Обсуждение: bytea not recognized by JDBC (7.0.2)

I have a problem with JDBC (postgresql.jar) and Postgres 7.0.2 . The
client is under Windows NT with JDK 1.3, and Postgres is running on
SuSE Linux 6.3 (kernel 2.2.13).

Here is my table :
 create table TRANSACTIONS (   APPLICATION_SOFTWARE_RELEASE   bytea                  not null, );

I insert a row (using JDBC) with success :
 insert into TRANSACTIONS(APPLICATION_SOFTWARE_RELEASE) values('0005');

I select a row (with JDBC) :
 select APPLICATION_SOFTWARE_RELEASE from TRANSACTIONS;
and I get the following error :
 Error while processing order (select APPLICATION_SOFTWARE_RELEASE from TRANSACTIONS ) : No class found for bytea.

How can I select a "bytea" field ?
Is there a workaround for this, or a patch ?
Is this a bug of the JDBC driver (or a not implemented feature) ?

I have looked at the mailing-list but didn't find the answer to my
problem.

Regards,

-- 
Olivier Jeannet - e-Payment solutions I prefer not running 32 bit extensions for a 16 bit patch to an 8 bit operating
systemoriginally coded for a 4 bit microprocessor, written by a 2 bit company, that can't stand 1 bit of competition.
 

-- 
Peter Mount
Enterprise Support Officer, Maidstone Borough Council
Email: petermount@maidstone.gov.uk
WWW: http://www.maidstone.gov.uk
All views expressed within this email are not the views of Maidstone Borough
Council


> -----Original Message-----
> From: Olivier Jeannet [mailto:jeannet@montrouge.tt.slb.com]
> Sent: Tuesday, November 28, 2000 4:42 PM
> To: pgsql-interfaces@postgresql.org
> Subject: [INTERFACES] bytea not recognized by JDBC (7.0.2)

[snip]

> How can I select a "bytea" field ?

getBytes() should work.

> Is this a bug of the JDBC driver (or a not implemented feature) ?

No not quite. getObject() currently doesn't know about bytea, so it's
passing it on to the Serializable code which is then failing.

> I have looked at the mailing-list but didn't find the answer to my
> problem.

Actually I cant remember anyone asking about bytea, which is why it's got
overlooked.

Peter

Peter Mount wrote:

> > How can I select a "bytea" field ?
> 
> getBytes() should work.

Can you be more precise please ?
As I get an error from the JDBC driver doing the select, on what variable
should I use getBytes() ?

> > Is this a bug of the JDBC driver (or a not implemented feature) ?
> 
> No not quite. getObject() currently doesn't know about bytea, so it's
> passing it on to the Serializable code which is then failing.

And what is the solution or work around ?

Regards,

-- 
Olivier Jeannet - e-Payment solutions I prefer not running 32 bit extensions for a 16 bit patch to an 8 bit operating
systemoriginally coded for a 4 bit microprocessor, written by a 2 bit company, that can't stand 1 bit of competition.