/* custom error:Insert with different "column_groups" to existing table is not allowed*/
USE plato;

pragma yt.ColumnGroupMode="perusage";

$s1 = select * from Input where a != "";
$s2 = select * from Input where a > "a1";

insert into @a
select * from $s1;

commit;

insert into @a with column_groups="{a=#}"
select * from $s2;