Re: quick question about PreparedStatements

From: Barry Lind <blind(at)xythos(dot)com>
To: Felipe Schnack <felipes(at)ritterdosreis(dot)br>
Cc: Paul Thomas <paul(at)tmsl(dot)demon(dot)co(dot)uk>, "pgsql-jdbc (at) postgresql (dot) org" <pgsql-jdbc(at)postgresql(dot)org>
Subject: Re: quick question about PreparedStatements
Date: 2003-08-07 18:10:05
Message-ID: 3F3295FD.5040204@xythos.com
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-jdbc

Felipe,

Sort of both. If you are not using cursors then the limitation is in
the driver, if you are using cursors or future use of the v3 fe/be
protocol then the limitation is on the server.

thanks,
--Barry

Felipe Schnack wrote:
> Hm... ok, but (just curious) this is a backend or driver limitation?
>
> On Wed, 06 Aug 2003 19:57:37 -0700
> Barry Lind <blind(at)xythos(dot)com> wrote:
>
>
>>Yes you can only have one active result set per statement.
>>
>>--Barry
>>
>>Felipe Schnack wrote:
>>
>>> I don't know, maybe I just don't understand something about Prep. Statements, but why they have a reference to a ResultSet it has created? To me make more sense the opposite, the ResultSets reference the Statement...
>>> Anyone can confirm I can only have one resultset per statement?
>>>
>>>On Fri, 25 Jul 2003 09:06:58 +0100
>>>Paul Thomas <paul(at)tmsl(dot)demon(dot)co(dot)uk> wrote:
>>>
>>>
>>>
>>>>On 24/07/2003 19:55 Felipe Schnack wrote:
>>>>
>>>>
>>>>> Can I use a single PreparedStatement to create various ResultSets and
>>>>>get data from all of them at the same time?
>>>>
>>>>I don't think so. The Javadoc for Statement says:
>>>>
>>>>"By default, only one ResultSet object per Statement object can be open at
>>>>the same time"
>>>>
>>>>To me, this suggests that some db's may allow multiple ResultSets per
>>>>Statement but that such extensions would be non-portable. Looking at the
>>>>source for AbstactJdbc1Statement, it has
>>>>
>>>>protected java.sql.ResultSet result = null;
>>>>
>>>>So it looks like PG has the one ResultSet to one Statement implementation.
>>>>
>>>>HTH
>>>>
>>>>--
>>>>Paul Thomas
>>>>+------------------------------+---------------------------------------------+
>>>>| Thomas Micro Systems Limited | Software Solutions for the Smaller
>>>>Business |
>>>>| Computer Consultants |
>>>>http://www.thomas-micro-systems-ltd.co.uk |
>>>>+------------------------------+---------------------------------------------+
>>>>
>>>>---------------------------(end of broadcast)---------------------------
>>>>TIP 3: if posting/reading through Usenet, please send an appropriate
>>>> subscribe-nomail command to majordomo(at)postgresql(dot)org so that your
>>>> message can get through to the mailing list cleanly
>>>
>>>
>>>
>>
>
>
>
> /~\ The ASCII Felipe Schnack (felipes(at)ritterdosreis(dot)br)
> \ / Ribbon Campaign Analista de Sistemas
> X Against HTML Cel.: 51-91287530
> / \ Email! Linux Counter #281893
>
> Centro Universitário Ritter dos Reis
> http://www.ritterdosreis.br
> ritter(at)ritterdosreis(dot)br
> Fone: 51-32303341
>

In response to

Browse pgsql-jdbc by date

  From Date Subject
Next Message a_research2 2003-08-07 18:23:18 Best Buy Award, 2002
Previous Message Felipe Schnack 2003-08-07 18:01:16 Re: quick question about PreparedStatements