ER/Studio - Embarcadero Technologies Product Documentation

USING ER/STUDIO > DEVELOPING THE LOGICAL MODEL
Rolename tab
You can change the rolename of foreign keys to differentiate between child and parent attributes in the event that
overlapping foreign keys exist. To change a rolename, double-click any of the rows to invoke the Foreign Key
dialog. You can also change logical and default column rolenames through the Columns tab of the Table Editor
or by right-clicking the relationship and selecting Edit RoleName.
Attachment Bindings tab
Bind an external piece of information, or attachment to the relationship. You can also remove an attachment from
an object, override an attachment binding’s default value, or change the position of a bound attachment. To
override the value of the attachment you have moved to the Selected Attachments grid, double-click the Value
field of the target attachment. ER/Studio opens the Value Override Editor or a list depending on the attachment
datatype. Attachments are created in the Attachments folder of the Data Dictionary and must be applied to the
relationship before they will display on this tab. For more information, see Attaching External Documents to the
Data Model.
Notes
• You can view the incoming and outgoing relationships of a table by expanding the relevant table node and then
expanding Incoming Relationships or Outgoing Relationships. Expand the relationship node to see the name of
the related table.
• You can change the relationship type, specify cardinality, create verb phrases to describe the relationship, create
a logical business and constraint name, and define triggers by double-clicking the relationship, and then making
your changes in the Relationship Editor.
• You can delete a relationship by right-clicking it in the Data Model Window and then selecting Delete
Relationship.
• You can edit a relationship by right-clicking the relationship in the Data Model Window and then selecting Edit
Relationship for a logical model or Edit Foreign Key for a physical model.
• Changing relationship types causes ER/Studio to re-propagate foreign keys using the following rules:
• When changing from identifying to non-identifying, foreign keys change from primary keys to non-key columns
in the child object.
• When changing from identifying to non-specific, or from non-identifying to non-specific, the foreign keys are
removed from the child object.
• When changing from non-identifying to identifying, the foreign keys change from non-key to primary key
columns or attributes in the child object.
• When changing from non-specific to identifying, the child object inherits the parent object’s primary keys as
primary key columns or attributes.
• When changing from non-specific to non-identifying, the child object inherits the parent table’s primary keys as
non-key columns or attributes.
• You can configure how ER/Studio displays relationships for the selected model by clicking View > Diagram and
Object Display Options Editor > Relationship and then making your changes.
• You cannot edit a View Relationship (see Creating View Relationships).
See Also
Moving Relationship Docking Points
Setting the Relationship Notation
Manipulating Relationship Lines
Overriding Color and Font Settings for a Specific Object
EMBARCADERO TECHNOLOGIES > ER/STUDIO® 8.0.3 USER GUIDE 135