8. Summary
• Trigger: Implicitly Fires
• Type: Defines the event that fires it
• Prefixes:
– Pre-
– Post
– When
– On
– Key
• Code: Anonymous PL/SQL Block
• Scope: Form, block, or item level
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Notes de l'éditeur
Note:
Events cause the activation, or firing, of certain trigger types.
Note:
The On-Message trigger fires whenever Form Builder displays a message.
Note:
Although you can include SQL statements in a trigger, keep in mind the following
Rules about their use:
INSERT, UPDATE, and DELETE statements must be placed only in
Transactional triggers. These triggers fire during the commit process.
Transaction control statements (COMMIT, ROLLBACK, SAVEPOINT) cannot
Be included directly as SQL trigger statements. These actions are carried
Out by Form Builder as a result of either commands or built-in procedures that you issue.