Re: wip: functions median and percentile

Josh Berkus <josh@agliodbs.com>

From: Josh Berkus <josh@agliodbs.com>

To: Greg Stark <gsstark@mit.edu>

Cc: Tom Lane <tgl@sss.pgh.pa.us>, Dean Rasheed <dean.a.rasheed@gmail.com>, Hitoshi Harada <umi.tanuki@gmail.com>, Robert Haas <robertmhaas@gmail.com>, Pavel Stehule <pavel.stehule@gmail.com>, David Fetter <david@fetter.org>, PostgreSQL Hackers <pgsql-hackers@postgresql.org>

Date: 2010-10-11T18:30:39Z

Lists: pgsql-hackers

> Uhmm, then why don't we implement that? We could provide median() as a
> short-cut but percentile_cont() doesn't sound much harder to implement
> than median() and more general.

I could really use percentile_cont(0.9), actually, for query
response-time analysis.

-- 
                                  -- Josh Berkus
                                     PostgreSQL Experts Inc.
                                     http://www.pgexperts.com