Re: Performance on inserts

Bruce Momjian <pgman@candle.pha.pa.us>

From: Bruce Momjian <pgman@candle.pha.pa.us>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Jules Bean <jules@jellybean.co.uk>, Alfred Perlstein <bright@wintelcom.net>, pgsql-hackers@postgresql.org
Date: 2000-10-15T21:51:48Z
Lists: pgsql-hackers
> > * Prevent index lookups (or index entries using partial index) on most
> >   common values; instead use sequential scan 
> 
> This behavior already exists for the most common value, and would
> exist for any additional values that we had stats for.  Don't see
> why you think a separate TODO item is needed.

You mean the optimizer already skips an index lookup for the most common
value, and instead does a sequential scan?  Seems you are way ahead of
me.


-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
  +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026