Subject Re: Triggers on table MON$ATTACHMENTS
Author
> ---In firebird-support@yahoogroups.com, <slibre@...> wrote :
>
> I can create triggers in the MON$ATTACHMENTS table?

  No

> I use Firebird 2.5.6 with flamerobin
>
> I want to do something like "After Delete"
> delete from table1 where con = old.MON$ATTACHMENT_ID

  RTFM: Database triggers

http://www.firebirdsql.org/file/documentation/reference_manuals/fblangref25-en/html/fblangref25-ddl-trgr.html#fblangref25-ddl-trgr-dbtrigger