Compiled queries in Linq to Devart Entity Framework

Question

For Compiled Queries, In LINQ to Object Entity FrameWork basically it allows the queries to compile at one time and then it can be re-used without compiling another time.

For Example:

using System.Data.Objects;
public static Func<entity, string, IQueryable<Entity>>
    TestQuery = CompiledQuery.Compile((entity db, string param) =>
        from e in ctx.Entities where e.Field == param select e);

My question is for LINQ to Devart Entity FrameWork , unable to pass the entity . cos it allows only datacontext as a valid parameter.

Please suggest me how to convert the linq to devart entity framework(edml) for Compiled Queries.

NOTE: it working fine in "Devart LinqConnect Model(lqml)" For example :

 public static Func<MyContext.dataContext , long,
             IQueryable<EMyContext.dataContext.tableName>>
           shopByCountry = CompiledQuery.Compile((MyContext.dataContext db,     long idCountry) =>
             from a in db.Countries where a.idCountry == idCountryselect a);

but not in "Devart Entity Model" since edml is "ObjectContext" , lqml is "DataContext"

Thanks in Advance,

Answer 1

CompiledQuery ( http://msdn.microsoft.com/en-us/library/bb896297.aspx ) in Entity Framework is supported only for ObjectContext. There is no such support for DbContext (EF v4.1/EF v4.2): http://blogs.msdn.com/b/adonet/archive/2011/03/02/ef-4-1-is-coming-dbcontext-api-amp-code-first-rtw.aspx . Probably, you are working with DbContext.

In case of Entity Framework June 2011 CTP, it is possible to avoid an explicit compilation because auto-compiled LINQ queries are implemented in EF June 2011 CTP: http://blogs.msdn.com/b/efdesign/archive/2011/06/30/auto-compiled-linq-queries-entity-framework-june-2011-ctp.aspx .