| ERROR | PCT FAST REFRESH cannot be used for materialized view string.string |
| CAUSE | PCT refresh is either not enabled on this materialized view or not possible after set of the base table changes since last refresh. |
| ACTION | Use just REFRESH FORCE, which will reinstantiate the entire table and try to pick the best refresh method on the materialized view Do explain_mview to look at the cause why PCT refresh is not possible on this materialized view |