Named queries with nHibernate - nhibernate

Question

I am having a great deal of trouble getting named queries to work with nHibernate. My latest problem is getting the error message "could not execute query" with no additional information. Are there any complete examples I can download from somewhere because all the tutorials and documentation examples provide code snippits but only tell half the story about getting it to work.
Here is the code that is giving me problems.
Class
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Model.Entities
{
public class TableInfo
{
public string TABLENAME { get; set; }
public string COLUMNNAME { get; set; }
#region Overrides
public override int GetHashCode()
{
int result = TABLENAME.GetHashCode();
result += COLUMNNAME.GetHashCode();
return result;
}
public override bool Equals(object obj)
{
if (obj == null) return false;
TableInfo dict = (TableInfo)obj;
return
dict.TABLENAME.IsEqual(this.TABLENAME) &&
dict.COLUMNNAME.IsEqual(this.COLUMNNAME);
}
#endregion
}
}
Mapping File
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="Model.Entities" assembly="Model" default-lazy="false">
<class name="Model.Entities.TableInfo, Model" table="UIM_TableColumnInfo">
<composite-id>
<key-property name="TABLENAME" column="TABLENAME" type="string"></key-property>
<key-property name="COLUMNNAME" column="COLUMNNAME" type="string"></key-property>
</composite-id>
</class>
<sql-query name="GetTableInfo">
<return alias="tableInfo" class="Model.Entities.TableInfo, Model">
<return-property name="TABLENAME" column="TABLENAME"/>
<return-property name="COLUMNNAME" column="COLUMNNAME"/>
</return>
<![CDATA[
select
info.tci_table_name TABLENAME
, info.tci_column_name COLUMNNAME
from ALL_TAB_COLS c
,( select 'DATE' TYPE_NAME, 'D' data_type_ind from dual
union select 'NUMBER','N' from dual
union select 'VARCHAR2','S' from dual
) ct
, UIM_TableColumnInfo info
where c.DATA_TYPE = ct.TYPE_NAME (+)
and c.column_id is not null
and UPPER(c.TABLE_NAME) = :TableName
and UPPER(c.COLUMN_NAME) = UPPER(info.tci_column_name (+))
order by c.column_id
]]>
</sql-query>
</hibernate-mapping>
Calling Code
public List<TableInfo> GetTableInfo(string tableName)
{
return m_TableInfoRepository
.NamedQuery("GetTableInfo")
.SetString("TableName", tableName)
.List<TableInfo>() as List<TableInfo>;
}

Answer 1

I assume that you have tested before the SQL in your client database, so I think that maybe we should see what is happening inside, so I can recommend you this links;
Named Query Error
Using NHibernate and Log4Net in ASP.NET 2.0 applications
How do I view the SQL that is generated by nHibernate?
Hope it helps.

Answer 2

The inner exception should provide the actual sql that was generated and tried to run. Paste this into a database query and run it directly in the database. This will help guide you. It will be a lot easier once you know why the SQL could not be executed

Answer 3

Maybe I'm wrong but it seems that could be a conflict between the table "TABLENAME" and the parameter ":TableName", what happens if you try to use another parameter name?