Re: Index Skip Scan - Mailing list pgsql-hackers

From Jesper Pedersen
Subject Re: Index Skip Scan
Date
Msg-id f020c7aa-b6f4-9a30-fcae-1a88cb3bb6f2@redhat.com
Whole thread Raw
In response to Re: Index Skip Scan  (Bhushan Uparkar <bhushan.uparkar@gmail.com>)
List pgsql-hackers
Hi Bhushan,

On 08/16/2018 01:44 AM, Bhushan Uparkar wrote:
> I was reviewing index-skip patch example and have a comment on it.

Thanks for your interest, and feedback on this patch !

> Example query “select distinct b from t1” is equivalent to “select b from t1 group by b”. When I tried the 2nd form >
ofquery it came up with different plan, is it possible that index skip scan can address it as well?
 
> 

Like Thomas commented down-thread my goal is to keep this contribution 
as simple as possible in order to get to something that can be 
committed. Improvements can follow in future CommitFests, which may end 
up in the same release.

However, as stated in my original mail my goal is the simplest form of 
Index Skip Scan (or whatever we call it). I welcome any help with the patch.

Best regards,
  Jesper


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