SqlStatement Element for EventClass/IndexSqlSchema (ADF)

Contains a Transact-SQL statement that creates a SQL Server index for the event table.

語法

<EventClasses>
    <EventClass>
        ...
        <IndexSqlSchema>
            <SqlStatement>

Characteristic	Description
Data type	string, between 1 and 100,000 characters in length.
Default value	None.
Occurrence	Optional once or more per IndexSqlSchema element.
Updates	Can be added, deleted, and modified when updating the application.

Relationship	Elements
Parent element	IndexSqlSchema Element for EventClass (ADF)
Child elements	None.

Notification Services automatically creates indexes on the event ID and event batch ID, which improves vacuuming performance.

重要事項：
If you add, delete, or update an indexing SqlStatement element, updating the application deletes and re-creates the event class to which it corresponds. This includes dropping and re-creating the SQL Server tables and indexes used by this event class. Any data existing in the original SQL Server tables is permanently deleted.

The following example shows a SqlStatement element that creates an index on the StockEvents table.

<SqlStatement>
CREATE INDEX StockIndex
ON StockEvents (StockSymbol);
</SqlStatement>