EventClass Element (ADF)

Actualizado: 5 de diciembre de 2005

Contains elements that define a single event class.

Sintaxis

<EventClasses>
    <EventClass>

Element Characteristics

Element Relationships

Notas

Importante:
If you delete an EventClass, updating the application deletes the event class to which it corresponds, including all related SQL Server tables and indexes. Any data existing in the original event class tables is permanently deleted.

Ejemplo

The following example shows an EventClass element and its child elements. It defines an event class that provides stock information to a notification application.

<EventClass>
    <EventClassName>StockEvents</EventClassName>
    <Schema>
        <Field>
            <FieldName>StockSymbol</FieldName>
            <FieldType>char(10)</FieldType>
            <FieldTypeMods>not null</FieldTypeMods>
        </Field>
        <Field>
            <FieldName>StockPrice</FieldName>
            <FieldType>money</FieldType>
            <FieldTypeMods>not null</FieldTypeMods>
        </Field>
    </Schema>
    <FileGroup>Primary</FileGroup>
    <IndexSqlSchema>
        <SqlStatement>
        CREATE CLUSTERED INDEX StockIndex
        ON StockEvents (StockSymbol)
        </SqlStatement>
    </IndexSqlSchema>
    <ChronicleRule>
        <RuleName>StockEventChronRule</RuleName>
        <Action>
        INSERT StockEventChron
        (StockSymbol, StockHighPrice)
        SELECT StockEvents.StockSymbol, StockEvents.StockPrice
        FROM StockEvents
        WHERE StockEvents.StockSymbol
        NOT IN (SELECT StockSymbol FROM StockEventChron)
        UPDATE StockEventChron
        SET StockEventChron.StockHighPrice = StockEvents.StockPrice
        FROM StockEvents JOIN StockEventChron
        ON StockEvents.StockSymbol = StockEventChron.StockSymbol 
        WHERE StockEvents.StockPrice &gt; 
            StockEventChron.StockHighPrice
        </Action>
        <ActionTimeout>P0DT00H05M00S</ActionTimeout>
    </ChronicleRule>
    <Chronicles>
        <Chronicle>
            <ChronicleName>StockEventChron</ChronicleName>
            <SqlSchema>
                <SqlStatement>
                IF EXISTS (SELECT * FROM INFORMATION_SCHEMA.TABLES
                WHERE TABLE_NAME = &apos;StockEventChron&apos;)
                DROP TABLE StockEventChron
                </SqlStatement>
                <SqlStatement>
                CREATE TABLE StockEventChron
                (
                StockSymbol char(10),
                StockHighPrice money
                PRIMARY KEY (StockSymbol)
                )
                </SqlStatement>
            </SqlSchema>
        </Chronicle>
    </Chronicles>
</EventClass>

Change History

Vea también

Referencia

Application Definition File Reference

Otros recursos

Definir propiedades principales de clase de evento
Actualizar instancias y aplicaciones

Ayuda e información

Obtener ayuda sobre SQL Server 2005