adds a string field to the schema . the length is the conceptual length of the field . for example , if the field is defined as varchar 8 , then its length is 8 . concode_field_sep int length concode_elem_sep int type concode_elem_sep Map<String,FieldInfo> info concode_field_sep void add concode_elem_sep void addAll concode_elem_sep void addField concode_elem_sep void addIntField concode_elem_sep int length concode_elem_sep Collection<String> fields concode_elem_sep int type concode_elem_sep boolean hasField