hese values
     will probably not work as expected.)  When writing these values
     as constants in an SQL command, you must put quotes around them,
     for example <TT
CLASS="LITERAL"
>UPDATE table SET x = 'Infinity'</TT
>.  On input,
     these strings are recognized in a case-insensitive manner.
    </P
><DIV
CLASS="NOTE"
><BLOCKQUOTE
CLASS="NOTE"
><P
><B
>Note: </B
>      IEEE754 specifies that <TT
CLASS="LITERAL"
>NaN</TT
> should not compare equal
      to any other floating-point value (including 