EVOLUTION-MANAGER

Edit File: table_elim.result

drop table if exists t0, t1, t2, t3, t4, t5, t6; drop view if exists v1, v2; SET @save_optimizer_switch=@@optimizer_switch; SET optimizer_switch='outer_join_with_cache=off'; create table t1 (a int); insert into t1 values (0),(1),(2),(3); create table t0 as select * from t1; create table t2 (a int primary key, b int) as select a, a as b from t1 where a in (1,2); create table t3 (a int primary key, b int) as select a, a as b from t1 where a in (1,3); # This will be eliminated: explain select t1.a from t1 left join t2 on t2.a=t1.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 explain extended select t1.a from t1 left join t2 on t2.a=t1.a; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 100.00 Warnings: Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where 1 select t1.a from t1 left join t2 on t2.a=t1.a; a 0 1 2 3 # This will not be eliminated as t2.b is in in select list: explain select * from t1 left join t2 on t2.a=t1.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where # This will not be eliminated as t2.b is in in order list: explain select t1.a from t1 left join t2 on t2.a=t1.a order by t2.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using temporary; Using filesort 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where # This will not be eliminated as t2.b is in group list: explain select t1.a from t1 left join t2 on t2.a=t1.a group by t2.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using temporary; Using filesort 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where # This will not be eliminated as t2.b is in the WHERE explain select t1.a from t1 left join t2 on t2.a=t1.a where t2.b < 3 or t2.b is null; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where # Elimination of multiple tables: explain select t1.a from t1 left join (t2 join t3) on t2.a=t1.a and t3.a=t1.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 # Elimination of multiple tables (2): explain select t1.a from t1 left join (t2 join t3 on t2.b=t3.b) on t2.a=t1.a and t3.a=t1.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 # Elimination when done within an outer join nest: explain extended select t0.* from t0 left join (t1 left join (t2 join t3 on t2.b=t3.b) on t2.a=t1.a and t3.a=t1.a) on t0.a=t1.a; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 4 100.00 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 100.00 Using where Warnings: Note 1003 select `test`.`t0`.`a` AS `a` from `test`.`t0` left join (`test`.`t1`) on(`test`.`t1`.`a` = `test`.`t0`.`a`) where 1 # Elimination with aggregate functions explain select count(*) from t1 left join t2 on t2.a=t1.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 explain select count(1) from t1 left join t2 on t2.a=t1.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 explain select count(1) from t1 left join t2 on t2.a=t1.a group by t1.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using temporary; Using filesort This must not use elimination: explain select count(1) from t1 left join t2 on t2.a=t1.a group by t2.