Version 2.3.6

Released on 2018/04/04.


If you are upgrading a cluster, you must be running CrateDB Version 1.1.3 or higher before you upgrade to 2.3.6.

If you want to perform a rolling upgrade, your current CrateDB version number must be at least Version 2.3.0. Any upgrade from a version prior to this will require a full restart upgrade.


Before upgrading, you should back up your data.

Table of contents



  • Arrays can now contain mixed types if they’re safely convertible. JSON libraries tend to encode values like [ 0.0, 1.2] as [ 0, 1.2 ], this caused an error because of the strict type match we enforced before.


  • Do not allow renaming a table when connected to a read-only node.

  • Fixed an issue that caused an error to be thrown when filtering on a partitioned table using a column which is a source column for a GENERATED column which in turn is used for partitioning. E.g.:

    CREATE TABLE parted_t(
        t TIMESTAMP,
        day TIMESTAMP GENERATED ALWAYS AS date_trunc('day', t)
    ) PARTITIONED BY (day);
    SELECT * FROM parted_t WHERE t > 1522170000000;