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.
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[1] http://www.postgresql.org/docs/8.2/static/functions-aggregate.html#FUNCTIONS-AGGREGATE-STATISTICS-TABLE -- Euler Taveira de Oliveira http://www.timbira.com/ ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend
