Database Triggers
Triggers can be defined to fire upon “database events”;a mixture of events that act across the scope of a session (connection), and events that act across the scope of an individual transaction:
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CONNECT
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DISCONNECT
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TRANSACTION START
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TRANSACTION COMMIT
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TRANSACTION ROLLBACK
[fblangref50-ddl-trgr-ddltrigger] are a subtype of database triggers, covered in a separate section.