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Trigger Programs

DEFINE, MAINTAIN, PROPERTY, SET (=) UPDATE, and AW commands are recognized by Oracle OLAP as events that can trigger the execution of OLAP DML programs.

Trigger programs are frequently written to maintain application-specific metadata. Trigger programs have certain characteristics depending on the statement that triggers them. Some trigger programs execute before the triggering statement executes; some after. Oracle OLAP passes arguments to programs triggered by some statements, but not others. Oracle OLAP does not change dimension status before most trigger programs execute, but does change dimension status before some MAINTAIN statements trigger program execution. In most cases, you can give a trigger program any name that you choose, but some events require a program with a specific name. "Characteristics of Object Trigger Programs" discusses these characteristics.


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