Re: quick question about PreparedStatements

From: Felipe Schnack <felipes(at)ritterdosreis(dot)br>
To: Barry Lind <blind(at)xythos(dot)com>
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 18:01:16
Message-ID: 20030807150116.166c4a93.felipes@ritterdosreis.br
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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 |
> >>+------------------------------+---------------------------------------------+
> >>
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> >
> >
> >
>
>

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