In general, I do not understand why a PK index should not be used when the query can be satisfied by the index itself. Can anyone give some reason to this?
On Mon, Feb 6, 2017, 6:29 PM Aron Podrigal <aronp@xxxxxxxxxxxxxxxxxx> wrote:
EXPLAIN ANALYZE does not tell me much. It doesn't say why the planner opts for not using the Primary key index.
On Mon, Feb 6, 2017, 6:23 PM Alban Hertroys <haramrae@xxxxxxxxx> wrote:
> On 7 Feb 2017, at 0:16, Podrigal, Aron <aronp@xxxxxxxxxxxxxxxxxx> wrote:
>
> Hi,
>
> I noticed when I do a simple SELECT id FROM mytable WHERE id = 'cb81d070-4213-465f-b32e-b8db43b83a25'::UUID Postgres does not use the primary key index and opts for a Seq Scan.
>
> I of course did VACUUM ANALYZE and I have reset statistics But no sign. Is there any particular thing I should be looking at?
An EXPLAIN ANALYZE would be a good start.
Alban Hertroys
--
If you can't see the forest for the trees,
cut the trees and you'll find there is no forest.
