Date: Thu, 18 Aug 2005 13:55:24 -0400
From: "D'Arcy J.M. Cain" <darcy@druid.net>
To: Roger Tannous <roger77_lb@yahoo.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: A Table's Primary Key Listing
Message-Id: <20050818135524.74852123.darcy@druid.net>
In-Reply-To: <20050818164057.38362.qmail@web51906.mail.yahoo.com>
References: <20050818121844.33a09ad2.darcy@druid.net>
	<20050818164057.38362.qmail@web51906.mail.yahoo.com>
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On Thu, 18 Aug 2005 09:40:57 -0700 (PDT)
Roger Tannous <roger77_lb@yahoo.com> wrote:
> Thanks for your query :)
> 
> But it only shows the first of the primary keys of tables having multiple
> primary keys :)
> 
> This is apparently because of the pg_index.indkey[0] thing, so how can we
> manage this query in order to get all of the keys :)

That's a good question.  The following query does this in a very
unsatisfactory way.  Anyone know what the general solution would be?

SELECT pg_namespace.nspname, pg_class.relname,pg_attribute.attname
  FROM pg_class
JOIN pg_namespace ON pg_namespace.oid=pg_class.relnamespace AND
    pg_namespace.nspname NOT LIKE 'pg_%'
JOIN pg_attribute ON pg_attribute.attrelid=pg_class.oid AND
    pg_attribute.attisdropped='f'
JOIN pg_index ON pg_index.indrelid=pg_class.oid AND
    pg_index.indisprimary='t' AND
    (
      pg_index.indkey[0]=pg_attribute.attnum OR
      pg_index.indkey[1]=pg_attribute.attnum OR
      pg_index.indkey[2]=pg_attribute.attnum OR
      pg_index.indkey[3]=pg_attribute.attnum OR
      pg_index.indkey[4]=pg_attribute.attnum OR
      pg_index.indkey[5]=pg_attribute.attnum OR
      pg_index.indkey[6]=pg_attribute.attnum OR
      pg_index.indkey[7]=pg_attribute.attnum OR
      pg_index.indkey[8]=pg_attribute.attnum OR
      pg_index.indkey[9]=pg_attribute.attnum
    )
ORDER BY pg_namespace.nspname, pg_class.relname,pg_attribute.attname;

-- 
D'Arcy J.M. Cain <darcy@druid.net>         |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.