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using temporary; Using filesort 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using index drop table t0, t1, t2, t3; create table t0 ( id integer, primary key (id)); create table t1 ( id integer, attr1 integer, primary key (id), key (attr1) ); create table t2 ( id integer, attr2 integer, fromdate date, primary key (id, fromdate), key (attr2,fromdate) ); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); insert into t0 select A.id + 10*B.id from t0 A, t0 B where B.id > 0; insert into t1 select id, id from t0; insert into t2 select id, id, date_add('2009-06-22', interval id day) from t0; insert into t2 select id, id+1, date_add('2008-06-22', interval id day) from t0; create view v1 as select f.id, a1.attr1, a2.attr2 from t0 f left join t1 a1 on a1.id=f.id left join t2 a2 on a2.id=f.id and a2.fromdate=(select MAX(fromdate) from t2 where id=a2.id); create view v2 as select f.id, a1.attr1, a2.attr2 from t0 f left join t1 a1 on a1.id=f.id left join t2 a2 on a2.id=f.id and a2.fromdate=(select MAX(fromdate) from t2 where id=f.id); This should use one table: explain select id from v1 where id=2; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY f const PRIMARY PRIMARY 4 const 1 Using index This should use one table: explain extended select id from v1 where id in (1,2,3,4); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY f range PRIMARY PRIMARY 4 NULL 4 100.00 Using where; Using index Warnings: Note 1276 Field or reference 'test.a2.id' of SELECT #3 was resolved in SELECT #2 Note 1003 /* select#1 */ select `f`.`id` AS `id` from `test`.`t0` `f` where `f`.`id` in (1,2,3,4) This should use facts and a1 tables: explain extended select id from v1 where attr1 between 12 and 14; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY a1 range PRIMARY,attr1 attr1 5 NULL 2 100.00 Using index condition 1 PRIMARY f eq_ref PRIMARY PRIMARY 4 test.a1.id 1 100.00 Using index Warnings: Note 1276 Field or reference 'test.a2.id' of SELECT #3 was resolved in SELECT #2 Note 1003 /* select#1 */ select `f`.`id` AS `id` from `test`.`t0` `f` join `test`.`t1` `a1` where `f`.`id` = `a1`.`id` and `a1`.`attr1` between 12 and 14 This should use facts, a2 and its subquery: explain extended select id from v1 where attr2 between 12 and 14; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY a2 range PRIMARY,attr2 attr2 5 NULL 5 100.00 Using index condition; Using where 1 PRIMARY f eq_ref PRIMARY PRIMARY 4 test.a2.id 1 100.00 Using index 3 DEPENDENT SUBQUERY t2 ref PRIMARY PRIMARY 4 test.a2.id 2 100.00 Using index Warnings: Note 1276 Field or reference 'test.a2.id' of SELECT #3 was resolved in SELECT #2 Note 1003 /* select#1 */ select `f`.`id` AS `id` from `test`.`t0` `f` join `test`.`t2` `a2` where `f`.`id` = `a2`.`id` and `a2`.`attr2` between 12 and 14 and `a2`.`fromdate` = <expr_cache><`a2`.`id`>((/* select#3 */ select max(`test`.`t2`.`fromdate`) from `test`.`t2` where `test`.`t2`.`id` = `a2`.`id`)) This should use one table: explain select id from v2 where id=2; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY f const PRIMARY PRIMARY 4 const 1 Using index This should use one table: explain extended select id from v2 where id in (1,2,3,4); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY f range PRIMARY PRIMARY 4 NULL 4 100.00 Using where; Using index Warnings: Note 1276 Field or reference 'test.f.id' of SELECT #3 was resolved in SELECT #2 Note 1003 /* select#1 */ select `f`.`id` AS `id` from `test`.`t0` `f` where `f`.`id` in (1,2,3,4) This should use facts and a1 tables: explain extended select id from v2 where attr1 between 12 and 14; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY a1 range PRIMARY,attr1 attr1 5 NULL 2 100.00 Using index condition 1 PRIMARY f eq_ref PRIMARY PRIMARY 4 test.a1.id 1 100.00 Using index Warnings: Note 1276 Field or reference 'test.f.id' of SELECT #3 was resolved in SELECT #2 Note 1003 /* select#1 */ select `f`.`id` AS `id` from `test`.`t0` `f` join `test`.`t1` `a1` where `f`.