Version 3.0.2

Released on 2018/06/12.


If you are upgrading a cluster, you must be running CrateDB 2.0.4 or higher before you upgrade to 3.0.2.

We recommend that you upgrade to the latest 2.3 release before moving to 3.0.2.

If you want to perform a rolling upgrade, your current CrateDB version number must be at least Version 3.0.0. Any upgrade from a version prior to this will require a full restart upgrade.

When restarting, CrateDB will migrate indexes to a newer format. Depending on the amount of data, this may delay node start-up time.

Please consult the Upgrade Notes before upgrading.


Tables that were created prior to upgrading to CrateDB 2.x will not function with 3.0 and must be recreated before moving to 3.0.x.

You can recreate tables using COPY TO and COPY FROM while running a 2.x release into a new table, or by inserting the data into a new table.

Before upgrading, you should back up your data.

Table of contents



  • Fixed an issue that caused an UnsupportedFeatureException to be thrown for queries with a WHERE clause which contains an equality comparison that references a table column in both sides. E.g.:

    WHERE t.i = abs(t.i)
  • Fixed an issue that could cause a cluster check warning, telling the user to upgrade tables which do not require upgrades.

  • Fixed an issue that could cause HTTP requests using empty bulk_args to fail.

  • Fixed a NullPointerException which could be thrown when deleting a table and querying the size column from the sys.shards table.