ComputedFields Element (ADF)

Provides a location for all of the computed notification field definitions for one notification class.

Syntax

<NotificationClasses>
    <NotificationClass>
        ...
        <Schema>
            ...
            <ComputedFields>

Element Characteristics

Characteristic	Description
Data type	None.
Default value	None.
Occurrence	Optional once per /NotificationClass/Schema node.
Updates	Can be added and deleted when updating the application.

Element Relationships

Relationship	Elements
Parent element	Schema Element for NotificationClass (ADF)
Child elements	ComputedField Element (ADF)

Remarks

If you add or delete the ComputedFields element, SQL Server deletes and recreates the corresponding notification class when you update the application. This includes dropping and re-creating the SQL Server tables used by this notification class.

Note

Make sure to back up your application database before updating the application.

Example

The following example shows a populated ComputedFields node. The computed fields, MaxChange and AvgChange, show the maximum growth and the average growth of the stocks in a chronicle table.

<ComputedFields>
    <ComputedField>
        <FieldName>StockPrice</FieldName>
        <SqlExpression>CONVERT(NVARCHAR(10), StockPrice, 1)
        </SqlExpression>
    </ComputedField>
</ComputedFields>

See Also

Reference

Application Definition File Reference

Other Resources

Defining the Notification Schema
Updating Instances and Applications

Help and Information

Getting SQL Server 2005 Assistance