Date: Mon, 29 Oct 2007 10:09:38 -0700
From: "Joshua D. Drake" <jd@commandprompt.com>
To: Samantha Atkins <sjatkins@mac.com>
Cc: pgsql-general@postgresql.org
Subject: Re: A few questions
Message-ID: <20071029100938.7f76b015@scratch>
In-Reply-To: <D32C7D7E-6706-42A4-B957-A4019BF1FA35@mac.com>
References: <D32C7D7E-6706-42A4-B957-A4019BF1FA35@mac.com>
Organization: Joshua D. Drake
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On Mon, 29 Oct 2007 09:52:55 -0700
Samantha Atkins <sjatkins@mac.com> wrote:

> First on prepared statements:
>=20
> 1) If I am using the libpq are prepared statements tied to a =20
> connection?=20

Yes.

>  In other words can I prepare the statement once and use =20
> it on multiple connections?

No.

>=20
> 2) What is the logical scope of prepared statement names?  Can I use =20
> the same name on different tables without conflict or is the scope =20
> database wide or something else?

Each prepare must be unique within the session. So session 1 can have
foo and session 2 can have foo, but session 1 can not have foo that
calls to two different objects...=20

>=20
> On indices:
>=20
> 3) same as 2 for index names.  I think they are per table but it is =20
> worth asking.

Indexes are per relation (table)

>=20
> and last:
>=20
> 4) Is it generally better to have more tables in one database from a =20
> memory and performance point of view or divide into more databases
> if there is a logical division.

Uhmm this is more of a normalization and relation theory question :). I

>  The reason I ask is that I have a =20
> situation where one app is used by multiple different users each =20
> running their own copy.

Ahh... use namespaces/schemas:

http://www.postgresql.org/docs/current/static/ddl-schemas.html


> Thanks very much for any enlightenment on these questions.
>=20
> - samantha

Hope this was helpful.

Sincerely,

Joshua D. Drake

>=20
>=20
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>=20


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