PL/Perl

Hi!

Could I use "use", "require" functions in plperl?

for example,

CREATE OR REPLACE FUNCTION perl_func (text)
RETURNS real
AS '
  use HTTP::Request;
  use HTTP::Headers;
  ....
  return $value;
'
LANGUAGE 'plperl';


with me it doesn't work and returns error message
"Query failed: ERROR: creation of function failed: 'require' trapped by
operation mask at (eval 2) line 2. in ..."

Thanx