postgresql7.1 select file_storage__get_package_id(fs_objects.object_id) as package_id, case when fs_objects.type = 'url' then file_storage__get_package_id(fs_objects.parent_id) else file_storage__get_package_id(fs_objects.object_id) end as url_package_id, fs_objects.object_id, fs_objects.name, fs_objects.file_upload_name, fs_objects.live_revision, fs_objects.type, fs_objects.content_size from fs_objects where fs_objects.object_id in ([join $list_of_folder_ids ", "]) and acs_permission__permission_p(fs_objects.object_id, :user_id, 'read') order by fs_objects.sort_key, fs_objects.name