connect  master,127.0.0.1,root,,test,$MASTER_MYPORT,;
connect  slave,127.0.0.1,root,,test,$SLAVE_MYPORT,;
connection master;
CREATE DATABASE federated;
connection slave;
CREATE DATABASE federated;
connection default;
set global federated_pushdown=1;
connection slave;
DROP TABLE IF EXISTS federated.t1;
Warnings:
Note	1051	Unknown table 'federated.t1'
CREATE TABLE federated.t1 (
id int(20) NOT NULL,
name varchar(16) NOT NULL default ''
)
DEFAULT CHARSET=latin1;
INSERT INTO federated.t1 VALUES
(3,'xxx'), (7,'yyy'), (4,'xxx'), (1,'zzz'), (5,'yyy');
DROP TABLE IF EXISTS federated.t2;
Warnings:
Note	1051	Unknown table 'federated.t2'
CREATE TABLE federated.t2 (
name varchar(16) NOT NULL default ''
)
DEFAULT CHARSET=latin1;
INSERT INTO federated.t2 VALUES
('yyy'), ('www'), ('yyy'), ('xxx'), ('www'), ('yyy'), ('www');
connection master;
DROP TABLE IF EXISTS federated.t1;
Warnings:
Note	1051	Unknown table 'federated.t1'
CREATE TABLE federated.t1 (
id int(20) NOT NULL,
name varchar(16) NOT NULL default ''
)
ENGINE="FEDERATED" DEFAULT CHARSET=latin1
CONNECTION='mysql://root@127.0.0.1:SLAVE_PORT/federated/t1';
DROP TABLE IF EXISTS federated.t2;
Warnings:
Note	1051	Unknown table 'federated.t2'
CREATE TABLE federated.t2 (
name varchar(16) NOT NULL default ''
)
ENGINE="FEDERATED" DEFAULT CHARSET=latin1
CONNECTION='mysql://root@127.0.0.1:SLAVE_PORT/federated/t2';
SELECT * FROM federated.t1;
id	name
3	xxx
7	yyy
4	xxx
1	zzz
5	yyy
SELECT id FROM federated.t1 WHERE id < 5;
id
3
4
1
SELECT count(*), name FROM federated.t1 WHERE id < 5 GROUP BY name;
count(*)	name
2	xxx
1	zzz
SELECT * FROM federated.t1, federated.t2
WHERE federated.t1.name = federated.t2.name;
id	name	name
7	yyy	yyy
5	yyy	yyy
7	yyy	yyy
5	yyy	yyy
3	xxx	xxx
4	xxx	xxx
7	yyy	yyy
5	yyy	yyy
SELECT * FROM federated.t1 LEFT JOIN federated.t2
ON federated.t1.name = federated.t2.name
WHERE federated.t1.id > 1;
id	name	name
7	yyy	yyy
5	yyy	yyy
7	yyy	yyy
5	yyy	yyy
3	xxx	xxx
4	xxx	xxx
7	yyy	yyy
5	yyy	yyy
SELECT * FROM federated.t1
WHERE id IN (SELECT count(*) FROM federated.t2 GROUP BY name);
id	name
3	xxx
1	zzz
EXPLAIN
SELECT id FROM federated.t1 WHERE id < 5;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PUSHED SELECT	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL
EXPLAIN EXTENDED
SELECT id FROM federated.t1 WHERE id < 5;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PUSHED SELECT	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL
Warnings:
Note	1003	select `federated`.`t1`.`id` AS `id` from `federated`.`t1` where `federated`.`t1`.`id` < 5
EXPLAIN FORMAT=JSON
SELECT id FROM federated.t1 WHERE id < 5;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Pushed select"
    }
  }
}
ANALYZE
SELECT id FROM federated.t1 WHERE id < 5;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	PUSHED SELECT	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL
ANALYZE FORMAT=JSON
SELECT id FROM federated.t1 WHERE id < 5;
ANALYZE
{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Pushed select"
    }
  }
}
CREATE TABLE federated.t3 (
name varchar(16) NOT NULL default ''
)
DEFAULT CHARSET=latin1;
INSERT INTO federated.t3 VALUES
('yyy'), ('www'), ('yyy'), ('xxx'), ('www'), ('yyy'), ('www');
SELECT *
FROM federated.t3, (SELECT * FROM federated.t1 WHERE id > 3) t
WHERE federated.t3.name=t.name;
name	id	name
yyy	5	yyy
yyy	7	yyy
yyy	5	yyy
yyy	7	yyy
xxx	4	xxx
yyy	5	yyy
yyy	7	yyy
EXPLAIN
SELECT *
FROM federated.t3, (SELECT * FROM federated.t1 WHERE id > 3) t
WHERE federated.t3.name=t.name;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	7	
1	PRIMARY	<derived2>	ref	key0	key0	18	federated.t3.name	2	
2	PUSHED DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL
EXPLAIN FORMAT=JSON
SELECT *
FROM federated.t3, (SELECT * FROM federated.t1 WHERE id > 3) t
