EVOLUTION-MANAGER

Edit File: derived_view.result

drop table if exists t1,t2; drop view if exists v1,v2,v3,v4; set @exit_optimizer_switch=@@optimizer_switch; set @exit_join_cache_level=@@join_cache_level; set optimizer_switch='derived_merge=on,derived_with_keys=on'; set @save_optimizer_switch=@@optimizer_switch; set join_cache_level=1; create table t1(f1 int, f11 int); create table t2(f2 int, f22 int); insert into t1 values(1,1),(2,2),(3,3),(5,5),(9,9),(7,7); insert into t1 values(17,17),(13,13),(11,11),(15,15),(19,19); insert into t2 values(1,1),(3,3),(2,2),(4,4),(8,8),(6,6); insert into t2 values(12,12),(14,14),(10,10),(18,18),(16,16); Tests: for merged derived tables explain for simple derived explain select * from (select * from t1) tt; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 11 select * from (select * from t1) tt; f1 f11 1 1 2 2 3 3 5 5 9 9 7 7 17 17 13 13 11 11 15 15 19 19 explain for multitable derived explain extended select * from (select * from t1 join t2 on f1=f2) tt; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 11 100.00 1 SIMPLE t2 ALL NULL NULL NULL NULL 11 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t1` join `test`.`t2` where `test`.`t2`.`f2` = `test`.`t1`.`f1` select * from (select * from t1 join t2 on f1=f2) tt; f1 f11 f2 f22 1 1 1 1 3 3 3 3 2 2 2 2 explain for derived with where explain extended select * from (select * from t1 where f1 in (2,3)) tt where f11=2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 11 100.00 Using where Warnings: Note 1003 select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where `test`.`t1`.`f11` = 2 and `test`.`t1`.`f1` in (2,3) select * from (select * from t1 where f1 in (2,3)) tt where f11=2; f1 f11 2 2 join of derived explain extended select * from (select * from t1 where f1 in (2,3)) tt join (select * from t1 where f1 in (1,2)) aa on tt.f1=aa.f1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 11 100.00 Using where 1 SIMPLE t1 ALL NULL NULL NULL NULL 11 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` join `test`.`t1` where `test`.`t1`.`f1` = `test`.`t1`.`f1` and `test`.`t1`.`f1` in (1,2) and `test`.`t1`.`f1` in (2,3) select * from (select * from t1 where f1 in (2,3)) tt join (select * from t1 where f1 in (1,2)) aa on tt.f1=aa.f1; f1 f11 f1 f11 2 2 2 2 flush status; explain extended select * from (select * from t1 where f1 in (2,3)) tt where f11=2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 11 100.00 Using where Warnings: Note 1003 select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where `test`.`t1`.`f11` = 2 and `test`.`t1`.`f1` in (2,3) show status like 'Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 0 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 0 flush status; select * from (select * from t1 where f1 in (2,3)) tt where f11=2; f1 f11 2 2 show status like 'Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 0 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 12 for merged views create view v1 as select * from t1; create view v2 as select * from t1 join t2 on f1=f2; create view v3 as select * from t1 where f1 in (2,3); create view v4 as select * from t2 where f2 in (2,3); explain for simple views explain extended select * from v1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 11 100.00 Warnings: Note 1003 select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` select * from v1; f1 f11 1 1 2 2 3 3 5 5 9 9 7 7 17 17 13 13 11 11 15 15 19 19 explain for multitable views explain extended select * from v2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 11 100.00 1 SIMPLE t2 ALL NULL NULL NULL NULL 11 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t1` join `test`.`t2` where `test`.`t2`.`f2` = `test`.`t1`.`f1` select * from v2; f1 f11 f2 f22 1 1 1 1 3 3 3 3 2 2 2 2 explain for views with where explain extended select * from v3 where f11 in (1,3); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 11 100.00 Using where Warnings: Note 1003 select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where `test`.`t1`.`f11` in (1,3) and `test`.`t1`.`f1` in (2,3) select * from v3 where f11 in (1,3); f1 f11 3 3 explain for joined views explain extended select * from v3 join v4 on f1=f2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 11 100.00 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 11 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t1` join `test`.`t2` where `test`.`t2`.`f2` = `test`.`t1`.`f1` and `test`.`t1`.`f1` in (2,3) and `test`.`t1`.`f1` in (2,3) select * from v3 join v4 on f1=f2; f1 f11 f2 f22 3 3 3 3 2 2 2 2 flush status; explain extended select * from v4 where f2 in (1,3); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 11 100.00 Using where Warnings: Note 1003 select `test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t2` where `test`.`t2`.`f2` in (1,3) and `test`.`t2`.`f2` in (2,3) show status like 'Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 0 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 0 flush status; select * from v4 where f2 in (1,3); f2 f22 3 3 show status like 'Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 0 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 12 for materialized derived tables explain for simple derived explain extended select * from (select * from t1 group by f1) tt; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 11 100.00 2 DERIVED t1 ALL NULL NULL NULL NULL 11 100.00 Using temporary; Using filesort Warnings: Note 1003 /* select#1 */ select `tt`.`f1` AS `f1`,`tt`.`f11` AS `f11` from (/* select#2 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` group by `test`.`t1`.`f1`) `tt` select * from (select * from t1 having f1=f1) tt; f1 f11 1 1 2 2 3 3 5 5 9 9 7 7 17 17 13 13 11 11 15 15 19 19 explain showing created indexes explain extended select * from t1 join (select * from t2 group by f2) tt on f1=f2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 11 100.00 Using where 1 PRIMARY <derived2> ref key0 key0 5 test.t1.f1 2 100.00 2 DERIVED t2 ALL NULL NULL NULL NULL 11 100.00 Using temporary; Using filesort Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`tt`.`f2` AS `f2`,`tt`.`f22` AS `f22` from `test`.`t1` join (/* select#2 */ select `test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t2` group by `test`.`t2`.`f2`) `tt` where `tt`.`f2` = `test`.`t1`.`f1` select * from t1 join (select * from t2 group by f2) tt on f1=f2; f1 f11 f2 f22 1 1 1 1 2 2 2 2 3 3 3 3 explain showing late materialization flush status; explain select * from t1 join (select * from t2 group by f2) tt on f1=f2; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 11 Using where 1 PRIMARY <derived2> ref key0 key0 5 test.t1.f1 2 2 DERIVED t2 ALL NULL NULL NULL NULL 11 Using temporary; Using filesort show status like 'Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 0 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 0 flush status; select * from t1 join (select * from t2 group by f2) tt on f1=f2; f1 f11 f2 f22 1 1 1 1 2 2 2 2 3 3 3 3 show status like 'Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 11 Handler_read_last 0 Handler_read_next 3 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 11 Handler_read_rnd_deleted 0 Handler_read_rnd_next 36 for materialized views drop view v1,v2,v3; create view v1 as select * from t1 group by f1; create view v2 as select * from t2 group by f2; create view v3 as select t1.f1,t1.f11 from t1 join t1 as t11 where t1.f1=t11.f1 having t1.f1<100; explain for simple derived explain extended select * from v1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 11 100.00 2 DERIVED t1 ALL NULL NULL NULL NULL 11 100.00 Using temporary; Using filesort Warnings: Note 1003 /* select#1 */ select `v1`.`f1` AS `f1`,`v1`.`f11` AS `f11` from `test`.`v1` select * from v1; f1 f11 1 1 2 2 3 3 5 5 7 7 9 9 11 11 13 13 15 15 17 17 19 19 explain showing created indexes explain extended select * from t1 join v2 on f1=f2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 11 100.00 Using where 1 PRIMARY <derived2> ref key0 key0 5 test.t1.f1 2 100.00 2 DERIVED t2 ALL NULL NULL NULL NULL 11 100.00 Using temporary; Using filesort Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`v2`.`f2` AS `f2`,`v2`.`f22` AS `f22` from `test`.`t1` join `test`.`v2` where `v2`.`f2` = `test`.`t1`.`f1` select * from t1 join v2 on f1=f2; f1 f11 f2 f22 1 1 1 1 2 2 2 2 3 3 3 3 explain extended select * from t1,v3 as v31,v3 where t1.f1=v31.f1 and t1.f1=v3.f1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 11 100.00 Using where 1 PRIMARY <derived2> ref key0 key0 5 test.t1.f1 10 100.00 1 PRIMARY <derived3> ref key0 key0 5 test.t1.f1 10 100.00 3 DERIVED t1 ALL NULL NULL NULL NULL 11 100.00 3 DERIVED t11 ALL NULL NULL NULL NULL 11 100.00 Using where; Using join buffer (flat, BNL join) 2 DERIVED t1 ALL NULL NULL NULL NULL 11 100.00 2 DERIVED t11 ALL NULL NULL NULL NULL 11 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`v31`.`f1` AS `f1`,`v31`.`f11` AS `f11`,`v3`.`f1` AS `f1`,`v3`.`f11` AS `f11` from `test`.`t1` join `test`.`v3` `v31` join `test`.`v3` where `v31`.`f1` = `test`.`t1`.`f1` and `v3`.`f1` = `test`.`t1`.`f1` flush status; select * from t1,v3 as v31,v3 where t1.f1=v31.f1 and t1.f1=v3.f1; f1 f11 f1 f11 f1 f11 1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3 5 5 5 5 5 5 9 9 9 9 9 9 7 7 7 7 7 7 17 17 17 17 17 17 13 13 13 13 13 13 11 11 11 11 11 11 15 15 15 15 15 15 19 19 19 19 19 19 show status like 'Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 22 Handler_read_last 0 Handler_read_next 22 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 60 explain showing late materialization flush status; explain select * from t1 join v2 on f1=f2; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 11 Using where 1 PRIMARY <derived2> ref key0 key0 5 test.t1.f1 2 2 DERIVED t2 ALL NULL NULL NULL NULL 11 Using temporary; Using filesort show status like 'Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 0 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 0 flush status; select * from t1 join v2 on f1=f2; f1 f11 f2 f22 1 1 1 1 2 2 2 2 3 3 3 3 show status like 'Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 11 Handler_read_last 0 Handler_read_next 3 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 11 Handler_read_rnd_deleted 0 Handler_read_rnd_next 36 explain extended select * from v1 join v4 on f1=f2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 11 100.00 Using where 1 PRIMARY <derived2> ref key0 key0 5 test.t2.f2 2 100.00 2 DERIVED t1 ALL NULL NULL NULL NULL 11 100.00 Using where; Using temporary; Using filesort Warnings: Note 1003 /* select#1 */ select `v1`.`f1` AS `f1`,`v1`.`f11` AS `f11`,`test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`v1` join `test`.`t2` where `v1`.`f1` = `test`.`t2`.`f2` and `test`.`t2`.`f2` in (2,3) explain format=json select * from v1 join v4 on f1=f2; EXPLAIN { "query_block": { "select_id": 1, "table": { "table_name": "t2", "access_type": "ALL", "rows": 11, "filtered": 100, "attached_condition": "t2.f2 in (2,3) and t2.f2 is not null" }, "table": { "table_name": "<derived2>", "access_type": "ref", "possible_keys": ["key0"], "key": "key0", "key_length": "5", "used_key_parts": ["f1"], "ref": ["test.t2.f2"], "rows": 2, "filtered": 100, "materialized": { "query_block": { "select_id": 2, "filesort": { "sort_key": "t1.f1", "temporary_table": { "table": { "table_name": "t1", "access_type": "ALL", "rows": 11, "filtered": 100, "attached_condition": "t1.f1 in (2,3)" } } } } } } } } select * from v1 join v4 on f1=f2; f1 f11 f2 f22 3 3 3 3 2 2 2 2 merged derived in merged derived explain extended select * from (select * from (select * from t1 where f1 < 7) tt where f1 > 2) zz; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 11 100.00 Using where Warnings: Note 1003 select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where `test`.