Java 如何将HQL子句（WHERE COUNT（）<；MAX_VAL）添加到复杂查询中

现在，我的查询返回航班地图及其票数。 我的目标是从查询结果

（count（t）

中排除所有航班。但我无法创建这样的查询。所以现在我必须在方法中排除完整航班，这很令人沮丧，因为我认为应该有办法在查询中做到这一点。有人能帮助建立查询吗？p、 我现在可以使用标准API

String queryString = "SELECT f, COUNT(t)"
            + " FROM Flight f"
            + " JOIN FETCH f.tickets AS t"
            + " WHERE f.departureAirport=:departureAirport"
            + " GROUP BY t.flight"
            + " ORDER BY f.id ASC";

Query query = em.createQuery(queryString);
query.setParameter("departureAirport", departureAirport);

Map<Flight, Long>) flightsTicketCountMap =
            query.getResultList().stream()
            .collect(Collectors.toMap(resultElement -> (Flight) (((Object[]) resultElement)[0]),
                    resultElement -> (Long) (((Object[]) resultElement)[1])));

//below i exclude full flights from map, but i want to do it in query
Map<Flight, Long> availableFlightTicketPriceMap = new HashMap();
for (Map.Entry<Flight, Long> entry : flightsTicketCountMap.entrySet()) {
        flight = entry.getKey();
        ticketsQuantity = entry.getValue();
        if (flight.getAircraft().getModel().getPassengersSeatsQuantity() > ticketsQuantity) {
            availableFlightTicketPriceMap.put(flight, calculateTicketPrice(tariffsDetails, flight, ticketsQuantity));
        }
    }

---

您是否尝试添加

HAVING

子句

SELECT f, COUNT(t)
FROM Flight f
JOIN FETCH f.tickets AS t
WHERE f.departureAirport=:departureAirport
GROUP BY t.flight
HAVING COUNT(t) < f.aircraft.model.passengersSeatsQuantity
ORDER BY f.id ASC

选择f，计数（t）
f航班
加入获取f.tickets作为t
其中f.departureAirport=：departureAirport
按t航班分组
数量（t）

我刚刚尝试并获得了com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException:having子句中的未知列“aircraftmo4.passenger\u seats\u quantity”，但飞机和型号都有急切的抓取策略，因此无法添加JOIN f.aircraft JOIN f.aircraft.model，这也没有帮助（相同的例外）。嗯，奇怪的行为我很确定你想要的就是拥有。您可能需要整理您自己的HQL，而且您很可能在我整理之前就这样做了，因为您面前有模式/实体。好的，谢谢！我会继续努力让它工作。刚刚用其他信息更新了我的问题

SELECT f, COUNT(t)
FROM Flight f
JOIN FETCH f.tickets AS t
WHERE f.departureAirport=:departureAirport
GROUP BY t.flight
HAVING COUNT(t) < f.aircraft.model.passengersSeatsQuantity
ORDER BY f.id ASC