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Date: Thu, 14 Mar 2019 13:01:51 -0700 (PDT)
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Subject: Re: scylladb.com +php vs gonga.com and what? or just use gnoga with
 scylla?
From: Shark8 <onewingedshark@gmail.com>
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Xref: reader01.eternal-september.org comp.lang.ada:55871
Date: 2019-03-14T13:01:51-07:00
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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.

It is.
Especially if you know another programming language.
=20
> Can it use scylla ? how easily?

I don't know if it can; but if it has bindings to C, COBOL, or FORTRAN it c=
an do so *easily* because such foreign-function interfaces are part of the =
standard. (Annex B is titled "Interface to Other Languages") Annex B also h=
as C++, but my understanding is that there's enough variances in the C++ st=
andard that it can depend on which C++ implementation you're trying to inte=
rface with. (I haven't used the C++ foreign-interfaces so I cannot give you=
 a more definite answer WRT C++.)

Interfacing with other languages is _VERY_ easy. -- As an example let's say=
 you've got a banking program in COBOL and you want to use a function which=
 takes a USER-ID typed value and adds a currency typed value to it, this co=
uld be as simple as:

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 Billion=
.
  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";

> 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 mediu=
m sized you might be able to get away w/o a DB at all and simply use contai=
ners and streaming for persistence.
=20
> Can postgresql if used properly scale?
Yes.