标题: ORA-22858: invalid alteration of datatype [打印本页] 作者: admin 时间: 2016-9-1 08:14 标题: ORA-22858: invalid alteration of datatype ORA-22858: invalid alteration of datatype Cause: An attempt was madeto modify the column type to object, REF, nested
table, VARRAY or LOB type. Action: Create a new columnof the desired type and copy the current column
data to the new type using the appropriate type constructor.