Specifies that, if necessary, the updated row is to be moved in
the table to a point that preserves the order specified in the sort
information record. A TBSORT must have been performed for this table
before use of this keyword. This keyword is ignored if the table has
never been sorted. If this keyword is omitted, any existing sort information
record is nullified. When a newly repositioned row has sort field-names
equal to the sort field-names of an existing row, the row is inserted
after the existing row.