Hi Tom,
I've got the creation / removal of multiple schema's working, but ddlutils
still wants to remove existing tables from my default schema (public schema in
postgres).
I have a few questions about this:
1) Will it break anything to add the schema to the 'clone' / 'equals'
methods?
2) I see mention of an unused 'catalog' variable in a few places ... what
exactly is this?
2) I noticed a default schema pattern of '%' ... could I use this to filter
for only the schemas mentioned in the schema definition xml? If so could you
maybe provide a quick example (I'm thinking something like "
'my_%','the_schm','%_schm' ")
This has been quite fun to work on so far ... you guys have done a great job.
Thanks for your help,
Ty
----- Original Message ----
From: Thomas Dudziak <[EMAIL PROTECTED]>
To: [email protected]
Sent: Friday, December 7, 2007 1:23:10 AM
Subject: Re: ddl utils schema with existing db
On Dec 6, 2007 2:05 PM, tyju tiui <[EMAIL PROTECTED]> wrote:
> I'm confused about the difference between database and schema
definition in ddlutils.
> If I have an existing database and would like to create a new schema
within that database how would I go about that (via ant or
programmatically)?
>
> For servers like MySQL which don't have a notion of separate schema's
inside a single database I would have to create a new database each
time. For servers like PostgreSQL and Oracle which do support separate
schemas within a single database I shouldn't need to create a new db each
time I need a new schema. Does this make sense?
DdlUtils' support for schemas within the database is weak at the
moment. You can create tables etc. within a specific schema by
prefixing the table names etc. with the schema. E.g.
<database name="test">
<table name="testschema.test">
...
</table>
</database>
For databases like Oracle, you can achieve somethin similar by
accessing the database using a user corresponding to the schema. E.g.
to place something in schema 'testschema', create the schema
indirectly by creating a user of the same name, and then use this user
to connect to the database. Any tables created via an unqualified name
will then be placed in that schema.
This also works for reading the database model from a schema (using
the schema pattern to restrict which schemas to read from).
Tom
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