Re: array indizes in SQL

On Nov 12, 2007 12:04 PM, Hans-Peter Oeri <hp(at)oeri(dot)ch> wrote:
> SELECT
> CAST(c.conrelid as regclass) AS "you"
> , am.attname AS "mine"
> , ay.attname AS "yours"
> FROM
> generate_series(1,5) as i
> , pg_catalog.pg_attribute as am
> , pg_catalog.pg_attribute as ay
> , pg_catalog.pg_constraint as c
> WHERE
> c.confrelid = CAST(? AS regclass)
> AND am.attrelid = c.confrelid
> AND ay.attrelid = c.conrelid
> AND c.confkey[i] = am.attnum -- position in the respective array
> AND c.conkey[i] = ay.attnum -- must be identical
> ORDER BY
> i ASC

I see. If correct ordering is a requirement, I see no reason to
classify your original query as "unclean". If it works for you, and
it's fast enough, go for it.

Good luck.