`t1`.`f1` > 2 and `test`.`t1`.`f1` < 7 select * from (select * from (select * from t1 where f1 < 7) tt where f1 > 2) zz; f1 f11 3 3 5 5 materialized derived in merged derived explain extended select * from (select * from (select * from t1 where f1 < 7 group by f1) tt where f1 > 2) zz; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <derived3> ALL NULL NULL NULL NULL 11 100.00 Using where 3 DERIVED t1 ALL NULL NULL NULL NULL 11 100.00 Using where; Using temporary; Using filesort Warnings: Note 1003 /* select#1 */ select `tt`.`f1` AS `f1`,`tt`.`f11` AS `f11` from (/* select#3 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where `test`.`t1`.`f1` < 7 and `test`.`t1`.`f1` > 2 group by `test`.`t1`.`f1`) `tt` where `tt`.`f1` > 2 select * from (select * from (select * from t1 where f1 < 7 group by f1) tt where f1 > 2) zz; f1 f11 3 3 5 5 merged derived in materialized derived explain extended select * from (select * from (select * from t1 where f1 < 7) tt where f1 > 2 group by f1) zz; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 11 100.00 2 DERIVED t1 ALL NULL NULL NULL NULL 11 100.00 Using where; Using temporary; Using filesort Warnings: Note 1003 /* select#1 */ select `zz`.`f1` AS `f1`,`zz`.`f11` AS `f11` from (/* select#2 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where `test`.`t1`.`f1` > 2 and `test`.`t1`.`f1` < 7 group by `test`.`t1`.`f1`) `zz` select * from (select * from (select * from t1 where f1 < 7) tt where f1 > 2 group by f1) zz; f1 f11 3 3 5 5 materialized derived in materialized derived explain extended select * from (select * from (select * from t1 where f1 < 7 group by f1) tt where f1 > 2 group by f1) zz; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 11 100.00 2 DERIVED <derived3> ALL NULL NULL NULL NULL 11 100.00 Using where; Using temporary; Using filesort 3 DERIVED t1 ALL NULL NULL NULL NULL 11 100.00 Using where; Using temporary; Using filesort Warnings: Note 1003 /* select#1 */ select `zz`.`f1` AS `f1`,`zz`.`f11` AS `f11` from (/* select#2 */ select `tt`.`f1` AS `f1`,`tt`.`f11` AS `f11` from (/* select#3 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where `test`.`t1`.`f1` < 7 and `test`.`t1`.`f1` > 2 group by `test`.`t1`.`f1`) `tt` where `tt`.`f1` > 2 group by `tt`.`f1`) `zz` explain format=json select * from (select * from (select * from t1 where f1 < 7 group by f1) tt where f1 > 2 group by f1) zz; EXPLAIN { "query_block": { "select_id": 1, "table": { "table_name": "<derived2>", "access_type": "ALL", "rows": 11, "filtered": 100, "materialized": { "query_block": { "select_id": 2, "filesort": { "sort_key": "tt.f1", "temporary_table": { "table": { "table_name": "<derived3>", "access_type": "ALL", "rows": 11, "filtered": 100, "attached_condition": "tt.f1 > 2", "materialized": { "query_block": { "select_id": 3, "filesort": { "sort_key": "t1.f1", "temporary_table": { "table": { "table_name": "t1", "access_type": "ALL", "rows": 11, "filtered": 100, "attached_condition": "t1.f1 < 7 and t1.f1 > 2" } } } } } } } } } } } } } select * from (select * from (select * from t1 where f1 < 7 group by f1) tt where f1 > 2 group by f1) zz; f1 f11 3 3 5 5 mat in merged derived join mat in merged derived explain extended select * from (select * from (select * from t1 where f1 < 7 group by f1) tt where f1 > 2) x join (select * from (select * from t1 where f1 < 7 group by f1) tt where f1 > 2) z on x.f1 = z.f1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <derived3> ALL NULL NULL NULL NULL 11 100.00 Using where 1 PRIMARY <derived5> ref key0 key0 5 tt.f1 2 100.00 5 DERIVED t1 ALL NULL NULL NULL NULL 11 100.00 Using where; Using temporary; Using filesort 3 DERIVED t1 ALL NULL NULL NULL NULL 11 100.00 Using where; Using temporary; Using filesort Warnings: Note 1003 /* select#1 */ select `tt`.`f1` AS `f1`,`tt`.`f11` AS `f11`,`tt`.`f1` AS `f1`,`tt`.`f11` AS `f11` from (/* select#3 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where `test`.`t1`.`f1` < 7 and `test`.`t1`.`f1` > 2 and `test`.`t1`.`f1` > 2 group by `test`.`t1`.`f1`) `tt` join (/* select#5 */ select `t1`.`f1` AS `f1`,`t1`.`f11` AS `f11` from `test`.`t1` where `t1`.`f1` < 7 and `t1`.`f1` > 2 and `t1`.`f1` > 2 group by `t1`.`f1`) `tt` where `tt`.`f1` = `tt`.`f1` and `tt`.`f1` > 2 and `tt`.`f1` > 2 explain format=json select * from (select * from (select * from t1 where f1 < 7 group by f1) tt where f1 > 2) x join (select * from (select * from t1 where f1 < 7 group by f1) tt where f1 > 2) z on x.f1 = z.f1; EXPLAIN { "query_block": { "select_id": 1, "table": { "table_name": "<derived3>", "access_type": "ALL", "rows": 11, "filtered": 100, "attached_condition": "tt.f1 > 2 and tt.f1 > 2 and tt.f1 is not null", "materialized": { "query_block": { "select_id": 3, "filesort": { "sort_key": "t1.f1", "temporary_table": { "table": { "table_name": "t1", "access_type": "ALL", "rows": 11, "filtered": 100, "attached_condition": "t1.f1 < 7 and t1.f1 > 2 and t1.f1 > 2" } } } } } }, "table": { "table_name": "<derived5>", "access_type": "ref", "possible_keys": ["key0"], "key": "key0", "key_length": "5", "used_key_parts": ["f1"], "ref": ["tt.f1"], "rows": 2, "filtered": 100, "materialized": { "query_block": { "select_id": 5, "filesort": { "sort_key": "t1.f1", "temporary_table": { "table": { "table_name": "t1", "access_type": "ALL", "rows": 11, "filtered": 100, "attached_condition": "t1.f1 < 7 and t1.f1 > 2 and t1.f1 > 2" } } } } } } } } flush status; select * from (select * from (select * from t1 where f1 < 7 group by f1) tt where f1 > 2) x join (select * from (select * from t1 where f1 < 7 group by f1) tt where f1 > 2) z on x.f1 = z.f1; f1 f11 f1 f11 3 3 3 3 5 5 5 5 show status like 'Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 2 Handler_read_last 0 Handler_read_next 2 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 4 Handler_read_rnd_deleted 0 Handler_read_rnd_next 33 flush status; merged in merged derived join merged in merged derived explain extended select * from (select * from (select * from t1 where f1 < 7 ) tt where f1 > 2 ) x join (select * from (select * from t1 where f1 < 7 ) tt where f1 > 2 ) z on x.f1 = z.f1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 11 100.00 Using where 1 SIMPLE t1 ALL NULL NULL NULL NULL 11 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`t1`.`f1` AS `f1`,`t1`.`f11` AS `f11` from `test`.`t1` join `test`.`t1` where `t1`.`f1` = `test`.`t1`.`f1` and `test`.`t1`.`f1` > 2 and `test`.`t1`.`f1` < 7 and `test`.`t1`.`f1` > 2 and `test`.`t1`.`f1` < 7 select * from (select * from (select * from t1 where f1 < 7 ) tt where f1 > 2 ) x join (select * from (select * from t1 where f1 < 7 ) tt where f1 > 2 ) z on x.f1 = z.f1; f1 f11 f1 f11 3 3 3 3 5 5 5 5 materialized in materialized derived join materialized in materialized derived explain extended select * from (select * from (select * from t1 where f1 < 7 group by f1) tt where f1 > 2 group by f1) x join (select * from (select * from t1 where f1 < 7 group by f1) tt where f1 > 2 group by f1) z on x.f1 = z.f1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 11 100.00 Using where 1 PRIMARY <derived4> ref key0 key0 5 x.f1 2 100.00 4 DERIVED <derived5> ALL NULL NULL NULL NULL 11 100.00 Using where; Using temporary; Using filesort 5 DERIVED t1 ALL NULL NULL NULL NULL 11 100.00 Using where; Using temporary; Using filesort 2 DERIVED <derived3> ALL NULL NULL NULL NULL 11 100.00 Using where; Using temporary; Using filesort 3 DERIVED t1 ALL NULL NULL NULL NULL 11 100.00 Using where; Using temporary; Using filesort Warnings: Note 1003 /* select#1 */ select `x`.`f1` AS `f1`,`x`.`f11` AS `f11`,`z`.`f1` AS `f1`,`z`.`f11` AS `f11` from (/* select#2 */ select `tt`.`f1` AS `f1`,`tt`.`f11` AS `f11` from (/* select#3 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11` from `test`.`t1` where `test`.`t1`.`f1` < 7 and `test`.`t1`.`f1` > 2 group by `test`.`t1`.`f1`) `tt` where `tt`.`f1` > 2 group by `tt`.`f1`) `x` join (/* select#4 */ select `tt`.`f1` AS `f1`,`tt`.`f11` AS `f11` from (/* select#5 */ select `t1`.`f1` AS `f1`,`t1`.`f11` AS `f11` from `test`.`t1` where `t1`.`f1` < 7 and `t1`.`f1` > 2 group by `t1`.`f1`) `tt` where `tt`.`f1` > 2 group by `tt`.`f1`) `z` where `z`.`f1` = `x`.`f1` explain format=json select * from (select * from (select * from t1 where f1 < 7 group by f1) tt where f1 > 2 group by f1) x join (select * from (select * from t1 where f1 < 7 group by f1) tt where f1 > 2 group by f1) z on x.f1 = z.f1; EXPLAIN { "query_block": { "select_id": 1, "table": { "table_name": "<derived2>", "access_type": "ALL", "rows": 11, "filtered": 100, "attached_condition": "x.f1 is not null", "materialized": { "query_block": { "select_id": 2, "filesort": { "sort_key": "tt.f1", "temporary_table": { "table": { "table_name": "<derived3>", "access_type": "ALL", "rows": 11, "filtered": 100, "attached_condition": "tt.f1 > 2", "materialized": { "query_block": { "select_id": 3, "filesort": { "sort_key": "t1.f1", "temporary_table": { "table": { "table_name": "t1", "access_type": "ALL", "rows": 11, "filtered": 100, "attached_condition": "t1.f1 < 7 and t1.f1 > 2" } } } } } } } } } } }, "table": { "table_name": "<derived4>", "access_type": "ref", "possible_keys": ["key0"], "key": "key0", "key_length": "5", "used_key_parts": ["f1"], "ref": ["x.f1"], "rows": 2, "filtered": 100, "materialized": { "query_block": { "select_id": 4, "filesort": { "sort_key": "tt.f1", "temporary_table": { "table": { "table_name": "<derived5>", "access_type": "ALL", "rows": 11, "filtered": 100, "attached_condition": "tt.f1 > 2", "materialized": { "query_block": { "select_id": 5, "filesort": { "sort_key": "t1.f1", "temporary_table": { "table": { "table_name": "t1", "access_type": "ALL", "rows": 11, "filtered": 100, "attached_condition": "t1.f1 < 7 and t1.f1 > 2" } } } } } } } } } } } } } select * from (select * from (select * from t1 where f1 < 7 group by f1) tt where f1 > 2 group by f1) x join (select * from (select * from t1 where f1 < 7 group by f1) tt where f1 > 2 group by f1) z on x.f1 = z.f1; f1 f11 f1 f11 3 3 3 3 5 5 5 5 merged view in materialized derived explain extended select * from (select * from v4 group by 1) tt; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 11 100.00 2 DERIVED t2 ALL NULL NULL NULL NULL 11 100.00 Using where; Using temporary; Using filesort Warnings: Note 1003 /* select#1 */ select `tt`.`f2` AS `f2`,`tt`.`f22` AS `f22` from (/* select#2 */ select `test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t2` where `test`.`t2`.`f2` in (2,3) group by 1) `tt` select * from (select * from v4 group by 1) tt; f2 f22 2 2 3 3 materialized view in merged derived explain extended select * from ( select * from v1 where f1 < 7) tt; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <derived3> ALL NULL NULL NULL NULL 11 100.00 Using where 3 DERIVED t1 ALL NULL NULL NULL NULL 11 100.00 Using where; Using temporary; Using filesort Warnings: Note 1003 /* select#1 */ select `v1`.`f1` AS `f1`,`v1`.`f11` AS `f11` from `test`.`v1` where `v1`.`f1` < 7 explain format=json select * from ( select * from v1 where f1 < 7) tt; EXPLAIN { "query_block": { "select_id": 1, "table": { "table_name": "<derived3>", "access_type": "ALL", "rows": 11, "filtered": 100, "attached_condition": "v1.f1 < 7", "materialized": { "query_block": { "select_id": 3, "filesort": { "sort_key": "t1.f1", "temporary_table": { "table": { "table_name": "t1", "access_type": "ALL", "rows": 11, "filtered": 100, "attached_condition": "t1.f1 < 7" } } } } } } } } select * from ( select * from v1 where f1 < 7) tt; f1 f11 1 1 2 2 3 3 5 5 merged view in a merged view in a merged derived create view v6 as select * from v4 where f2 < 7; explain extended select * from (select * from v6) tt; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 11 100.00 Using where Warnings: Note 1003 select `test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t2` where `test`.