Re: NOT IN and NOT EXIST - Mailing list pgsql-general

From Sameer Kumar
Subject Re: NOT IN and NOT EXIST
Date
Msg-id CADp-Sm6vQnFrNv71516mkOtcUR+_dawkftWkbiW8VOOma1Z-fQ@mail.gmail.com
Whole thread Raw
In response to Re: NOT IN and NOT EXIST  (Vik Fearing <vik.fearing@dalibo.com>)
List pgsql-general

On Sun, Jul 6, 2014 at 7:14 AM, Vik Fearing <vik.fearing@dalibo.com> wrote:
> NOT EXISTS translates to HASH ANTI JOIN and NOT IN translates to NOT
> (HASHED) operation.
>
> Given that the columns used in NOT IN clause (for outer as well as
> inner) are NOT NULL, should not it translate a NOT IN plan similar to
> NOT EXISTS plan?

It will, hopefully in 9.5.

https://commitfest.postgresql.org/action/patch_view?id=1487

​Cool!
Will be looking forward to it! But seems a long way from now...​


Best Regards,

Sameer Kumar | Database Consultant

ASHNIK PTE. LTD.

101 Cecil Street, #11-11 Tong Eng Building, Singapore 069533

M: +65 8110 0350  T: +65 6438 3504 | www.ashnik.com

icons

 

Email patch

 

This email may contain confidential, privileged or copyright material and is solely for the use of the intended recipient(s).

Attachment

pgsql-general by date:

Previous
From: Tom Lane
Date:
Subject: Re: [ADMIN] WARNING: database must be vacuumed within 8439472 transactions
Next
From: Pujol Mathieu
Date:
Subject: Re: conditional IF statements in postgresql