Specifies whether null character data is to be inserted as null values, or blanks. The correct syntax is:
INS_NULL = { Y | N | NULLABLE };
If INS_NULL is set to NULLABLE, the null character data is imported as a NULL if the field is defined to allow null values, and as a space if the field is defined as NOT NULL.
If INS_NULL is set to N, then empty character fields are imported as a space.
If INS_NULL is set to Y (default), then a null character value is imported as a NULL. If the field is defined as NOT NULL, an error is returned if a null value is encountered.
INS_NULL is an optional Batch Import command.
For example:
INS_NULL = N;
will import null characters as spaces.