ORA-22858: invalid alteration of datatype ORACLE 报错 故障修复 远程处理

文档解释

ORA-22858: invalid alteration of datatype

Cause: An attempt was made to modify the column type to object, REF, nested table, VARRAY or LOB type.

Action: Create a new column of the desired type and copy the current column data to the new type using the appropriate type constructor.