postgresql7.1 select to_char(start_date, 'HH24:MI') as start_time, to_char(start_date, 'MM/DD/YYYY') as start_date, to_char(end_date, 'HH24:MI') as end_time, coalesce(a. name, e.name) as name, coalesce(e.description, a.description) as description from acs_activities a, acs_events e, timespans s, time_intervals t where e.timespan_id = s.timespan_id and s.interval_id = t.interval_id and e.activity_id = a.activity_id and e.event_id = :cal_item_id select calendar_id, calendar_name from calendars where acs_permission__permission_p(calendar_id, :user_id, 'calendar_write') = 't' and private_p = 'f';