Retrieves whether null values are allowed in the designated parameter.

Parameters:

param

the first parameter is 1, the second is 2, ...

Returns:  the nullability status of the given parameter; one of ParameterMetaData.parameterNoNulls, ParameterMetaData.parameterNullable, or ParameterMetaData.parameterNullableUnknown

Exceptions:

SQLException

if a database access error occurs

Since:  1.4