How to tune function plpgsql

[Dany De Bontridder <dany@xxxxxxxxxxxxx>]

Hi,

Recently, I've decided to simplify the code of an application, to do that, I 
migrate complex part to plpgsql function. I'd like to tune those functions, 
how can I do that ? How can I get the executed SQL inside a function ??


Thanks in advance,

D.