| ERROR | set operator in a context not supported for fast refresh |
| CAUSE | The capability in question is not supported when the materialized view uses a set operator in this context. |
| ACTION | Re-phrase the query to avoid the use of the set operator. |
| ERROR | set operator in a context not supported for fast refresh |
| CAUSE | The capability in question is not supported when the materialized view uses a set operator in this context. |
| ACTION | Re-phrase the query to avoid the use of the set operator. |