CREATE SCHEMA adaptive_executor;
SET search_path TO adaptive_executor;

SET citus.shard_replication_factor to 1;
SET citus.enable_repartition_joins TO true;

CREATE TABLE ab(a int, b int);
SELECT create_distributed_table('ab', 'a');
INSERT INTO ab SELECT *,* FROM generate_series(1,10);

SELECT COUNT(*) FROM ab k, ab l
WHERE k.a = l.b;

SELECT COUNT(*) FROM ab k, ab l, ab m, ab t
WHERE k.a = l.b AND k.a = m.b AND t.b = l.a;

SELECT count(*) FROM (SELECT k.a FROM ab k, ab l WHERE k.a = l.b) first, (SELECT * FROM ab) second WHERE first.a = second.b;

BEGIN;
SELECT count(*) FROM (SELECT k.a FROM ab k, ab l WHERE k.a = l.b) first, (SELECT * FROM ab) second WHERE first.a = second.b;
SELECT count(*) FROM (SELECT k.a FROM ab k, ab l WHERE k.a = l.b) first, (SELECT * FROM ab) second WHERE first.a = second.b;
SELECT count(*) FROM (SELECT k.a FROM ab k, ab l WHERE k.a = l.b) first, (SELECT * FROM ab) second WHERE first.a = second.b;
ROLLBACK;

BEGIN;
INSERT INTO ab values(1, 2);
SELECT count(*) FROM (SELECT k.a FROM ab k, ab l WHERE k.a = l.b) first, (SELECT * FROM ab) second WHERE first.a = second.b;
ROLLBACK;

SET citus.enable_single_hash_repartition_joins TO ON;

CREATE TABLE single_hash_repartition_first (id int, sum int, avg float);
CREATE TABLE single_hash_repartition_second (id int, sum int, avg float);
CREATE TABLE ref_table (id int, sum int, avg float);


SELECT create_distributed_table('single_hash_repartition_first', 'id');
SELECT create_distributed_table('single_hash_repartition_second', 'id');
SELECT create_reference_table('ref_table');


-- single hash repartition after bcast joins
EXPLAIN (COSTS OFF)
SELECT
	count(*)
FROM
	ref_table r1, single_hash_repartition_second t1, single_hash_repartition_first t2
WHERE
	r1.id = t1.id AND t2.sum = t1.id;

-- a more complicated join order, first colocated join, later single hash repartition join
EXPLAIN (COSTS OFF)
SELECT
	count(*)
FROM
	single_hash_repartition_first t1, single_hash_repartition_first t2, single_hash_repartition_second t3
WHERE
	t1.id = t2.id AND t1.sum = t3.id;

SET citus.enable_single_hash_repartition_joins TO OFF;

--issue 4315
create table cars (car_id int);
insert into cars select s from generate_series(1,10) s;

create table trips (trip_id int, car_id int);
insert into trips select s % 10, s % 11 from generate_series(1, 100) s;

-- the result of this should be the same when the tables are distributed
select count(*) from trips t1, cars r1, trips t2, cars r2 where t1.trip_id = t2.trip_id and t1.car_id = r1.car_id and t2.car_id = r2.car_id;

select create_distributed_table('trips', 'trip_id');
select create_distributed_table('cars', 'car_id');

set citus.enable_repartition_joins to on;
set citus.enable_single_hash_repartition_joins to off;
select count(*) from trips t1, cars r1, trips t2, cars r2 where t1.trip_id = t2.trip_id and t1.car_id = r1.car_id and t2.car_id = r2.car_id;

set citus.enable_single_hash_repartition_joins to on;
select count(*) from trips t1, cars r1, trips t2, cars r2 where t1.trip_id = t2.trip_id and t1.car_id = r1.car_id and t2.car_id = r2.car_id;

DROP SCHEMA adaptive_executor CASCADE;
