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Re: Implementation of aggregate functions

From: sayali k <sayali_s_kulkarni(at)yahoo(dot)co(dot)in>
To: pgsql-patches(at)postgresql(dot)org
Subject: Re: Implementation of aggregate functions
Date: 2007-09-20 16:15:56
Message-ID: 234001.88689.qm@web7612.mail.in.yahoo.com (view raw or flat)
Thread:
Lists: pgsql-patches
Thanks a lot to all of you for helping me on this issue. I will make sure that I post all my mails henceforth on the appropriate mailing list.
   
  Thanks once again for all the help,
   
  Best regards,
  Sayali


Euler Taveira de Oliveira <euler(at)timbira(dot)com> wrote:
  sayali k wrote:

> I am keen in implementing certain additional aggregate
> functions like percentage, standard deviation etc. I
> would like to know the complexity of this and also the
> parts of the code which would have to be modified for
> the same,
> 
This is the wrong list to ask this kind of question. Use pgsql-hackers
instead.
Some statistics functions [1] are already implemented in PostgreSQL.
Samples are in utils/adt/float.c.

[1]
http://www.postgresql.org/docs/8.2/static/functions-aggregate.html#FUNCTIONS-AGGREGATE-STATISTICS-TABLE


-- 
Euler Taveira de Oliveira
http://www.timbira.com/



Best regards,
  Sayali
   
  == ~~~ == ~~~ == ~~~ == ~~~ == ~~~ == ~~~ == 
  The degree of technical competence is 
  inversely proportional to the level of management. 
== ~~~ == ~~~ == ~~~ == ~~~ == ~~~ == ~~~ == 

       
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