Oracle Designer Model, Release 6i
Deletion rules
Deletion rules on SNAPSHOT_IMPLEMENTATION reference properties, i.e. rule if referenced element is deleted
| Reference Property | Deletion Rule |
| STORAGE_DEFINITION_REFERENCE | Block attempt to delete STORAGE_DEFINITION |
| TABLESPACE_REFERENCE | Block attempt to delete TABLESPACE |
| DATABASE_USER_REFERENCE | Cascade delete, if DATABASE_USER deleted (Owning foreign key) |
| SNAPSHOT_DEFINITION_REFERENCE | Cascade delete, if SNAPSHOT_DEFINITION deleted |
| SNAPSHOT_GROUP_REFERENCE | Nullify reference, if SNAPSHOT_REFRESH_GROUP deleted |
Impact on child element types if SNAPSHOT_IMPLEMENTATION is deleted
| Impact on children | Via child reference property |
| Cascade delete BASE_RELATION_LOCATIONS | BASE_RELATION_LOCATION.SNAPSHOT_REFERENCE |
| Cascade delete DATABASE_OBJECT_GRANTS | DATABASE_OBJECT_GRANT.SNAPSHOT_REFERENCE |
| Cascade delete DIAGRAM_ELEMENT_USAGES | DIAGRAM_ELEMENT_USAGE.CIELEMENT_REFERENCE |
| Cascade delete DOCUMENT_ATTACHMENTS | DOCUMENT_ATTACHMENT.ELEMENT_REFERENCE |
| Cascade delete EXTENDED_STRUCTURE_ELEMENTS | EXTENDED_STRUCTURE_ELEMENT.PART_OF_REFERENCE |
| Cascade delete EXTENDED_STRUCTURE_ELEMENTS | EXTENDED_STRUCTURE_ELEMENT.USE_OF_REFERENCE |
| Cascade delete INDEX_STORAGES | INDEX_STORAGE.SNAPSHOT_REFERENCE |
| Cascade delete SERVER_OBJECT_USAGES | SERVER_OBJECT_USAGE.CIELEMENT_REFERENCE |