将Spring Data JPA与QueryDsl一起使用，分页查询会中断排序

Question

给定以下查询，我的结果按顺序号降序排序。当试图返回分页结果时，排序似乎中断了。我尝试过不使用。orderby（）表达式并在QPageRequest中添加QSort实例。我尝试过直接调用applySorting（）方法并传递一个QSort，但是对于所有密集的目的来说，分页调用破坏了我尝试的任何排序。

我使用的是QueryDsl 3.3.4和Spring Data JPA 1.6.4。由Spring IO BOM 1.0.3导入。

public List<Object[]> findAll(PersonProfile personProfile) {
    QOrderStop shipper = new QOrderStop("shipper");
    QOrderStop consignee = new QOrderStop("consignee");
    JPQLQuery query = this.from(order)
            .leftJoin(order.orderStops, shipper).on(shipper.originalStopSequence.eq(BigDecimal.valueOf(1)))
            .leftJoin(order.orderStops, consignee).on(consignee.originalStopSequence.intValue().eq(order.orderStops.size()))
            .where(order.company.eq(company).and(OrderExpressions.customerCodePredicate(order, personProfile)))
            .orderBy(order.number.desc());

    //this.getQuerydsl().applyPagination(new QPageRequest(0, 10), query);

    return query
            .list(
                    order.number, order.status, order.shipperReferenceNumber, order.consigneeReferenceNumber,
                    order.shipperCustomer.billingCity, order.shipperCustomer.state,
                    shipper.latestScheduleDate, shipper.latestScheduleTime,
                    order.consigneeCustomer.billingCity, order.consigneeCustomer.state,
                    consignee.latestScheduleDate, consignee.latestScheduleTime
            ).stream()
            .map(Tuple::toArray)
            .collect(toList());
}

select order1
from Order order1
  left join order1.orderStops as shipper on shipper.originalStopSequence = ?1
  left join order1.orderStops as consignee on cast(consignee.originalStopSequence integer) = size(order1.orderStops)
where order1.company = ?2 and (order1.customer = ?3 or order1.billTo in ?4 or order1.shipper in ?5 or order1.consignee in ?5)
order by order1.number desc

select order1
from Order order1
  left join order1.orderStops as shipper on shipper.originalStopSequence = ?1
  left join order1.orderStops as consignee on cast(consignee.originalStopSequence integer) = size(order1.orderStops)
where order1.company = ?2 and (order1.customer = ?3 or order1.billTo in ?4 or order1.shipper in ?5 or order1.consignee in ?5)
order by order1.number desc

SELECT * FROM (SELECT * FROM (SELECT EL_TEMP.*, ROWNUMBER() OVER() AS EL_ROWNM FROM (SELECT t0.OHOR# AS a1, t0.OHORST AS a2, t0.OHSRF# AS a3, t0.OHCRF# AS a4, t1.CUBCTY AS a5, t1.CUBST AS a6, t2.BSLSDT AS a7, t2.BSLSTM AS a8, t3.CUBCTY AS a9, t3.CUBST AS a10, t4.BSLSDT AS a11, t4.BSLSTM AS a12 FROM LIB.DPORDHP t0 LEFT OUTER JOIN LIB.DPORDSP t2 ON (((t2.BSOR# = t0.OHOR#) AND ((t2.BSOL# = t0.OHORS#) AND (t2.BSCM = t0.OHCM))) AND (t2.BSRSQS = ?)) LEFT OUTER JOIN LIB.DPORDSP t4 ON (((t4.BSOR# = t0.OHOR#) AND ((t4.BSOL# = t0.OHORS#) AND (t4.BSCM = t0.OHCM))) AND (CAST(t4.BSRSQS AS integer) = (SELECT COUNT(t5.BSOR#) FROM LIB.DPORDSP t5 WHERE ((t5.BSOR# = t0.OHOR#) AND ((t5.BSOL# = t0.OHORS#) AND (t5.BSCM = t0.OHCM)))))), LIB.SWCUSTP t3, LIB.SWCUSTP t1 WHERE (((t0.OHCM = ?) AND ((((t0.OHCUST = ?) OR (t0.OHBID IN (?,?))) OR (t0.OHSID IN (?,?,?,?,?,?,?,?,?,?))) OR (t0.OHCID IN (?,?,?,?,?,?,?,?,?,?)))) AND (((t1.CUCID = t0.OHSID) AND (t1.CUCM = t0.OHCM)) AND ((t3.CUCID = t0.OHCID) AND (t3.CUCM = t0.OHCM)))) ORDER BY t0.OHOR# DESC) AS EL_TEMP) AS EL_TEMP2 WHERE EL_ROWNM <= ?) AS EL_TEMP3 WHERE EL_ROWNM > ?

Answer 1

我不知道applyPagination是如何打破顺序的，但这里使用query.limit和query.offset可能更直观，因为您在存储库方法中。

...
.orderBy(order.number.desc()).
.limit(pageSize)
.offset((page-1) * pageSize);