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create table t1 (a int, b int);
insert into t1 values (1,2),(4,6),(9,7),(1,1),(2,5),(7,8);
values (1,2);
select 1,2 union values (1,2);
values (1,2) union select (1,2);
values (1,2), (3,4) union select 1,2;
select * from t1 where (t1.a,t1.b) in (select 5,7 union values (1,2),(2,3));
select * from t1 where (t1.a,t1.b) in (values (1,2),(2,3) union select 5,7);
let $drop_view= drop view v1;
create view v1 as values (1,2);
eval $drop_view;
create view v1 as values (1,2) union select 3,4;
eval $drop_view;
create view v1 as select 1,2 union values (3,4);
eval $drop_view;
create view v1 as select 1,2 union values (3,4),(5,6);
eval $drop_view;
drop table t1;
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