WHERE federated.t3.name=t.name;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t3",
      "access_type": "ALL",
      "rows": 7,
      "filtered": 100
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "18",
      "used_key_parts": ["name"],
      "ref": ["federated.t3.name"],
      "rows": 2,
      "filtered": 100,
      "materialized": {
        "query_block": {
          "select_id": 2,
          "table": {
            "message": "Pushed derived"
          }
        }
      }
    }
  }
}
ANALYZE
SELECT *
FROM federated.t3, (SELECT * FROM federated.t1 WHERE id > 3) t
WHERE federated.t3.name=t.name;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	7	7.00	100.00	100.00	
1	PRIMARY	<derived2>	ref	key0	key0	18	federated.t3.name	2	0.00	100.00	100.00	
2	PUSHED DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL
SELECT *
FROM federated.t3, (SELECT t1.name FROM federated.t1
WHERE id IN (SELECT count(*)
FROM federated.t2 GROUP BY name)) t
WHERE federated.t3.name=t.name;
name	name
xxx	xxx
EXPLAIN
SELECT *
FROM federated.t3, (SELECT t1.name FROM federated.t1
WHERE id IN (SELECT count(*)
FROM federated.t2 GROUP BY name)) t
WHERE federated.t3.name=t.name;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	7	
1	PRIMARY	<derived2>	ref	key0	key0	18	federated.t3.name	2	
2	PUSHED DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL
3	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	7	Using temporary
ANALYZE FORMAT=JSON
SELECT *
FROM federated.t3, (SELECT t1.name FROM federated.t1
WHERE id IN (SELECT count(*)
FROM federated.t2 GROUP BY name)) t
WHERE federated.t3.name=t.name;
ANALYZE
{
  "query_block": {
    "select_id": 1,
    "r_loops": 1,
    "r_total_time_ms": "REPLACED",
    "table": {
      "table_name": "t3",
      "access_type": "ALL",
      "r_loops": 1,
      "rows": 7,
      "r_rows": 7,
      "r_total_time_ms": "REPLACED",
      "filtered": 100,
      "r_filtered": 100
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "18",
      "used_key_parts": ["name"],
      "ref": ["federated.t3.name"],
      "r_loops": 7,
      "rows": 2,
      "r_rows": 0,
      "r_total_time_ms": "REPLACED",
      "filtered": 100,
      "r_filtered": 100,
      "materialized": {
        "query_block": {
          "select_id": 2,
          "table": {
            "message": "Pushed derived"
          },
          "subqueries": [
            {
              "query_block": {
                "select_id": 3,
                "temporary_table": {
                  "table": {
                    "table_name": "t2",
                    "access_type": "ALL",
                    "r_loops": 0,
                    "rows": 7,
                    "r_rows": null,
                    "filtered": 100,
                    "r_filtered": null
                  }
                }
              }
            }
          ]
        }
      }
    }
  }
}
SELECT t.id, federated.t3.name
FROM federated.t3,
( SELECT * FROM federated.t1 WHERE id < 3
UNION
SELECT * FROM federated.t1 WHERE id >= 5) t
WHERE federated.t3.name=t.name;
id	name
5	yyy
7	yyy
5	yyy
7	yyy
5	yyy
7	yyy
EXPLAIN
SELECT t.id, federated.t3.name
FROM federated.t3,
( SELECT * FROM federated.t1 WHERE id < 3
UNION
SELECT * FROM federated.t1 WHERE id >= 5) t
WHERE federated.t3.name=t.name;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	7	
1	PRIMARY	<derived2>	ref	key0	key0	18	federated.t3.name	2	
2	PUSHED DERIVED	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL
DROP TABLE federated.t1, federated.t2, federated.t3;
connection slave;
DROP TABLE federated.t1, federated.t2;
connection default;
set global federated_pushdown=0;
connection master;
DROP TABLE IF EXISTS federated.t1;
DROP DATABASE IF EXISTS federated;
connection slave;
DROP TABLE IF EXISTS federated.t1;
DROP DATABASE IF EXISTS federated;