Oracle Designer Model, Release 6i
Deletion rules
Deletion rules on ITEM_GROUP reference properties, i.e. rule if referenced element is deleted
| Reference Property | Deletion Rule |
| MODULE_COMPONENT_REFERENCE | Cascade delete, if MODULE_COMPONENT deleted (Owning foreign key) |
| SUBCOMPONENT_REFERENCE | Cascade delete, if SUBCOMPONENT deleted (Owning foreign key) |
| ITEM_GROUP_REFERENCE | Nullify reference, if ITEM_GROUP deleted |
Impact on child element types if ITEM_GROUP is deleted
| Impact on children | Via child reference property |
| Nullify reference on ITEM | ITEM.ITEM_GROUP_REFERENCE |
| Nullify reference on ITEM_GROUP | ITEM_GROUP.ITEM_GROUP_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 PREFERENCE_SET_USAGES | PREFERENCE_SET_USAGE.CIELEMENT_REFERENCE |
| Cascade delete USER_PREFERENCES | USER_PREFERENCE.CIELEMENT_REFERENCE |