`id` = `a1`.`id` and `a1`.`attr1` between 12 and 14 This should use facts, a2 and its subquery: explain extended select id from v2 where attr2 between 12 and 14; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY a2 range PRIMARY,attr2 attr2 5 NULL 5 100.00 Using index condition 1 PRIMARY f eq_ref PRIMARY PRIMARY 4 test.a2.id 1 100.00 Using where; Using index 3 DEPENDENT SUBQUERY t2 ref PRIMARY PRIMARY 4 test.f.id 2 100.00 Using index Warnings: Note 1276 Field or reference 'test.f.id' of SELECT #3 was resolved in SELECT #2 Note 1003 /* select#1 */ select `f`.`id` AS `id` from `test`.`t0` `f` join `test`.`t2` `a2` where `f`.`id` = `a2`.`id` and `a2`.`attr2` between 12 and 14 and `a2`.`fromdate` = <expr_cache><`f`.`id`>((/* select#3 */ select max(`test`.`t2`.`fromdate`) from `test`.`t2` where `test`.`t2`.`id` = `f`.`id`)) drop view v1, v2; drop table t0, t1, t2; create table t1 (a int); insert into t1 values (0),(1),(2),(3); create table t2 (pk1 int, pk2 int, pk3 int, col int, primary key(pk1, pk2, pk3)); insert into t2 select a,a,a,a from t1; This must use only t1: explain select t1.* from t1 left join t2 on t2.pk1=t1.a and t2.pk2=t2.pk1+1 and t2.pk3=t2.pk2+1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 This must use only t1: explain select t1.* from t1 left join t2 on t2.pk1=t1.a and t2.pk3=t2.pk1+1 and t2.pk2=t2.pk3+1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 This must use both: explain select t1.* from t1 left join t2 on t2.pk1=t1.a and t2.pk3=t2.pk1+1 and t2.pk2=t2.pk3+t2.col; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 1 SIMPLE t2 ref PRIMARY PRIMARY 4 test.t1.a 1 Using where This must use only t1: explain select t1.* from t1 left join t2 on t2.pk2=t1.a and t2.pk1=t2.pk2+1 and t2.pk3=t2.pk1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 drop table t1, t2; create table t1 (pk int primary key, col int); insert into t1 values (1,1),(2,2); create table t2 like t1; insert into t2 select * from t1; create table t3 like t1; insert into t3 select * from t1; explain select t1.* from t1 left join ( t2 left join t3 on t3.pk=t2.col) on t2.col=t1.col; 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 2 Using where explain select t1.*, t2.* from t1 left join (t2 left join t3 on t3.pk=t2.col) on t2.pk=t1.col; 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 eq_ref PRIMARY PRIMARY 4 test.t1.col 1 Using where explain select t1.* from t1 left join ( t2 left join t3 on t3.pk=t2.col or t3.pk=t2.col) on t2.col=t1.col or t2.col=t1.col; 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 2 Using where explain select t1.*, t2.* from t1 left join (t2 left join t3 on t3.pk=t2.col or t3.pk=t2.col) on t2.pk=t1.col or t2.pk=t1.col; 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 eq_ref PRIMARY PRIMARY 4 test.t1.col 1 Using where drop table t1, t2, t3; # # Check things that look like functional dependencies but really are not # create table t1 (a char(10) character set latin1 collate latin1_general_ci primary key); insert into t1 values ('foo'); insert into t1 values ('bar'); create table t2 (a char(10) character set latin1 collate latin1_general_cs primary key); insert into t2 values ('foo'); insert into t2 values ('FOO'); this must not use table elimination: explain select t1.* from t1 left join t2 on t2.a='foo' collate latin1_general_ci; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index NULL PRIMARY 10 NULL 2 Using index 1 SIMPLE t2 index PRIMARY PRIMARY 10 NULL 2 Using where; Using index this must not use table elimination: explain select t1.