In this post, you’ll learn more about the Oracle ErrorORA-30747: cannot create substitutable tables or columns of non final type string.string with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
ORA-30747: cannot create substitutable tables or columns of non final type string.string
Reason for the Error ORA-30747: cannot create substitutable tables or columns of non final type string.string
The user tried to create substitutable table or column of a non final type. This operation is not currently supported.
How to fix the Error ORA-30747: cannot create substitutable tables or columns of non final type string.string ?
You can fix this error in Oracle by following the below steps
Change the statement to create a non substitutable table/column.