On Dec 17, 2008, at 6:36 AM, Diez B. Roggisch wrote:

>
> Hi,
>
> we've got some function-based indices we currently create using plain
> text()-calls, like this:
>
> CREATE UNIQUE INDEX
>                users_lower_email_index
>            ON
>                user_db.users (lower(email));
>
> This works, but it would be nice to stay in the SA-world even with  
> these
> indices.
>
> And for schema-evolution purposes, we utilize reflection to compare  
> tables.
> Reflection does not not include indices like the above though. Or I  
> missed
> them?
>
> If not, is there a way to add that to SA, maybe through a plugin?  
> I'd be happy
> to contribute if this is seen as valuable addition, I must add  
> though that
> because we solely use postgres, I won't be able to add support for  
> anything
> beyond that - but maybe others would step up to integrate other  
> engines.

Randall Smith has been working on a schema inspection API which I  
believe seeks to reflect a wider variety of constructs such as  
indexes.   His progress can be seen here:

http://www.sqlalchemy.org/trac/browser/sqlalchemy/branches/reflection

He was pretty active as of three weeks ago but hasn't been around  
lately, I can give you his email address if you want to contact him to  
collaborate further.  Search this mailing list for a discussion about  
the API.

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