Postgres Pro
Downloads
Home   >   mailing lists

Re: slow IN() clause for many cases - Mailing list pgsql-hackers

From Tom Lane
Subject Re: slow IN() clause for many cases
Date
Msg-id 27383.1129094574@sss.pgh.pa.us
Whole thread Raw
In response to Re: slow IN() clause for many cases  ("Ilia Kantor" <ilia@obnovlenie.ru>)
Responses Re: slow IN() clause for many cases
List pgsql-hackers
Tree view 
"Ilia Kantor" <ilia@obnovlenie.ru> writes:
> Bitmap Heap Scan on objects_hier  (cost=60.29..179.57 rows=80 width=600)
> (actual time=0.835..1.115 rows=138 loops=1)

vs

>  Merge Join  (cost=62.33..576.80 rows=1117 width=600) (actual
> time=0.542..2.898 rows=138 loops=1)

Hmm, sure looks from here like the bitmap plan is faster.
        regards, tom lane

pgsql-hackers by date:

Previous
From: "Ilia Kantor"
Date:
Subject: Re: slow IN() clause for many cases
Next
From: "Jonah H. Harris"
Date:
Subject: Re: slow IN() clause for many cases