7 rows)

-- final query is router query
WITH cte_1 AS (SELECT * FROM test_2) SELECT * FROM cte_1, test_2 WHERE  test_2.x = cte_1.x AND test_2.x = 7 ORDER BY 1,2;
 x | y |       z       | x | y |       z
---------------------------------------------------------------------
 7 | 2 | (83,citus8.3) | 7 | 2 | (83,citus8.3)
(1 row)

-- final query is a distributed query
WITH cte_1 AS (SELECT * FROM test_2) SELECT * FROM cte_1, test_2 WHERE  test_2.x = cte_1.x AND test_2.y != 2 ORDER BY 1,2;
 x | y |       z       | x | y |       z
---------------------------------------------------------------------
 1 | 1 | (95,citus9.5) | 1 | 1 | (95,citus9.5)
(1 row)

-- query pushdown should work
SELECT
	*
FROM
	(SELECT x, count(*) FROM test_2 GROUP BY x) as foo,
	(SELECT x, count(*) FROM test_2 GROUP BY x) as bar
WHERE
	foo.x = bar.x
ORDER BY 1 DESC, 2 DESC, 3 DESC, 4 DESC
LIMIT 1;
 x | count | x | count
---------------------------------------------------------------------
 7 |     1 | 7 |     1
(1 row)

-- make sure that foreign keys work fine
ALTER TABLE test_2 ADD CONSTRAINT first_pkey PRIMARY KEY (x);
ALTER TABLE test ADD CONSTRAINT foreign_key FOREIGN KEY (x) REFERENCES test_2(x) ON DELETE CASCADE;
-- show that delete on test_2 cascades to test
SELECT * FROM test WHERE x = 5;
 x | y
---------------------------------------------------------------------
 5 | 6
(1 row)

DELETE FROM test_2 WHERE x = 5;
SELECT * FROM test WHERE x = 5;
 x | y
---------------------------------------------------------------------
(0 rows)

INSERT INTO test_2 VALUES (5 ,2, (91, 'citus9.1')::new_type);
INSERT INTO test VALUES (5, 6);
INSERT INTO ref VALUES (1, 2), (5, 6), (7, 8);
SELECT count(*) FROM ref;
 count
---------------------------------------------------------------------
     3
(1 row)

SELECT * FROM ref ORDER BY a;
 a | b
---------------------------------------------------------------------
 1 | 2
 5 | 6
 7 | 8
(3 rows)

SELECT * FROM test, ref WHERE x = a ORDER BY x;
 x | y | a | b
---------------------------------------------------------------------
 1 | 2 | 1 | 2
 5 | 6 | 5 | 6
(2 rows)

INSERT INTO local VALUES (1, 2), (3, 4), (7, 8);
SELECT count(*) FROM local;
 count
---------------------------------------------------------------------
     3
(1 row)

SELECT * FROM local ORDER BY c;
 c | d
---------------------------------------------------------------------
 1 | 2
 3 | 4
 7 | 8
(3 rows)

SELECT * FROM ref, local WHERE a = c ORDER BY a;
 a | b | c | d
---------------------------------------------------------------------
 1 | 2 | 1 | 2
 7 | 8 | 7 | 8
(2 rows)

-- Check repartion joins are supported
SET citus.enable_repartition_joins TO ON;
SELECT * FROM test t1, test t2 WHERE t1.x = t2.y ORDER BY t1.x;
 x | y | x | y
---------------------------------------------------------------------
 2 | 7 | 1 | 2
 4 | 5 | 3 | 4
 5 | 6 | 4 | 5
(3 rows)

SET citus.enable_single_hash_repartition_joins TO ON;
SELECT * FROM test t1, test t2 WHERE t1.x = t2.y ORDER BY t1.x;
 x | y | x | y
---------------------------------------------------------------------
 2 | 7 | 1 | 2
 4 | 5 | 3 | 4
 5 | 6 | 4 | 5
(3 rows)

SET search_path TO public;
SET citus.enable_single_hash_repartition_joins TO OFF;
SELECT * FROM single_node.test t1, single_node.test t2 WHERE t1.x = t2.y ORDER BY t1.x;
 x | y | x | y
---------------------------------------------------------------------
 2 | 7 | 1 | 2
 4 | 5 | 3 | 4
 5 | 6 | 4 | 5
(3 rows)

SET citus.enable_single_hash_repartition_joins TO ON;
SELECT * FROM single_node.test t1, single_node.test t2 WHERE t1.x = t2.y ORDER BY t1.x;
 x | y | x | y
---------------------------------------------------------------------
 2 | 7 | 1 | 2
 4 | 5 | 3 | 4
 5 | 6 | 4 | 5
(3 rows)

