[hibernate-dev] [HSEARCH] Full-text query returning projection of one element

Sanne Grinovero sanne at hibernate.org
Thu Jan 29 07:31:35 EST 2015

I hadn't noticed that HQL projections would do that.
It seems useful indeed, but also quite irregular.. I'm not too
convinced, I guess I'd be happier if we could express the difference
on the method signature's return type.

I tend to agree that we should conform to the list() contract, but
this is unlikely to be an welcome change for existing users.
If you all agree it's an improvement, I'd schedule such an issue for 6?


On 29 January 2015 at 08:49, Gunnar Morling <gunnar at hibernate.org> wrote:
> Hi,
> When doing a full-text query which projects exactly one column, e.g. like
> so:
>     List<?> list = fullTextSession.createFullTextQuery( query, MyEntity.
> class )
>         .setProjection( ProjectionConstants.ID )
>         .list();
> Then each list element will be a single-column array, containing the
> projection result.
> I'd rather have expected the list to contain the single column values
> directly in this case. That's what HQL projection do and seems implied by
> the docs of list().
> Is it done differently in HSEARCH on purpose or should it be considered a
> bug?
> Thx,
> --Gunnar
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