postgresql7.4 select evaluation__party_name(ese.party_id,et.task_id) as party_name, ea.data as answer_data, ea.title as answer_title, ese.party_id, ese.grade, ese.item_id, ese.show_student_p, to_char(ea.last_modified, 'YYYY-MM-DD HH24:MI:SS') as submission_date_ansi, ea.last_modified as submission_date, ese.last_modified as evaluation_date, et.online_p, et.due_date, ese.evaluation_id from evaluation_tasks et, evaluation_student_evalsi ese left outer join evaluation_answersi ea on (ea.party_id = ese.party_id and ea.task_id = ese.task_id and content_revision__is_live(ea.answer_id) = true) where et.task_id = :task_id and et.task_id = ese.task_id and content_revision__is_live(ese.evaluation_id) = true and ese.grade is not null