+--# speeding up lookups.
+ALTER TABLE Events ADD INDEX lookup_when( person_id, event_id );
+
+ALTER TABLE Events add index lookup_event_when (event_when);
+ALTER TABLE Events add index lookup_action (action);
+ALTER TABLE Events add index lookup_on_table (on_table);
+
+ALTER TABLE Events add index lookup_action_person (action, person_id);
+