-- -- content_symlink__is_symlink/1 -- create or replace function content_symlink__is_symlink( integer ) returns bool as $$ declare is_symlink__item_id alias for $1; v_symlink_p boolean; begin select count(*) = 1 into v_symlink_p from cr_symlinks where symlink_id = is_symlink__item_id; return v_symlink_p; end;$$ language plpgsql;