我發現了以下的NHibernate超時異常:NHibernate的查詢超時
could not execute query
與內部異常消息是:
Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
這NHibernate的代碼失敗:
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>();
這是我通過NHibernate Profiler看到的SQL(雖然我已經整理了一下,並全部替換了我與select top 25 *
選擇的項目,以使其更具可讀性):
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
如果我改變了NHibernate的標準,所以它不會做的選擇對vCalculationGroup,也就是說,如果我刪除此行:
.Add(LambdaSubquery.Property<ShareClassTrailingReturn>(x => x.ShareClass.Id).In(GetShareclassIdsInCalculationGroup(peerGroups, classificationTypes)))
或這從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)
)
查詢出不再倍。這是否意味着我需要對該視圖執行某些操作?像索引或什麼?
有人能請建議我該如何解決這個問題?
編輯:我應該補充說,查詢可以在SQL Server Management Studio中正常運行,並在大約6秒後返回。儘管如此,當我查看執行計劃時,它會報告offline.ShareClassTrailingReturn上缺少索引。這可能是問題嗎?
很好的建議,謝謝。我們通過連接而不是`In <>()`來解決這個問題 – DaveDev 2011-02-01 20:16:55