Action Element for EventRule (ADF)
Provides a Transact-SQL statement that specifies the action to be taken in a subscription event rule.
Синтаксис
<SubscriptionClasses>
<SubscriptionClass>
...
<EventRules>
<EventRule>
...
<Action>
Element Characteristics
| Characteristic | Description |
|---|---|
Data type |
string, between 1 and 100,000 characters in length. |
Default value |
None. |
Occurrence |
Required once per EventRule element. |
Updates |
Can be modified, but not added or deleted, when updating the application. |
Element Relationships
| Relationship | Elements |
|---|---|
Parent element |
|
Child elements |
None. |
Пример
This example shows a populated Action element for an EventRule. The Transact-SQL statements use a notification function to create notifications, and also insert event data into a chronicle table.
<Action>
-- Insert notifications into StockNotifications view
INSERT INTO StockNotifications ( SubscriberId, DeviceName,
SubscriberLocale, StockSymbol, StockPrice )
SELECT S.SubscriberId, S.DeviceName, S.SubscriberLocale,
E.StockSymbol, E.StockPrice
FROM StockSubscriptions S JOIN StockEvents E
ON S.StockSymbol = E.StockSymbol
JOIN StockEventChron C
ON S.StockSymbol = C.StockSymbol
WHERE S.StockTriggerPrice <= E.StockPrice
AND S.StockTriggerPrice > C.StockHighPrice;
-- Update the subscription chronicle
INSERT StockSubscriptionChron (SubscriberId, StockSymbol, StockPrice)
SELECT S.SubscriberId, S.StockSymbol, E.StockPrice
FROM StockSubscriptions S JOIN StockEvents E
ON S.StockSymbol = E.StockSymbol;
</Action>
См. также
Справочник
Application Definition File Reference
Другие ресурсы
Определение правил событий
Определение правил подписок
Обновление экземпляров и приложений