On Tue, Mar 11, 2014 at 10:06 PM, Tom Lane <t...@sss.pgh.pa.us> wrote:
> But not sure how to define a unique
> index that allows (joe, db1) to coexist with (joe, db2) but not with
> (joe, 0).

and why you want that restriction? when you login you need to specify
the db, right? if you don't specify the db then is the global 'joe'
that want to login

Jaime Casanova         www.2ndQuadrant.com
Professional PostgreSQL: Soporte 24x7 y capacitaciĆ³n
Phone: +593 4 5107566         Cell: +593 987171157

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