What return type for an insertion function?

> CREATE TRIGGER name { BEFORE | AFTER } { event [OR 
> ...] } ON table FOR EACH { ROW | STATEMENT } 
> EEXECUTE PROCEDURE ( arguments ) 
> you should apparently create a procedure/function much of the same 
> as with: 
> CREATE FUNCTION name ( [ ftype [, ...] ] ) RETURNS rtype 
> AS definition LANGUAGE 'langname' 
> 
> BEGIN/END I think would be restricted to transactions. And therefore 
> would be considered reserved words?
> 
> Just my idea. Haven't used triggers in Pg yet myself. You might see 
> under contributed things / refint (referential integrity) package 
> somewhere, there should be lots of triggers I assume.
> 
> 
> 
> Emils Klotins            e-mail: emils@mail.usis.bkc.lv
> Systems Manager        URL: http://www.usis.bkc.lv/
> USIS Riga                    7 Smilsu Str., Riga LV1050, LATVIA
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OK, but if I execute an SQL query (insertion), there is no return type for the
creation of the function.
Is it possible to create a procedure? 
-----------------------------------------
S�bastien BOUTELOUP
stagiaire � l'UFR DGES
�l�ve ing�nieur 2�me ann�e ENSIMAG

t�l: 04.76.51.49.61