How to fix the Oracle error ORA-12838: cannot read/modify an object after modifying it in parallel?

In this post, you’ll learn more about the Oracle ErrorORA-12838: cannot read/modify an object after modifying it in parallel with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12838: cannot read/modify an object after modifying it in parallel

Reason for the Error ORA-12838: cannot read/modify an object after modifying it in parallel

Within the same transaction, an attempt was made to add read or modification statements on a table after it had been modified in parallel or with direct load. This is not permitted.

How to fix the Error ORA-12838: cannot read/modify an object after modifying it in parallel ?

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

Rewrite the transaction, or break it up into two transactions: one containing the initial modification and the second containing the parallel modification operation.