* from t1 left join t2 on t2.a=t1.a collate latin1_general_ci; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index NULL PRIMARY 10 NULL 2 Using index 1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 2 Range checked for each record (index map: 0x1) drop table t1,t2; create table t1 (a int primary key); insert into t1 values (1),(2); create table t2 (a char(10) primary key); insert into t2 values ('1'),('1.0'); this must not use table elimination: explain select t1.* from t1 left join t2 on t2.a=1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index NULL PRIMARY 4 NULL 2 Using index 1 SIMPLE t2 index PRIMARY PRIMARY 10 NULL 2 Using where; Using index this must not use table elimination: explain select t1.* from t1 left join t2 on t2.a=t1.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index NULL PRIMARY 4 NULL 2 Using index 1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 2 Range checked for each record (index map: 0x1) drop table t1, t2; create table t1 (a char(10) primary key); insert into t1 values ('foo'),('bar'); create table t2 (a char(10), unique key(a(2))); insert into t2 values ('foo'),('bar'),('boo'),('car'),('coo'),('par'),('doo'),('tar'); explain select t1.* from t1 left join t2 on t2.a=t1.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index NULL PRIMARY 10 NULL 2 Using index 1 SIMPLE t2 ref a a 3 test.t1.a 2 Using where drop table t1, t2; # # check UPDATE/DELETE that look like they could be eliminated # create table t1 (a int primary key, b int); insert into t1 values (1,1),(2,2),(3,3); create table t2 like t1; insert into t2 select * from t1; update t1 left join t2 using (a) set t2.a=t2.a+100; select * from t1; a b 1 1 2 2 3 3 select * from t2; a b 101 1 102 2 103 3 delete from t2; insert into t2 select * from t1; delete t2 from t1 left join t2 using (a); select * from t1; a b 1 1 2 2 3 3 select * from t2; a b drop table t1, t2; # # Tests with various edge-case ON expressions # create table t1 (a int, b int, c int, d int); insert into t1 values (0,0,0,0),(1,1,1,1),(2,2,2,2),(3,3,3,3); create table t2 (pk int primary key, b int) as select a as pk, a as b from t1 where a in (1,2); create table t3 (pk1 int, pk2 int, b int, unique(pk1,pk2)); insert into t3 select a as pk1, a as pk2, a as b from t1 where a in (1,3); explain select t1.a from t1 left join t2 on t2.pk=t1.a and t2.b<t1.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 explain select t1.a from t1 left join t2 on t2.pk=t1.a or t2.b<t1.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 2 Using where explain select t1.a from t1 left join t2 on t2.b<t1.b or t2.pk=t1.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 2 Using where explain select t1.a from t1 left join t2 on t2.pk between 10 and 20; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 1 SIMPLE t2 index PRIMARY PRIMARY 4 NULL 2 Using where; Using index explain select t1.a from t1 left join t2 on t2.pk between 0.5 and 1.5; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 1 SIMPLE t2 index PRIMARY PRIMARY 4 NULL 2 Using where; Using index explain select t1.a from t1 left join t2 on t2.pk between 10 and 10; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 explain select t1.a from t1 left join t2 on t2.pk in (10); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 explain select t1.a from t1 left join t2 on t2.pk in (t1.a); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 explain select t1.a from t1 left join t2 on TRUE; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 1 SIMPLE t2 index NULL PRIMARY 4 NULL 2 Using where; Using index explain select t1.a from t1 left join t3 on t3.pk1=t1.a and t3.pk2 IS NULL; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 drop table t1,t2,t3; # # Multi-equality tests # create table t1 (a int, b int, c int, d int); insert into t1 values (0,0,0,0),(1,1,1,1),(2,2,2,2),(3,3,3,3); create table t2 (pk int primary key, b int, c int); insert into t2 select a,a,a from t1 where a in (1,2); explain select t1.