Re: multivariate statistics v14

>> I believe this is because reference.sgml is missing a call to
>> &alterStatistic (per report by Alvaro Herrera).
> 
> Ok, I will patch reference.sgml.

Here are some comments on docs.

- There's no docs for pg_mv_statistic (should be added to "49. System
  Catalogs")

- The word "multivariate statistics" or something like that should
  appear in the index.

- There are some explanation how to deal with multivariate statistics
  in "14.1 Using Explain" and "14.2 Statistics used by the Planner"
  section.

I am now looking into the create statistics doc to see if the example
appearing in it is working. I will get back if I find any.

Best regards,
--
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php
Japanese:http://www.sraoss.co.jp