[hibernate-dev] Query Parser Redesign

[Steve Ebersole]

Yes

On Wed, Aug 26, 2015, 1:48 AM Gunnar Morling <gunnar at hibernate.org> wrote:

> +1 for the new repo. Just forked it and am looking into the amazing
> things you guys built recently :)
>
> Can I push simple stuff to that repo right away (e.g. adding the
> Eclipse plug-in to build.gradle)?
>
> Cheers,
>
> --Gunnar
>
>
> 2015-08-26 0:17 GMT+02:00 Steve Ebersole <steve at hibernate.org>:
> > I also created Jira project ->
> https://hibernate.atlassian.net/projects/SQM
> >
> > On Tue, Aug 25, 2015 at 3:56 PM Steve Ebersole <steve at hibernate.org>
> wrote:
> >
> >> I am starting that work here ->
> >> https://github.com/hibernate/hibernate-semantic-query
> >>
> >>
> >> On Tue, Aug 25, 2015 at 2:21 PM andrea boriero <andrea at hibernate.org>
> >> wrote:
> >>
> >>> no objections
> >>>
> >>> On 25 August 2015 at 20:12, Steve Ebersole <steve at hibernate.org>
> wrote:
> >>>
> >>>> Anyone want to propose an alternative approach to what I have working
> in
> >>>> my Antlr 4 PoC?
> >>>>
> >>>> If not, I think we should move that work to a GitHub Hibernate org
> repo
> >>>> and start tracking work and Jiras there.  Objections?
> >>>>
> >>>> Also its no longer *just* HQL, we also plan to support JPA criteria
> >>>> queries here, interpreting them into semantic query models.  As such I
> >>>> propose the top-level name of hibernate-query-parser, with 2 sub
> projects:
> >>>> hibernate-sqm and hibernate-query-interpreter
> >>>>
> >>>>
> >>>> On Tue, Aug 25, 2015 at 8:45 AM andrea boriero <dreborier at gmail.com>
> >>>> wrote:
> >>>>
> >>>>> I see,
> >>>>>
> >>>>> Thanks
> >>>>>
> >>>>> On 25 August 2015 at 13:17, Steve Ebersole <steve at hibernate.org>
> wrote:
> >>>>>
> >>>>>> from A a where a.b in (from B b ..) and a.c in (from C c ...) ...
> >>>>>>
> >>>>>> But regardless, the children are not important for a stack, just the
> >>>>>> parent.  As I said when we discussed on ORC, the children are just
> >>>>>> maintained because I used them for tests.
> >>>>>>
> >>>>>> On Tue, Aug 25, 2015 at 6:53 AM andrea boriero <dreborier at gmail.com
> >
> >>>>>> wrote:
> >>>>>>
> >>>>>>> Hi Stevej
> >>>>>>>
> >>>>>>> I'm playing with you idea to remove the parent/child from the
> >>>>>>> FromClause and introduce such a structure in the
> FromClauseProcessor.
> >>>>>>>
> >>>>>>> just a question, in the current implementation a fromClause can
> have
> >>>>>>> more than one child fromClause , but I cannot figure out when this
> happen :(
> >>>>>>>
> >>>>>>> Thanks a lot
> >>>>>>>
> >>>>>>> On 25 August 2015 at 04:12, Steve Ebersole <steve at hibernate.org>
> >>>>>>> wrote:
> >>>>>>>
> >>>>>>>> Andrea, this is in relation to something you asked me on IRC
> today.
> >>>>>>>> Specifically in regards to FromClause and the fact that it
> maintains
> >>>>>>>> pointers to parent/children.  As I said on IRC there is no
> intrinsic
> >>>>>>>> need
> >>>>>>>> (I do not foresee) for keeping this structure; I really only did
> that
> >>>>>>>> because FromCauseProcessor needed a stack of FromClauses and the
> >>>>>>>> FromClause
> >>>>>>>> itself made a simple place to do that.
> >>>>>>>>
> >>>>>>>> However, in later work I ran into minor problems because of that
> >>>>>>>> decision.
> >>>>>>>> I need to make a copy of an entire SelectStatement tree.  But
> >>>>>>>> because the
> >>>>>>>> FromClause is held twice (for non-root FromClauses) in the tree,
> it
> >>>>>>>> makes
> >>>>>>>> it more complicated to do a "simple copy" than it need be.
> >>>>>>>> Basically I
> >>>>>>>> need to maintain a "Map<FromClause,FromClause> copy Map" :(
> >>>>>>>>
> >>>>>>>> Long story short, I think I might revisit that decision and
> instead
> >>>>>>>> write a
> >>>>>>>> dedicated stack in FromClauseProcessor for this.  In the
> morning...
> >>>>>>>> its too
> >>>>>>>> late to start something that ambitious tonight.  I'll start that
> in
> >>>>>>>> the
> >>>>>>>> morning, unless someone wants to pick that up in the next few
> hours
> >>>>>>>> before
> >>>>>>>> I get back on line.
> >>>>>>>>
> >>>>>>> _______________________________________________
> >>>>>>>> hibernate-dev mailing list
> >>>>>>>> hibernate-dev at lists.jboss.org
> >>>>>>>> https://lists.jboss.org/mailman/listinfo/hibernate-dev
> >>>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>
> >>>
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