.net - Entity Framework Left Outer Joins and Group into throws : ORA-00907: missing right parenthesis

Question

我在基于 Entity Framework 的数据访问中使用 Entity Framework 来定位多个数据库。

我们是一个使用 Entity Framework 的团队，至今已有 2 年，生成的代码与 sql server 2008 完美配合。现在，我们正在将数据库迁移到 Oracle 11 express r2g2 后测试相同的代码，以及所有指令使左外连接或分组进入选择抛出显示此调用堆栈的异常:

System.Data.EntityCommandExecutionException was unhandled by user code
Message=An error occurred while executing the command definition. See the inner exception for details.
Source=System.Data.Entity
StackTrace:
at System.Data.EntityClient.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior)
at System.Data.Objects.Internal.ObjectQueryExecutionPlan.Execute[TResultType](ObjectContext context, ObjectParameterCollection parameterValues)
at System.Data.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption)
at System.Data.Objects.ObjectQuery`1.System.Collections.Generic.IEnumerable<T>.GetEnumerator()
at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
at Futura.BusinessLogic.Services.DemandeHospitalisationServices.DemandeHospitalisationService.GetMedecinList() in C:\Work\FuturaSmartDesign\Futura.BusinessLogic\Services\DemandeHospitalisationServices\DemandeHospitalisationService.cs:line 87
at GetMedecinList(DomainService , Object[] )
at System.ServiceModel.DomainServices.Server.ReflectionDomainServiceDescriptionProvider.ReflectionDomainOperationEntry.Invoke(DomainService domainService, Object[] parameters)
at System.ServiceModel.DomainServices.Server.DomainOperationEntry.Invoke(DomainService domainService, Object[] parameters, Int32& totalCount)
at System.ServiceModel.DomainServices.Server.DomainService.Query(QueryDescription queryDescription, IEnumerable`1& validationErrors, Int32& totalCount)
InnerException: Oracle.DataAccess.Client.OracleException
Message=ORA-00907: missing right parenthesis
Source=Oracle Data Provider for .NET
ErrorCode=-2147467259
DataSource=Calys
Number=907
Procedure=""
StackTrace:
at Oracle.DataAccess.Client.OracleException.HandleErrorHelper(Int32 errCode, OracleConnection conn, IntPtr opsErrCtx, OpoSqlValCtx* pOpoSqlValCtx, Object src, String procedure, Boolean bCheck, Exception innerException)
at Oracle.DataAccess.Client.OracleException.HandleError(Int32 errCode, OracleConnection conn, String procedure, IntPtr opsErrCtx, OpoSqlValCtx* pOpoSqlValCtx, Object src, Boolean bCheck, Exception innerException)
at Oracle.DataAccess.Client.OracleCommand.ExecuteReader(Boolean requery, Boolean fillRequest, CommandBehavior behavior)
at Oracle.DataAccess.Client.OracleCommand.ExecuteDbDataReader(CommandBehavior behavior)
at System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior)
at System.Data.EntityClient.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior)
InnerException:
Message=Oracle 11.2.0.2.0 ne prend pas en charge APPLY
InnerException:

任何帮助将不胜感激，提前致谢。

Answer 1

这是由于 Entity Framework 生成的代码:CROSS/OUTER APPLY；甲骨文不支持。这是在 Connect 上报告的， https://connect.microsoft.com/VisualStudio/feedback/details/739458/linq-query-whene-used-with-oracle-11-g2-getting-ora-00907-missing-right-parenthesis

在 MS Connect 平台上任何解决方法都将受到赞赏