Crate Data 0.46.0 发布，此版本现已提供下载，更新内容如下：
- Add support for user-defined schemas.
- Changed output of column names in error messages to subscript notation,
so the correct notation to address columns in sql is reflected
- implemented table ``information_schema.schemata`` with column ``schema_name``
listing all available schemas
- Array types are now fully supported in dynamic schemas. Note that
Crate performs an internal migration, therefore downgrading to an
older version is not supported
- Updated Elasticsearch to 1.4.1
- Improve performance of regex functions by actually
pre-compiling their used patterns (if given as literal)
- Add sql query breaker which will terminate a query execution if too
much memory will be consumed.
- Use flake ids for interal id generation
- Added Support for Column Policies, which can be used to define if a
table enforces its defined schema or if it's allowed to store
additional columns which are not defined in the schema.
- Throw an error while using unknown root columns on SELECT
Crate Data 是一个开源的大规模的可伸缩的数据存储系统，无需任何系统管理需求。提供强大的搜索功能。用于存储各种表格数据、非结构化数据和二进制对象。并可通过 SQL 进行检索。易于安装和使用，支持高可用性和实时大规模并行访问和处理。
下载地址：https://crate.io/download/
来自:开源中国社区
