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Date: Wed, 20 Mar 2019 18:41:45 -0700 (PDT)
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Subject: Re: scylladb.com +php vs gonga.com and what? or just use gnoga with
 scylla?
From: Rabican <gavinschuette@gmail.com>
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Xref: reader01.eternal-september.org comp.lang.ada:55914
Date: 2019-03-20T18:41:45-07:00
List-Id: <comp.lang.ada>

On Thursday, March 14, 2019 at 4:01:53 PM UTC-4, Shark8 wrote:
> On Thursday, March 14, 2019 at 12:10:56 PM UTC-6, Rabican wrote:
> > What do ada gods use for scalable databases?
> >=20
> > scylladb.com looks cool
> >=20
> > I understand ada is fast and maintainable and easy to learn.
>=20
> It is.
> Especially if you know another programming language.
> =20
> > Can it use scylla ? how easily?
>=20
> I don't know if it can; but if it has bindings to C, COBOL, or FORTRAN it=
 can do so *easily* because such foreign-function interfaces are part of th=
e standard. (Annex B is titled "Interface to Other Languages") Annex B also=
 has C++, but my understanding is that there's enough variances in the C++ =
standard that it can depend on which C++ implementation you're trying to in=
terface with. (I haven't used the C++ foreign-interfaces so I cannot give y=
ou a more definite answer WRT C++.)
>=20
> Interfacing with other languages is _VERY_ easy. -- As an example let's s=
ay you've got a banking program in COBOL and you want to use a function whi=
ch takes a USER-ID typed value and adds a currency typed value to it, this =
could be as simple as:
>=20
> Type User_ID is range 0..2**32-1 -- a 32-bit ID, w/ COBOL's layout.
>   with Size =3D> 32, Convention =3D> COBOL;
> Type Currency is delta 0.01 range 0.00..1_000_000_000.00 -- $0 to 1 Billi=
on.
>   with Size =3D> 64, Convention =3D> COBOL;
>  =20
> Procedure Deposit( Account : in out User_ID; Amount : in Currency )
>   with Import, Convention =3D> COBOL, External_Name =3D> "DO-DEPOSIT";
>=20
> > or if there some other data solution for gnoga.com/ada?
> I don't know if Gnoga has an integrated DB solution; if it's small to med=
ium sized you might be able to get away w/o a DB at all and simply use cont=
ainers and streaming for persistence.
> =20
> > Can postgresql if used properly scale?
> Yes.

thx!