Re: A Table's Primary Key Listing

On Thu, 18 Aug 2005 09:40:57 -0700 (PDT)
Roger Tannous <roger77_lb(at)yahoo(dot)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;

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