About Triggers

An event trigger checks for an event and when the event occurs, it runs the code associated with the trigger.

Publisher supports three types:

• Before Data - Fires right before the dataset is executed.

• After Data - Fires right after the data engine executes all datasets and generates the XML.

• Schedule Trigger - Fires when a scheduled job is triggered and before it runs.

Before data and after data triggers execute a PL/SQL function stored in a PL/SQL package in your Oracle Database. The return data type for a PL/SQL function inside the package must be a Boolean type and the function must explicitly return TRUE or FALSE.

A schedule trigger is associated with a scheduled job. It's a SQL query that executes at the time a report job is scheduled to run. If the SQL returns any data, the report job runs. If the SQL query returns no data, the job instance is skipped.

Event triggers accept only one value in a parameter. If you pass multiple values to a schedule event trigger parameter, the status of the scheduled job is set to Skipped.

Event triggers aren't used to populate data used by a bursting definition. See Add Bursting Definitions.