SET search_path TO single_node;
SET citus.task_assignment_policy TO 'round-robin';
SET citus.enable_single_hash_repartition_joins TO ON;
SELECT * FROM test t1, test t2 WHERE t1.x = t2.y ORDER BY t1.x;
 x | y | x | y
---------------------------------------------------------------------
 2 | 7 | 1 | 2
 4 | 5 | 3 | 4
 5 | 6 | 4 | 5
(3 rows)

SET citus.task_assignment_policy TO 'greedy';
SELECT * FROM test t1, test t2 WHERE t1.x = t2.y ORDER BY t1.x;
 x | y | x | y
---------------------------------------------------------------------
 2 | 7 | 1 | 2
 4 | 5 | 3 | 4
 5 | 6 | 4 | 5
(3 rows)

SET citus.task_assignment_policy TO 'first-replica';
SELECT * FROM test t1, test t2 WHERE t1.x = t2.y ORDER BY t1.x;
 x | y | x | y
---------------------------------------------------------------------
 2 | 7 | 1 | 2
 4 | 5 | 3 | 4
 5 | 6 | 4 | 5
(3 rows)

RESET citus.enable_repartition_joins;
RESET citus.enable_single_hash_repartition_joins;
-- INSERT SELECT router
BEGIN;
INSERT INTO test(x, y) SELECT x, y FROM test WHERE x = 1;
SELECT count(*) from test;
 count
---------------------------------------------------------------------
     6
(1 row)

ROLLBACK;
-- INSERT SELECT pushdown
BEGIN;
INSERT INTO test(x, y) SELECT x, y FROM test;
SELECT count(*) from test;
 count
---------------------------------------------------------------------
    10
(1 row)

ROLLBACK;
-- INSERT SELECT analytical query
BEGIN;
INSERT INTO test(x, y) SELECT count(x), max(y) FROM test;
SELECT count(*) from test;
 count
---------------------------------------------------------------------
     6
(1 row)

ROLLBACK;
-- INSERT SELECT repartition
BEGIN;
INSERT INTO test(x, y) SELECT y, x FROM test;
SELECT count(*) from test;
 count
---------------------------------------------------------------------
    10
(1 row)

ROLLBACK;
-- INSERT SELECT from reference table into distributed
BEGIN;
INSERT INTO test(x, y) SELECT a, b FROM ref;
SELECT count(*) from test;
 count
---------------------------------------------------------------------
     8
(1 row)

ROLLBACK;
-- INSERT SELECT from local table into distributed
BEGIN;
INSERT INTO test(x, y) SELECT c, d FROM local;
SELECT count(*) from test;
 count
---------------------------------------------------------------------
     8
(1 row)

ROLLBACK;
-- INSERT SELECT from distributed table to local table
BEGIN;
INSERT INTO ref(a, b) SELECT x, y FROM test;
SELECT count(*) from ref;
 count
---------------------------------------------------------------------
     8
(1 row)

ROLLBACK;
-- INSERT SELECT from distributed table to local table
BEGIN;
INSERT INTO ref(a, b) SELECT c, d FROM local;
SELECT count(*) from ref;
 count
---------------------------------------------------------------------
     6
(1 row)

ROLLBACK;
-- INSERT SELECT from distributed table to local table
BEGIN;
INSERT INTO local(c, d) SELECT x, y FROM test;
SELECT count(*) from local;
 count
---------------------------------------------------------------------
     8
(1 row)

ROLLBACK;
-- INSERT SELECT from distributed table to local table
BEGIN;
INSERT INTO local(c, d) SELECT a, b FROM ref;
SELECT count(*) from local;
 count
---------------------------------------------------------------------
     6
(1 row)

ROLLBACK;
-- Confirm that dummy placements work
SELECT count(*) FROM test WHERE false;
 count
---------------------------------------------------------------------
     0
(1 row)

SELECT count(*) FROM test WHERE false GROUP BY GROUPING SETS (x,y);
 count
---------------------------------------------------------------------
(0 rows)

-- Confirm that they work with round-robin task assignment policy
SET citus.task_assignment_policy TO 'round-robin';
SELECT count(*) FROM test WHERE false;
 count
---------------------------------------------------------------------
     0
(1 row)

SELECT count(*) FROM test WHERE false GROUP BY GROUPING SETS (x,y);
 count
---------------------------------------------------------------------
(0 rows)

RESET citus.task_assignment_policy;
SELECT count(*) FROM test;
 count
---------------------------------------------------------------------
     5
(1 row)

-- INSERT SELECT from distributed table to local table
BEGIN;
INSERT INTO ref(a, b) SELECT x, y FROM test;
SELECT count(*) from ref;
 count
---------------------------------------------------------------------
     8
(1 row)

