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Re: JDBC driver with JPA handling identities incorrectly

From: Oliver Jowett <oliver(at)opencloud(dot)com>
To: Stephen Nelson <stephen(at)eccostudio(dot)com>
Cc: pgsql-jdbc(at)postgresql(dot)org
Subject: Re: JDBC driver with JPA handling identities incorrectly
Date: 2009-08-27 14:04:27
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-jdbc
Stephen Nelson wrote:
> Hi,
> I created a thread for this at 
> which details the full environment and code I was attempting to run.
> Briefly my environment is:
> PostgreSQL 8.3
> JDBC Driver postgresql-8.4-701.jdbc4
> This resulted in an error when using a JPA generation type of IDENTITY 
> in a single table inheritance hierarchy. The discriminator was a String 
> but was trying to be parsed as a long by the framework. For demo 
> purposes when using a String that was a parseable value e.g. 123 the 
> error did not occur but the framework believed the discriminator value 
> was the primary key. 
> I switched the JDBC driver to postgresql-8.3-605.jdbc4.jar and the 
> problem doesn't seem to occur.
> I'm running Java 6 so believed the latest driver to be the correct one 
> even though I'm not running the 8.4 server.
> Please let me know if you need any further information or if I can 
> assist in fixing the issue.

Hard to say what is happening here without knowing what JDBC calls your 
JPA layer actually makes.

Do you have a plain JDBC testcase that shows the problem?


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