Crate Data 0.47.0/0.46.5/0.45.9 发布

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3月21日 深圳 OSC 源创会开始报名罗，送华为海思开发板
　　Crate Data 0.47.0 发布，此版本现已提供下载（ZIP），更新内容如下：
　　- Added support for array comparisons using the equals ``=`` operator.
- Support `INSERT ... ON DUPLICATE KEY UPDATE` statement
- Added case-insensitive regex operator ~*
- Support PCRE compatible regular expressions
- updated crate-admin version to 0.11.3 which contains following changes:
- fixed bug that showed custom schemas in the table list
as often as the amount of tables in that custom schema
- Added support for the ``std_dev``, ``variance`` and ``geometric_mean``
aggregation functions
- Added support for the CURRENT_TIMESTAMP expression
- Throw an error while using unknown column references in ``SELECT``
statements while parent's policy is not of type ``ignored``
- Added support for the datetime function ``extract (field from source)``
- Support column referencing in ``Update`` statement assignment
expression
- Removed undocumented feature: It is no longer possible to use sys
expressions in any context.
- don’t allow full qualified names in UPDATE assignments, INSERT and
INSERT INTO
- The ``sys.operations`` table has now a ``_nodes`` system column
which exposes information about the node the operation runs on.
　　同时还发布了 Crate 0.46.5 和 Crate 0.45.9 版本，详细改进内容请看发行说明。
　　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。
　　

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