BEGIN;
alter table phoneline drop column when_unconditional;
alter table phoneline drop column when_unconditional_number;
alter table phoneline drop column when_busy;
alter table phoneline drop column when_busy_number;
alter table phoneline drop column when_noanswer;
alter table phoneline drop column when_noanswer_number;
alter table phoneline drop column when_noanswer_after;
alter table phoneline drop column when_loggedoff;
alter table phoneline drop column when_loggedoff_number;
COMMIT;
