INSERT INTO t3 VALUES (0,'qux','qux'),(8,'bar','bar');
SELECT CONCAT( f1, f2 ) AS field FROM t1, t2
WHERE f1 = ANY ( SELECT f1
FROM t1
LEFT JOIN ( t3 AS t3a, t3 AS t3b )
ON ( t3b.f3_key = t3a.f3 )
WHERE t3a.f3 < f1 OR t3b.f3 != f1 );
field
foobar
foobaz
SELECT CONCAT( f1, f2 ) AS field FROM t1, t2
WHERE f1 = ANY ( SELECT f1
FROM t1
LEFT JOIN ( t3 AS t3a, t3 AS t3b )
ON ( t3b.f3_key = t3a.f3 )
WHERE t3a.f3 < f1 OR t3b.f3 != f1 )
ORDER BY field;
field
foobar
foobaz
EXPLAIN EXTENDED SELECT CONCAT( f1, f2 ) AS field FROM t1, t2
WHERE f1 = ANY ( SELECT f1
FROM t1
LEFT JOIN ( t3 AS t3a, t3 AS t3b )
ON ( t3b.f3_key = t3a.f3 )
WHERE t3a.f3 < f1 OR t3b.f3 != f1 )
ORDER BY field;
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 Using temporary; Using filesort
1 PRIMARY t1 system NULL NULL NULL NULL 1 100.00
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t3a ALL NULL NULL NULL NULL 2 100.00 Using where; Start temporary
1 PRIMARY t3b ref f3_key f3_key 6 test.t3a.f3 1 100.00 Using where; End temporary
Warnings:
Note 1003 select concat('foo',`test`.`t2`.`f2`) AS `field` from `test`.`t2` semi join ((`test`.`t3` `t3a` join `test`.`t3` `t3b`)) where ((`test`.`t3a`.`f3` < 'foo') or (`test`.`t3b`.`f3` <> 'foo')) order by concat('foo',`test`.`t2`.`f2`)