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From Erik Bengtson <e...@jpox.org>
Subject Re: IN operator missed?
Date Mon, 13 Nov 2006 17:13:33 GMT
Why not? Have you tried with JPOX ?

Quoting Luca Garulli <l.garulli@orientechnologies.com>:

> Hi,
> Working in real-world applications using JDO 2.0 I beware about the SQL IN
> equivalend operator missed by spec. An example:
>
> public class Questionnaire{
>   ...
>   private Employee employee;
>   ...
> }
>
> I'd like to get any Questionnaire instances for the following employee:
> Luca, Robert and Chris. The CONTAINS operator works only on collection, but
> it could be useful to execute a query like this:
>
> List<Employee> list= new ArrayList<Employee>(); // LET'S THINK E1-E2-E3 are
> loaded before List.add( e1 ); List.add( e2 ); List.add( e3 );
>
> Query query = iManager.newQuery();
> query.setClass( Questionnaire.class );
> query.setFilter( "list.contains( employee )" ); query.declareVariables(
> "java.util.Collection list" ); query.execute( list );
>
> JDO implementation should translate the query by using SQL IN operator and
> the OID of Employee objects contained in the LIST collection passed as
> parameter.
>
> What do you think?
>
> Bye,
> Luca Garulli
> CTO of Asset Data srl
> www.RomaFramework.org
>
>




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