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"ORA-04020: Deadlock Detected" While Trying To Encrypt a Column Using TDE (Doc ID 1328770.1)

Last updated on DECEMBER 12, 2019

Applies to:

Advanced Networking Option - Version and later
Information in this document applies to any platform.


When attempting to encrypt a column using Transparent Data Encryption (TDE), the following error occurs.

ORA-04020: deadlock detected while trying to lock object <owner>.<table name> 

The issue can be reproduced at will with the following steps:



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