Release Highlights
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The following lists a number of the bug fixes for *MySQL* 8.0.27, provided by Oracle, and included in Percona Server for MySQL:

* The ``default_authentication_plugin`` is deprecated. Support for this plugin may be removed in future versions. Use the ``authentication_policy`` variable.
* The ``binary`` operator is deprecated. Support for this operator may be removed in future versions. Use ``CAST(... AS BINARY)``.
* Fix for when a parent table initiates a cascading ``SET NULL`` operation on the child table, the virtual column can be set to NULL instead of the value derived from the parent table.

Find the full list of bug fixes and changes in the `MySQL 8.0.27 Release Notes <https://dev.mysql.com/doc/relnotes/mysql/8.0/en/news-8-0-27.html>`__.
