On Wed, 16 Mar 2005 22:19:13 -0500, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>calculate the correlation explicitly for each index
May be it's time to revisit an old proposal that has failed to catch
anybody's attention during the 7.4 beta period:
http://archives.postgresql.org/pgsql-hackers/2003-08/msg00937.php
I'm not sure I'd store index correlation in a separate table today.
You've invented something better for functional index statistics, AFAIR.
Servus
Manfred