* from t1 left join t2 on t2.pk=t2.c and t2.b=t1.a and t1.a=t1.b and t2.c=t2.b where t1.d=1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using where explain select t1.* from t1 left join t2 on (t2.pk=t2.c and t2.b=t1.a and t1.a=t1.b and t2.c=t2.b) or (t2.pk=t2.c and t2.b=t1.a and t1.a=t1.b and t2.c=t2.b) where t1.d=1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using where #This can't be eliminated: explain select t1.* from t1 left join t2 on (t2.pk=t2.c and t2.b=t1.a and t2.c=t1.b) or (t2.pk=t2.c and t1.a=t1.b and t2.c=t1.b) where t1.d=1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using where 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 Using where explain select t1.* from t1 left join t2 on (t2.pk=t2.c and t2.b=t1.a and t2.c=t1.b) or (t2.pk=t2.c and t2.c=t1.b) ; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 explain select t1.* from t1 left join t2 on t2.pk=3 or t2.pk= 4; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 1 SIMPLE t2 index PRIMARY PRIMARY 4 NULL 2 Using where; Using index explain select t1.* from t1 left join t2 on t2.pk=3 or t2.pk= 3; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 explain select t1.* from t1 left join t2 on (t2.pk=3 and t2.b=3) or (t2.pk= 4 and t2.b=3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 2 Using where drop table t1, t2; # # LPBUG#523593: Running RQG optimizer_no_subquery crashes MariaDB # CREATE TABLE t1 ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_int_nokey` int(11) DEFAULT NULL, `col_int_key` int(11) DEFAULT NULL, `col_date_key` date DEFAULT NULL, `col_date_nokey` date DEFAULT NULL, `col_time_key` time DEFAULT NULL, `col_time_nokey` time DEFAULT NULL, `col_datetime_key` datetime DEFAULT NULL, `col_datetime_nokey` datetime DEFAULT NULL, `col_varchar_key` varchar(1) DEFAULT NULL, `col_varchar_nokey` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`), KEY `col_int_key` (`col_int_key`), KEY `col_date_key` (`col_date_key`), KEY `col_time_key` (`col_time_key`), KEY `col_datetime_key` (`col_datetime_key`), KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) ); CREATE TABLE t2 LIKE t1; INSERT INTO t1 VALUES (10,7,8,NULL,NULL,'01:27:35','01:27:35','2002-02-26 06:14:37','2002-02-26 06:14:37','v','v'), (11,1,9,'2006-06-14','2006-06-14','19:48:31','19:48:31','1900-01-01 00:00:00','1900-01-01 00:00:00','r','r'); INSERT INTO t2 SELECT * FROM t1; SELECT table2.col_int_key AS field1 FROM ( t2 AS table1 RIGHT OUTER JOIN ( ( t1 AS table2 STRAIGHT_JOIN t1 AS table3 ON ( (table3.col_varchar_nokey = table2.col_varchar_key ) AND (table3.pk = table2.col_int_key)) ) ) ON ( (table3.col_varchar_key = table2.col_varchar_key) OR (table3.col_int_key = table2.pk) ) ) HAVING field1 < 216; field1 DROP TABLE t1, t2; # # LPBUG#524025 Running RQG outer_join test leads to crash # CREATE TABLE t0 ( pk int(11) NOT NULL AUTO_INCREMENT, PRIMARY KEY (pk) ); CREATE TABLE t1 ( col_int int(11) DEFAULT NULL, col_int_key int(11) DEFAULT NULL, pk int(11) NOT NULL AUTO_INCREMENT, col_varchar_10_latin1 varchar(10) DEFAULT NULL, PRIMARY KEY (pk) ); INSERT INTO t1 VALUES (5,5,1,'t'), (NULL,NULL,2,'y'); CREATE TABLE t2 ( col_int