create table t1 (a int, b int) engine=MyISAM;
create table t2 (c int, d int) engine=MyISAM;
insert into t1 values (1,1),(2,2),(3,3),(2,2),(4,4),(4,4),(4,4);
insert into t2 values (1,1),(1,1),(1,1),(2,2),(3,3),(3,3),(5,5);

select * from t1 except select * from t2;
select * from t1 except all select * from t2;
select * from t1 except all select c+1,d+1 from t2;
(select * from t1) except all (select * from t2);
select * from ((select * from t1) except all (select * from t2)) a;
select * from ((select a from t1) except all (select c from t2)) a;
select * from t1 except all select * from t1 union all select * from t1 union all select * from t1 except select * from t2;

select * from t1 except all select * from t1 union all select * from t1 union all select * from t1 except all select * from t2;

select * from (select * from t1 except all select * from t2) q1 except all select * from (select * from t1 except all select * from t2) q2;

EXPLAIN select * from t1 except all select * from t2;
EXPLAIN format=json select * from t1 except all select * from t2;
EXPLAIN extended (select * from t1) except all (select * from t2);
EXPLAIN extended select * from ((select * from t1) except all (select * from t2)) a;

--source include/analyze-format.inc
ANALYZE format=json select * from ((select a,b from t1) except all (select c,d from t2)) a;
--source include/analyze-format.inc
ANALYZE format=json select * from ((select a from t1) except all (select c from t2)) a;
select * from ((select a from t1) except all (select c from t2)) a;

prepare stmt from "(select a,b from t1) except all (select c,d from t2)";
execute stmt;
execute stmt;

prepare stmt from "select * from ((select a,b from t1) except all (select c,d from t2)) a";
execute stmt;
execute stmt;

drop tables t1,t2;

create table t1 (a int, b int) engine=MyISAM;
create table t2 (c int, d int) engine=MyISAM;
create table t3 (e int, f int) engine=MyISAM;
create table t4 (g int, h int) engine=MyISAM;
insert into t1 values (1,1),(2,2),(2,2);
insert into t2 values (2,2),(3,3);
insert into t3 values (4,4),(5,5),(4,4);
insert into t4 values (4,4),(7,7),(4,4);

(select a,b,e,f from t1,t3) except all (select c,d,g,h from t2,t4);
select * from ((select a,b,e,f from t1,t3) except all (select c,d,g,h from t2,t4)) t;
(select * from t1,t3) except all (select * from t2,t4);
(select a,b,e from t1,t3) except all (select c,d,g from t2,t4);

EXPLAIN (select a,b,e,f from t1,t3) except all (select c,d,g,h from t2,t4);
EXPLAIN select * from ((select a,b,e,f from t1,t3) except all (select c,d,g,h from t2,t4)) t;
EXPLAIN extended select * from ((select a,b,e,f from t1,t3) except all (select c,d,g,h from t2,t4)) t;
EXPLAIN format=json select * from ((select a,b,e,f from t1,t3) except all (select c,d,g,h from t2,t4)) t;

--source include/analyze-format.inc
ANALYZE format=json (select a,b,e,f from t1,t3) except all (select c,d,g,h from t2,t4);
--source include/analyze-format.inc
ANALYZE format=json select * from ((select a,b,e,f from t1,t3) except all (select c,d,g,h from t2,t4)) t;

prepare stmt from "(select a,b,e,f from t1,t3) except all (select c,d,g,h from t2,t4)";
execute stmt;
execute stmt;

prepare stmt from "select * from ((select a,b,e,f from t1,t3) except all (select c,d,g,h from t2,t4)) a";
execute stmt;
execute stmt;

drop tables t1,t2,t3,t4;

select 1 as a from dual except all select 1 from dual;
(select 1 from dual) except all (select 1 from dual);
--error ER_PARSE_ERROR
(select 1 from dual into @v) except all (select 1 from dual);
--error ER_PARSE_ERROR
select 1 from dual ORDER BY 1 except all select 1 from dual;
select 1 as a from dual union all select 1 from dual;

create table t1 (a int, b blob, a1 int, b1 blob) engine=MyISAM;
create table t2 (c int, d blob, c1 int, d1 blob) engine=MyISAM;
insert into t1 values (1,"ddd", 1, "sdfrrwwww"),(2, "fgh", 2, "dffggtt"),(2, "fgh", 2, "dffggtt");
insert into t2 values (2, "fgh", 2, "dffggtt"),(3, "ffggddd", 3, "dfgg");


(select a,b,b1 from t1) except all (select c,d,d1 from t2);
# make sure that blob is used
create table t3 (select a,b,b1 from t1) except all (select c,d,d1 from t2);
show create table t3;

drop tables t1,t2,t3;

CREATE TABLE t (i INT);
INSERT INTO t VALUES (1),(2);

SELECT * FROM t WHERE i != ANY ( SELECT 3 EXCEPT ALL SELECT 3 );

drop table t;