Chronicles Element for EventClass (ADF)
Provides a location for defining one or more Transact-SQL statements that determine the table structure for the chronicle tables used by the event class.
Syntax
<EventClasses>
<EventClass>
...
<Chronicles>
Element Characteristics
| Characteristic | Description |
|---|---|
Data type |
None. |
Default value |
None. |
Occurrence |
Optional once per EventClass element. |
Updates |
Can be added and deleted when updating the application. |
Element Relationships
| Relationship | Elements |
|---|---|
Parent element |
|
Child elements |
Remarks
Event chronicles are optional; use the Chronicles element and its child elements only if you need to maintain event information outside of the event tables used by event classes. For more information, see Defining Chronicles for an Event Class.
Important
If you add or delete the Chronicles 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 in the existing event tables is permanently deleted.
Example
The following example shows a Chronicles element (and its child elements) that deletes any existing table named StockEventChron and then creates the StockEventChron event chronicle table. This table consists of the StockSymbol and StockPrice fields.
<Chronicles>
<Chronicle>
<ChronicleName>StockEventChron</ChronicleName>
<SqlSchema>
<SqlStatement>
-- Delete any existing table named StockEventChron
IF EXISTS (SELECT * FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_NAME = 'StockEventChron')
DROP TABLE StockEventChron
</SqlStatement>
<SqlStatement>
-- Create the chronicle table
CREATE TABLE StockEventChron
(
StockSymbol char(10),
StockHighPrice money
PRIMARY KEY (StockSymbol)
)
</SqlStatement>
</SqlSchema>
</Chronicle>
</Chronicles>
See Also
Reference
Application Definition File Reference
Other Resources
Defining Chronicles for an Event Class
Updating Instances and Applications