NHibernate-从映射存储过程返回输出参数
我有一个通过NHibernate映射的存储过程。存储过程同时返回一个结果集和一个输出参数,基本上是结果集本身后面的总记录数。大概是这样的:NHibernate-从映射存储过程返回输出参数,nhibernate,stored-procedures,nhibernate-mapping,Nhibernate,Stored Procedures,Nhibernate Mapping,我有一个通过NHibernate映射的存储过程。存储过程同时返回一个结果集和一个输出参数,基本上是结果集本身后面的总记录数。大概是这样的: CREATE PROCEDURE [dbo].[mySproc] ( @StartRecord INT = 1, @EndRecord INT = 10, @TotalRecords INT OUTPUT ) AS BEGIN SET NOCOUNT ON
CREATE PROCEDURE [dbo].[mySproc]
(
@StartRecord INT = 1,
@EndRecord INT = 10,
@TotalRecords INT OUTPUT
)
AS
BEGIN
SET NOCOUNT ON
// Do a count
SELECT @TotalRecords = COUNT(DISTINCT x.Id)
FROM Blah ...snip
// Perform a query with paging
SELECT
x.Id,
x.Column1
FROM ...some really complex query that uses paging
END
我通过存储过程实现分页,因此需要获取记录的总数。查询非常复杂,跨多个表进行连接,可能速度非常慢,因此需要通过直接编写T-SQL进行谨慎、微调和优化
我的问题是无法在存储过程(@TotalRecords)中获取输出参数。我已将此存储过程映射为:
<class name="MyLibrary.SomeClass, MyLibrary">
<id name="Id" type="Int32" />
<property name="Column1" type="String" length="50" not-null="false" />
</class>
<sql-query name="mySproc">
<return class="MyLibrary.SomeClass, MyLibrary">
<return-property name="Id" column="Id"/>
<return-property name="Column1" column="Column1"/>
</return>
EXEC mySproc
@StartRecord = :startRecord,
@EndRecord = :endRecord,
@TotalRecords = 0
</sql-query>
执行mySproc
@StartRecord=:StartRecord,
@EndRecord=:EndRecord,
@TotalRecords=0
我可以得到这样的结果集:
IList<SomeClass> records = Session.GetNamedQuery("mySproc")
.SetParameter("startRecord", 1, NHibernateUtil.Int32)
.SetParameter("endRecord", 20, NHibernateUtil.Int32)
.List<SomeClass>();
IList records=Session.GetNamedQuery(“mySproc”)
.SetParameter(“startRecord”,1,NHibernateUtil.Int32)
.SetParameter(“endRecord”,20,NHibernateUtil.Int32)
.List();
但是如何获取@TotalRecords输出参数?似乎无法直接完成: