In a COBOL FD, FILLER data items are placeholders. FILLER items are not uniquely named and thus cannot be uniquely referenced. For this reason, they are not placed into the XFD. The XFD maintains the correct mapping of the other fields, and no COBOL record positional information is lost.
If your ODBC or JDBC application needs to refer to information contained in a FILLER data item, you may need to include it. In such a case, you could include it under a USE GROUP directive, or give it a name of its own with the NAME directive.