Re: Median missing from aggregate functions page

Tom Lane <tgl@sss.pgh.pa.us>

From: Tom Lane <tgl@sss.pgh.pa.us>
To: steven.winfield@cantabcapital.com
Cc: pgsql-docs@postgresql.org
Date: 2016-12-23T15:21:39Z
Lists: pgsql-docs
steven.winfield@cantabcapital.com writes:
> The index contains an entry for &quot;median&quot; on the aggregate functions page,
> but there is no mention of it there.

Hm --- that <indexterm> entry is attached to the percentile_cont()
function, which can be used to implement median, but I agree that
a person who already knew that would probably not be following the
index pointer.

It might be more useful to point to 4.2.7. Aggregate Expressions
which contains a concrete example of how to implement median
with percentile_disc().

Another idea is to just make the index entry say
"See percentile_cont() and percentile_disc()".

			regards, tom lane


Commits

  1. Doc: improve index entry for "median".