我想使用QueryOver获取以下查询
select
cg.CoverageGrpId,
SUM(cp.PremiumDueAmt) + SUM(cf.PremiumDueAmt) as TotalPremium,
SUM(pa.PaymentAllocAmt) as AllocatedAmount, p.ClientPolicyId,
(SELECT MAX(c2.CvrgExpDt) FROM Coverage c2 where c2.CoverageGrpId = cg.CoverageGrpId) as CoverageExpDate,
(SELECT MIN(c3.CvrgEffDt) FROM Coverage c3 where c3.CoverageGrpId = cg.CoverageGrpId) as CoverageEffDate
from dbo.vw_D_CoverageGroup cg
inner join dbo.vw_D_Batch b on b.PremCvrgBatchId = cg.PremCvrgBatchId
inner join dbo.vw_D_ClientPolicy p on p.ClientPolicyId = cg.ClientPolicyId
inner join dbo.vw_D_Bid bd on bd.BidId = p.BidId
inner join dbo.vw_D_CoverageGroupRow cgr on cgr.CoverageGrpId = cg.CoverageGrpId
inner join dbo.vw_D_Coverage c on c.CoverageGrpRowId = cgr.CoverageGrpRowId
left outer join dbo.vw_D_CoveragePremium cp on c.CoverageId = cp.CoverageId
left outer join dbo.vw_D_CoverageFee cf on cf.CoverageId = cp.CoverageId
left outer join dbo.vw_D_PaymentAllocation pa on pa.CoverageGrpId = cg.CoverageGrpId
where c.PrimaryInsuredId = 701112800 and b.BatchTypeCd = 'INDV'
group by cg.CoverageGrpId, p.ClientPolicyId
order by cg.CoverageGrpId, p.ClientPolicyId
以下是QueryOver，一旦我添加了评论部分，它就会搞砸了。
var dto = new InsuredCoveragePayments();
Coverage coverage = null;
CoverageGroup coverageGroup = null;
CoverageGroupRow coverageGroupRow = null;
Batch batch = null;
PaymentAllocation paymentAllocation = null;
CoveragePremium coveragePremium = null;
CoverageFee coverageFee = null;
ClientPolicy clientPolicy = null;
Bid bid = null;
var l = _session.QueryOver<CoverageGroup>(() => coverageGroup)
.JoinAlias(cg => cg.Batch, () => batch)
.JoinAlias(cg => cg.ClientPolicy, () => clientPolicy)
.JoinAlias(cg => clientPolicy.Bid, () => bid)
.JoinAlias(cg => cg.PaymentAllocations, () => paymentAllocation, JoinType.LeftOuterJoin)
.JoinQueryOver(cg => cg.CoverageGroupRows, () => coverageGroupRow)
.JoinQueryOver(cgr => cgr.Coverages, () => coverage)
.JoinAlias(c => c.Premium, () => coveragePremium, JoinType.LeftOuterJoin)
.JoinAlias(c => c.Fees, () => coverageFee, JoinType.LeftOuterJoin)
.Where(x => coverage.PrimaryInsured.Id == 701112800)
.SelectList(list =>
list.Select(Projections.Group<CoverageGroup>(x => x.Id))
.WithAlias(() => dto.CoverageGroupId)
.Select(Projections.Group<ClientPolicy>(x => clientPolicy.PolicyNumber))
.WithAlias(() => dto.ClientPolicyNumber)
.Select(Projections.Sum<CoveragePremium>(x => coveragePremium.Amount))
.WithAlias(() => dto.PremiumAmount)
.Select(Projections.Sum<CoverageFee>(x => coverageFee.Amount))
.WithAlias(() => dto.FeeAmount)
.Select(Projections.Sum<PaymentAllocation>(x => paymentAllocation.AllocatedAmount))
.WithAlias(() => dto.AllocatedAmount))
//this messes the query up, it removes all 'select' parts and adds only subquery
//.Select(Projections.SubQuery(
// QueryOver.Of<Coverage>()
// .Where(c => c.CoverageGroup.Id == coverageGroup.Id)
// .SelectList(cl =>
// cl.SelectMin(c => c.CoverageEffectiveDates.Start.Value)
// .WithAlias(() => dto.CoverageFrom))))
//.Select(Projections.SubQuery
// (QueryOver.Of<Coverage>()
// .Where(c => c.CoverageGroup.Id == coverageGroup.Id)
// .SelectList(cl2 =>
// cl2.SelectMax(c => c.CoverageEffectiveDates.End.Value)
// .WithAlias(() => dto.CoverageTo))))
.TransformUsing(new AliasToBeanResultTransformer(typeof(InsuredCoveragePayments)))
.List<InsuredCoveragePayments>();
NHibernate生成输出
没有SubQuery
SELECT this_.CoverageGrpId as y0_,
clientpoli2_.Year as y1_,
clientpoli2_.ClientNumber as y2_,
clientpoli2_.BidOptionNumber as y3_
sum(coveragepr7_.PremiumDueAmt) as y4_,
sum(coveragefe8_.PremiumDueAmt) as y5_,
sum(paymentall4_.PaymentAllocAmt) as y6_
FROM vw_D_CoverageGroup this_