`t2`.`f2` < 7 and `test`.`t2`.`f2` in (2,3) select * from (select * from v6) tt; f2 f22 3 3 2 2 materialized view in a merged view in a materialized derived create view v7 as select * from v1; explain extended select * from (select * from v7 group by 1) tt; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 11 100.00 2 DERIVED <derived4> ALL NULL NULL NULL NULL 11 100.00 Using temporary; Using filesort 4 DERIVED t1 ALL NULL NULL NULL NULL 11 100.00 Using temporary; Using filesort Warnings: Note 1003 /* select#1 */ select `tt`.`f1` AS `f1`,`tt`.`f11` AS `f11` from (/* select#2 */ select `v1`.`f1` AS `f1`,`v1`.`f11` AS `f11` from `test`.`v1` group by 1) `tt` select * from (select * from v7 group by 1) tt; f1 f11 1 1 2 2 3 3 5 5 7 7 9 9 11 11 13 13 15 15 17 17 19 19 join of above two explain extended select * from v6 join v7 on f2=f1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 11 100.00 Using where 1 PRIMARY <derived5> ref key0 key0 5 test.t2.f2 2 100.00 5 DERIVED t1 ALL NULL NULL NULL NULL 11 100.00 Using where; Using temporary; Using filesort Warnings: Note 1003 /* select#1 */ select `test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22`,`v1`.`f1` AS `f1`,`v1`.`f11` AS `f11` from `test`.`t2` join `test`.`v1` where `v1`.`f1` = `test`.`t2`.`f2` and `test`.`t2`.`f2` < 7 and `test`.`t2`.`f2` in (2,3) explain format=json select * from v6 join v7 on f2=f1; EXPLAIN { "query_block": { "select_id": 1, "table": { "table_name": "t2", "access_type": "ALL", "rows": 11, "filtered": 100, "attached_condition": "t2.f2 < 7 and t2.f2 in (2,3) and t2.f2 is not null" }, "table": { "table_name": "<derived5>", "access_type": "ref", "possible_keys": ["key0"], "key": "key0", "key_length": "5", "used_key_parts": ["f1"], "ref": ["test.t2.f2"], "rows": 2, "filtered": 100, "materialized": { "query_block": { "select_id": 5, "filesort": { "sort_key": "t1.f1", "temporary_table": { "table": { "table_name": "t1", "access_type": "ALL", "rows": 11, "filtered": 100, "attached_condition": "t1.f1 < 7 and t1.f1 in (2,3)" } } } } } } } } select * from v6 join v7 on f2=f1; f2 f22 f1 f11 3 3 3 3 2 2 2 2 test two keys explain select * from t1 join (select * from t2 group by f2) tt on t1.f1=tt.f2 join t1 xx on tt.f22=xx.f1; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 11 Using where 1 PRIMARY <derived2> ref key0 key0 5 test.t1.f1 2 1 PRIMARY xx ALL NULL NULL NULL NULL 11 Using where; Using join buffer (flat, BNL join) 2 DERIVED t2 ALL NULL NULL NULL NULL 11 Using temporary; Using filesort select * from t1 join (select * from t2 group by f2) tt on t1.f1=tt.f2 join t1 xx on tt.f22=xx.f1; f1 f11 f2 f22 f1 f11 1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3 TODO: Add test with 64 tables mergeable view to test fall back to materialization on tables > MAX_TABLES merge drop table t1,t2; drop view v1,v2,v3,v4,v6,v7; # # LP bug #794909: crash when defining possible keys for # a materialized view/derived_table # CREATE TABLE t1 (f1 int) ; INSERT INTO t1 VALUES (149), (150), (224), (29); CREATE TABLE t2 (f1 int, KEY (f1)); INSERT INTO t2 VALUES (149), (NULL), (224); CREATE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1; EXPLAIN SELECT * FROM v1 JOIN t2 ON v1.f1 = t2.f1; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 index f1 f1 5 NULL 3 Using where; Using index 1 PRIMARY <derived2> ref key0 key0 5 test.t2.f1 2 2 DERIVED t1 ALL NULL NULL NULL NULL 4 SELECT * FROM v1 JOIN t2 ON v1.f1 = t2.f1; f1 f1 149 149 224 224 DROP VIEW v1; DROP TABLE t1,t2; # # LP bug #794890: abort failure on multi-update with view # CREATE TABLE t1 (a int); INSERT INTO t1 VALUES (20), (7); CREATE TABLE t2 (a int); INSERT INTO t2 VALUES (7), (9), (7); CREATE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT a FROM t1; CREATE VIEW v2 AS SELECT t2.a FROM t2, v1 WHERE t2.a=t2.a; UPDATE v2 SET a = 2; SELECT * FROM t2; a 2 2 2 UPDATE t1,v2 SET t1.a = 3; SELECT * FROM t1; a 3 3 DELETE t1 FROM t1,v2; SELECT * FROM t1; a DROP VIEW v1,v2; DROP TABLE t1,t2; # # LP bug #802023: MIN/MAX optimization # for mergeable derived tables and views # CREATE TABLE t1 (a int, b int, c varchar(32), INDEX idx(a,b)); INSERT INTO t1 VALUES (7, 74, 'yyyyyyy'), (9, 97, 'aaaaaaaaa'), (2, 23, 'tt'), (5, 55, 'ddddd'), (2, 27, 'ss'), (7, 76, 'xxxxxxx'), (7, 79, 'zzzzzzz'), (9, 92, 'bbbbbbbbb'), (2, 25, 'pp'), (5, 53, 'eeeee'), (2, 23, 'qq'), (7, 76,'wwwwwww'), (7, 74, 'uuuuuuu'), (9, 92, 'ccccccccc'), (2, 25, 'oo'); CREATE VIEW v1 AS SELECT * FROM t1; SELECT MIN(a) FROM t1 WHERE a >= 5; MIN(a) 5 EXPLAIN SELECT MIN(a) FROM t1 WHERE a >= 5; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away SELECT MIN(a) FROM (SELECT * FROM t1) t WHERE a >= 5; MIN(a) 5 EXPLAIN SELECT MIN(a) FROM(SELECT * FROM t1) t WHERE a >= 5; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away SELECT MIN(a) FROM v1 WHERE a >= 5; MIN(a) 5 EXPLAIN SELECT MIN(a) FROM v1 WHERE a >= 5; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away SELECT MAX(b) FROM t1 WHERE a=7 AND b<75; MAX(b) 74 EXPLAIN SELECT MAX(b) FROM t1 WHERE a=7 AND b<75; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away SELECT MAX(b) FROM (SELECT * FROM t1) t WHERE a=7 AND b<75; MAX(b) 74 EXPLAIN SELECT MAX(b) FROM (SELECT * FROM t1) t WHERE a=7 AND b<75; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away SELECT MAX(b) FROM v1 WHERE a=7 AND b<75; MAX(b) 74 EXPLAIN SELECT MAX(b) FROM v1 WHERE a=7 AND b<75; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away DROP VIEW v1; DROP TABLE t1; # # LP bug #800535: GROUP BY query with nested left join # and a derived table in the nest # CREATE TABLE t1 (a int) ; INSERT INTO t1 VALUES (1), (2); CREATE TABLE t2 (a int NOT NULL); INSERT INTO t2 VALUES (1), (2); CREATE TABLE t3 (a int, b int); INSERT INTO t3 VALUES (3,3), (4,4); EXPLAIN EXTENDED SELECT t.a FROM t1 LEFT JOIN (t2 t JOIN t3 ON t3.b > 5) ON t.a >= 1 GROUP BY t.a; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort 1 SIMPLE t ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where Warnings: Note 1003 select `test`.`t`.`a` AS `a` from `test`.`t1` left join (`test`.`t2` `t` join `test`.`t3`) on(`test`.`t`.`a` >= 1 and `test`.`t3`.`b` > 5) where 1 group by `test`.`t`.`a` SELECT t.a FROM t1 LEFT JOIN (t2 t JOIN t3 ON t3.b > 5) ON t.a >= 1 GROUP BY t.a; a NULL EXPLAIN EXTENDED SELECT t.a FROM t1 LEFT JOIN (( SELECT * FROM t2 ) t JOIN t3 ON t3.b > 5) ON t.a >= 1 GROUP BY t.a; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` left join (`test`.`t2` join `test`.`t3`) on(`test`.`t2`.`a` >= 1 and `test`.`t3`.`b` > 5) where 1 group by `test`.`t2`.`a` SELECT t.a FROM t1 LEFT JOIN (( SELECT * FROM t2 ) t JOIN t3 ON t3.b > 5) ON t.a >= 1 GROUP BY t.a; a NULL CREATE VIEW v1 AS SELECT * FROM t2; EXPLAIN EXTENDED SELECT t.a FROM t1 LEFT JOIN (v1 t JOIN t3 ON t3.b > 5) ON t.a >= 1 GROUP BY t.a; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` left join (`test`.`t2` join `test`.`t3`) on(`test`.`t2`.`a` >= 1 and `test`.`t3`.`b` > 5) where 1 group by `test`.`t2`.`a` SELECT t.a FROM t1 LEFT JOIN (v1 t JOIN t3 ON t3.b > 5) ON t.a >= 1 GROUP BY t.a; a NULL DROP VIEW v1; DROP TABLE t1,t2,t3; # # LP bug #803410: materialized view/dt accessed by two-component key # CREATE TABLE t1 (a varchar(1)); INSERT INTO t1 VALUES ('c'); CREATE TABLE t2 (a varchar(1) , KEY (a)) ; INSERT INTO t2 VALUES ('c'), (NULL), ('r'); CREATE TABLE t3 (a varchar(1), b varchar(1)); INSERT INTO t3 VALUES ('e', 'c'), ('c', 'c'), ('c', 'r'), ('g', 'a'), ('b', 'x'), ('b', 'y'), ('h', 'w'), ('d', 'z'), ('k', 'v'), ('j', 's'), ('m', 'p'), ('l', 'q'); CREATE VIEW v1 AS SELECT a, MIN(b) AS b FROM t3 GROUP BY a; EXPLAIN SELECT * FROM t1, t2, v1 WHERE t2.a=t1.a AND t2.a=v1.a AND t2.a=v1.b; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 1 PRIMARY t2 ref a a 4 const 1 Using index 1 PRIMARY <derived2> ref key0 key0 8 const,const 1 2 DERIVED t3 ALL NULL NULL NULL NULL 12 Using temporary; Using filesort SELECT * FROM t1, t2, v1 WHERE t2.a=t1.a AND t2.a=v1.a AND t2.a=v1.b; a a a b c c c c DROP VIEW v1; DROP TABLE t1,t2,t3; # # LP bug #802845: select from derived table with limit 0 # SELECT * FROM (SELECT 1 LIMIT 0) t; 1 CREATE TABLE t1 (a int); INSERT INTO t1 VALUES (7), (1), (3); SELECT * FROM (SELECT * FROM t1 LIMIT 0) t; a DROP TABLE t1; # # LP bug #803851: materialized view + IN->EXISTS # SET SESSION optimizer_switch='semijoin=off,derived_with_keys=on,materialization=off'; CREATE TABLE t1 (a int, b int); INSERT INTO t1 VALUES (2,2), (3,3), (1,1); CREATE TABLE t2 (a int); INSERT INTO t2 VALUES (1), (2), (1); CREATE TABLE t3 (a int); INSERT INTO t3 VALUES (3), (1), (2), (1); CREATE VIEW v1 AS SELECT a, MAX(b) AS b FROM t1 GROUP BY a; EXPLAIN EXTENDED SELECT * FROM t3 WHERE t3.a IN (SELECT v1.a FROM v1, t2 WHERE t2.a = v1.b); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 4 100.00 Using where 2 DEPENDENT SUBQUERY <derived3> ref key1 key1 5 func 2 100.00 2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) 3 DERIVED t1 ALL NULL NULL NULL NULL 3 100.00 Using temporary; Using filesort Warnings: Note 1003 /* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <expr_cache><`test`.`t3`.`a`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(/* select#2 */ select `v1`.`a` from `test`.`v1` join `test`.`t2` where `test`.`t2`.`a` = `v1`.`b` and <cache>(`test`.`t3`.`a`) = `v1`.`a`))) SELECT * FROM t3 WHERE t3.a IN (SELECT v1.a FROM v1, t2 WHERE t2.a = v1.b); a 1 2 1 SET SESSION optimizer_switch=@save_optimizer_switch; DROP VIEW v1; DROP TABLE t1,t2,t3; # # LP bug #804515: materialized derived + ORDER BY # CREATE TABLE t1 (f1 varchar(1), f2 varchar(1), KEY (f2)); INSERT INTO t1 VALUES ('r','x'), ('x','d'), ('x','r'), ('r','f'), ('x','x'); CREATE TABLE t2 (f1 varchar(1), f2 varchar(1)); INSERT INTO t2 VALUES ('s','x'); CREATE TABLE t3 (f1 varchar(1), f2 varchar(1), KEY (f2)); INSERT INTO t3 VALUES (NULL,'x'), (NULL,'f'), ('t','p'), (NULL,'j'), ('g','c'); CREATE TABLE t4 (f1 int, f2 varchar(1), KEY (f2,f1)) ; INSERT INTO t4 VALUES (1,'x'), (5,'r'); EXPLAIN SELECT t.f1 AS f FROM (SELECT DISTINCT t1.* FROM t1,t2 WHERE t2.f2 = t1.f2) t,t3,t4 WHERE t4.f2 = t3.f2 AND t4.f2 = t.f1 ORDER BY f; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 Using where; Using filesort 1 PRIMARY t4 ref f2 f2 4 t.f1 1 Using index 1 PRIMARY t3 ref f2 f2 4 t.f1 2 Using index 2 DERIVED t2 system NULL NULL NULL NULL 1 Using temporary 2 DERIVED t1 ref f2 f2 4 const 2 Using where SELECT t.f1 AS f FROM (SELECT DISTINCT t1.