标题: ORA-22859: invalid modification of columns [打印本页] 作者: admin 时间: 2016-9-1 08:14 标题: ORA-22859: invalid modification of columns ORA-22859: invalid modification of columns Cause: An attempt was madeto modify an object, REF, VARRAY, nested table, or
LOB column type. Action: Create a new columnof the desired type and copy the current column
data to the new type using the appropriate type constructor.