Re: Multiple Order By Criteria

I created the index, in order. Did a vacuum analyze on the table and my
explain still says:

Limit (cost=229610.78..229611.03 rows=100 width=717)
-> Sort (cost=229610.78..230132.37 rows=208636 width=717)
Sort Key: receipt, carrier_id, batchnum, encounternum, encounter_id
-> Seq Scan on detail_summary ds (cost=0.00..22647.13 rows=208636
width=717)
Filter: (receipt >= '2004-03-22'::date)

So, for fun I did
set enable_seqscan to off

But that didn't help. For some reason, the sort wants to do a seq scan and
not use my super new index.

Am I doing something wrong ?

----- Original Message -----
From: "Josh Berkus" <josh(at)agliodbs(dot)com>
To: <pgsql-performance(at)postgresql(dot)org>
Cc: <J(at)planeti(dot)biz>
Sent: Tuesday, January 17, 2006 5:25 PM
Subject: Re: [PERFORM] Multiple Order By Criteria

> J,
>
>> I have an index built for each of these columns in my order by clause.
>> This query takes an unacceptable amount of time to execute. Here are the
>> results of the explain:
>
> You need a single index which has all five columns, in order.
>

> --
> --Josh
>
> Josh Berkus
> Aglio Database Solutions
> San Francisco
>
> ---------------------------(end of broadcast)---------------------------
> TIP 1: if posting/reading through Usenet, please send an appropriate
> subscribe-nomail command to majordomo(at)postgresql(dot)org so that your
> message can get through to the mailing list cleanly
>