… enough. The trigger method has a lot of problems. Triggers add a significant overhead. When the structure of a table is changed, the triggers… is confusing it should be clear in a moment. Lets create a table, insert some rows, add a change log, delete rows and then… change logs contain three additional metadata columns: dml_type, uow_id and fv$server_id. These columns represent the type of change…

… a query, but ultimately it arrives at similar conclusions as the star system: define an index with all columns in the predicate, add columns to avoid sorting per query, and add further columns to cover the select-list. The difference is that QUBE helps you to predict quantitatively how much a new…