PowerDesigner provides default model checks to verify the validity of keys.
|
Check |
Description and Correction |
|---|---|
|
Key name and code uniqueness |
Key names and codes must be unique in the model. Manual correction: Modify the duplicate name/code Automatic correction: Appends a number to the duplicate name/code |
|
Key code length |
The key code length is limited by the maximum length specified in the DBMS definition (MaxConstLen entry, in the category). Manual correction: Modify the key code length to meet this requirement Automatic correction: Truncates the key code length to the maximum length specified in the DBMS definition |
|
Key column exists |
Each key must have at least one column. Manual correction: Add a column to the key from the Column tab of the key property sheet Automatic correction: Deletes key without column |
|
Key inclusion |
A key cannot include another key (on some columns, regardless of their order). Manual correction: Delete the key that includes an existing key Automatic correction: None |
|
Multi-column key has sequence column |
Since the column initialized by a sequence is already a key, it should not be included in a multi-column key. Manual correction: Detach the sequence from a column that is already part of a multi-column key Automatic correction: None |