Re: Continuing problems with using OIDs via JDBC

Nick,

Thanks for the quick response. No joy, though -- I get the same oidin error
with this driver.

Sridhar

--- Nick Fankhauser <nickf(at)ontko(dot)com> wrote:
> Sridhar-
>
> There is a newer driver than the two you listed. Try:
>
> http://jdbc.postgresql.org/download/jdbc7.2dev-1.2.jar
>
> Although listed as development, this is pretty stable and will work with
> postgresql 7.1.
>
> I haven't tried using it for large objects, so I can't say for sure it
> will
> help, but it's worth trying while you wait for other responses from the
> list.
>
> -Nick
>
>
--------------------------------------------------------------------------
> Nick Fankhauser nickf(at)ontko(dot)com Phone 1.765.935.4283 Fax
> 1.765.962.9788
> Ray Ontko & Co. Software Consulting Services
> http://www.ontko.com/
>
> > -----Original Message-----
> > From: pgsql-jdbc-owner(at)postgresql(dot)org
> > [mailto:pgsql-jdbc-owner(at)postgresql(dot)org]On Behalf Of M. A. Sridhar
> > Sent: Saturday, January 26, 2002 5:05 PM
> > To: pgsql-jdbc(at)postgresql(dot)org
> > Subject: [JDBC] Continuing problems with using OIDs via JDBC
> >
> >
> > Hello folks,
> >
> > I would greatly appreciate some help with using large objects in
> > PostgreSQL
> > via JDBC. I need to create a JDBC-compliant database application tha
> > supports multiple database vendors, so using any PostgreSQL-specific
> > extensions is difficult. I am trying to replace my current
> Oracle-on-Linux
> > setup with PostgreSQL, and not having much luck.
> >
> > My setup is Red Hat Linux 7.1 (or 7.2) running the IBM JDK 1.3. I have
> > installed the PostgreSQL version distributed via the stock Red
> > Hat RPMs for
> > that OS version.
> >
> > Also, I am a relative newbie to PostgreSQL, although I have worked with
> > other databases (Oracle and Pointbase in particular). So please
> > forgive any
> > errors/omissions on my part.
> >
> > I need to store and retrieve large binary objects. To this end, I have
> > followed the directions in the JDBC documentation distributed with the
> > PostgreSQL package. Specifically I use the oid data type wherever a
> large
> > object is needed, and the ResultSet's setBinaryStream/getBinaryStream
> > methods to store and retrieve data.
> >
> > When I try this setup using the JDBC 7.1-1.2 drivers, the problem that
> > arises is the driver's inability to handle null values:
> >
> > FastPath call returned ERROR: inv_open: large object 0 not found
> >
> > I would expect that, if the value is null, the driver would return null
> > instead of throwing an exception.
> >
> > I found reports of this bug on Google and the PostgreSQL mailing list,
> and
> > the recommendation was to use the newer drivers. Well, that doesn't
> work
> > either: both the 7.1-1.2 and 7.1-1.3 drivers (which I downloaded from
> > jdbc.fastcrypt.com) fail with an error like
> >
> > java.sql.SQLException: ERROR: oidin: error in "..."
> >
> > when I try to insert a record containing a blob.
> >
> > And yes, I do use setAutoCommit to ensure that retrievals/updates
> happen
> > within a transaction, as described in the JDBC documentation.
> >
> > So I am now unable to use PostgreSQL. Any help is greatly appreciated.
> I
> > will be glad to give more details (e.g., source code snippets) to
> clarify
> > if needed.
> >
> > Thanks in advance.
> >
> >
> >
> > =====
> > Sridhar
> > ---
> > M. A. Sridhar
> > m_a_sridhar(at)yahoo(dot)com
> >
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>

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