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2016-12-23 3c9d398484 a377c8d921 a15c59d196 090a3870aa Doc: improve index entry for "median".
* Median missing from aggregate functions page
@ 2016-12-23 10:20 steven.winfield@cantabcapital.com
0 siblings, 1 reply; 2+ messages in thread
From: steven.winfield@cantabcapital.com @ 2016-12-23 10:20 UTC (permalink / raw)
To: pgsql-docs
The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/9.6/static/functions-aggregate.html
Description:
The index contains an entry for "median" on the aggregate functions page,
but there is no mention of it there.
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* Re: Median missing from aggregate functions page
@ 2016-12-23 15:21 Tom Lane <tgl@sss.pgh.pa.us>
parent: steven.winfield@cantabcapital.com
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From: Tom Lane @ 2016-12-23 15:21 UTC (permalink / raw)
To: steven.winfield@cantabcapital.com; +Cc: pgsql-docs
steven.winfield@cantabcapital.com writes:
> The index contains an entry for "median" 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
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