Subject FB 2.0: Blank triggers
Author red_october_canada
When I use FlameRobin to pull up the DDL on my FB DB, I notice that
there are triggers on tables that I did not explicitly create. They
have names like CHECK_1, CHECK_15. I examine the SYSTEM table
RDB$TRIGGERS and find that the RDB$TRIGGER_SOURCE field for these
triggers is null.

What are these triggers? Why are they there? Is my Firebird loosing
it's feathers?