Version 2.0.5

Released on 2017/07/11.


If you are upgrading a cluster, you must be running CrateDB Version 1.1.3 or higher before you upgrade to 2.0.5.

If you want to perform a rolling upgrade, your current CrateDB version number must be Version 2.0.0. If you want to upgrade from a version prior to this, the upgrade will introduce all of the breaking changes listed for Version 2.0.0, and will require a full restart upgrade.

Consult the upgrade notes for Version 2.0.0 when upgrading.


If you’re using CrateDB’s BLOB storage you should consult the Upgrade Notes.

Before upgrading, you should back up your data.

Table of contents

Upgrade Notes

Due to a bug introduced in Version 2.0.0 that can cause loss of BLOB data, it is necessary to perform a rolling upgrade if you’re running a version >= 2.0.0 and < 2.0.4 and using BLOB tables.

Additionally, the number of replicas needs to be set to at least 1 for all blob tables and you need to make sure that data is fully replicated before continuing.

Only then you may upgrade one node after each other.



  • Fixed an issue that caused an exception to be thrown when using COUNT(*) with a JOIN on 3 or more tables.

  • Fixed a regression that caused queries with a GROUP BY on array columns, which are wrapped in a scalar function to fail.

  • Fixed an issue that caused an exception if a table that has been created with CrateDB version <= 1.1 is modified using ALTER TABLE.