* FROM t1,t2 WHERE t2.f2 = t1.f2) t,t3,t4 WHERE t4.f2 = t3.f2 AND t4.f2 = t.f1 ORDER BY f; f x DROP TABLE t1,t2,t3,t4; # # LP bug #806431: join over materialized derived with key # CREATE TABLE t1 (a int, b int); INSERT INTO t1 VALUES (0,0),(3,0),(1,0); CREATE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT a,b FROM t1 ; SET SESSION optimizer_switch='derived_with_keys=off'; SELECT * FROM t1 AS t JOIN v1 AS v WHERE t.a = v.b AND t.b = v.b; a b a b 0 0 0 0 0 0 3 0 0 0 1 0 SET SESSION optimizer_switch='derived_with_keys=on'; EXPLAIN SELECT * FROM t1 AS t JOIN v1 AS v WHERE t.a = v.b AND t.b = v.b; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t ALL NULL NULL NULL NULL 3 Using where 1 PRIMARY <derived2> ref key0 key0 5 test.t.a 2 2 DERIVED t1 ALL NULL NULL NULL NULL 3 SELECT * FROM t1 AS t JOIN v1 AS v WHERE t.a = v.b AND t.b = v.b; a b a b 0 0 1 0 0 0 3 0 0 0 0 0 SET SESSION optimizer_switch=@save_optimizer_switch; DROP VIEW v1; DROP TABLE t1; # # LP bug #806477: left join over merged join with # where condition containing f=f # CREATE TABLE t1 (a int NOT NULL); INSERT INTO t1 VALUES (1), (50), (0); CREATE TABLE t2 (a int); CREATE TABLE t3 (a int, b int); INSERT INTO t3 VALUES (76,2), (1,NULL); CREATE VIEW v1 AS SELECT * FROM t1; SELECT t3.b, v1.a FROM t3 LEFT JOIN (t2, v1) ON t3.a <> 0 WHERE v1.a = v1.a OR t3.b <> 0; b a 2 NULL EXPLAIN EXTENDED SELECT t3.b, v1.a FROM t3 LEFT JOIN (t2, v1) ON t3.a <> 0 WHERE v1.a = v1.a OR t3.b <> 0; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 1 SIMPLE t2 ALL NULL NULL NULL NULL 0 0.00 Using where 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where Warnings: Note 1003 select `test`.`t3`.`b` AS `b`,`test`.`t1`.`a` AS `a` from `test`.`t3` left join (`test`.`t2` join `test`.`t1`) on(`test`.`t3`.`a` <> 0) where `test`.`t1`.`a` = `test`.`t1`.`a` or `test`.`t3`.`b` <> 0 DROP VIEW v1; DROP TABLE t1,t2,t3; # # LP bug #806510: subquery with outer reference # to a derived_table/view # CREATE TABLE t1 (a int) ; INSERT INTO t1 VALUES (4), (NULL); CREATE TABLE t2 (a int) ; INSERT INTO t2 VALUES (8), (0); CREATE TABLE t3 (a int, b int) ; INSERT INTO t3 VALUES (7,8); CREATE VIEW v1 AS SELECT * FROM t1; SELECT * FROM t1 t WHERE EXISTS (SELECT t3.a FROM t3, t2 WHERE t2.a = t3.b AND t.a != 0); a 4 EXPLAIN SELECT * FROM t1 t WHERE EXISTS (SELECT t3.a FROM t3, t2 WHERE t2.a = t3.b AND t.a != 0); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t ALL NULL NULL NULL NULL 2 Using where 2 DEPENDENT SUBQUERY t3 system NULL NULL NULL NULL 1 2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where SELECT * FROM (SELECT * FROM t1) t WHERE EXISTS (SELECT t3.a FROM t3, t2 WHERE t2.a = t3.b AND t.a != 0); a 4 EXPLAIN SELECT * FROM (SELECT * FROM t1) t WHERE EXISTS (SELECT t3.a FROM t3, t2 WHERE t2.a = t3.b AND t.a != 0); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where 3 DEPENDENT SUBQUERY t3 system NULL NULL NULL NULL 1 3 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where SELECT * FROM v1 t WHERE EXISTS (SELECT t3.a FROM t3, t2 WHERE t2.a = t3.b AND t.a != 0); a 4 EXPLAIN SELECT * FROM v1 t WHERE EXISTS (SELECT t3.a FROM t3, t2 WHERE t2.a = t3.b AND t.a != 0); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where 2 DEPENDENT SUBQUERY t3 system NULL NULL NULL NULL 1 2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where DROP VIEW v1; DROP TABLE t1,t2,t3; # # LP bug #806097: left join over a view + DISTINCT # CREATE TABLE t1 (a int, b int); INSERT INTO t1 VALUES (252,6), (232,0), (174,232); CREATE TABLE t2 (a int); INSERT INTO t2 VALUES (232), (174); CREATE TABLE t3 (c int); INSERT INTO t3 VALUES (1), (2); CREATE VIEW v1 AS SELECT t2.a FROM t3,t2; SELECT v1.a FROM t1 LEFT JOIN v1 ON t1.b = 0; a NULL 232 174 232 174 NULL SELECT DISTINCT t2.a FROM t1 LEFT JOIN (t3,t2) ON t1.b = 0; a NULL 232 174 EXPLAIN SELECT DISTINCT t2.a FROM t1 LEFT JOIN (t3,t2) ON t1.b = 0; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 SELECT DISTINCT v1.a FROM t1 LEFT JOIN v1 ON t1.b = 0; a NULL 232 174 EXPLAIN SELECT DISTINCT v1.a FROM t1 LEFT JOIN v1 ON t1.b = 0; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 DROP VIEW v1; DROP TABLE t1,t2,t3; # # LP bug #806504: right join over a view/derived table # CREATE TABLE t1 (a int, b int) ; INSERT INTO t1 VALUES (0,0); CREATE TABLE t2 (a int) ; INSERT INTO t2 VALUES (0), (0); CREATE VIEW v1 AS SELECT * FROM t1; SELECT * FROM t2 RIGHT JOIN (SELECT * FROM t1) AS t ON t.a != 0 WHERE t.a IN (SELECT b FROM t1); a a b NULL 0 0 EXPLAIN EXTENDED SELECT * FROM t2 RIGHT JOIN (SELECT * FROM t1) AS t ON t.a != 0 WHERE t.a IN (SELECT b FROM t1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 100.00 1 PRIMARY t1 system NULL NULL NULL NULL 1 100.00 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00 Using where Warnings: Note 1003 select `test`.`t2`.`a` AS `a`,0 AS `a`,0 AS `b` from `test`.`t2` semi join (dual) where 1 SELECT * FROM t2 RIGHT JOIN v1 AS t ON t.a != 0 WHERE t.a IN (SELECT b FROM t1); a a b NULL 0 0 EXPLAIN EXTENDED SELECT * FROM t2 RIGHT JOIN v1 AS t ON t.a != 0 WHERE t.a IN (SELECT b FROM t1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 100.00 1 PRIMARY t1 system NULL NULL NULL NULL 1 100.00 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00 Using where Warnings: Note 1003 select `test`.`t2`.`a` AS `a`,0 AS `a`,0 AS `b` from `test`.`t2` semi join (dual) where 1 DROP VIEW v1; DROP TABLE t1,t2; # # LP bug #809206: DISTINCT in derived table / view # CREATE TABLE t1 (a int) ; INSERT INTO t1 VALUES (0); CREATE TABLE t2 (a varchar(32), b int, KEY (a)) ; INSERT INTO t2 VALUES ('j',28), ('c',29), ('i',26), ('c',29), ('k',27), ('j',28), ('c',29), ('i',25), ('d',26), ('k',27), ('n',28), ('d',29), ('m',26), ('e',29), ('p',27), ('w',28), ('x',29), ('y',25), ('z',26), ('s',27); CREATE TABLE t3 (a varchar(32)); INSERT INTO t3 VALUES ('j'), ('c'); CREATE VIEW v1 AS SELECT DISTINCT t2.b FROM t1,t2,t3 WHERE t3.a = t2.a; SELECT DISTINCT t2.b FROM t1,t2,t3 WHERE t3.a = t2.a; b 28 29 EXPLAIN SELECT DISTINCT t2.b FROM t1,t2,t3 WHERE t3.a = t2.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 Using temporary 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t2 ref a a 35 test.t3.a 2 SELECT * FROM (SELECT DISTINCT t2.b FROM t1,t2,t3 WHERE t3.a = t2.a) t; b 28 29 EXPLAIN SELECT * FROM (SELECT DISTINCT t2.b FROM t1,t2,t3 WHERE t3.a = t2.a) t; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 4 2 DERIVED t1 system NULL NULL NULL NULL 1 Using temporary 2 DERIVED t3 ALL NULL NULL NULL NULL 2 Using where 2 DERIVED t2 ref a a 35 test.t3.a 2 SELECT * FROM v1; b 28 29 EXPLAIN SELECT * FROM v1; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 4 2 DERIVED t1 system NULL NULL NULL NULL 1 Using temporary 2 DERIVED t3 ALL NULL NULL NULL NULL 2 Using where 2 DERIVED t2 ref a a 35 test.t3.a 2 DROP VIEW v1; DROP TABLE t1,t2,t3; # # LP bug #809179: right join over a derived table / view # CREATE TABLE t1 (a int, b int); INSERT INTO t1 VALUES (6,5); CREATE TABLE t2 (a int, b int); INSERT INTO t2 VALUES (1,0); CREATE TABLE t3 (a int, b int); INSERT INTO t3 VALUES (6,5); CREATE VIEW v1 AS SELECT * FROM t1; SELECT t.a,t.b FROM t3 RIGHT JOIN (t1 AS t, t2) ON t2.b != 0 WHERE (t.a,t.b) NOT IN (SELECT 7, 5); a b 6 5 EXPLAIN EXTENDED SELECT t.a,t.b FROM t3 RIGHT JOIN (t1 AS t, t2) ON t2.b != 0 WHERE (t.a,t.b) NOT IN (SELECT 7, 5); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t system NULL NULL NULL NULL 1 100.00 1 PRIMARY t2 system NULL NULL NULL NULL 1 100.00 1 PRIMARY t3 system NULL NULL NULL NULL 1 100.00 2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used Warnings: Note 1003 /* select#1 */ select 6 AS `a`,5 AS `b` from `test`.`t3` where 1 SELECT t.a,t.b FROM t3 RIGHT JOIN ((SELECT * FROM t1) AS t, t2) ON t2.b != 0 WHERE (t.a,t.b) NOT IN (SELECT 7, 5); a b 6 5 EXPLAIN EXTENDED SELECT t.a,t.b FROM t3 RIGHT JOIN ((SELECT * FROM t1) AS t, t2) ON t2.b != 0 WHERE (t.a,t.b) NOT IN (SELECT 7, 5); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 100.00 1 PRIMARY t2 system NULL NULL NULL NULL 1 100.00 1 PRIMARY t3 system NULL NULL NULL NULL 1 100.00 3 SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used Warnings: Note 1003 /* select#1 */ select 6 AS `a`,5 AS `b` from `test`.`t3` where 1 SELECT t.a,t.b FROM t3 RIGHT JOIN (v1 AS t, t2) ON t2.b != 0 WHERE (t.a,t.b) NOT IN (SELECT 7, 5); a b 6 5 EXPLAIN EXTENDED SELECT t.a,t.b FROM t3 RIGHT JOIN (v1 AS t, t2) ON t2.b != 0 WHERE (t.a,t.b) NOT IN (SELECT 7, 5); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 100.00 1 PRIMARY t2 system NULL NULL NULL NULL 1 100.00 1 PRIMARY t3 system NULL NULL NULL NULL 1 100.00 2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used Warnings: Note 1003 /* select#1 */ select 6 AS `a`,5 AS `b` from `test`.`t3` where 1 DROP VIEW v1; DROP TABLE t1,t2,t3; # # LP bug #794901: insert into a multi-table view # CREATE TABLE t1 (a int); CREATE TABLE t2 (a int); CREATE TABLE t3 (a int); CREATE VIEW v1 AS SELECT t1.a FROM t1,t2; CREATE VIEW v2 AS SELECT a FROM t2 GROUP BY a; CREATE VIEW v3 AS SELECT v1.a FROM v1,v2; INSERT INTO v3(a) VALUES (1); ERROR HY000: The target table v3 of the INSERT is not insertable-into DROP VIEW v1,v2,v3; DROP TABLE t1,t2,t3; # # LP bug #793448: materialized view accessed by two-component key # CREATE TABLE t1 (a int, b int); INSERT INTO t1 VALUES (9,3), (2,5); CREATE TABLE t2 (a int, b int); INSERT INTO t2 VALUES (9,3), (3,7), (9,1), (2,5), (2,4), (3,8); CREATE TABLE t3 (a int, b int); INSERT INTO t3 VALUES (10,3), (9,7), (9,1), (2,4); CREATE VIEW v1(a,b) AS SELECT a, MAX(b) FROM t2 GROUP BY a; CREATE VIEW v2(a,b) AS SELECT a,b FROM t2 UNION SELECT a,b FROM t3; SELECT * FROM v1; a b 2 5 3 8 9 3 SELECT a FROM t1 WHERE (a,b) IN (SELECT * FROM v1); a 9 2 EXPLAIN SELECT a FROM t1 WHERE (a,b) IN (SELECT * FROM v1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where 1 PRIMARY <derived3> ref key0 key0 10 test.t1.a,test.t1.b 2 FirstMatch(t1) 3 DERIVED t2 ALL NULL NULL NULL NULL 6 Using temporary; Using filesort SELECT * FROM v2; a b 9 3 3 7 9 1 2 5 2 4 3 8 10 3 9 7 SELECT a FROM t1 WHERE (a,b) IN (SELECT * FROM v2); a 9 2 EXPLAIN SELECT a FROM t1 WHERE (a,b) IN (SELECT * FROM v2); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where 1 PRIMARY <derived3> ref key0 key0 10 test.t1.a,test.t1.b 1 FirstMatch(t1) 3 DERIVED t2 ALL NULL NULL NULL NULL 6 4 UNION t3 ALL NULL NULL NULL NULL 4 NULL UNION RESULT <union3,4> ALL NULL NULL NULL NULL NULL DROP VIEW v1,v2; DROP TABLE t1,t2,t3; # # LP bug #804686: query over a derived table using a view # with a degenerated where condition # CREATE TABLE t1 (a int, b int); INSERT INTO t1 VALUES (0,0), (1,0), (0,0), (1,1), (1,0); CREATE VIEW v1 AS SELECT a,b FROM t1; CREATE VIEW v2 AS SELECT a, MAX(b) AS b FROM t1 GROUP BY a; SELECT * FROM (SELECT b FROM v1 WHERE b = 0) t WHERE b<>0; b SELECT * FROM (SELECT b FROM v2 WHERE b = 0) t WHERE b<>0; b SELECT * FROM (SELECT b FROM v1 WHERE b = 0) t WHERE b; b SELECT * FROM (SELECT b FROM v2 WHERE b = 0) t WHERE b; b EXPLAIN EXTENDED SELECT * FROM (SELECT b FROM v1 WHERE b = 0) t WHERE b; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE Warnings: Note 1003 select `test`.`t1`.`b` AS `b` from `test`.`t1` where 0 EXPLAIN EXTENDED SELECT * FROM (SELECT b FROM v2 WHERE b = 0) t WHERE b; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE 3 DERIVED t1 ALL NULL NULL NULL NULL 5 100.00 Using temporary; Using filesort Warnings: Note 1003 /* select#1 */ select `v2`.`b` AS `b` from `test`.`v2` where 0 DROP VIEW v1,v2; DROP TABLE t1; # # LP bug #819716: crash with embedded tableless materialized derived # with a variable # set optimizer_switch='derived_merge=off'; EXPLAIN SELECT * FROM (SELECT * FROM (SELECT @b) AS t) AS s; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> system NULL NULL NULL NULL 1 2 DERIVED <derived3> system NULL NULL NULL NULL 1 3 DERIVED NULL NULL NULL NULL NULL NULL NULL No tables used SELECT * FROM (SELECT * FROM (SELECT @b) AS t) AS s; @b NULL set optimizer_switch='derived_merge=on'; # # LP bug #823826: view over join + IS NULL in WHERE # CREATE TABLE t1 (a int) ; INSERT INTO t1 VALUES (1), (1); CREATE TABLE t2 (b int) ; INSERT INTO t2 VALUES (9), (NULL), (7); CREATE VIEW v1 AS SELECT * FROM t1,t2; EXPLAIN SELECT * FROM (SELECT * FROM t1,t2) t WHERE b IS NULL; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) SELECT * FROM (SELECT * FROM t1,t2) t WHERE b IS NULL; a b 1 NULL 1 NULL EXPLAIN SELECT * FROM v1 WHERE b IS NULL; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) SELECT * FROM v1 WHERE b IS NULL; a b 1 NULL 1 NULL DROP VIEW v1; DROP TABLE t1,t2; # # LP bug #823835: a duplicate of #823189 with derived table # CREATE TABLE t1 (a varchar(32)) ; INSERT INTO t1 VALUES ('r'), ('p'); CREATE TABLE t2 (a int NOT NULL, b varchar(32)) ; INSERT INTO t2 VALUES (28,'j'); CREATE TABLE t3 (a int); INSERT INTO t3 VALUES (0), (0); EXPLAIN EXTENDED SELECT * FROM (SELECT * FROM t1) AS t WHERE EXISTS (SELECT t2.a FROM t3 RIGHT JOIN t2 ON (t3.a = t2.a) WHERE t2.b < t.a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 Using where 3 DEPENDENT SUBQUERY t2 system NULL NULL NULL NULL 1 100.00 3 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 2 100.00 Using where Warnings: Note 1276 Field or reference 't.a' of SELECT #3 was resolved in SELECT #1 Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where <in_optimizer>(1,<expr_cache><`test`.