int(11) DEFAULT NULL ); INSERT INTO t2 VALUES (8), (4); CREATE TABLE t3 ( pk int(11) NOT NULL AUTO_INCREMENT, PRIMARY KEY (pk) ); INSERT INTO t3 VALUES (1),(8); CREATE TABLE t4 ( pk int(11) NOT NULL AUTO_INCREMENT, col_varchar_1024_latin1_key varchar(1024) DEFAULT NULL, col_int int(11) DEFAULT NULL, PRIMARY KEY (pk) ); INSERT INTO t4 VALUES (1,'o',1), (2,'w',2); CREATE TABLE t5 ( col_varchar_1024_utf8_key varchar(1024) CHARACTER SET utf8 DEFAULT NULL, col_varchar_1024_latin1_key varchar(1024) DEFAULT NULL, col_varchar_10_utf8_key varchar(1024) CHARACTER SET utf8 DEFAULT NULL, pk int(11) NOT NULL AUTO_INCREMENT, col_int_key int(11) DEFAULT NULL, PRIMARY KEY (pk) ); INSERT INTO t5 VALUES ('k','a','z',1,2),('x','a','w',2,7); CREATE TABLE t6 ( col_int int(11) DEFAULT NULL, col_int_key int(11) DEFAULT NULL ); INSERT INTO t6 VALUES (6,1),(8,3); SELECT table3.col_int AS field1, table1.col_int AS field2, table1.col_int_key AS field3, table1.pk AS field4, table1.col_int AS field5, table2.col_int AS field6 FROM t1 AS table1 LEFT OUTER JOIN t4 AS table2 LEFT JOIN t6 AS table3 RIGHT JOIN t3 AS table4 LEFT JOIN t5 AS table5 ON table4.pk = table5.pk LEFT JOIN t0 AS table6 ON table5.col_int_key = table6.pk ON table3.col_int_key = table5.pk ON table2.col_varchar_1024_latin1_key = table5.col_varchar_10_utf8_key LEFT JOIN t6 AS table7 ON table2.pk = table7.col_int ON table1.col_varchar_10_latin1 = table5.col_varchar_1024_latin1_key LEFT JOIN t2 AS table8 ON table3.col_int = table8.col_int WHERE table1.col_int_key < table2.pk HAVING field4 != 6; field1 field2 field3 field4 field5 field6 drop table t0,t1,t2,t3,t4,t5,t6; # # BUG#675118: Elimination of a table results in an invalid execution plan # CREATE TABLE t1 (f1 int(11), PRIMARY KEY (f1)) ; CREATE TABLE t2 (f4 varchar(1024), KEY (f4)) ; Warnings: Warning 1071 Specified key was too long; max key length is 1000 bytes INSERT IGNORE INTO t2 VALUES ('xcddwntkbxyorzdv'), ('cnxxcddwntkbxyor'),('r'),('r'), ('did'),('I'),('when'), ('hczkfqjeggivdvac'),('e'),('okay'),('up'); CREATE TABLE t3 (f4 varchar(1024), f1 int(11), f2 int(11)) ; INSERT IGNORE INTO t3 VALUES ('f','4','0'),('n','5','-996540416'); CREATE TABLE t4 (f1 int(11), f3 varchar(10)) ; INSERT IGNORE INTO t4 VALUES ('8','n'),('9','nwzcerzsgx'),('10','c'); CREATE TABLE t5 (f5 int(11), KEY (f5)) ; EXPLAIN SELECT t3.f2 FROM t2 LEFT JOIN t3 LEFT JOIN t4 LEFT JOIN t1 ON t4.f1 = t1.f1 JOIN t5 ON t4.f3 ON t3.f1 = t5.f5 ON t2.f4 = t3.f4 WHERE t3.f2 ; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t5 ref f5 f5 5 test.t3.f1 2 Using where; Using index 1 SIMPLE t4 ALL NULL NULL NULL NULL 3 Using where 1 SIMPLE t2 ALL f4 NULL NULL NULL 11 Using where; Using join buffer (flat, BNL join) # ^^ The above must not produce a QEP of t3,t5,t2,t4 # as that violates the "no interleaving of outer join nests" rule. DROP TABLE t1,t2,t3,t4,t5; # # BUG#997747: Assertion `join->best_read < ((double)1.79..5e+308L)' # failed in greedy_search with LEFT JOINs and unique keys # CREATE TABLE t1 (a1 INT); CREATE TABLE t2 (b1 INT); CREATE TABLE t3 (c1 INT, UNIQUE KEY(c1)); CREATE TABLE t4 (d1 INT, UNIQUE KEY(d1)); CREATE TABLE t5 (e1 INT); INSERT INTO t1 VALUES (1),(2); INSERT INTO t2 VALUES (2),(3); INSERT INTO t3 VALUES (3),(4); INSERT INTO t4 VALUES (4),(5); INSERT INTO t5 VALUES (5),(6); SELECT a1 FROM t1 LEFT JOIN t2 LEFT JOIN t3 LEFT JOIN t4 ON c1 = d1 ON d1 = b1 ON a1 = b1 LEFT JOIN t5 ON a1 = e1 ; a1 1 2 DROP TABLE t1,t2,t3,t4,t5; # # BUG#884184: Wrong result with RIGHT JOIN + derived_merge # CREATE TABLE t1 (a int(11), b varchar(1)) ; INSERT IGNORE INTO t1 VALUES (0,'g'); CREATE TABLE t3 ( a varchar(1)) ; INSERT IGNORE INTO t3 VALUES ('g'); CREATE TABLE t2 ( a int(11) NOT NULL, PRIMARY KEY (a)); INSERT INTO t2 VALUES (9), (10); create view v1 as SELECT t1.