mirror of
https://github.com/MariaDB/server.git
synced 2025-01-30 02:30:06 +01:00
312 lines
7.9 KiB
Text
312 lines
7.9 KiB
Text
connect master,127.0.0.1,root,,test,$MASTER_MYPORT,;
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connect slave,127.0.0.1,root,,test,$SLAVE_MYPORT,;
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connection master;
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CREATE DATABASE federated;
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connection slave;
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CREATE DATABASE federated;
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connection default;
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set global federated_pushdown=1;
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connection slave;
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DROP TABLE IF EXISTS federated.t1;
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Warnings:
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Note 1051 Unknown table 'federated.t1'
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CREATE TABLE federated.t1 (
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id int(20) NOT NULL,
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name varchar(16) NOT NULL default ''
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)
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DEFAULT CHARSET=latin1;
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INSERT INTO federated.t1 VALUES
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(3,'xxx'), (7,'yyy'), (4,'xxx'), (1,'zzz'), (5,'yyy');
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DROP TABLE IF EXISTS federated.t2;
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Warnings:
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Note 1051 Unknown table 'federated.t2'
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CREATE TABLE federated.t2 (
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name varchar(16) NOT NULL default ''
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)
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DEFAULT CHARSET=latin1;
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INSERT INTO federated.t2 VALUES
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('yyy'), ('www'), ('yyy'), ('xxx'), ('www'), ('yyy'), ('www');
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connection master;
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DROP TABLE IF EXISTS federated.t1;
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Warnings:
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Note 1051 Unknown table 'federated.t1'
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CREATE TABLE federated.t1 (
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id int(20) NOT NULL,
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name varchar(16) NOT NULL default ''
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)
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ENGINE="FEDERATED" DEFAULT CHARSET=latin1
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CONNECTION='mysql://root@127.0.0.1:SLAVE_PORT/federated/t1';
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DROP TABLE IF EXISTS federated.t2;
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Warnings:
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Note 1051 Unknown table 'federated.t2'
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CREATE TABLE federated.t2 (
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name varchar(16) NOT NULL default ''
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)
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ENGINE="FEDERATED" DEFAULT CHARSET=latin1
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CONNECTION='mysql://root@127.0.0.1:SLAVE_PORT/federated/t2';
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SELECT * FROM federated.t1;
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id name
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3 xxx
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7 yyy
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4 xxx
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1 zzz
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5 yyy
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SELECT id FROM federated.t1 WHERE id < 5;
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id
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3
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4
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1
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SELECT count(*), name FROM federated.t1 WHERE id < 5 GROUP BY name;
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count(*) name
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2 xxx
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1 zzz
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SELECT * FROM federated.t1, federated.t2
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WHERE federated.t1.name = federated.t2.name;
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id name name
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7 yyy yyy
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5 yyy yyy
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7 yyy yyy
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5 yyy yyy
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3 xxx xxx
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4 xxx xxx
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7 yyy yyy
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5 yyy yyy
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SELECT * FROM federated.t1 LEFT JOIN federated.t2
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ON federated.t1.name = federated.t2.name
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WHERE federated.t1.id > 1;
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id name name
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7 yyy yyy
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5 yyy yyy
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7 yyy yyy
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5 yyy yyy
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3 xxx xxx
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4 xxx xxx
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7 yyy yyy
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5 yyy yyy
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SELECT * FROM federated.t1
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WHERE id IN (SELECT count(*) FROM federated.t2 GROUP BY name);
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id name
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3 xxx
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1 zzz
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EXPLAIN
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SELECT id FROM federated.t1 WHERE id < 5;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PUSHED SELECT NULL NULL NULL NULL NULL NULL NULL NULL
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EXPLAIN EXTENDED
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SELECT id FROM federated.t1 WHERE id < 5;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PUSHED SELECT NULL NULL NULL NULL NULL NULL NULL NULL NULL
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Warnings:
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Note 1003 select `federated`.`t1`.`id` AS `id` from `federated`.`t1` where `federated`.`t1`.`id` < 5
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EXPLAIN FORMAT=JSON
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SELECT id FROM federated.t1 WHERE id < 5;
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EXPLAIN
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{
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"query_block": {
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"select_id": 1,
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"table": {
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"message": "Pushed select"
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}
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}
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}
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ANALYZE
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SELECT id FROM federated.t1 WHERE id < 5;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PUSHED SELECT NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL
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ANALYZE FORMAT=JSON
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SELECT id FROM federated.t1 WHERE id < 5;
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ANALYZE
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{
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"query_block": {
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"select_id": 1,
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"table": {
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"message": "Pushed select"
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}
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}
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}
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CREATE TABLE federated.t3 (
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name varchar(16) NOT NULL default ''
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)
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DEFAULT CHARSET=latin1;
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INSERT INTO federated.t3 VALUES
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('yyy'), ('www'), ('yyy'), ('xxx'), ('www'), ('yyy'), ('www');
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SELECT *
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FROM federated.t3, (SELECT * FROM federated.t1 WHERE id > 3) t
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WHERE federated.t3.name=t.name;
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name id name
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yyy 5 yyy
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yyy 7 yyy
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yyy 5 yyy
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yyy 7 yyy
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xxx 4 xxx
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yyy 5 yyy
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yyy 7 yyy
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EXPLAIN
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SELECT *
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FROM federated.t3, (SELECT * FROM federated.t1 WHERE id > 3) t
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WHERE federated.t3.name=t.name;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t3 ALL NULL NULL NULL NULL 7
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1 PRIMARY <derived2> ref key0 key0 18 federated.t3.name 2
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2 PUSHED DERIVED NULL NULL NULL NULL NULL NULL NULL NULL
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EXPLAIN FORMAT=JSON
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SELECT *
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FROM federated.t3, (SELECT * FROM federated.t1 WHERE id > 3) t
