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。 使用方法： Crate Data 0.46.0 发布，大规模数据存储系统下载地址
