docs: public synchronized BigDecimal getBigDecimal(int parameterIndex,
              int scale) throws SQLException {
  
          if (scale < 0) {
              throw Util.outOfRangeArgument();
          }
  
          // boucherb@users 20020502 - added conversion
          BigDecimal bd = (BigDecimal) getColumnInType(parameterIndex,
              Type.SQL_DECIMAL);
  
          if (bd != null) {
              bd = bd.setScale(scale, BigDecimal.ROUND_DOWN);
          }
  
          return bd;
      }