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WHERE federated.t3.name=t.name;
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EXPLAIN
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{
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"query_block": {
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"select_id": 1,
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"table": {
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"table_name": "t3",
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"access_type": "ALL",
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"rows": 7,
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"filtered": 100
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},
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"table": {
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"table_name": "<derived2>",
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"access_type": "ref",
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"possible_keys": ["key0"],
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"key": "key0",
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"key_length": "18",
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"used_key_parts": ["name"],
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"ref": ["federated.t3.name"],
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"rows": 2,
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"filtered": 100,
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"materialized": {
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"query_block": {
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"select_id": 2,
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"table": {
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"message": "Pushed derived"
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}
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}
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}
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}
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}
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}
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ANALYZE
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SELECT *
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FROM federated.t3, (SELECT * FROM federated.t1 WHERE id > 3) t
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WHERE federated.t3.name=t.name;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY t3 ALL NULL NULL NULL NULL 7 7.00 100.00 100.00
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1 PRIMARY <derived2> ref key0 key0 18 federated.t3.name 2 0.00 100.00 100.00
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2 PUSHED DERIVED NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL
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SELECT *
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FROM federated.t3, (SELECT t1.name FROM federated.t1
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WHERE id IN (SELECT count(*)
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FROM federated.t2 GROUP BY name)) t
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WHERE federated.t3.name=t.name;
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name name
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xxx xxx
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EXPLAIN
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SELECT *
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FROM federated.t3, (SELECT t1.name FROM federated.t1
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WHERE id IN (SELECT count(*)
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FROM federated.t2 GROUP BY name)) t
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WHERE federated.t3.name=t.name;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t3 ALL NULL NULL NULL NULL 7
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1 PRIMARY <derived2> ref key0 key0 18 federated.t3.name 2
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2 PUSHED DERIVED NULL NULL NULL NULL NULL NULL NULL NULL
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3 MATERIALIZED t2 ALL NULL NULL NULL NULL 7 Using temporary
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ANALYZE FORMAT=JSON
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SELECT *
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FROM federated.t3, (SELECT t1.name FROM federated.t1
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WHERE id IN (SELECT count(*)
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FROM federated.t2 GROUP BY name)) t
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WHERE federated.t3.name=t.name;
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ANALYZE
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{
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"query_block": {
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"select_id": 1,
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"r_loops": 1,
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"r_total_time_ms": "REPLACED",
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"table": {
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"table_name": "t3",
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"access_type": "ALL",
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"r_loops": 1,
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"rows": 7,
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"r_rows": 7,
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"r_total_time_ms": "REPLACED",
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"filtered": 100,
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"r_filtered": 100
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},
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"table": {
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"table_name": "<derived2>",
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"access_type": "ref",
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"possible_keys": ["key0"],
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"key": "key0",
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"key_length": "18",
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"used_key_parts": ["name"],
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"ref": ["federated.t3.name"],
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"r_loops": 7,
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"rows": 2,
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"r_rows": 0,
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"r_total_time_ms": "REPLACED",
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"filtered": 100,
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"r_filtered": 100,
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"materialized": {
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"query_block": {
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"select_id": 2,
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"table": {
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"message": "Pushed derived"
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},
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"subqueries": [
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{
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"query_block": {
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"select_id": 3,
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"temporary_table": {
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"table": {
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"table_name": "t2",
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"access_type": "ALL",
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"r_loops": 0,
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"rows": 7,
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"r_rows": null,
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"filtered": 100,
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"r_filtered": null
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}
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}
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}
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}
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]
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}
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}
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}
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}
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}
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SELECT t.id, federated.t3.name
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FROM federated.t3,
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( SELECT * FROM federated.t1 WHERE id < 3
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UNION
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SELECT * FROM federated.t1 WHERE id >= 5) t
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WHERE federated.t3.name=t.name;
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id name
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5 yyy
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7 yyy
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5 yyy
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7 yyy
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5 yyy
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7 yyy
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EXPLAIN
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SELECT t.id, federated.t3.name
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FROM federated.t3,
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( SELECT * FROM federated.t1 WHERE id < 3
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UNION
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SELECT * FROM federated.t1 WHERE id >= 5) t
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WHERE federated.t3.name=t.name;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t3 ALL NULL NULL NULL NULL 7
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1 PRIMARY <derived2> ref key0 key0 18 federated.t3.name 2
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2 PUSHED DERIVED NULL NULL NULL NULL NULL NULL NULL NULL
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DROP TABLE federated.t1, federated.t2, federated.t3;
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connection slave;
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DROP TABLE federated.t1, federated.t2;
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connection default;
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set global federated_pushdown=0;
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connection master;
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DROP TABLE IF EXISTS federated.t1;
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DROP DATABASE IF EXISTS federated;
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connection slave;
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DROP TABLE IF EXISTS federated.t1;
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DROP DATABASE IF EXISTS federated;
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