PLPGSQL: How can I get the effected rows when use "execute" command in function

Dear all,

Can I get the effected rows after executing sqls in function?
e.g.:

CREATE OR REPLACE FUNCTION execsqls(sqls character varying)
RETURNS integer AS
$BODY$
DECLARE
BEGIN
EXECUTE sqls;
-- TODO-1: I want to know how many records the input sqls
effects?
RETURN effectedRows;
END;
$BODY$
LANGUAGE plpgsql;

test: select execsqls('update mytable where name like ''%abc''')

--
Regards,
*Muiz*