* FROM t1 LEFT JOIN t2 ON ( t1.a = t2.a ) WHERE t2.a <> 0; SELECT alias1.* FROM t3 LEFT JOIN v1 as alias1 ON ( t3.a = alias1.b ); a b NULL NULL EXPLAIN SELECT alias1.* FROM t3 LEFT JOIN v1 as alias1 ON ( t3.a = alias1.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 t1 ALL NULL NULL NULL NULL 1 Using where 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index drop view v1; DROP TABLE t1,t2,t3; # # MDEV-5344: LEFT OUTER JOIN table data is lost in ON DUPLICATE KEY UPDATE section # create table t1 ( id int(10) unsigned NOT NULL DEFAULT '0', v int(10) unsigned DEFAULT '0', PRIMARY KEY (id) ); create table t2 ( id int(10) unsigned NOT NULL DEFAULT '0', PRIMARY KEY (id) ) ; create table t3 ( id int(10) unsigned NOT NULL DEFAULT '0', v int(10) unsigned DEFAULT '0', PRIMARY KEY (id) ); insert into t1 values (1, 10), (2, 10); insert into t2 values (1), (2); insert into t3 values (1, 20); insert into t1 select t2.id, 5 from t2 LEFT OUTER JOIN t3 ON t2.id = t3.id on duplicate key update t1.v = t3.v; select * from t1; id v 1 20 2 NULL drop table t1,t2,t3; # # BUG#919878: Assertion `!eliminated_tables... # CREATE TABLE t1 ( a INT ); INSERT INTO t1 VALUES (1); CREATE TABLE t2 ( b INT, UNIQUE INDEX(b) ); INSERT INTO t2 VALUES (1),(2); EXPLAIN EXTENDED SELECT * FROM t2 WHERE b IN ( SELECT SUM(a) FROM t1 LEFT JOIN t2 ON b=a ); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index NULL b 5 NULL 2 100.00 Using where; Using index 2 DEPENDENT SUBQUERY t1 system NULL NULL NULL NULL 1 100.00 Warnings: Note 1003 /* select#1 */ select `test`.`t2`.`b` AS `b` from `test`.`t2` where <expr_cache><`test`.`t2`.`b`>(<in_optimizer>(`test`.`t2`.`b`,<exists>(/* select#2 */ select sum(1) from dual where 1 having <cache>(`test`.`t2`.`b`) = <ref_null_helper>(sum(1))))) DROP TABLE t1,t2; # # MDEV-4840: Wrong result (missing rows) on LEFT JOIN with InnoDB tables # CREATE TABLE t1 (alpha3 VARCHAR(3)); INSERT INTO t1 VALUES ('USA'),('CAN'); CREATE TABLE t2 ( t3_code VARCHAR(3), name VARCHAR(64)); INSERT INTO t2 VALUES ('USA','Austin'),('USA','Boston'); CREATE TABLE t3 ( code VARCHAR(3), name VARCHAR(64), PRIMARY KEY (code), UNIQUE KEY (name)); INSERT INTO t3 VALUES ('CAN','Canada'),('USA','United States'); SELECT * FROM t1 LEFT JOIN ( t2 LEFT JOIN t3 ON t2.t3_code = t3.code ) ON t1.alpha3 = t3.code; alpha3 t3_code name code name USA USA Austin USA United States USA USA Boston USA United States CAN NULL NULL NULL NULL SELECT t1.alpha3 FROM t1 LEFT JOIN ( t2 LEFT JOIN t3 ON t2.t3_code = t3.code ) ON t1.alpha3 = t3.code; alpha3 USA USA CAN DROP TABLE t1, t2, t3; SET optimizer_switch=@save_optimizer_switch; # # MDEV-7893: table_elimination works wrong with on computed expression and compound unique key # (just a testcase) CREATE TABLE t1 ( PostID int(10) unsigned NOT NULL ) DEFAULT CHARSET=utf8; INSERT INTO t1 (PostID) VALUES (1), (2); CREATE TABLE t2 ( VoteID int(10) unsigned NOT NULL PRIMARY KEY AUTO_INCREMENT, EntityID int(10) unsigned NOT NULL, UserID int(10) unsigned NOT NULL, UNIQUE KEY EntityID (EntityID,UserID) ) DEFAULT CHARSET=utf8; INSERT INTO t2 (EntityID, UserID) VALUES (1, 30), (2, 30); SELECT t1.*, T.Voted as Voted FROM t1 LEFT JOIN ( SELECT 1 AS Voted, EntityID FROM t2 WHERE t2.UserID = '20' ) AS T ON T.EntityID = t1.PostID WHERE t1.PostID='1' LIMIT 1; PostID Voted 1 NULL DROP TABLE t1,t2;