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Re: wip: functions median and percentile

From: Josh Berkus <josh(at)agliodbs(dot)com>
To: Greg Stark <gsstark(at)mit(dot)edu>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com>, Hitoshi Harada <umi(dot)tanuki(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, David Fetter <david(at)fetter(dot)org>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: wip: functions median and percentile
Date: 2010-10-11 18:30:39
Message-ID: 4CB357CF.1060008@agliodbs.com (view raw or flat)
Thread:
Lists: pgsql-hackerspgsql-rrreviewers
> 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

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