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In PostgreSQL 8.3 database I have ‘bookings’ table referencing ‘booking_transactions’ table by ID. So that each booking belongs to a single transaction. It’s possible to delete bookings from the database.
How can I make sure that a ‘booking_transactions’ row is automatically deleted when all the ‘bookings’ referencing it are gone?
I suspect an ON DELETE ‘bookings’ trigger won’t work, as it must query the other rows of the ‘bookings’ table.
Trigger on ‘bookings’ should work there’s no problem to query the table itself in the trigger function.