How does Oracle date compare size analyses

 
-- Created on 2010/04/17 by NAN 
declare 
-- Local variables here 
i integer; 
v_date1 DATE; 
v_date2 DATE; 
begin 
-- Test statements here 
v_date1 := SYSDATE; 
v_date2 := to_date( '2008-09-08'); 
IF v_date1 > v_date2 THEN 
dbms_output.put_line( 'if'); 
ELSE 
dbms_output.put_line( 'else'); 
END IF; 
end;