On Wed, 11 Oct 2006, Bill Eaton wrote:
I just notice that multiple inputs to aggregates are allowed in the upcoming
8.2 release. This gives me a great incentive to play with the beta and
upgrade from 8.0.
One question remains: how about multiple outputs? Can I have a ROW as a
return value -- i.e. something like SLOPE and INTERCEPT in the original
example?
First, you don't have to write these functions by yourself. The functions
for least squares fit are defined in the standart, and they will be also
in 8.2.
http://momjian.us/main/writings/pgsql/sgml/functions-aggregate.html
But, in any way, if you want your aggregate to return several values, you
can always return them as the elements in the array.
Regards,
Sergey
*******************************************************************
Sergey E. Koposov
Max Planck Institute for Astronomy/Sternberg Astronomical Institute
Tel: +49-6221-528-349
Web: http://lnfm1.sai.msu.ru/~math
E-mail: math@xxxxxxxxxx
