This scalar function takes the Change table name, a field name from the change table, and the _Change-FieldMap column as inputs and returns a single integer value. If the value is 1, it indicates that the field value is changed/set in the bitmap and if the value returned is 0, it indicates the field value is NOT changed/set in the bitmap).
For more information on the above scalar functions, see the SQL Reference section in the Progress OpenEdge Data Management: SQL Reference guide.