Determines if the last parameter accessed was an SQL NULL value
Since IDMS treats all parameters as INOUT, this is not limited to OUT
parameters as described in the JDBC javadoc for this interface (it was
probably just another typo in the spec anyway).
Converts the double argument to a long using the doubleToLongBits
method in class Double, and then writes that long value to the
underlying output stream as an 8-byte quantity, low byte first.
Converts the float argument to an int using the floatToIntBits
method in class Float, and then writes that int value to the
underlying output stream as a 4-byte quantity, low byte first.