Oracle® Database 8i | 9i | 10g | 11g | 12c | 18c | 19c Error Codes
Information for Database Error Code 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
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.
Error Type: ORA
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