Without an adapter notification of some sort, nothing will fire unless you’ve written some DB polling facility yourself.
There are two triggers involved: a DB trigger and an IS trigger.
The DB trigger fires as configured by the trigger creation–before/after insert/update. This trigger reads the source table and writes entries into a buffer table.
The adapter notification polls the buffer table. When data is found, it is published on IS (either locally or via the Broker, depending upon your IS configuration).
The IS trigger will receive that published document and invoke the configured trigger service. That trigger service can do anything needed to process the event, including reading additional data from the source table or any other appropriate activity.
A change to the DB table definition, depending on how the change was done, may have dropped or disabled the DB trigger.
I usually recommend using Basic Notification for notifications to avoid the (minor) issues associated with the Insert/Update/Delete Notification types.
If your situation is different from what is assumed here, please advise.
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