[hibernate-issues] [Hibernate-JIRA] Updated: (HHH-3908) Expose way to fully control fetching in native-sql queries in API

[Steve Ebersole (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-3908?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Ebersole updated HHH-3908:
--------------------------------

    Fix Version/s:     (was: 3.6.0.Beta1)
                   3.6.x

> Expose way to fully control fetching in native-sql queries in API
> -----------------------------------------------------------------
>
>                 Key: HHH-3908
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3908
>             Project: Hibernate Core
>          Issue Type: New Feature
>          Components: core
>            Reporter: Steve Ebersole
>             Fix For: 3.6.x
>
>
> Currently, in order to fully control fetching in native-sql queries, users must revert to using a named sql query (at least the xml, not sure if the annotations variety supports as well).  We alreasy have all the objects/contracts in place to handle this for the named queries, just need to clean-up and properly document them.
> The current API calls to deal with this are the overloaded SQLQuery#addJoin methods.  Ideally I'd see these changed to return the representation of the join-fetch to be configured; but addJoin already defines a return : the query itself :(  So probably we will need new methods like addFetch:
> 1) public JoinFetch addFetch(String alias, String ownerAlias, String ownerProperty)
> 2) public JoinFetch addFetch(String alias, String ownerAlias, String ownerProperty, LockMode lockMode)
> interface JoinFetch {
>     public void addPropertyMapping(String propertyName, String sqlAlias);
> }
> This can be expanded to the "root returns" as well (currently the overloaded #addEntity methods):
> public RootReturn addRoot(String alias, Class entityClass)
> etc...
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Example
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> SQLQuery query = session.createSQLQuery(
>         "select c.cust_id as cid, " +
>         "        c.cust_name as cname, " +
>         "        o.order_id as oid, " +
>         "        o.order_num as onum " + 
>         " from customer c " +
>         "        inner join orders o " +
>         "                on c.cust_id = o.cust_id"
> );
> query.addRoot( "c", Customer.class )
>         .addPropertyMapping( "id", "cid" )
>         .addPropertyMapping( "name", "cname" );
> query.addFetch( "o", "c", "orders" )
>         .addPropertyMapping( "id", "oid" )
>         .addPropertyMapping( "orderNumber", "onum" );
> ...

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