Tigger after delete with plpgsql

[Fellipe Henrique <fellipeh@xxxxxxxxx>]

Hello, I`m try to use this code for my After Delete trigger:

  delete

  from MOVIMENTO

  where (IDEMPRESA = OLD.idempresa) and

        (upper(TABELA) = 'NFENTRADA_ITEM') and

        (CODIGO = OLD.idempresa_item);

But, when execute. show me error.. that`s says

"old is not initialize" (sorry,but I dont know how exactly error msy because in my SO, give in portuguese)..

my question is:  how can I use OLd and NEW in posgre?

Best Regards,

T.·.F.·.A.·.     S+F

Fellipe Henrique P. Soares

"Life is a game without Tutorial"

http://fellipeh.eti.br