- (SELECT `uri-id` FROM `item` WHERE `gravity` = ? AND `uid` = ? AND `received` < ?
- AND NOT `uri-id` IN (SELECT `parent-uri-id` FROM `item` WHERE `uid` != ?)
- AND NOT `uri-id` IN (SELECT `parent-uri-id` FROM `item` WHERE `uid` = ? AND `received` > ?))
+ (SELECT `uri-id` FROM `item` WHERE `gravity` = ? AND `uid` = ? AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY
+ AND NOT `uri-id` IN (SELECT `parent-uri-id` FROM `item` AS `i` WHERE `i`.`uid` != ?
+ AND `i`.`parent-uri-id` = `item`.`uri-id`)
+ AND NOT `uri-id` IN (SELECT `parent-uri-id` FROM `item` AS `i` WHERE `i`.`uid` = ?
+ AND `i`.`parent-uri-id` = `item`.`uri-id` AND `i`.`received` > UTC_TIMESTAMP() - INTERVAL ? DAY))