inner join vw_D_CoverageGroupRow coveragegr5_ on this_.CoverageGrpId=coveragegr5_.CoverageGrpId
inner join vw_D_Coverage coverage6_ on coveragegr5_.CoverageGrpRowId=coverage6_.CoverageGrpRowId
left outer join vw_D_CoverageFee coveragefe8_ on coverage6_.CoverageId=coveragefe8_.CoverageId
left outer join vw_D_CoveragePremium coveragepr7_ on coverage6_.CoverageId=coveragepr7_.CoverageId
left outer join vw_D_PaymentAllocation paymentall4_ on this_.CoverageGrpId=paymentall4_.CoverageGrpId
inner join vw_D_Batch batch1_ on this_.PremCvrgBatchId=batch1_.PremCvrgBatchId
inner join vw_D_ClientPolicy clientpoli2_ on this_.ClientPolicyId=clientpoli2_.ClientPolicyId
inner join vw_D_Bid bid3_ on clientpoli2_.BidId=bid3_.BidId
WHERE coverage6_.PrimaryInsuredId = @p0
GROUP BY this_.CoverageGrpId, clientpoli2_.Year,clientpoli2_.ClientNumber,clientpoli2_.BidOptionNumber;
@p0 = 701112800 [Type: Int32 (0)]
使用SubQuery（均未注释）
SELECT
(SELECT max(this_0_.CvrgExpDt) as y0_
FROM vw_D_Coverage this_0_
WHERE this_0_.CoverageGrpId = this_.CoverageGrpId) as y0_
FROM vw_D_CoverageGroup this_
inner join vw_D_CoverageGroupRow coveragegr5_ on this_.CoverageGrpId=coveragegr5_.CoverageGrpId
inner join vw_D_Coverage coverage6_ on coveragegr5_.CoverageGrpRowId=coverage6_.CoverageGrpRowId
left outer join vw_D_CoverageFee coveragefe8_ on coverage6_.CoverageId=coveragefe8_.CoverageId
left outer join vw_D_CoveragePremium coveragepr7_ on coverage6_.CoverageId=coveragepr7_.CoverageId
left outer join vw_D_PaymentAllocation paymentall4_ on this_.CoverageGrpId=paymentall4_.CoverageGrpId
inner join vw_D_Batch batch1_ on this_.PremCvrgBatchId=batch1_.PremCvrgBatchId
inner join vw_D_ClientPolicy clientpoli2_ on this_.ClientPolicyId=clientpoli2_.ClientPolicyId
inner join vw_D_Bid bid3_ on clientpoli2_.BidId=bid3_.BidId
WHERE coverage6_.PrimaryInsuredId = @p0;@p0 = 701112800 [Type: Int32 (0)]
正如您所看到的，当我取消注释SubQuery时，它不仅返回select中的其他部分，而且还只生成一个子查询。为什么呢？
答案 0 :(得分：0)
想出来。在SubQuery部分中，我将WithAlias放在错误的位置。看起来应该是这样的
var l = _session.QueryOver<CoverageGroup>(() => coverageGroup)
.JoinAlias(cg => cg.Batch, () => batch)
.JoinAlias(cg => cg.ClientPolicy, () => clientPolicy)
.JoinAlias(cg => clientPolicy.Bid, () => bid)
.JoinAlias(cg => cg.PaymentAllocations, () => paymentAllocation, JoinType.LeftOuterJoin)
.JoinQueryOver(cg => cg.CoverageGroupRows, () => coverageGroupRow)
.JoinQueryOver(cgr => cgr.Coverages, () => coverage)
.JoinAlias(c => c.Premium, () => coveragePremium, JoinType.LeftOuterJoin)
.JoinAlias(c => c.Fees, () => coverageFee, JoinType.LeftOuterJoin)
.Where(x => coverage.PrimaryInsured.Id == 701112800)
.SelectList(list =>
list
.Select(Projections.Group<CoverageGroup>(x => x.Id))
.WithAlias(() => dto.CoverageGroupId)
.Select(Projections.Group<ClientPolicy>(x => clientPolicy.PolicyNumber))
.WithAlias(() => dto.ClientPolicyNumber)
.Select(Projections.Sum<CoveragePremium>(x => coveragePremium.Amount))
.WithAlias(() => dto.PremiumAmount)
.Select(Projections.Sum<CoverageFee>(x => coverageFee.Amount))
.WithAlias(() => dto.FeeAmount)
.Select(Projections.Sum<PaymentAllocation>(x => paymentAllocation.AllocatedAmount))
.WithAlias(() => dto.AllocatedAmount)
.Select(Projections.SubQuery
(QueryOver.Of<Coverage>()
.Where(c => c.CoverageGroup.Id == coverageGroup.Id)
.SelectList(cl =>
cl.SelectMin(c => c.CoverageEffectiveDates.Start.Value))))
.WithAlias(() => dto.CoverageFrom)
.Select(Projections.SubQuery
(QueryOver.Of<Coverage>()
.Where(c => c.CoverageGroup.Id == coverageGroup.Id)
.SelectList(cl2 =>
cl2.SelectMax(c => c.CoverageEffectiveDates.End.Value))))
.WithAlias(() => dto.CoverageTo) )
.TransformUsing(new AliasToBeanResultTransformer(typeof(InsuredCoveragePayments)))
.List<InsuredCoveragePayments>();