Re: [SQL] Sequential scan where Index scan expected.

2006-03-04 Thread Nikolay Samokhvalov
please, show '\d xx_thing_event' too :-)

On 3/3/06, Bryce Nesbitt <[EMAIL PROTECTED]> wrote:
> I'm getting sequential scans (and poor performance), on scans using my
> primary keys.
> Can anyone help figure out why?
>
> demo=# \d xx_thing
>  Table "public.xx_thing"
>  Column  |Type | Modifiers
> -+-+---
>  thing_id  | bigint  | not null
> thing_model   | character varying(128)  |
>  thing_color   | character varying(128)  |
>  thing_year| integer |
> Indexes:
> "xx_thing_pkey" primary key, btree (thing_id)
>
>
> demo=# analyze verbose xx_thing_event;
> INFO:  analyzing "public.xx_thing_event"
> INFO:  "xx_thing_event": 3374 pages, 3000 rows sampled, 197478 estimated
> total rows
>
>
> demo=# explain update xx_thing_event set thing_color='foo' where
> thing_event_id=1;
>  QUERY PLAN
> -
>  Seq Scan on xx_thing_event  (cost=0.00..5842.48 rows=1 width=110)
>Filter: (thing_event_id = 1)
> (2 rows)
>
>
>
> ---(end of broadcast)---
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>


--
Best regards,
Nikolay

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2006-03-04 Thread Peter Ivarsson