[hibernate-dev] Query#iterate

[Vlad Mihalcea]

I'm for removing it even if it didn't complicate the query parser.

Vlad

On Fri, Jan 27, 2017 at 8:26 PM, Steve Ebersole <steve at hibernate.org> wrote:

> Because the behavior is also fundamentally questionable.
>
> On Fri, Jan 27, 2017 at 12:17 PM Christian Beikov <
> christian.beikov at gmail.com> wrote:
>
> > I'm sorry, I apparently confused iterate() with scroll() then, so forget
> > what I wrote before ^^
> >
> > In face of that new info, I actually don't know of any actual users.
> After
> > thinking a bit about it, why not make that behavior configurable via
> > setProperty and drop that method?
> >
> >
> > Am 27.01.2017 um 19:01 schrieb Steve Ebersole:
> >
> > On Fri, Jan 27, 2017 at 9:51 AM Christian Beikov <
> > christian.beikov at gmail.com> wrote:
> >
> > I just know of people that are using iterate() now for efficient
> > incremental processing, but I guess any other approach(streams maybe?)
> > to do incremental processing would be good enough for these users.
> >
> >
> > ScrollableResults do not meet that need?
> >
> >
> >
> > Unfortunately I don't know what a shallow query is or what the
> > implication on the query or the processing of being shallow are.
> >
> >
> > Just what I said before.  "shallow" is simply a boolean flag that is part
> > of the translator.  It is set to true when the translation is triggered
> > from Query#iterate.  When the translation is triggered from Query#list or
> > Query#scroll it is set to false.
> >
> >
> >
> > I guess this has to do with how row processing is done?
> >
> >
> > The main thing is effects is the SQL we render.  For "entity returns" it
> > simply selects the ids and we expect to then load them (immediately!) by
> > that id (N+1).  Its usefulness is actually VERY limited in scope as it
> > actually performs horrendously in, what, 95-99% of use cases?
> >
> > Interestingly it really does not have much effect on "row processing".
> >
> >
> >
> _______________________________________________
> hibernate-dev mailing list
> hibernate-dev at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/hibernate-dev
>