我发现了以下的NHibernate超时异常:NHibernate的查询超时
could not execute query
与内部异常消息是:
Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
这NHibernate的代码失败:
shareClassReturns = _session.CreateCriteria<ShareClassTrailingReturn>()
.Add(LambdaSubquery.Property<ShareClassTrailingReturn>(x => x.ShareClass.Id).In(GetAvailableShareClassIds()))
.Add(LambdaSubquery.Property<ShareClassTrailingReturn>(x => x.ShareClass.Id).In(GetShareclassIdsInCalculationGroup(peerGroups, classificationTypes)))
.Add<ShareClassTrailingReturn>(c => c.CurrencyId == "GBP")
.AddShareClassReturnOrder(order)
.CreateCriteria<ShareClassTrailingReturn>(scr => scr.ShareClass, JoinType.InnerJoin)
.Add(ApplicableIdentifiers(searchExpression))
.AddShareClassOrder(order)
.SetMaxResults(pageSize)
.List<ShareClassTrailingReturn>();
这是我通过NHibernate Profiler看到的SQL(虽然我已经整理了一下,并全部替换了我与select top 25 *
选择的项目,以使其更具可读性):
SELECT top 25 *
FROM offline.ShareClassTrailingReturn this_
inner join ShareManager.ShareClass shareclass1_
on this_.SCTR_ShareClassId = shareclass1_.ShareClass_Id
left outer join DCS.ShareClassInfo shareclass1_1_
on shareclass1_.ShareClass_Id = shareclass1_1_.[ShareClassInfo_MSShareClassId]
WHERE
this_.SCTR_ShareClassId in
(
SELECT this_0_.[Fund_ID] as y0_
FROM dbo.Fund this_0_
inner join CAP.DataUniverse datauniver1_
on this_0_.[Fund_TypeID] = datauniver1_.[DataUniverse_TypeId]
and this_0_.[Fund_CountryID] = datauniver1_.[DataUniverse_CountryID]
WHERE datauniver1_.[DataUniverse_SiteId] = 100 /* @p0 */
)
and this_.SCTR_ShareClassId in
(
SELECT this_0_.ShareClass_Id as y0_
FROM dbo.vCalculationGroup this_0_
WHERE
this_0_.PeerGroupId in (1,8)
and this_0_.ClassificationId in (7,1)
)
and this_.SCTR_CurrencyId = 'GBP'
and
(
shareclass1_.ShareClass_MEX like '%axa%'
or shareclass1_.ShareClass_SEDOL like '%axa%'
or shareclass1_1_.ShareClassInfo_RIC like '%axa%'
or shareclass1_.ShareClass_ISIN like '%axa%'
or shareclass1_.ShareClass_CUSIP like '%axa%'
)
ORDER BY shareclass1_.ShareClass_Name asc
如果我改变了NHibernate的标准,所以它不会做的选择对vCalculationGroup,也就是说,如果我删除此行:
.Add(LambdaSubquery.Property<ShareClassTrailingReturn>(x => x.ShareClass.Id).In(GetShareclassIdsInCalculationGroup(peerGroups, classificationTypes)))
或这从SQL
and this_.SCTR_ShareClassId in
(
SELECT this_0_.ShareClass_Id as y0_
FROM dbo.vCalculationGroup this_0_
WHERE
this_0_.PeerGroupId in (1,8)
and this_0_.ClassificationId in (7,1)
)
查询出不再倍。这是否意味着我需要对该视图执行某些操作?像索引或什么?
有人能请建议我该如何解决这个问题?
编辑:我应该补充说,查询可以在SQL Server Management Studio中正常运行,并在大约6秒后返回。尽管如此,当我查看执行计划时,它会报告offline.ShareClassTrailingReturn上缺少索引。这可能是问题吗?
很好的建议,谢谢。我们通过连接而不是`In <>()`来解决这个问题 – DaveDev 2011-02-01 20:16:55