Re: A Table's Primary Key Listing

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От D'Arcy J.M. Cain
Тема Re: A Table's Primary Key Listing
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Msg-id 20050818121844.33a09ad2.darcy@druid.net
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Ответ на A Table's Primary Key Listing  (Roger Tannous <roger77_lb@yahoo.com>)
Ответы Re: A Table's Primary Key Listing  (Roger Tannous <roger77_lb@yahoo.com>)
Список pgsql-sql
On Thu, 18 Aug 2005 07:36:22 -0700 (PDT)
Roger Tannous <roger77_lb@yahoo.com> wrote:
> Is there any means to get a list of the Primary Keys (or simply the
> Primary Key if there's only one :) ) for a given table using an SQL query

Here is what I do in PyGreSQL:

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

-- 
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.


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