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Re: Index on a COALESCE function

From: Richard Broersma Jr <rabroersma(at)yahoo(dot)com>
To: Mark Steben <msteben(at)autorevenue(dot)com>, pgsql-admin(at)postgresql(dot)org
Subject: Re: Index on a COALESCE function
Date: 2007-07-16 20:12:26
Message-ID: 886237.78443.qm@web31813.mail.mud.yahoo.com (view raw or flat)
Thread:
Lists: pgsql-admin
--- Mark Steben <msteben(at)autorevenue(dot)com> wrote:

>  select 45198705,false,id,next_avail_senddate(id,date(send_date)) from 
>  (select
> id,timeclause_combine(date(estmileage_timeclause(service_date,mileage,last_s
> ervice_date,last_mileage,
>    date_of_purchase,year_purchased,10750,cid,serindex_date,id)),
>    date(date_larger(date(coalesce(date_of_purchase,
> '1900-01-01')+timespan('45 days')),
>    date(service_date+timespan('44 days')))),
>    date(null),date(create_date),9,false) as send_date,last_send

IIUC, indexs are only used in JOINS and WHERE conditions.  I don't see either of those in your
query.

Regards,
Richard Broersma Jr.

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