ORA-04021: timeout occurred while waiting to lock object while dropping Materialized View.
1 min readA materialized view, or snapshot as they were previously known, is a table segment whose contents are periodically refreshed based on a query, either against a local or remote table.
SQL> drop materialized view HR.EMPLOYEES ;
ERROR at line 1:
ORA-04021: timeout occurred while waiting to lock object
To resolve this issue, we have to drop materialized view summary first:
SQL> drop summary HR.EMPLOYEES;
Summary dropped.
SQL> drop materialized view HR.EMPLOYEES;
Materialized view dropped.
