Hi John,
C-JDBC does support simple stored procedures calls, but we are
wondering about control of these calls...
For example, in a heterogeneous cluster of database, do you want to
force each database to implement all of the functions ?
If a call to a store procedure fails, how do you detect it ?
If a call get multiple different return values or out parameters, how
to you react ?
Which return value do you keep ? How do you verify synchronization of
the different backends of the cluster ?
I'd be interest in putting those features in C-JDBC for a cluster of
postgresql backends since they have de facto large support for store
procedures.
For homogenous clusters, this is a short term plan, so maybe we can
work something together with your solution ?
Nicolas Modrzyk.
On Thursday, January 22, 2004, at 10:41 AM, John Sidney-Woollett wrote:
> C-JDBC is a really interesting idea! I have has a look at it in the
> past,
> and stopped when I discovered that the cluster cannot support functions
> that return results eg
>
> {? = call <procedure-name>[<arg1>,<arg2>, ...]}
>
> Is this restriction still in place? We use functions a lot, and it is a
> show stopper for us.
>
> In fact, it is what is driving us to use an alternate replication
> system,
> since we want our db replicated.
>
> Thanks for any info.
>
> John Sidney-Woollett
>
> Nicolas Modrzyk said:
>> Hi,
>>
>> Since we're implementing transparent connection pooling in C-JDBC, you
>> can run C-JDBC on top of the Postgresql driver
>> and you'll be able to recover your connection without starting
>> stopping
>> application.
>> And since, C-JDBC is basically a cluster, you can replicate your
>> Postgresql database on multiple backends, and when the
>> time of backing up has come, only one of your database backend will be
>> offline during the process, the other ones will still be available.
>>
>> Maybe you should have a look ...
>>
>>
>> Nicolas,
>>
>>
>> ---
>> Nicolas Modrzyk
>> Software Engineer INRIA Rhone-Alpes
>> C-JDBC http://c-jdbc.objectweb.org
>>
>
>
>