How to fix the Oracle error ORA-22857: cannot modify columns of object tables?

In this post, you’ll learn more about the Oracle ErrorORA-22857: cannot modify columns of object tables with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-22857: cannot modify columns of object tables

Reason for the Error ORA-22857: cannot modify columns of object tables

An attempt was made to alter the object table by modifing existing columns. An object table cannot be altered to modify existing columns since it is based on an object type. The table definition must be in sync with the corresponding type.

How to fix the Error ORA-22857: cannot modify columns of object tables ?

You can fix this error in Oracle by following the below steps

Create a new type with the desired attribute types and use it to create an object table. The new object table will have the desired columns.