Hi Alex,

Yes, it works!
Now, i think, we need slightly change all the functions like the build_orphan_check? I mean the following strings:

my $sth = $rel->select ('left_join', $sel, GT::SQL::Condition->new('LinkID', 'IS', \'NULL'));

Am i right, or LinksSQL will automaticly convert 'left_join' to something like '(+)' for Oracle?

Thank you very much,
Anton