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Oracle® Database 11g / 12c / 18c error codes ORA-00056: DDL lock on object '[string].[string]' is already held in an incompatible mode
ORA-00056: DDL lock on object '[string].[string]' is already held in an incompatible mode
Oracle Error Code: ORA-00056
Cause: An attempt was made to acquire a DDL lock that is already locked.
Action: This happens if you attempt to drop a table that has parse locks on it.