text: -- [er]retrieve by function of to_char using parameter of blank
  
  
  create class func_04 ( a smallint, b int, c numeric(38,10), d float, e monetary, f double );
  insert into func_04 values ( 0,0,0,0,0,0);
  insert into func_04(a) values ( null);
  insert into func_04 values ( 1,1,1,1,1,1);
  insert into func_04 values ( 127,10000,987654321.123456789,987654321.123,987654321.987,987654321.123);
  insert into func_04 values (-127,-10000,-987654321.123456789,-987654321.123, -987654321.987,-987654321.123);
  
  select to_char()  from func_04;
  
  drop class func_04;