ChronicleRule Element (ADF)

Provides a location for defining one or more Transact-SQL statements that maintain data in event chronicle tables.

Синтаксис

<EventClasses>
    <EventClass>
        ...
        <ChronicleRule>

Element Characteristics

Characteristic	Description
Data type and length	None.
Default value	None.
Occurrence	Optional once per EventClass element. (See Remarks.)
Updates	Can be added and deleted when updating the application.

Element Relationships

Relationship	Elements
Parent element	EventClass Element (ADF)
Child elements	RuleName Element for ChronicleRule (ADF) Action Element for ChronicleRule (ADF) ActionTimeout Element for ChronicleRule (ADF)

Замечания

If you are using event chronicle tables, you must define a chronicle rule. The chronicle rule contains the Transact-SQL queries that manipulate the data in the event chronicle tables.

Пример

The following example shows a ChronicleRule element for creating an event chronicle rule named StockEventChronRule. This rule first inserts new stock data into the chronicle table, and then updates existing stock records in the chronicle table. The ActionTimeout value of P0DT00H05M00S gives the rule five minutes to complete successfully.

<ChronicleRule>
    <RuleName>StockEventChronRule</RuleName>
        <Action>
        -- Insert New Stock Symbols with Prices
        INSERT dbo.StockEventsChron (StockSymbol, StockPrice)
        SELECT e.StockSymbol, e.StockPrice
            FROM dbo.StockEvents AS e
            WHERE e.StockSymbol NOT IN 
                (SELECT StockSymbol FROM dbo.StockEventsChron);
        -- Update Existing Stock Symbols with New Prices
        UPDATE dbo.StockEventsChron
            SET StockPrice = e.StockPrice
            FROM dbo.StockEvents AS e 
            JOIN dbo.StockEventsChron AS c
                ON e.StockSymbol = c.StockSymbol
                WHERE e.StockPrice &gt; c.StockPrice;
        </Action>
    <ActionTimeout>P0DT00H05M00S</ActionTimeout>
</ChronicleRule>

См. также

Справочник

Application Definition File Reference

Другие ресурсы

Определение хроники для класса событий
Определение правил хроники событий
Обновление экземпляров и приложений

Справка и поддержка

Получение помощи по SQL Server 2005