DELETE FROM sa USING stage_assignments sa INNER JOIN review_assignments ra ON (sa.submission_id = ra.submission_id AND sa.user_id = ra.reviewer_id) INNER JOIN user_groups ug ON (sa.user_group_id = ug.user_group_id AND ug.role_id = 4096) DELETE FROM sa USING stage_assignments sa INNER JOIN review_assignments ra ON (sa.submission_id = ra.submission_id AND sa.user_id = ra.reviewer_id) INNER JOIN user_groups ug ON (sa.user_group_id = ug.user_group_id AND ug.role_id = 4096) DELETE FROM stage_assignments sa USING review_assignments ra, user_groups ug WHERE sa.submission_id = ra.submission_id AND sa.user_id = ra.reviewer_id AND sa.user_group_id = ug.user_group_id AND ug.role_id = 4096