Re: Implementation of aggregate functions

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

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