标题: ORA-30957: cannot downgrade because there [打印本页] 作者: admin 时间: 2016-9-5 19:10 标题: ORA-30957: cannot downgrade because there ORA-30957: cannot downgrade because there are XML indexes Cause: An attempt was madeto downgrade a database that has XML indexes. Action: Drop all XML indexesbefore attempting the downgrade.