? CAST(DATE() AS I) && Expected the number of days 
                    && from one given conventional date ( {^1900/1/1} is good )
*that is
? CAST(DATE() AS I)=(DATE() - {^1900/1/1}) && expected true
? CAST(DATETIME() AS B(0)) && Expected the number of seconds 
                           && from one given conventional datetime ( {^1900/1/1:} )
*that is
? CAST(DATETIME() AS B(0))=(DATETIME() - {^1900/1/1:}) && expected true