`t1`.`a`>(exists(/* select#3 */ select 28 from `test`.`t3` where 'j' < `test`.`t1`.`a`))) SELECT * FROM (SELECT * FROM t1) AS t WHERE EXISTS (SELECT t2.a FROM t3 RIGHT JOIN t2 ON (t3.a = t2.a) WHERE t2.b < t.a); a r p DROP TABLE t1,t2,t3; # # LP bug #824463: nested outer join using a merged view # as an inner table # CREATE TABLE t1 (b int, a int) ; CREATE TABLE t2 (a int) ; INSERT INTO t2 VALUES (5), (6); CREATE TABLE t3 (a int , c int) ; INSERT INTO t3 VALUES (22,1), (23,-1); CREATE TABLE t4 (a int); CREATE TABLE t5 (d int) ; INSERT INTO t5 VALUES (0), (7), (3), (5); CREATE VIEW v2 AS SELECT * FROM t2; CREATE VIEW v3 AS SELECT * FROM t3; EXPLAIN EXTENDED SELECT STRAIGHT_JOIN * FROM ( t2 AS s2 JOIN ( t3 AS s3 LEFT JOIN ( t4 LEFT JOIN t3 ON t4.a != 0 ) ON s3.a != 0) ON s2.a != 0) JOIN t5 ON s3.c != 0 AND t5.d = 0; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE s2 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE s3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t4 ALL NULL NULL NULL NULL 0 0.00 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t5 ALL NULL NULL NULL NULL 4 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select straight_join `test`.`s2`.`a` AS `a`,`test`.`s3`.`a` AS `a`,`test`.`s3`.`c` AS `c`,`test`.`t4`.`a` AS `a`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`c` AS `c`,`test`.`t5`.`d` AS `d` from `test`.`t2` `s2` join `test`.`t3` `s3` left join (`test`.`t4` left join `test`.`t3` on(`test`.`t4`.`a` <> 0)) on(`test`.`s3`.`a` <> 0) join `test`.`t5` where `test`.`t5`.`d` = 0 and `test`.`s3`.`c` <> 0 and `test`.`s2`.`a` <> 0 SELECT STRAIGHT_JOIN * FROM ( t2 AS s2 JOIN ( t3 AS s3 LEFT JOIN ( t4 LEFT JOIN t3 ON t4.a != 0 ) ON s3.a != 0) ON s2.a != 0) JOIN t5 ON s3.c != 0 AND t5.d = 0; a a c a a c d 5 22 1 NULL NULL NULL 0 6 22 1 NULL NULL NULL 0 5 23 -1 NULL NULL NULL 0 6 23 -1 NULL NULL NULL 0 EXPLAIN EXTENDED SELECT STRAIGHT_JOIN * FROM t2 AS s2 , t5, (t3 LEFT JOIN (t4 LEFT JOIN t3 AS s3 ON t4.a != 0) ON t3.a != 0) WHERE s2.a != 0 AND t3.c != 0 AND t5.d = 0; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE s2 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t5 ALL NULL NULL NULL NULL 4 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t4 ALL NULL NULL NULL NULL 0 0.00 Using where 1 SIMPLE s3 ALL NULL NULL NULL NULL 2 100.00 Using where Warnings: Note 1003 select straight_join `test`.`s2`.`a` AS `a`,`test`.`t5`.`d` AS `d`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`c` AS `c`,`test`.`t4`.`a` AS `a`,`test`.`s3`.`a` AS `a`,`test`.`s3`.`c` AS `c` from `test`.`t2` `s2` join `test`.`t5` join `test`.`t3` left join (`test`.`t4` left join `test`.`t3` `s3` on(`test`.`t4`.`a` <> 0)) on(`test`.`t3`.`a` <> 0) where `test`.`t5`.`d` = 0 and `test`.`s2`.`a` <> 0 and `test`.`t3`.`c` <> 0 SELECT STRAIGHT_JOIN * FROM t2 AS s2 , t5, (t3 LEFT JOIN (t4 LEFT JOIN t3 AS s3 ON t4.a != 0) ON t3.a != 0) WHERE s2.a != 0 AND t3.c != 0 AND t5.d = 0; a d a c a a c 5 0 22 1 NULL NULL NULL 6 0 22 1 NULL NULL NULL 5 0 23 -1 NULL NULL NULL 6 0 23 -1 NULL NULL NULL EXPLAIN EXTENDED SELECT STRAIGHT_JOIN * FROM v2 AS s2 , t5, (t3 LEFT JOIN (t4 LEFT JOIN v3 AS s3 ON t4.a != 0) ON t3.a != 0) WHERE s2.a != 0 AND t3.c != 0 AND t5.d = 0; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t5 ALL NULL NULL NULL NULL 4 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t4 ALL NULL NULL NULL NULL 0 0.00 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where Warnings: Note 1003 select straight_join `test`.`t2`.`a` AS `a`,`test`.`t5`.`d` AS `d`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`c` AS `c`,`test`.`t4`.`a` AS `a`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`c` AS `c` from `test`.`t2` join `test`.`t5` join `test`.`t3` left join (`test`.`t4` left join (`test`.`t3`) on(`test`.`t4`.`a` <> 0)) on(`test`.`t3`.`a` <> 0) where `test`.`t5`.`d` = 0 and `test`.`t2`.`a` <> 0 and `test`.`t3`.`c` <> 0 SELECT STRAIGHT_JOIN * FROM v2 AS s2 , t5, (t3 LEFT JOIN (t4 LEFT JOIN v3 AS s3 ON t4.a != 0) ON t3.a != 0) WHERE s2.a != 0 AND t3.c != 0 AND t5.d = 0; a d a c a a c 5 0 22 1 NULL NULL NULL 6 0 22 1 NULL NULL NULL 5 0 23 -1 NULL NULL NULL 6 0 23 -1 NULL NULL NULL SELECT STRAIGHT_JOIN * FROM ( ( t2 AS s2 LEFT JOIN ( t3 AS s3 LEFT JOIN ( t4 AS s4 JOIN t3 ON s4.a != 0) ON s3.a != 0 ) ON s2.a != 0) LEFT JOIN t1 AS s1 ON s1.a != 0) JOIN t5 ON s3.c != 0; a a c a a c b a d 5 22 1 NULL NULL NULL NULL NULL 0 6 22 1 NULL NULL NULL NULL NULL 0 5 23 -1 NULL NULL NULL NULL NULL 0 6 23 -1 NULL NULL NULL NULL NULL 0 5 22 1 NULL NULL NULL NULL NULL 7 6 22 1 NULL NULL NULL NULL NULL 7 5 23 -1 NULL NULL NULL NULL NULL 7 6 23 -1 NULL NULL NULL NULL NULL 7 5 22 1 NULL NULL NULL NULL NULL 3 6 22 1 NULL NULL NULL NULL NULL 3 5 23 -1 NULL NULL NULL NULL NULL 3 6 23 -1 NULL NULL NULL NULL NULL 3 5 22 1 NULL NULL NULL NULL NULL 5 6 22 1 NULL NULL NULL NULL NULL 5 5 23 -1 NULL NULL NULL NULL NULL 5 6 23 -1 NULL NULL NULL NULL NULL 5 SELECT STRAIGHT_JOIN * FROM ( ( v2 AS s2 LEFT JOIN ( v3 AS s3 LEFT JOIN ( t4 AS s4 JOIN v3 ON s4.a != 0) ON s3.a != 0 ) ON s2.a != 0) LEFT JOIN t1 AS s1 ON s1.a != 0) JOIN t5 ON s3.c != 0; a a c a a c b a d 5 22 1 NULL NULL NULL NULL NULL 0 6 22 1 NULL NULL NULL NULL NULL 0 5 23 -1 NULL NULL NULL NULL NULL 0 6 23 -1 NULL NULL NULL NULL NULL 0 5 22 1 NULL NULL NULL NULL NULL 7 6 22 1 NULL NULL NULL NULL NULL 7 5 23 -1 NULL NULL NULL NULL NULL 7 6 23 -1 NULL NULL NULL NULL NULL 7 5 22 1 NULL NULL NULL NULL NULL 3 6 22 1 NULL NULL NULL NULL NULL 3 5 23 -1 NULL NULL NULL NULL NULL 3 6 23 -1 NULL NULL NULL NULL NULL 3 5 22 1 NULL NULL NULL NULL NULL 5 6 22 1 NULL NULL NULL NULL NULL 5 5 23 -1 NULL NULL NULL NULL NULL 5 6 23 -1 NULL NULL NULL NULL NULL 5 DROP VIEW v2,v3; DROP TABLE t1,t2,t3,t4,t5; # # LP bug #872735: derived used in a NOT IN subquery # CREATE TABLE t1 (b int NOT NULL); INSERT INTO t1 VALUES (9), (7); CREATE TABLE t2 (a int NOT NULL) ; INSERT INTO t2 VALUES (1), (2); CREATE TABLE t3 ( a int NOT NULL , c int NOT NULL, d varchar(1) NOT NULL, KEY (c,a) , PRIMARY KEY (a) ); INSERT INTO t3 VALUES (14,4,'a'), (15,7,'b'), (16,4,'c'), (17,1,'d'), (18,9,'e'), (19,4,'f'), (20,8,'g'); SET SESSION optimizer_switch='derived_merge=on,subquery_cache=off,materialization=off'; # The following two EXPLAINs must return the same execution plan EXPLAIN SELECT * FROM t1 , t2 WHERE (t2.a ,t1.b) NOT IN (SELECT DISTINCT c,a FROM t3 t); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join) 2 DEPENDENT SUBQUERY t unique_subquery PRIMARY,c PRIMARY 4 func 1 Using where EXPLAIN SELECT * FROM t1 , t2 WHERE (t2.a ,t1.b) NOT IN (SELECT DISTINCT c,a FROM (SELECT * FROM t3) t); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join) 2 DEPENDENT SUBQUERY t3 unique_subquery PRIMARY,c PRIMARY 4 func 1 Using where SELECT * FROM t1 , t2 WHERE (t2.a ,t1.b) NOT IN (SELECT DISTINCT c,a FROM (SELECT * FROM t3) t); b a 9 1 7 1 9 2 7 2 DROP TABLE t1,t2,t3; # # LP bug #874006: materialized view used in IN subquery # CREATE TABLE t3 (a int NOT NULL, b varchar(1), c varchar(1)); INSERT INTO t3 VALUES (19,NULL,NULL), (20,'r','r'); CREATE TABLE t1 (a int, b varchar(1) , c varchar(1)); INSERT INTO t1 VALUES (1,NULL,NULL), (5,'r','r'), (7,'y','y'); CREATE TABLE t2 (a int NOT NULL , b int, c varchar(1)); INSERT INTO t2 VALUES (4,3,'r'); CREATE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1; SET @save_optimizer_switch=@@optimizer_switch; SET optimizer_switch='semijoin_with_cache=off'; SET SESSION optimizer_switch='derived_with_keys=off'; EXPLAIN SELECT * FROM t3 WHERE t3.b IN (SELECT v1.b FROM v1, t2 WHERE t2.c = v1.c AND t2.c = v1.b AND v1.b = t3.c); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 system NULL NULL NULL NULL 1 1 PRIMARY t3 ALL NULL NULL NULL NULL 2 Using where 1 PRIMARY <derived3> ALL NULL NULL NULL NULL 3 Using where; Start temporary; End temporary 3 DERIVED t1 ALL NULL NULL NULL NULL 3 Using where SELECT * FROM t3 WHERE t3.b IN (SELECT v1.b FROM v1, t2 WHERE t2.c = v1.c AND t2.c = v1.b AND v1.b = t3.c); a b c 20 r r SET SESSION optimizer_switch='derived_with_keys=on'; EXPLAIN SELECT * FROM t3 WHERE t3.b IN (SELECT v1.b FROM v1, t2 WHERE t2.c = v1.c AND t2.c = v1.b AND v1.b = t3.c); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 system NULL NULL NULL NULL 1 1 PRIMARY <derived3> ref key1 key1 8 const,const 0 Start temporary 1 PRIMARY t3 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (flat, BNL join) 3 DERIVED t1 ALL NULL NULL NULL NULL 3 Using where SELECT * FROM t3 WHERE t3.b IN (SELECT v1.b FROM v1, t2 WHERE t2.c = v1.c AND t2.c = v1.b AND v1.b = t3.c); a b c 20 r r SET optimizer_switch=@save_optimizer_switch; DROP VIEW v1; DROP TABLE t1,t2,t3; # # LP bug #873263: materialized view used in correlated IN subquery # CREATE TABLE t1 (a int, b int) ; INSERT INTO t1 VALUES (5,4), (9,8); CREATE TABLE t2 (a int, b int) ; INSERT INTO t2 VALUES (4,5), (5,1); CREATE ALGORITHM=TEMPTABLE VIEW v2 AS SELECT * FROM t2; SET SESSION optimizer_switch='derived_with_keys=on'; EXPLAIN SELECT * FROM t1 WHERE t1.b IN (SELECT v2.a FROM v2 WHERE v2.b = t1.a); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where 1 PRIMARY <derived3> ref key0 key0 10 test.t1.b,test.t1.a 2 FirstMatch(t1) 3 DERIVED t2 ALL NULL NULL NULL NULL 2 SELECT * FROM t1 WHERE t1.b IN (SELECT v2.a FROM v2 WHERE v2.b = t1.a); a b 5 4 DROP VIEW v2; DROP TABLE t1,t2; # # LP bug #877316: query over a view with correlated subquery in WHERE # CREATE TABLE t1 (a int, b int, PRIMARY KEY (a)) ; INSERT INTO t1 VALUES (18,2), (19,9); CREATE TABLE t2 (a int, b int) ; INSERT INTO t2 VALUES (10,8), (5,10); CREATE VIEW v1 AS SELECT * FROM t1; SELECT t1.a FROM t1 WHERE EXISTS (SELECT t2.a FROM t2 WHERE t2.b < t1.b); a 19 EXPLAIN SELECT t1.a FROM t1 WHERE EXISTS (SELECT t2.a FROM t2 WHERE t2.b < t1.b); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where 2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where SELECT v1.a FROM v1 WHERE EXISTS (SELECT t2.a FROM t2 WHERE t2.b < v1.b); a 19 EXPLAIN SELECT v1.a FROM v1 WHERE EXISTS (SELECT t2.a FROM t2 WHERE t2.b < v1.b); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where 2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where DROP VIEW v1; DROP TABLE t1,t2; # # LP bug #878199: join of two materialized views # CREATE TABLE t1 (a int, b varchar(1)) ; INSERT INTO t1 VALUES (7,'c'), (3,'h'), (7,'c'); CREATE TABLE t2 (b varchar(1)) ; INSERT INTO t2 VALUES ('p'), ('c'), ('j'), ('c'), ('p'); CREATE VIEW v1 AS SELECT * FROM t1 GROUP BY a,b; CREATE VIEW v2 AS SELECT * FROM t2 GROUP BY b; SET SESSION optimizer_switch = 'derived_with_keys=on'; SELECT v1.a FROM v1,v2 WHERE v2.b = v1.b ORDER BY 1; a 7 EXPLAIN SELECT v1.a FROM v1,v2 WHERE v2.b = v1.b ORDER BY 1; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 3 Using where; Using filesort 1 PRIMARY <derived3> ref key0 key0 4 v1.b 2 3 DERIVED t2 ALL NULL NULL NULL NULL 5 Using temporary; Using filesort 2 DERIVED t1 ALL NULL NULL NULL NULL 3 Using temporary; Using filesort DROP VIEW v1,v2; DROP TABLE t1,t2; # # Bug #743378: join over merged view employing BNL # CREATE TABLE t1 ( d varchar(1) NOT NULL) ; INSERT INTO t1 VALUES ('j'),('v'),('c'); CREATE TABLE t2 (h time NOT NULL, d varchar(1) NOT NULL) ; INSERT INTO t2 VALUES ('05:03:03','w'),('02:59:24','d'),('00:01:58','e'); CREATE TABLE t3 ( b int NOT NULL, e varchar(1) NOT NULL, d varchar(1) NOT NULL, KEY (e,b) ); INSERT INTO t3 VALUES (4,'x','x'),(9,'w','w'),(4,'d','d'),(8,'e','e'); INSERT INTO t3 VALUES (14,'a','a'),(19,'b','b'),(14,'c','c'),(18,'d','d'); CREATE TABLE t4 (i int NOT NULL, m varchar(1) NOT NULL) ; INSERT INTO t4 VALUES (8,'m'),(9,'d'),(2,'s'),(4,'r'),(8,'m'); CREATE TABLE t5 ( a int NOT NULL, c int NOT NULL, b int NOT NULL, f date NOT NULL, g date NOT NULL, h time NOT NULL, j time NOT NULL, k datetime NOT NULL ); INSERT INTO t5 VALUES (1,4,0,'0000-00-00','0000-00-00','21:22:34','21:22:34','2002-02-13 17:30'), (2,6,8,'2004-09-18','2004-09-18','10:50:38','10:50:38','2008-09-27 00:34'); CREATE VIEW v3 AS SELECT t3.