.. _version_4.2.7:

=============
Version 4.2.7
=============

Released on 2020-10-15.

.. NOTE::

    If you are upgrading a cluster, you must be running CrateDB 4.0.2 or higher
    before you upgrade to 4.2.7.

    We recommend that you upgrade to the latest 4.1 release before moving to
    4.2.7.

    A rolling upgrade from 4.1.7+ to 4.2.7 is supported.

    Before upgrading, you should `back up your data`_.

.. _back up your data: https://crate.io/docs/crate/reference/en/latest/admin/snapshots.html



.. rubric:: Table of Contents

.. contents::
   :local:


See the :ref:`version_4.2.0` release notes for a full list of changes in the
4.2 series.


Fixes
=====

- Fixed an issue that allowed users to create a self-referencing view which
  broke any further operations accessing table meta data.

- Prevent dropping of a UDF if it is still used inside any
  :ref:`generated column expressions <ddl-generated-columns-expressions>`,
  throw an error instead.