ROLLBACK;
-- INSERT SELECT from distributed table to local table
BEGIN;
INSERT INTO ref(a, b) SELECT c, d FROM local;
SELECT count(*) from ref;
 count
---------------------------------------------------------------------
     6
(1 row)

ROLLBACK;
-- INSERT SELECT from distributed table to local table
BEGIN;
INSERT INTO local(c, d) SELECT x, y FROM test;
SELECT count(*) from local;
 count
---------------------------------------------------------------------
     8
(1 row)

ROLLBACK;
-- INSERT SELECT from distributed table to local table
BEGIN;
INSERT INTO local(c, d) SELECT a, b FROM ref;
SELECT count(*) from local;
 count
---------------------------------------------------------------------
     6
(1 row)

ROLLBACK;
-- query fails on the shards should be handled
-- nicely
SELECT x/0 FROM test;
ERROR:  division by zero
CONTEXT:  while executing command on localhost:xxxxx
-- Add "fake" pg_dist_transaction records and run recovery
-- to show that it is recovered
-- Temporarily disable automatic 2PC recovery
ALTER SYSTEM SET citus.recover_2pc_interval TO -1;
SELECT pg_reload_conf();
 pg_reload_conf
---------------------------------------------------------------------
 t
(1 row)

BEGIN;
CREATE TABLE should_commit (value int);
PREPARE TRANSACTION 'citus_0_should_commit';
-- zero is the coordinator's group id, so we can hard code it
INSERT INTO pg_dist_transaction VALUES (0, 'citus_0_should_commit');
SELECT recover_prepared_transactions();
 recover_prepared_transactions
---------------------------------------------------------------------
                             1
(1 row)

-- the table should be seen
SELECT * FROM should_commit;
 value
---------------------------------------------------------------------
(0 rows)

-- set the original back
ALTER SYSTEM RESET citus.recover_2pc_interval;
SELECT pg_reload_conf();
 pg_reload_conf
---------------------------------------------------------------------
 t
(1 row)

RESET citus.task_executor_type;
-- make sure undistribute table works fine
ALTER TABLE test DROP CONSTRAINT foreign_key;
SELECT undistribute_table('test_2');
NOTICE:  creating a new local table for single_node.test_2
NOTICE:  Moving the data of single_node.test_2
NOTICE:  Dropping the old single_node.test_2
NOTICE:  Renaming the new table to single_node.test_2
 undistribute_table
---------------------------------------------------------------------

(1 row)

SELECT * FROM pg_dist_partition WHERE logicalrelid = 'test_2'::regclass;
 logicalrelid | partmethod | partkey | colocationid | repmodel
---------------------------------------------------------------------
(0 rows)

CREATE PROCEDURE call_delegation(x int) LANGUAGE plpgsql AS $$
BEGIN
	 INSERT INTO test (x) VALUES ($1);
END;$$;
SELECT * FROM pg_dist_node;
 nodeid | groupid | nodename  | nodeport | noderack | hasmetadata | isactive | noderole | nodecluster | metadatasynced | shouldhaveshards
---------------------------------------------------------------------
      1 |       0 | localhost |    57636 | default  | t           | t        | primary  | default     | t              | t
(1 row)

SELECT create_distributed_function('call_delegation(int)', '$1', 'test');
 create_distributed_function
---------------------------------------------------------------------

(1 row)

CREATE FUNCTION function_delegation(int) RETURNS void AS $$
BEGIN
UPDATE test SET y = y + 1 WHERE x <  $1;
END;
$$ LANGUAGE plpgsql;
SELECT create_distributed_function('function_delegation(int)', '$1', 'test');
 create_distributed_function
---------------------------------------------------------------------

(1 row)

SET client_min_messages TO DEBUG1;
CALL call_delegation(1);
DEBUG:  not pushing down procedure to the same node
SELECT function_delegation(1);
DEBUG:  not pushing down function to the same node
 function_delegation
---------------------------------------------------------------------

(1 row)

SET client_min_messages TO WARNING;
DROP TABLE test CASCADE;
-- cannot remove coordinator since a reference table exists on coordinator and no other worker nodes are added
SELECT 1 FROM master_remove_node('localhost', :master_port);
ERROR:  cannot remove the last worker node because there are reference tables and it would cause data loss on reference tables
HINT:  To proceed, either drop the reference tables or use undistribute_table() function to convert them to local tables
-- Cleanup
DROP SCHEMA single_node CASCADE;
-- Remove the coordinator again
SELECT 1 FROM master_remove_node('localhost', :master_port);
 ?column?
---------------------------------------------------------------------
        1
(1 row)

-- restart nodeid sequence so that multi_cluster_management still has the same
-- nodeids
ALTER SEQUENCE pg_dist_node_nodeid_seq RESTART 1;