Relationships and Domains › Domains and Data Modeling › Domains in the Physical Model › Specify a Validation Rule and Default Value for a Teradata Domain

Specify a Validation Rule and Default Value for a Teradata Domain

In Teradata, the Domain Editor is used for viewing and managing domains in the physical model. Use the Constraint tab in the Domain Editor to specify check constraints and default values.

To specify the validation rule and default value for a Teradata domain

1. Click Domains on the Model menu.

   The Domain Editor opens.

2. Click the Constraint tab and work with the following options.

   Check Constraints

   Specifies the validation rule to attach to the selected domain. Select the validation rule that you want from the Validation Rule grid. If the Use Inherited Constraints check box is selected this means that this property is inherited from the parent domain. If you do not want this property to be inherited, simply clear the check box and select a validation rule from the Validation Rule grid. The Check Constraints option contains a toolbar that includes the following options:

   Sort

   Sorts the list of validation rules by alphabetic, reverse alphabetic, or selected order. You select the method you want using the drop-down menu that opens after you click the Sort button. Visual cues are provided for how the validation rule list is currently sorted:

   

   Specifies that the list is sorted in alphabetic order.

   

   Specifies that the list is sorted in reverse alphabetic order.

   

   Specifies that the list is sorted in selected order. This means that the validation rules that are currently selected go to the top of the list.

   

   Opens the Validation Rule Editor so you can view or modify existing validation rules or create a new one.

   Default

   Specifies the default value to attach to the selected domain. Select the default value that you want from the drop-down list. If the Use Inherited Default Value check box is selected this means that this property is inherited from the parent domain. If you do not want this property to be inherited, simply clear the check box and select a default value from the drop-down list. You can also use the drop-down list to open the Default Value Editor to view or modify an existing default value or create a new one.

3. Click Close.

   The validation rule and default value is specified and the Domain Editor closes.

More information:

Specify Teradata Domains in a Physical Model