*, t4.i FROM t3, t4, t5; SET SESSION join_cache_level = 1; SET SESSION join_buffer_size = 512; EXPLAIN SELECT t2.d FROM t1,t2,v3 WHERE v3.e = t2.d AND v3.i < 3; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t5 ALL NULL NULL NULL NULL 2 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) 1 SIMPLE t3 ref e e 3 test.t2.d 1 Using index 1 SIMPLE t4 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join) SELECT t2.d FROM t1,t2,v3 WHERE v3.e = t2.d AND v3.i < 3; d w w w w w w d d d d d d d d d d d d e e e e e e SET SESSION join_cache_level = DEFAULT; SET SESSION join_buffer_size = DEFAULT; DROP VIEW v3; DROP TABLE t1,t2,t3,t4,t5; # # Bug #879882: right join within mergeable derived table # CREATE TABLE t1 (a varchar(1)); INSERT INTO t1 VALUES ('c'), ('a'); CREATE TABLE t2 (a int, b int, c varchar(1)); INSERT INTO t2 VALUES (29,8,'c'), (39,7,'b'); CREATE TABLE t3 (b int); SET @save_optimizer_switch=@@optimizer_switch; SET optimizer_switch='outer_join_with_cache=off'; EXPLAIN EXTENDED SELECT t.b, t.c, t1.a FROM t1, (SELECT t2.b, t2.c FROM t3 RIGHT JOIN t2 ON t2.a = t3.b) AS t WHERE t.b AND t.c = t1.a; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t3 system NULL NULL NULL NULL 0 0.00 Const row not found 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t2`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t1`.`a` AS `a` from `test`.`t1` join `test`.`t2` where `test`.`t2`.`c` = `test`.`t1`.`a` and `test`.`t2`.`b` <> 0 SELECT t.b, t.c, t1.a FROM t1, (SELECT t2.b, t2.c FROM t3 RIGHT JOIN t2 ON t2.a = t3.b) AS t WHERE t.b AND t.c = t1.a; b c a 8 c c EXPLAIN EXTENDED SELECT t.b, t.c, t1.a FROM t1, (SELECT t2.b, t2.c FROM t3 RIGHT JOIN t2 ON t2.a = t3.b) AS t WHERE t.b <> 0 AND t.c = t1.a; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t3 system NULL NULL NULL NULL 0 0.00 Const row not found 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t2`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t1`.`a` AS `a` from `test`.`t1` join `test`.`t2` where `test`.`t2`.`c` = `test`.`t1`.`a` and `test`.`t2`.`b` <> 0 SELECT t.b, t.c, t1.a FROM t1, (SELECT t2.b, t2.c FROM t3 RIGHT JOIN t2 ON t2.a = t3.b) AS t WHERE t.b <> 0 AND t.c = t1.a; b c a 8 c c INSERT INTO t3 VALUES (100), (200); EXPLAIN EXTENDED SELECT t.b, t.c, t1.a FROM t1, (SELECT t2.b, t2.c FROM t3 RIGHT JOIN t2 ON t2.a = t3.b) AS t WHERE t.b AND t.c = t1.a; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where Warnings: Note 1003 select `test`.`t2`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t1`.`a` AS `a` from `test`.`t1` join `test`.`t2` left join `test`.`t3` on(`test`.`t3`.`b` = `test`.`t2`.`a`) where `test`.`t2`.`c` = `test`.`t1`.`a` and `test`.`t2`.`b` <> 0 SELECT t.b, t.c, t1.a FROM t1, (SELECT t2.b, t2.c FROM t3 RIGHT JOIN t2 ON t2.a = t3.b) AS t WHERE t.b AND t.c = t1.a; b c a 8 c c EXPLAIN EXTENDED SELECT t.b, t.c, t1.a FROM t1, (SELECT t2.b, t2.c FROM t3 RIGHT JOIN t2 ON t2.a = t3.b) AS t WHERE t.b <> 0 AND t.c = t1.a; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where Warnings: Note 1003 select `test`.`t2`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t1`.`a` AS `a` from `test`.`t1` join `test`.`t2` left join `test`.`t3` on(`test`.`t3`.`b` = `test`.`t2`.`a`) where `test`.`t2`.`c` = `test`.`t1`.`a` and `test`.`t2`.`b` <> 0 SELECT t.b, t.c, t1.a FROM t1, (SELECT t2.b, t2.c FROM t3 RIGHT JOIN t2 ON t2.a = t3.b) AS t WHERE t.b <> 0 AND t.c = t1.a; b c a 8 c c SET optimizer_switch=@save_optimizer_switch; DROP TABLE t1,t2,t3; # # Bug #880724: materialized const view as inner table of outer join # CREATE TABLE t1 (a int, b varchar(1)); INSERT INTO t1 VALUES (9,NULL), (6,'r'), (7,'c'); CREATE TABLE t2 (a int); INSERT INTO t2 VALUES (6); CREATE ALGORITHM=TEMPTABLE VIEW v2 AS SELECT * FROM t2; SET @save_optimizer_switch=@@optimizer_switch; SET optimizer_switch='outer_join_with_cache=off'; SET SESSION optimizer_switch = 'derived_with_keys=on'; SET SESSION join_cache_level = 4; EXPLAIN SELECT t1.b,v2.a FROM t1 LEFT JOIN v2 ON v2.a = t1.a; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 1 Using where 2 DERIVED t2 system NULL NULL NULL NULL 1 SELECT t1.b,v2.a FROM t1 LEFT JOIN v2 ON v2.a = t1.a; b a NULL NULL r 6 c NULL CREATE TABLE t3 (a int, b varchar(1)); INSERT INTO t3 VALUES (8,'x'), (5,'r'), (9,'y'); EXPLAIN SELECT * FROM t3 WHERE t3.b <> ANY (SELECT t1.b FROM t1 LEFT JOIN v2 ON v2.a = t1.a); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 Using where 2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 Using where 2 DEPENDENT SUBQUERY <derived3> ALL NULL NULL NULL NULL 1 Using where 3 DERIVED t2 system NULL NULL NULL NULL 1 SELECT * FROM t3 WHERE t3.b <> ANY (SELECT t1.b FROM t1 LEFT JOIN v2 ON v2.a = t1.a); a b 8 x 5 r 9 y SET SESSION join_cache_level = default; SET optimizer_switch=@save_optimizer_switch; DROP VIEW v2; DROP TABLE t1,t2,t3; # # Bug #881449: OUTER JOIN usin a merged view within IN subquery # CREATE TABLE t1 (a varchar(1)) ; INSERT INTO t1 VALUES ('y'), ('x'); CREATE TABLE t2 (a int, PRIMARY KEY (a)) ; INSERT INTO t2 VALUES (1), (2); CREATE TABLE t3 (a int, b varchar(1)) ; INSERT INTO t3 VALUES (1,'x'); CREATE VIEW v3 AS SELECT * FROM t3; SET SESSION optimizer_switch='semijoin=on'; EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT v3.b FROM t2 RIGHT JOIN v3 ON v3.a = t2.a); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t3 system NULL NULL NULL NULL 1 1 PRIMARY t2 const PRIMARY PRIMARY 4 const 1 Using index 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where SELECT * FROM t1 WHERE a IN (SELECT v3.b FROM t2 RIGHT JOIN v3 ON v3.a = t2.a); a x set optimizer_switch= @save_optimizer_switch; DROP VIEW v3; DROP TABLE t1,t2,t3; # # Bug #874035: view as an inner table of a materialized derived # CREATE TABLE t2 (a int NOT NULL); INSERT INTO t2 VALUES (7), (4); CREATE TABLE t1 (b int NOT NULL); INSERT INTO t1 VALUES (5), (7); CREATE ALGORITHM=MERGE VIEW v1 AS SELECT * FROM t1; SET @save_optimizer_switch=@@optimizer_switch; SET SESSION optimizer_switch='derived_merge=off'; PREPARE st1 FROM 'SELECT * FROM (SELECT * FROM t2 LEFT JOIN v1 ON t2.a = v1.b) AS t'; EXECUTE st1; a b 7 7 4 NULL EXECUTE st1; a b 7 7 4 NULL DEALLOCATE PREPARE st1; set SESSION optimizer_switch= @save_optimizer_switch; DROP VIEW v1; DROP TABLE t1,t2; # # LP bug #879939: assertion in ha_maria::enable_indexes # with derived_with_keys=on # CREATE TABLE t2 (a varchar(3)); INSERT INTO t2 VALUES ('USA'), ('USA'), ('USA'), ('USA'), ('USA'); CREATE TABLE t1 (a varchar(3), b varchar(35)); INSERT INTO t1 VALUES ('USA','Lansing'), ('USA','Laredo'), ('USA','Las Vegas'), ('USA','Lexington-Fayett'), ('USA','Lincoln'), ('USA','Little Rock'), ('USA','Livonia'), ('USA','Long Beach'), ('USA','Los Angeles'), ('USA','Louisville'), ('USA','Lowell'), ('USA','Lubbock'), ('USA','Macon'), ('USA','Madison'), ('USA','Manchester'), ('USA','McAllen'), ('USA','Memphis'), ('USA','Mesa'), ('USA','Mesquite'), ('USA','Metairie'), ('USA','Miami'); CREATE TABLE t3 (a varchar(35)); INSERT INTO t3 VALUES ('Miami'); SET @save_optimizer_switch=@@optimizer_switch; SET optimizer_switch = 'derived_with_keys=on'; SET @@tmp_table_size=1024*4; explain SELECT * FROM (SELECT t1.* FROM t1, t2) AS t JOIN t3 ON t3.a = t.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 system NULL NULL NULL NULL 1 1 SIMPLE t2 ALL NULL NULL NULL NULL 5 1 SIMPLE t1 ALL NULL NULL NULL NULL 21 Using where; Using join buffer (flat, BNL join) SELECT * FROM (SELECT t1.* FROM t1, t2) AS t JOIN t3 ON t3.a = t.b; a b a USA Miami Miami USA Miami Miami USA Miami Miami USA Miami Miami USA Miami Miami SET @@tmp_table_size=1024*1024*16; SELECT * FROM (SELECT t1.* FROM t1, t2) AS t JOIN t3 ON t3.a = t.b; a b a USA Miami Miami USA Miami Miami USA Miami Miami USA Miami Miami USA Miami Miami SET @@tmp_table_size=default; set SESSION optimizer_switch= @save_optimizer_switch; drop table t1,t2,t3; # # BUG#882994: Crash in QUICK_RANGE_SELECT::reset with derived_with_keys # CREATE TABLE t2 ( pk varchar(33), col_varchar_key varchar(3) NOT NULL, col_varchar_nokey varchar(52) NOT NULL); INSERT INTO t2 VALUES ('NICSpanish','NIC','Spanish'), ('NERHausa','NER','Hausa'),('NGAJoruba','NGA','Joruba'), ('NIUNiue','NIU','Niue'),('NFKEnglish','NFK','English'), ('NORNorwegian','NOR','Norwegian'),('CIVAkan','CIV','Akan'), ('OMNArabic','OMN','Arabic'),('PAKPunjabi','PAK','Punjabi'), ('PLWPalau','PLW','Palau'),('PANSpanish','PAN','Spanish'), ('PNGPapuan Langua','PNG','Papuan Languages'), ('PRYSpanish','PRY','Spanish'), ('PERSpanish','PER','Spanish'), ('PCNPitcairnese','PCN','Pitcairnese'), ('MNPPhilippene La','MNP','Philippene Langu'),('PRTPortuguese','PRT','Portuguese'), ('PRISpanish','PRI','Spanish'),('POLPolish','POL','Polish'),('GNQFang','GNQ','Fang'); CREATE TABLE t1 ( col_varchar_nokey varchar(52) NOT NULL ) ; INSERT INTO t1 VALUES ('Chinese'),('English'),('French'),('German'), ('Italian'),('Japanese'),('Korean'),('Polish'),('Portuguese'),('Spanish'), ('Tagalog'),('Vietnamese'); CREATE TABLE t3 ( col_varchar_key varchar(52)) ; INSERT INTO t3 VALUES ('United States'); set @tmp_882994= @@max_heap_table_size; set max_heap_table_size=1; SELECT * FROM t3 JOIN ( SELECT t2.