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function no return

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Mar 17, 2005, 6:02:02 PM3/17/05

I define a function

CREATE OR REPLACE FUNCTION my_function(n varchar) RETURNS void AS $$
DECLARE
...
BEGIN
...
END;
$$ LANGUAGE plpgsql;

It has no return. How can I invoke it? SHould I still use

select my_function('aaa')

Thanks,

autogoor

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