ORA-12047: 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
ORA-12047表示无法使用PCT FAST REFRESH给指定的materialied views创建快速刷新，意味着指定的materialied views不能使用PCT FAST REFRESH。
ORA-12047: PCT FAST REFRESH cannot be used for materialized view “string”.”string”
Cause: Attempt to specify PCT FAST REFRESH when not expected.
Action: Determine why it is not necessary to specify PCT FAST REFRESH and then reissue the command without the PCT FAST REFRESH clause.
1、首先检查MVIEW语句有没有PCT FAST REFRESH，如果有将其注释掉再尝试；
2、如果MVIEW是使用REFRESH COMPLETE，那么检查表中是否存在row movement，如果存在row movement将其取消；
3、如果问题仍未解决，检查MVIEW依赖的表是不是序列和临时表，如果是改用REFRESH FORCE，如果仍然不行，可尝试将fast_refresh_mv参数变量设置为false再重新刷新；
4、 如果上述操作仍没有解决问题，可将MYVIEW改为使用REFRESH FORCE，如果仍然不行，可以drop和重新创建MVIEW。