* FROM t1, t2 ) AS alias2 ON ( alias2.col_varchar_nokey = t3.col_varchar_key ) ORDER BY CONCAT(alias2.col_varchar_nokey); col_varchar_key pk col_varchar_key col_varchar_nokey set max_heap_table_size= @tmp_882994; drop table t1,t2,t3; # # LP bug #917990: Bad estimate of #rows for derived table with LIMIT # CREATE TABLE t1 (a int); INSERT INTO t1 VALUES (8), (3), (4), (7), (9), (5), (1), (2); SELECT * FROM (SELECT * FROM t1 LIMIT 3) t; a 8 3 4 EXPLAIN SELECT * FROM (SELECT * FROM t1 LIMIT 3) t; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 3 2 DERIVED t1 ALL NULL NULL NULL NULL 8 DROP TABLE t1; # # LP BUG#921878 incorrect check of items during columns union types # aggregation for merged derived tables # SET @save_optimizer_switch=@@optimizer_switch; SET SESSION optimizer_switch='derived_merge=on'; CREATE TABLE t1 ( a ENUM( 'x', 'y' ) ); insert into t1 values ('x'); CREATE TABLE t2 LIKE t1; insert into t1 values ('y'); CREATE TABLE t3 LIKE t1; INSERT INTO t3 SELECT * FROM ( SELECT * FROM t1 ) AS A UNION SELECT * FROM t2; select * from t3; a x y drop table t1,t2,t3; set SESSION optimizer_switch= @save_optimizer_switch; # # LP BUG#944782: derived table from an information schema table # SET @save_optimizer_switch=@@optimizer_switch; SET SESSION optimizer_switch='derived_merge=on'; SET SESSION optimizer_switch='derived_with_keys=on'; CREATE TABLE t1 (c1 int PRIMARY KEY, c2 char(5)); EXPLAIN SELECT COUNT(*) > 0 FROM INFORMATION_SCHEMA.COLUMNS INNER JOIN (SELECT TABLE_SCHEMA, GROUP_CONCAT(COLUMN_NAME ORDER BY SEQ_IN_INDEX ASC) AS COL_NAMES FROM INFORMATION_SCHEMA.STATISTICS GROUP BY TABLE_SCHEMA) AS UNIQUES ON ( COLUMNS.TABLE_SCHEMA = UNIQUES.TABLE_SCHEMA); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY COLUMNS ALL NULL NULL NULL NULL NULL Open_frm_only; Scanned all databases 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join) 2 DERIVED STATISTICS ALL NULL NULL NULL NULL NULL Open_frm_only; Scanned all databases; Using filesort SELECT COUNT(*) > 0 FROM INFORMATION_SCHEMA.COLUMNS INNER JOIN (SELECT TABLE_SCHEMA, GROUP_CONCAT(COLUMN_NAME ORDER BY SEQ_IN_INDEX ASC) AS COL_NAMES FROM INFORMATION_SCHEMA.STATISTICS GROUP BY TABLE_SCHEMA) AS UNIQUES ON ( COLUMNS.TABLE_SCHEMA = UNIQUES.TABLE_SCHEMA); COUNT(*) > 0 1 Warnings: Warning 1286 Unknown storage engine 'InnoDB' Warning 1286 Unknown storage engine 'InnoDB' Warning 1286 Unknown storage engine 'InnoDB' Warning 1286 Unknown storage engine 'InnoDB' Warning 1286 Unknown storage engine 'InnoDB' Warning 1286 Unknown storage engine 'InnoDB' DROP TABLE t1; SET SESSION optimizer_switch= @save_optimizer_switch; # # LP BUG#953649: crash when estimating the cost of a look-up # into a derived table to be materialized # CREATE TABLE t1 (a int); INSERT INTO t1 VALUES (132); CREATE TABLE t2 (b int, c varchar(256)); INSERT INTO t2 VALUES (132,'test1'), (120,'text2'), (132,'text3'); CREATE VIEW v AS SELECT b, GROUP_CONCAT(c) AS gc FROM t2 GROUP BY b; SET @save_optimizer_switch=@@optimizer_switch; SET SESSION optimizer_switch='derived_merge=off'; SET SESSION optimizer_switch='derived_with_keys=off'; EXPLAIN SELECT * FROM t1, v WHERE a = b; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 3 Using where 2 DERIVED t2 ALL NULL NULL NULL NULL 3 Using filesort SELECT * FROM t1, v WHERE a = b; a b gc 132 132 test1,text3 SET SESSION optimizer_switch='derived_merge=on'; SET SESSION optimizer_switch='derived_with_keys=on'; EXPLAIN SELECT * FROM t1, v WHERE a = b; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 1 PRIMARY <derived2> ref key0 key0 5 const 0 2 DERIVED t2 ALL NULL NULL NULL NULL 3 Using filesort SELECT * FROM t1, v WHERE a = b; a b gc 132 132 test1,text3 SET SESSION optimizer_switch= @save_optimizer_switch; DROP VIEW v; DROP TABLE t1,t2; # # LP BUG#968720 crash due to converting to materialized and # natural join made only once # SET @save968720_optimizer_switch=@@optimizer_switch; SET optimizer_switch = 'derived_merge=on'; CREATE TABLE t1 (a int, INDEX(a)); INSERT INTO t1 VALUES (1); CREATE TABLE t2 (a int, INDEX(a)); INSERT INTO t2 VALUES (1), (2); INSERT INTO t1 SELECT a FROM (SELECT a FROM test.t1) AS s1 NATURAL JOIN t2 AS s2; SELECT * FROM t1; a 1 1 DELETE FROM t1; INSERT INTO t1 VALUES (1); PREPARE stmt FROM " INSERT INTO t1 SELECT a FROM (SELECT a FROM test.t1) AS s1 NATURAL JOIN t2 AS s2; "; EXECUTE stmt; SELECT * FROM t1; a 1 1 EXECUTE stmt; SELECT * FROM t1; a 1 1 1 1 drop table t1,t2; set optimizer_switch=@save968720_optimizer_switch; # # LP BUG#978847 Server crashes in Item_ref::real_item on # INSERT .. SELECT with FROM subquery and derived_merge=ON SET @save978847_optimizer_switch=@@optimizer_switch; SET optimizer_switch = 'derived_merge=on'; CREATE TABLE t1 ( a INT, b INT ); INSERT INTO t1 VALUES (2,1),(3,2); select * from t1; a b 2 1 3 2 INSERT INTO t1 SELECT * FROM ( SELECT * FROM t1 ) AS alias; select * from t1; a b 2 1 3 2 2 1 3 2 prepare stmt1 from 'INSERT INTO t1 SELECT SQL_BIG_RESULT * FROM ( SELECT * FROM t1 ) AS alias'; execute stmt1; select * from t1; a b 2 1 3 2 2 1 3 2 2 1 3 2 2 1 3 2 execute stmt1; select * from t1; a b 2 1 3 2 2 1 3 2 2 1 3 2 2 1 3 2 2 1 3 2 2 1 3 2 2 1 3 2 2 1 3 2 drop table t1; set optimizer_switch=@save978847_optimizer_switch; # # LP bug998516 Server hangs on INSERT .. SELECT with derived_merge, # FROM subquery, UNION # CREATE TABLE t1 (a INT); INSERT INTO t1 VALUES (1),(2); CREATE TABLE t2 (b INT); INSERT INTO t2 VALUES (3),(4); INSERT INTO t1 SELECT * FROM ( SELECT * FROM t1 ) AS alias UNION SELECT * FROM t2; select * from t1; a 1 2 1 2 3 4 drop table t1,t2; # # MDEV-3873: Wrong result (extra rows) with NOT IN and # a subquery from a MERGE view # CREATE TABLE t1 (a INT NOT NULL) ENGINE=MyISAM; INSERT INTO t1 VALUES (4),(7),(0); CREATE TABLE t2 (b INT NOT NULL) ENGINE=MyISAM; INSERT INTO t2 VALUES (1),(2); CREATE TABLE t3 (c INT NOT NULL) ENGINE=MyISAM; INSERT INTO t3 VALUES (4),(6),(3); CREATE TABLE t4 (d INT NOT NULL) ENGINE=MyISAM; INSERT INTO t4 VALUES (4),(5),(3); CREATE TABLE tv (e INT NOT NULL) ENGINE=MyISAM; INSERT INTO tv VALUES (1),(3); CREATE ALGORITHM=TEMPTABLE VIEW v_temptable AS SELECT * FROM tv; CREATE ALGORITHM=MERGE VIEW v_merge AS SELECT * FROM tv; SELECT * FROM t1, t2 WHERE a NOT IN ( SELECT e FROM t3 LEFT JOIN v_temptable ON (c = e) WHERE c <> b ) AND a < b; a b SELECT * FROM t1, t2 WHERE a NOT IN ( SELECT e FROM t3 LEFT JOIN v_merge ON (c = e) WHERE c <> b ) AND a < b; a b SELECT * FROM t1, t2 WHERE a NOT IN ( SELECT e FROM t3 LEFT JOIN (SELECT * FROM tv) as derived ON (c = e) WHERE c <> b ) AND a < b; a b drop view v_temptable, v_merge; drop table t1,t2,t3,t4,tv; # # MDEV-3912: Wrong result (extra rows) with FROM subquery inside # ALL subquery, LEFT JOIN, derived_merge. # (duplicate of MDEV-3873 (above)) # SET @save3912_optimizer_switch=@@optimizer_switch; SET optimizer_switch = 'derived_merge=on,in_to_exists=on'; CREATE TABLE t1 (a INT) ENGINE=MyISAM; INSERT INTO t1 VALUES (4),(8); CREATE TABLE t2 (b INT) ENGINE=MyISAM; INSERT INTO t2 VALUES (7),(0); CREATE TABLE t3 (c INT, d INT NOT NULL) ENGINE=MyISAM; INSERT INTO t3 VALUES (0,4),(8,6); SELECT * FROM t1 WHERE a >= ALL ( SELECT d FROM t2 LEFT JOIN ( SELECT * FROM t3 ) AS alias ON ( c = b ) WHERE b >= a ); a 8 set optimizer_switch=@save3912_optimizer_switch; drop table t1, t2, t3; # # MDEV-4209: equi-join on BLOB column from materialized view # or derived table # set @save_optimizer_switch=@@optimizer_switch; set optimizer_switch='derived_with_keys=on'; CREATE TABLE t1 (c1 text, c2 int); INSERT INTO t1 VALUES ('a',1), ('c',3), ('g',7), ('d',4), ('c',3); CREATE TABLE t2 (c1 text, c2 int); INSERT INTO t2 VALUES ('b',2), ('c',3); CREATE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1; EXPLAIN EXTENDED SELECT v1.c1, v1.c2 FROM v1, t2 WHERE v1.c1=t2.c1 AND v1.c2=t2.c2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00 Using where 1 PRIMARY <derived2> ref key0 key0 5 test.t2.c2 2 100.00 Using where 2 DERIVED t1 ALL NULL NULL NULL NULL 5 100.00 Warnings: Note 1003 /* select#1 */ select `v1`.`c1` AS `c1`,`v1`.`c2` AS `c2` from `test`.`v1` join `test`.`t2` where `v1`.`c1` = `test`.`t2`.`c1` and `v1`.`c2` = `test`.`t2`.`c2` SELECT v1.c1, v1.c2 FROM v1, t2 WHERE v1.c1=t2.c1 AND v1.c2=t2.c2; c1 c2 c 3 c 3 EXPLAIN EXTENDED SELECT t2.c1, t2.c2 FROM (SELECT c1 g, MAX(c2) m FROM t1 GROUP BY c1) t, t2 WHERE t.g=t2.c1 AND t.m=t2.c2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00 Using where 1 PRIMARY <derived2> ref key0 key0 5 test.t2.c2 2 100.00 Using where 2 DERIVED t1 ALL NULL NULL NULL NULL 5 100.00 Using temporary; Using filesort Warnings: Note 1003 /* select#1 */ select `test`.`t2`.`c1` AS `c1`,`test`.`t2`.`c2` AS `c2` from (/* select#2 */ select `test`.`t1`.`c1` AS `g`,max(`test`.`t1`.`c2`) AS `m` from `test`.`t1` group by `test`.`t1`.`c1`) `t` join `test`.`t2` where `t`.`g` = `test`.`t2`.`c1` and `t`.`m` = `test`.`t2`.`c2` SELECT t2.c1, t2.c2 FROM (SELECT c1 g, MAX(c2) m FROM t1 GROUP BY c1) t, t2 WHERE t.g=t2.c1 AND t.m=t2.c2; c1 c2 c 3 EXPLAIN EXTENDED SELECT v1.c1, v1.c2, t2.c1, t2.c2 FROM v1, t2 WHERE v1.c1=t2.c1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 5 100.00 Using where; Using join buffer (flat, BNL join) 2 DERIVED t1 ALL NULL NULL NULL NULL 5 100.00 Warnings: Note 1003 /* select#1 */ select `v1`.`c1` AS `c1`,`v1`.`c2` AS `c2`,`test`.`t2`.`c1` AS `c1`,`test`.`t2`.`c2` AS `c2` from `test`.`v1` join `test`.`t2` where `v1`.`c1` = `test`.`t2`.`c1` SELECT v1.c1, v1.c2, t2.c1, t2.c2 FROM v1, t2 WHERE v1.c1=t2.c1; c1 c2 c1 c2 c 3 c 3 c 3 c 3 DROP VIEW v1; DROP TABLE t1,t2; set optimizer_switch=@save_optimizer_switch; # # mdev-5078: sum over a view/derived table # CREATE TABLE t1 (a int); INSERT INTO t1 (a) VALUES (1), (2); CREATE TABLE t2 (b int(11)); INSERT INTO t2 (b) VALUES (1), (2); CREATE VIEW v AS SELECT b as c FROM t2; SELECT a, (SELECT SUM(a + c) FROM v) FROM t1; a (SELECT SUM(a + c) FROM v) 1 5 2 7 SELECT a, (SELECT SUM(a + c) FROM (SELECT b as c FROM t2) AS v1) FROM t1; a (SELECT SUM(a + c) FROM (SELECT b as c FROM t2) AS v1) 1 5 2 7 DROP VIEW v; DROP TABLE t1,t2; # # mdev-5105: memory overwrite in multi-table update # using natural join with a view # create table t1(a int,b tinyint,c tinyint)engine=myisam; create table t2(a tinyint,b float,c int, d int, e int, f int, key (b), key(c), key(d), key(e), key(f))engine=myisam; create table t3(a int,b int,c int, d int, e int, f int, key(a), key(b), key(c), key(d), key(e), key(f))engine=myisam; create view v1 as select t2.b a, t1.b b, t2.c c, t2.d d, t2.e e, t2.f f from t1,t2 where t1.a=t2.a; update t3 natural join v1 set a:=1; drop view v1; drop table t1,t2,t3; # # mdev-5288: assertion failure for query over a view with ORDER BY # CREATE TABLE t1 (a int, b int) ENGINE=MyISAM; INSERT INTO t1 VALUES (4,1); CREATE ALGORITHM=MERGE VIEW v1 AS SELECT * FROM t1; EXPLAIN EXTENDED SELECT a FROM v1 WHERE a > 100 ORDER BY b; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables Warnings: Note 1003 select 4 AS `a` from dual where 0 order by 1 DROP VIEW v1; DROP TABLE t1; CREATE TABLE IF NOT EXISTS `galleries` ( `id` int(11) NOT NULL AUTO_INCREMENT, `name` varchar(100) NOT NULL, `year` int(11) DEFAULT NULL, PRIMARY KEY (`id`), UNIQUE KEY `name` (`name`) ) DEFAULT CHARSET=utf8; CREATE TABLE IF NOT EXISTS `pictures` ( `id` int(11) NOT NULL AUTO_INCREMENT, `name` varchar(100) NOT NULL, `width` float DEFAULT NULL, `height` float DEFAULT NULL, `year` int(4) DEFAULT NULL, `technique` varchar(50) DEFAULT NULL, `comment` varchar(2000) DEFAULT NULL, `gallery_id` int(11) NOT NULL, `type` int(11) NOT NULL, PRIMARY KEY (`id`), KEY `gallery_id` (`gallery_id`) ) DEFAULT CHARSET=utf8 ; ALTER TABLE `pictures` ADD CONSTRAINT `pictures_ibfk_1` FOREIGN KEY (`gallery_id`) REFERENCES `galleries` (`id`); INSERT INTO `galleries` (`id`, `name`, `year`) VALUES (1, 'Quand le noir et blanc invite le taupe', 2013), (2, 'Une touche de couleur', 2012), (3, 'Éclats', 2011), (4, 'Gris béton', 2010), (5, 'Expression du spalter', 2010), (6, 'Zénitude', 2009), (7, 'La force du rouge', 2008), (8, 'Sphères', NULL), (9, 'Centre', 2009), (10, 'Nébuleuse', NULL); INSERT INTO `pictures` (`id`, `name`, `width`, `height`, `year`, `technique`, `comment`, `gallery_id`, `type`) VALUES (1, 'Éclaircie', 72.5, 100, NULL, NULL, NULL, 1, 1), (2, 'Architecture', 81, 100, NULL, NULL, NULL, 1, 1), (3, 'Nouveau souffle', 72.5, 100, NULL, NULL, NULL, 1, 1), (4, 'Échanges (2)', 89, 116, NULL, NULL, NULL, 1, 1), (5, 'Échanges', 89, 116, NULL, NULL, NULL, 1, 1), (6, 'Fenêtre de vie', 81, 116, NULL, NULL, NULL, 1, 1), (7, 'Architecture', 81, 100, NULL, NULL, NULL, 1, 1), (8, 'Nouveau souffle (2)', 72.5, 100, NULL, NULL, NULL, 1, 1), (9, 'Fluidité', 89, 116, NULL, NULL, NULL, 1, 1), (10, 'Nouveau Monde', 89, 125, NULL, NULL, NULL, 1, 1), (11, 'Mirage', 73, 100, NULL, NULL, NULL, 1, 1), (12, 'Équilibre', 72.5, 116, NULL, NULL, NULL, 2, 1), (13, 'Fusion', 72.5, 116, NULL, NULL, NULL, 2, 1), (14, 'Étincelles', NULL, NULL, NULL, NULL, NULL, 3, 1), (15, 