Re: [hibernate-dev] HQL and spatial
On Mon, Nov 9, 2015 at 2:52 PM Karel Maesen <karel(a)geovise.com> wrote:
Hi Steve,
> On 02 Nov 2015, at 16:16, Steve Ebersole <steve(a)hibernate.org> wrote:
>
> Any further thoughts?
>
> I looked over the link you gave in regards to literals, but did not
fully understand. I'd prefer this follow some "escape syntax" form,
beyond
that maybe you could just enumerate the literal types you'd want to support
and their formats.
Spatial literals would be really nice to have, but then it is best to have
also spatial functions in the grammar. So let’s try to add them. The escape
syntax form is OK for me. We can have something like ‘{gm
‘SRID=4326;POINT(4.6 52.1)’}’ for a geometry literal.
I think it's best to not have the functions defined in the grammar.
Accounting for literals and accounting for functions are really 2 very
different things.
As for what I need... Well I need to understand what spatial types you'd
like to see definable as literals and what forms those literal definitions
might take. Like looking at your "example" one, I have zero clue what that
is supposed to mean.
How do we proceed? Do I write something up informally? Or is there a
formalism you prefer?
For now, I think conversation (here, irc, whatever) is better. Let's see
where that leads.
ALso, I have not seen any discussion around
"boolean-function-expressions
as predicates" on SQM-15…
I’ll add some comments on that issue.
Great, thanks...