Re: constraint with reference to the same table

Victor Yegorov <viy@nordlb.lv>

From: Victor Yegorov <viy@nordlb.lv>
To: Rudi Starcevic <rudi@oasis.net.au>
Cc: Stephan Szabo <sszabo@megazone23.bigpanda.com>, Postgres Performance <pgsql-performance@postgresql.org>
Date: 2003-05-15T02:21:35Z
Lists: pgsql-performance
* Rudi Starcevic <rudi@oasis.net.au> [15.05.2003 05:15]:
> Perhaps I also need a 3rd Index ?
> 
> One for Business's
> One for People and
> One for Business_People.
> 
> I think I may need the 3rd Index for query's like

You don't need it. Primary key on that 2 columns will create a unique index
on them. Of course, if you left things unchanged - you'll need to create
business_people index yourself.

execute:

=> \d business_people

and take a glance on a line, describing primary key.

-- 

Victor Yegorov