'Régénérescence', NULL, NULL, NULL, NULL, NULL, 3, 1), (16, 'Chaleur', 80, 80, NULL, NULL, NULL, 4, 1), (17, 'Création', 90, 90, NULL, NULL, NULL, 4, 1), (18, 'Horizon', 92, 73, NULL, NULL, NULL, 4, 1), (19, 'Labyrinthe', 81, 100, NULL, NULL, NULL, 4, 1), (20, 'Miroir', 80, 116, NULL, NULL, NULL, 5, 1), (21, 'Libération', 81, 116, NULL, NULL, NULL, 5, 1), (22, 'Éclats', 81, 116, NULL, NULL, NULL, 5, 1), (23, 'Zénitude', 116, 89, NULL, NULL, NULL, 6, 1), (24, 'Écritures lointaines', 90, 90, NULL, NULL, NULL, 7, 1), (25, 'Émergence', 80, 80, NULL, NULL, NULL, 7, 1), (26, 'Liberté', 50, 50, NULL, NULL, NULL, 7, 1), (27, 'Silhouettes amérindiennes', 701, 70, NULL, NULL, NULL, 7, 1), (28, 'Puissance', 81, 100, NULL, NULL, NULL, 8, 1), (29, 'Source', 73, 116, NULL, NULL, NULL, 8, 1), (30, 'Comme une ville qui prend vie', 50, 100, 2008, NULL, NULL, 9, 1), (31, 'Suspension azur', 80, 80, NULL, NULL, NULL, 9, 1), (32, 'Nébuleuse', 70, 70, NULL, NULL, NULL, 10, 1), (33, 'Œuvre commandée 120 P', 114, 195, NULL, NULL, NULL, 1, 2), (34, 'Œuvre commandée 120 P', 114, 195, NULL, NULL, NULL, 1, 2), (35, 'Œuvre commandée 120 P', 114, 195, NULL, NULL, NULL, 1, 2), (36, 'Œuvre commandée 120 P', 114, 195, NULL, NULL, NULL, 1, 2), (37, 'Œuvre commandée 120 P', 114, 195, NULL, NULL, NULL, 1, 2), (38, 'Œuvre commandée 120 P', 114, 195, NULL, NULL, NULL, 1, 2); explain SELECT g.id AS gallery_id, g.name AS gallery_name, p.id AS picture_id, p.name AS picture_name, g.p_random AS r1, g.p_random AS r2, g.p_random AS r3 FROM ( SELECT gal.id, gal.name, ( SELECT pi.id FROM pictures pi WHERE pi.gallery_id = gal.id ORDER BY RAND() LIMIT 1 ) AS p_random FROM galleries gal ) g LEFT JOIN pictures p ON p.id = g.p_random ORDER BY gallery_name ASC ; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 10 Using filesort 1 PRIMARY p eq_ref PRIMARY PRIMARY 4 g.p_random 1 Using where 2 DERIVED gal ALL NULL NULL NULL NULL 10 3 DEPENDENT SUBQUERY pi ref gallery_id gallery_id 4 test.gal.id 4 Using temporary; Using filesort drop table galleries, pictures; # # MDEV-5740: Assertion #`!derived->first_select()->exclude_from_table_unique_test || #derived->outer_select()-> exclude_from_table_unique_test' #failed on 2nd execution of PS with derived_merge # set @save_optimizer_switch5740=@@optimizer_switch; SET optimizer_switch = 'derived_merge=on'; CREATE TABLE t1 (a INT); INSERT INTO t1 VALUES (1),(2); CREATE TABLE t2 (b INT); INSERT INTO t2 VALUES (3),(4); PREPARE stmt FROM ' INSERT INTO t1 SELECT * FROM t2 UNION SELECT * FROM (SELECT * FROM t1) AS sq '; EXECUTE stmt; select * from t1; a 1 2 3 4 1 2 EXECUTE stmt; select * from t1; a 1 2 3 4 1 2 3 4 1 2 deallocate prepare stmt; drop table t1,t2; set optimizer_switch=@save_optimizer_switch5740; # # Bug mdev-5721: possible long key access to a materialized derived table # (see also the test case for Bug#13261277 that is actually the same bug) # CREATE TABLE t1 ( id varchar(255) NOT NULL DEFAULT '', familyid int(11) DEFAULT NULL, withdrawndate date DEFAULT NULL, KEY index_td_familyid_id (familyid,id) ) ENGINE=MyISAM DEFAULT CHARSET=utf8; CREATE TABLE t2 ( id int(11) NOT NULL AUTO_INCREMENT, activefromts datetime NOT NULL DEFAULT '0000-00-00 00:00:00', shortdescription text, useraccessfamily varchar(512) DEFAULT NULL, serialized longtext, PRIMARY KEY (id) ) ENGINE=MyISAM DEFAULT CHARSET=utf8; insert into t1 values ('picture/89/1369722032695.pmd',89,NULL); insert into t1 values ('picture/90/1369832057370.pmd',90,NULL); insert into t2 values (38,'2013-03-04 07:49:22','desc','CODE','string'); EXPLAIN SELECT * FROM t2 x, (SELECT t2.useraccessfamily, t2.serialized AS picturesubuser, COUNT(*) FROM t2, t1 GROUP BY t2.useraccessfamily, picturesubuser) y WHERE x.useraccessfamily = y.useraccessfamily; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY x system NULL NULL NULL NULL 1 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 Using where 2 DERIVED t2 system NULL NULL NULL NULL 1 2 DERIVED t1 index NULL index_td_familyid_id 772 NULL 2 Using index SELECT * FROM t2 x, (SELECT t2.useraccessfamily, t2.serialized AS picturesubuser, COUNT(*) FROM t2, t1 GROUP BY t2.useraccessfamily, picturesubuser) y WHERE x.useraccessfamily = y.useraccessfamily; id activefromts shortdescription useraccessfamily serialized useraccessfamily picturesubuser COUNT(*) 38 2013-03-04 07:49:22 desc CODE string CODE string 2 DROP TABLE t1,t2; # # Bug#13261277: Unchecked key length caused missing records. # CREATE TABLE t1 ( col_varchar varchar(1024) CHARACTER SET utf8 DEFAULT NULL, stub1 varchar(1024) CHARACTER SET utf8 DEFAULT NULL, stub2 varchar(1024) CHARACTER SET utf8 DEFAULT NULL, stub3 varchar(1024) CHARACTER SET utf8 DEFAULT NULL ); INSERT INTO t1 VALUES ('d','d','l','ther'), (NULL,'s','NJBIQ','trzetuchv'), (-715390976,'coul','MYWFB','cfhtrzetu'), (1696792576,'f','i\'s','c'), (1,'i','ltpemcfhtr','gsltpemcf'), (-663027712,'mgsltpemcf','sa','amgsltpem'), (-1686700032,'JPRVK','i','vamgsltpe'), (NULL,'STUNB','UNVJV','u'), (5,'oka','qyihvamgsl','AXSMD'), (NULL,'tqwmqyihva','h','yntqwmqyi'), (3,'EGMJN','e','e'); CREATE TABLE t2 ( col_varchar varchar(10) DEFAULT NULL, col_int INT DEFAULT NULL ); INSERT INTO t2 VALUES ('d',9); set optimizer_switch='derived_merge=off,derived_with_keys=on'; SET @save_heap_size= @@max_heap_table_size; SET @@max_heap_table_size= 16384; SELECT t2.col_int FROM t2 RIGHT JOIN ( SELECT * FROM t1 ) AS dt ON t2.col_varchar = dt.col_varchar WHERE t2.col_int IS NOT NULL ; col_int 9 # Shouldn't use auto_key0 for derived table EXPLAIN SELECT t2.col_int FROM t2 RIGHT JOIN ( SELECT * FROM t1 ) AS dt ON t2.col_varchar = dt.col_varchar WHERE t2.col_int IS NOT NULL ; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 system NULL NULL NULL NULL 1 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 11 Using where 2 DERIVED t1 ALL NULL NULL NULL NULL 11 SET @@max_heap_table_size= @save_heap_size; SET optimizer_switch=@save_optimizer_switch; DROP TABLE t1,t2; # # end of 5.3 tests # # # Bug mdev-11161: The second execution of prepared statement # does not use generated key for materialized # derived table / view # (actually this is a 5.3 bug.) # create table t1 ( mat_id MEDIUMINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY, matintnum CHAR(6) NOT NULL, test MEDIUMINT UNSIGNED NULL ); create table t2 ( mat_id MEDIUMINT UNSIGNED NOT NULL, pla_id MEDIUMINT UNSIGNED NOT NULL ); insert into t1 values (NULL, 'a', 1), (NULL, 'b', 2), (NULL, 'c', 3), (NULL, 'd', 4), (NULL, 'e', 5), (NULL, 'f', 6), (NULL, 'g', 7), (NULL, 'h', 8), (NULL, 'i', 9); insert into t2 values (1, 100), (1, 101), (1, 102), (2, 100), (2, 103), (2, 104), (3, 101), (3, 102), (3, 105); explain SELECT STRAIGHT_JOIN d.pla_id, m2.mat_id FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY m2 ALL NULL NULL NULL NULL 9 1 PRIMARY <derived2> ref key0 key0 7 test.m2.matintnum 2 2 DERIVED mp ALL NULL NULL NULL NULL 9 Using temporary; Using filesort 2 DERIVED m1 eq_ref PRIMARY PRIMARY 3 test.mp.mat_id 1 prepare stmt1 from "SELECT STRAIGHT_JOIN d.pla_id, m2.mat_id FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum"; flush status; execute stmt1; pla_id mat_id 102 1 101 1 100 1 104 2 103 2 105 3 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 21 Handler_read_last 0 Handler_read_next 6 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 6 Handler_read_rnd_deleted 0 Handler_read_rnd_next 27 flush status; execute stmt1; pla_id mat_id 102 1 101 1 100 1 104 2 103 2 105 3 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 21 Handler_read_last 0 Handler_read_next 6 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 6 Handler_read_rnd_deleted 0 Handler_read_rnd_next 27 deallocate prepare stmt1; drop table t1,t2; # # Bug mdev-12670: mergeable derived / view with subqueries # subject to semi-join optimizations # (actually this is a 5.3 bug.) # create table t1 (a int) engine=myisam; insert into t1 values (5),(3),(2),(7),(2),(5),(1); create table t2 (b int, index idx(b)) engine=myisam; insert into t2 values (2),(3),(2),(1),(3),(4); insert into t2 select b+10 from t2; insert into t2 select b+10 from t2; insert into t2 select b+10 from t2; insert into t2 select b+10 from t2; insert into t2 select b+10 from t2; insert into t2 select b+10 from t2; insert into t2 select b+10 from t2; insert into t2 select b+10 from t2; insert into t2 select b+10 from t2; insert into t2 select b+10 from t2; analyze table t1,t2; Table Op Msg_type Msg_text test.t1 analyze status OK test.t2 analyze status OK explain select a from t1 where a in (select b from t2); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 7 Using where 1 PRIMARY t2 ref idx idx 5 test.t1.a 140 Using index; FirstMatch(t1) explain select * from (select a from t1 where a in (select b from t2)) t; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 7 Using where 1 PRIMARY t2 ref idx idx 5 test.t1.a 140 Using index; FirstMatch(t1) create view v1 as select a from t1 where a in (select b from t2); explain select * from v1; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 7 Using where 1 PRIMARY t2 ref idx idx 5 test.t1.a 140 Using index; FirstMatch(t1) drop view v1; drop table t1,t2; # # Bug mdev-12812: mergeable derived / view with subqueries # NOT subject to semi-join optimizations # CREATE TABLE t1 (c1 varchar(3)) ENGINE=MyISAM; INSERT INTO t1 VALUES ('foo'),('foo'); CREATE TABLE t2 (c2 varchar(3)) ENGINE=MyISAM; INSERT INTO t2 VALUES ('bar'),('qux'),('foo'); SELECT STRAIGHT_JOIN * FROM ( SELECT * FROM t1 WHERE c1 IN ( SELECT c2 FROM t2 ) ) AS sq; c1 foo foo EXPLAIN EXTENDED SELECT STRAIGHT_JOIN * FROM ( SELECT * FROM t1 WHERE c1 IN ( SELECT c2 FROM t2 ) ) AS sq; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 Using where 3 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 3 100.00 Using where Warnings: Note 1003 /* select#1 */ select straight_join `test`.`t1`.`c1` AS `c1` from `test`.`t1` where <in_optimizer>(`test`.`t1`.`c1`,<exists>(/* select#3 */ select `test`.`t2`.`c2` from `test`.`t2` where <cache>(`test`.`t1`.`c1`) = `test`.`t2`.`c2`)) DROP TABLE t1, t2; # # Bug mdev-16420: materialized view that renames columns # in inner part of outer join # CREATE TABLE t1 (id int, PRIMARY KEY (id)); INSERT INTO t1 VALUES (2), (3), (7), (1); CREATE VIEW v1 AS SELECT * FROM t1; CREATE VIEW v2 AS SELECT v1.id AS order_pk FROM v1 GROUP BY v1.id; CREATE VIEW v3 AS SELECT t.id AS order_pk FROM (SELECT * FROM t1) AS t GROUP BY t.id; SELECT * FROM t1 LEFT JOIN v2 ON t1.id=v2.order_pk; id order_pk 1 1 2 2 3 3 7 7 EXPLAIN EXTENDED SELECT * FROM t1 LEFT JOIN v2 ON t1.id=v2.order_pk; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 index NULL PRIMARY 4 NULL 4 100.00 Using index 1 PRIMARY <derived2> ref key0 key0 5 test.t1.id 2 100.00 2 DERIVED t1 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index; Using filesort Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id`,`v2`.`order_pk` AS `order_pk` from `test`.`t1` left join `test`.`v2` on(`v2`.`order_pk` = `test`.`t1`.`id`) where 1 SELECT * FROM t1 LEFT JOIN v3 ON t1.id=v3.order_pk; id order_pk 1 1 2 2 3 3 7 7 EXPLAIN EXTENDED SELECT * FROM t1 LEFT JOIN v3 ON t1.id=v3.order_pk; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 index NULL PRIMARY 4 NULL 4 100.00 Using index 1 PRIMARY <derived2> ref key0 key0 5 test.t1.id 2 100.00 2 DERIVED t1 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index; Using filesort Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id`,`v3`.`order_pk` AS `order_pk` from `test`.`t1` left join `test`.`v3` on(`v3`.`order_pk` = `test`.`t1`.`id`) where 1 DROP VIEW v1,v2,v3; DROP TABLE t1; set optimizer_switch=@exit_optimizer_switch; set join_cache_level=@exit_join_cache_level;