Version 6.2.6

Released on 2026-04-17.

Note

If you are upgrading a cluster, you must be running CrateDB 5.0.0 or higher before you upgrade to 6.2.6.

We recommend that you upgrade to the latest 6.1 release before moving to 6.2.6.

A rolling upgrade from >= 6.1.2 to 6.2.6 is supported. Doing a rolling upgrade from an earlier version than 6.1.2 can cause runtime errors when executing statements relying on implicit casts.

Before upgrading, you should back up your data.

Warning

Tables that were created before CrateDB 5.x will not function with 6.x and must be recreated before moving to 6.x.x.

You can recreate tables using COPY TO and COPY FROM or by inserting the data into a new table.

Table of contents

See the Version 6.2.0 release notes for a full list of changes in the 6.2 series.

Fixes

• Fixed an issue that could lead to data loss for due to corruption of the metadata for tables created before Version 5.5.0, when the cluster is upgraded to versions Version 6.0.0 or newer, and certain actions take place on these tables, e.g.: ALTER TABLE SET <config_param>=value, dropping a partition, etc. The corruption will cause all columns to return NULL values, for all existing data in the table, whereas new data (via INSERT or UPDATE), can be retrieved normally.