ASQN (Allow SQL Nulls) attribute
ASQN is a field storage attribute along the lines of SBIN and SREV. It may be specified as either an input or output attribute. A field must have the ASQN attribute to utilize SQL Null functionality.
The ASQN attribute is only available when the partition has been enabled for full RDMLX. Fields using the ASQN attribute are RDMLX fields.
Also See