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From "John Hurst" <john.b.hu...@gmail.com>
Subject Re: declarative - db schema
Date Sun, 12 Mar 2006 20:23:44 GMT
I've seen this discussed a couple of times here.

We have a scenario, or usage pattern, with Oracle that would benefit from
iBATIS somehow being able to specify a schema name as a parameter/property.

If we have an application XXX, we commonly use several schemas/users:

  XXXOWNER creates and owns the objects
  XXXUSER is used by application servers to query and update objects
  XXXREADER is used for read-only access, for example by users running

The idea is that only XXXOWNER has DDL privileges; so XXXUSER capabilities
are limited. Perhaps this is not terribly useful as a security feature

But, we do find it kind of nice for separation of duties -- the DBA team are
responsible for all DDL in production, and they have the XXXOWNER
schema/password. The development/support team deploy applications on to
application servers, including configuration of DataSources, and they have
the XXXUSER schema/password.

We use a bit of Hibernate and a bit of iBATIS. Hibernate does allow you to
configure the schema as a property. iBATIS doesn't. Our current solution
with iBATIS is to define PUBLIC SYNONYMs for XXXOWNER objects, so they can
be accessed from other schemas without qualification. I would prefer to
qualify them as we do with Hibernate.

But, I'm not sure how this would work with iBATIS. I certainly don't want to
change or break the way parameters are currently provided to statements --
and I don't want to put the schema as a property into my beans!

Food for thought I guess ...


John Hurst
Wellington, New Zealand

On 3/12/06, Larry Meadors <lmeadors@apache.org> wrote:
> No, there really isn't anything like this in iBATIS, because we try
> (as much as possible) to not mess with the SQL that you write.
> What database are you using?
> Many allow you to specify a default schema on the connection string,
> or connect as the schema owner.
> Larry
> On 3/11/06, Gianluca Gaiotto <gianluca.gaiotto@gmail.com> wrote:
> > Ciao,
> > can I specify the database schema in sqlMap, or elsewhere, but in a
> > declarative way (without hard-coding it)?
> > The problem is that we have several environments stages (dev,
> > integration, test, production) , and therefore I have to configure the
> > right schema for each environment... And I don't want to add the schema
> > name prefix in front of each table name, but configuring a default db
> > schema somewhere in an iBatis config file (and to have several config
> > files, one for each environments).
> >
> > Thanks
> > -Gianluca
> >
> >
> >

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