Oracle DB Error ORA-02087 object locked by another process in same transaction

The following is the cause of this error:

A database link is being used in the cluster database environment that loops back to the same instance. One session is trying to convert a lock that was obtained by the other session.

Action you can take to resolve this issue: Get the more restrictive lock first. For example, if session 1 gets a share lock and session 2 gets an exclusive lock on the same object, get the exclusive lock first. Or use the same session to access the object.

Tags: Database, Microsoft, Oracle, SQL, Software, DBMS

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