The EXTFNAPIV4_DESCRIBE_PARM_CAN_BE_NULL attribute returns whether or not the parameter is null. Using this attribute in a describe_parameter_set scenario returns an error.
a_sql_byte
True, if the value of a parameter can be NULL at the time of execution. For a table parameter or parameter 0, the value is false.
This is a read-only property.
This is a read-only property, so all attempts to set result in an EXTFNAPIV4_DESCRIBE_INVALID_ATTRIBUTE error.
Not applicable.