pg.ddx.io pgsql-sql@postgresql.org mailing list archive
help / color / mirror / Atom feedNeed help on a troublesome query plan
4+ messages / 2 participants
[nested] [flat]
* Need help on a troublesome query plan
@ 2002-07-16 17:24 Alain Lavigne <alavigne@zaq.com>
0 siblings, 1 reply; 4+ messages in thread
From: Alain Lavigne @ 2002-07-16 17:24 UTC (permalink / raw)
To: pgsql-sql
On PostgreSQL Version 7.2.1 on Redhat Linux 7.1
Table bld_tb_bus_fact definition
================================
Column | Type | Modifiers
-----------------+-------------------------- +-----------
bus_fact_id | bigint | not null
bus_fact_ts | timestamp with time zone | not null
party_id | bigint |
svc_id | bigint | not null
bus_fact_data | text | not null
bus_fact_typ_cd | character(10) | not null
bus_fact_kywrd | character varying(300) |
cont_id | bigint |
perfby_id | bigint |
Index "bld_x1_tb_bus_fact"
Column | Type
-----------------+---------------
party_id | bigint
bus_fact_typ_cd | character(10)
cont_id | bigint
btree
With the following query on 50000 records:
explain
SELECT bld_TB_BUS_FACT.BUS_FACT_ID AS id
FROM bld_TB_BUS_FACT
WHERE bld_TB_BUS_FACT.PARTY_ID=1320677
AND bld_TB_BUS_FACT.BUS_FACT_TYP_CD='MSG_SENT'
AND bld_TB_BUS_FACT.CONT_ID=786448
AND bld_TB_BUS_FACT.BUS_FACT_KYWRD ILIKE '%MT-ID=3407979%'
AND bld_TB_BUS_FACT.BUS_FACT_KYWRD ILIKE '%S-ID=1310723%'
limit 1;
psql:test.sql:9: NOTICE: QUERY PLAN:
Limit (cost=0.00..2264.16 rows=1 width=8)
-> Seq Scan on bld_tb_bus_fact (cost=0.00..2264.16 rows=1 width=8)
EXPLAIN
I don't understand why it's not using the defined index, even after performing VACUUM FULL ANALYZE on the table.
I tried disabling seqscan but that didn't change anything.
I'm open to suggestions anyone
Thanks!
----------------------------------------------------------------------------------------
Alain Lavigne - Data Administrator - ZAQ Interactive Solutions E-Mail: alavigne@zaq.com
297 St-Paul, West - Montreal, Quebec, Canada - H2Y 2A5
Phone: 514-282-7073 ext: 371 - Fax: 514-282-8011
^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: Need help on a troublesome query plan
@ 2002-07-16 18:52 Stephan Szabo <sszabo@megazone23.bigpanda.com>
parent: Alain Lavigne <alavigne@zaq.com>
0 siblings, 0 replies; 4+ messages in thread
From: Stephan Szabo @ 2002-07-16 18:52 UTC (permalink / raw)
To: Alain Lavigne <alavigne@zaq.com>; +Cc: pgsql-sql
On Tue, 16 Jul 2002, Alain Lavigne wrote:
> Index "bld_x1_tb_bus_fact"
> Column | Type
> -----------------+---------------
> party_id | bigint
> bus_fact_typ_cd | character(10)
> cont_id | bigint
> btree
>
> With the following query on 50000 records:
>
> explain
> SELECT bld_TB_BUS_FACT.BUS_FACT_ID AS id
> FROM bld_TB_BUS_FACT
> WHERE bld_TB_BUS_FACT.PARTY_ID=1320677
> AND bld_TB_BUS_FACT.BUS_FACT_TYP_CD='MSG_SENT'
> AND bld_TB_BUS_FACT.CONT_ID=786448
> AND bld_TB_BUS_FACT.BUS_FACT_KYWRD ILIKE '%MT-ID=3407979%'
> AND bld_TB_BUS_FACT.BUS_FACT_KYWRD ILIKE '%S-ID=1310723%'
> limit 1;
You'll need to either single quote or explicitly cast the
constants you're comparing to the bigint columns.
^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: Need help on a troublesome query plan
@ 2002-07-16 19:02 Alain Lavigne <alavigne@zaq.com>
0 siblings, 1 reply; 4+ messages in thread
From: Alain Lavigne @ 2002-07-16 19:02 UTC (permalink / raw)
To: Stephan Szabo <sszabo@megazone23.bigpanda.com>; +Cc: pgsql-sql
Thanks that worked, but why does that happen or maybe you could point to the proper thread so I read up on it.
----------------------------------------------------------------------------------------
Alain Lavigne - Data Administrator - ZAQ Interactive Solutions E-Mail: alavigne@zaq.com
297 St-Paul, West - Montreal, Quebec, Canada - H2Y 2A5
Phone: 514-282-7073 ext: 371 - Fax: 514-282-8011
-----Original Message-----
From: Stephan Szabo [mailto:sszabo@megazone23.bigpanda.com]
Sent: July 16, 2002 14:52
To: Alain Lavigne
Cc: pgsql-sql@postgresql.org
Subject: Re: [SQL] Need help on a troublesome query plan
On Tue, 16 Jul 2002, Alain Lavigne wrote:
> Index "bld_x1_tb_bus_fact"
> Column | Type
> -----------------+---------------
> party_id | bigint
> bus_fact_typ_cd | character(10)
> cont_id | bigint
> btree
>
> With the following query on 50000 records:
>
> explain
> SELECT bld_TB_BUS_FACT.BUS_FACT_ID AS id
> FROM bld_TB_BUS_FACT
> WHERE bld_TB_BUS_FACT.PARTY_ID=1320677
> AND bld_TB_BUS_FACT.BUS_FACT_TYP_CD='MSG_SENT'
> AND bld_TB_BUS_FACT.CONT_ID=786448
> AND bld_TB_BUS_FACT.BUS_FACT_KYWRD ILIKE '%MT-ID=3407979%'
> AND bld_TB_BUS_FACT.BUS_FACT_KYWRD ILIKE '%S-ID=1310723%'
> limit 1;
You'll need to either single quote or explicitly cast the
constants you're comparing to the bigint columns.
^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: Need help on a troublesome query plan
@ 2002-07-16 20:31 Stephan Szabo <sszabo@megazone23.bigpanda.com>
parent: Alain Lavigne <alavigne@zaq.com>
0 siblings, 0 replies; 4+ messages in thread
From: Stephan Szabo @ 2002-07-16 20:31 UTC (permalink / raw)
To: Alain Lavigne <alavigne@zaq.com>; +Cc: pgsql-sql
On Tue, 16 Jul 2002, Alain Lavigne wrote:
> Thanks that worked, but why does that happen or maybe you could point
> to the proper thread so I read up on it.
It's an issue that the numeric constant gets cast to int4 somewhat
prematurely. I don't have a pointer to a thread off hand, but if you
search the archives you should find a couple.
^ permalink raw reply [nested|flat] 4+ messages in thread
end of thread, other threads:[~2002-07-16 20:31 UTC | newest]
Thread overview: 4+ messages (download: mbox mbox.gz follow: Atom feed)
-- links below jump to the message on this page --
2002-07-16 17:24 Need help on a troublesome query plan Alain Lavigne <alavigne@zaq.com>
2002-07-16 18:52 ` Stephan Szabo <sszabo@megazone23.bigpanda.com>
2002-07-16 19:02 Re: Need help on a troublesome query plan Alain Lavigne <alavigne@zaq.com>
2002-07-16 20:31 ` Stephan Szabo <sszabo@megazone23.bigpanda.com>
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox