NHibernate.Exceptions.GenericADOException:无法执行查询

时间:2012-01-08 01:38:01

标签: c# nhibernate

我有一个遗留应用程序(vfp 8),我需要从中提取数据(无插入)。我使用Accnum字段作为主键,它在表中定义为字符11。

出厂配置:

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-configuration xmlns="urn:nhibernate-configuration-2.2">
<reflection-optimizer use="false" />
<session-factory>
<property name="connection.provider">NHibernate.Connection.DriverConnectionProvider</property>
<property name="dialect">NHibernate.Dialect.GenericDialect</property>
<property name="connection.driver_class">NHibernate.Driver.OleDbDriver</property>
<property name="connection.connection_string">Provider=VFPOLEDB.1;Data Source=C:\Analysis\Quantium\development\RD warehouse\_RDAUWH\Data;Collating Sequence=MACHINE</property>
<property name="show_sql">false</property>
</session-factory>
</hibernate-configuration>

这是我的映射文件:

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
               assembly="RDLabels"
               namespace="RDLabels.Domain">

  <class name="CustMast">
    <id name="Accnum" column="Accnum" type="string">
    <generator class="assigned"/>
    </id>
    <property name="Fullname" />
    <property name="Add" />
    <property name="State" />
  </class>  
</hibernate-mapping>

班级:

public class CustMast
{
    private string _accnum;
    public virtual string Accnum
    {
        get { return _accnum; }
        set { _accnum = value; }
    }
    private string _fullname;
    public virtual string Fullname
    {
        get { return _fullname; }
        set { _fullname = value; }
    }
    private string _add;
    public virtual string Add
    {
        get { return _add; }
        set { _add = value; }
    }
    private string _state;
    public virtual string State
    {
        get { return _state; }
        set { _state = value; }
    }
}

以下是获取记录的代码:

public CustMast GetByAccnum(String accnum)
{
        using (ISession session = NHibernateHelper.OpenSession())
        {
            CustMast custMast = session
                                .CreateCriteria(typeof(CustMast))
                                .Add(Restrictions.Eq("Accnum", accnum))
                                .UniqueResult<CustMast>();
            return custMast;
        }
}

完整错误是:

NHibernate.Exceptions.GenericADOException : could not execute query
[ SELECT this_.Accnum as Accnum0_0_, this_.Fullname as Fullname0_0_, this_.Add as Add0_0_, this_.State as State0_0_ FROM CustMast this_ WHERE this_.Accnum = ? ]
Name:cp0 - Value:00059337444
[SQL: SELECT this_.Accnum as Accnum0_0_, this_.Fullname as Fullname0_0_, this_.Add as Add0_0_, this_.State as State0_0_ FROM CustMast this_ WHERE this_.Accnum = ?]
----> System.IndexOutOfRangeException : Invalid index 0 for this OleDbParameterCollection with Count=0. - d:\CSharp\NH\NH\nhibernate\src\NHibernate\Loader\Loader.cs:1590

运行NHibernate Profiler,它显示:

WARN: 
reflection-optimizer property is ignored out of application configuration file.


WARN: 
System.IndexOutOfRangeException: Invalid index 0 for this OleDbParameterCollection with Count=0.
at System.Data.OleDb.OleDbParameterCollection.RangeCheck(Int32 index)
at System.Data.OleDb.OleDbParameterCollection.GetParameter(Int32 index)
at System.Data.Common.DbParameterCollection.System.Collections.IList.get_Item(Int32 index)
at NHibernate.Driver.DriverBase.ExpandQueryParameters(IDbCommand cmd, SqlString sqlString) in d:\CSharp\NH\NH\nhibernate\src\NHibernate\Driver\DriverBase.cs:line 235
at NHibernate.AdoNet.AbstractBatcher.ExpandQueryParameters(IDbCommand cmd, SqlString sqlString) in d:\CSharp\NH\NH\nhibernate\src\NHibernate\AdoNet\AbstractBatcher.cs:line 232
at NHibernate.Loader.Loader.PrepareQueryCommand(QueryParameters queryParameters, Boolean scroll, ISessionImplementor session) in d:\CSharp\NH\NH\nhibernate\src\NHibernate\Loader\Loader.cs:line 1152

ERROR: 
Invalid index 0 for this OleDbParameterCollection with Count=0.

2 个答案:

答案 0 :(得分:2)

每当我向他们传递一个参数时,我都在努力解决我的linq查询同样的错误。如果我没有传递任何参数并且做了session.Query()它们就可以正常工作。

我挣扎了几天,但我找到了这张Nhibernate jira票here。它解释了SQLParameters和Iseries Db2提供程序的明显问题。

我知道您正在使用其他提供商,但您可能只需下载最新的Nhibernate核心源代码,构建它并引用项目中的最新版本即可获益。它解决了我的问题。

答案 1 :(得分:0)

我要尝试的第一件事是在SQL中运行它,看看会发生什么,因为它可能是一个数据问题。

  

将this_.Accnum选为Accnum0_0_,this_.Fullname为Fullname0_0_,   this_.Add为Add0_0_,this_.State为State0_0_ FROM CustMast this_   在哪里this_.Accnum ='00059337444'

您的数据库中是否将Accnum列定义为字符串类型(varchar,nvarchar等)?

编辑确定下一步是实际确认发送给FoxPro的SQL。您需要设置日志记录(或下载NHProf的试用版)以确定SQL是否正确。你的设置和代码看起来是正确的,但我不是百分之百确定方言的选择,因为这可能会导致你的问题。

我认为你看过thisthis

Edit2 NHProf错误在我看来,它认为您的Id应该是Int32,因为它看起来正在调用at System.Data.OleDb.OleDbParameterCollection.GetParameter(Int32 index)

我认为你需要将它添加到你的映射中: -

<id name="Accnum" column="Accnum" type="string" >

请注意额外的type="string"