Re: Functional indices with const params. - Mailing list pgsql-general

From Tom Lane
Subject Re: Functional indices with const params.
Date
Msg-id 8064.965315276@sss.pgh.pa.us
Whole thread Raw
In response to Functional indices with const params.  (Denis Perchine <dyp@perchine.com>)
List pgsql-general
Denis Perchine <dyp@perchine.com> writes:
> is it possible to create functional indices with constant params?

> create index ix_s_m on stats(date_part('month', sent_date));

No.

> If it is not possible is there any workarounds for this?

Sure: make your own function that does what you want with no extra
parameters.  I don't think an SQL function works as an index function
right now (I may be able to fix that for 7.1, but no promises), but a
plpgsql (or pl-anything) function should work.

            regards, tom lane

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