CrateDB 是一个分布式的 SQL 数据库，使得实时存储和分析大量的机器数据变得简单。CrateDB 提供了通常与 NoSQL 数据库相关的可扩展性和灵活性，最小的 CrateDB 集群可以轻松地每秒摄取数万条记录。这些数据可以在整个集群中实时地、临时地、并行地进行查询。
CrateDB 6.0.2 现已正式发布，该版本更新内容如下：
- 修复了可能导致 PostgreSQL wire protocol 消息以错误顺序发送到客户端的问题。此问题是在使用批处理语句时触发的，其中某个语句导致解析或绑定错误。
- 修复了版本 6.0.0 中引入的回归问题。从
5.x集群升级时，它会以一种与 6.1 版本不向前兼容的方式更改 Blob 表的元数据。
NOTE：
If you are upgrading a cluster, you must be running CrateDB 5.0.0 or higher
before you upgrade to 6.0.2.
We recommend that you upgrade to the latest 5.10 release before moving to
6.0.2.
A rolling upgrade from >= 5.10.1 to 6.0.2 is supported.
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`_.
.. _back up your data: https://crate.io/docs/crate/reference/en/latest/admin/snapshots.html
.. _inserting the data into a new table: https://crate.io/docs/crate/reference/en/latest/admin/system-information.html#tables-need-to-be-recreatedx
详情可查看更新说明。
