When a search is executed on an application with a number field that returns hits with documents with nothing entered in a number field, either a 0 or a -1 appears in the field. When an application containing documents is modified to have a number field, the search returns -1 for those documents. When a document is uploaded and the number field is left blank, the search returns 0. If a search is executed with the number field as a condition, they are treated as empty fields and when viewed in Oracle Content Server, the fields are empty.
The null number field issue is a result of Oracle Content Server functionality.