For my tool, I like to determine which DDL event items are involved in a DDL trigger (FB 3.0).

I already figured out that 

SELECT IIF(BIN_AND(t.rdb$trigger_type + 1, 0) = 0, 'BEFORE', 'AFTER') AS TriggerMoment FROM rdb$triggers

will give me the BEFORE or AFTER moment.

But how can I query from rdb$triggers (rdb$trigger_type field) whether 'CREATE TABLE' or 'ALTER CHARACTER SET' or any other DDL event is involved?

Thanks,

Robert