发布于 2017-07-18 04:31:23 | 262 次阅读 | 评论: 0 | 来源: 网友投递
Mysql关系型数据库管理系统
MySQL是一个开放源码的小型关联式数据库管理系统,开发者为瑞典MySQL AB公司。MySQL被广泛地应用在Internet上的中小型网站中。由于其体积小、速度快、总体拥有成本低,尤其是开放源码这一特点,许多中小型网站为了降低网站总体拥有成本而选择了MySQL作为网站数据库。
MySQL 开发团队宣布 8.0.2 开发里程碑版本(DMR)发布,已可从 dev.mysql.com 下载。源代码可在GitHub 获得。
以下是亮点:
SQL Window Functions
Add first batch of SQL window functions (WL#9236)
Add remaining non-aggregate window functions (WL#9603)
Additional aggregate window functions (WL#9727)
JSON
Ranges in JSON path expressions (WL#9831)
Add JSON_STORAGE_SIZE / JSON_STORAGE_FREE functions (WL#9192)
Support for partial update of JSON in the optimizer (WL#8963)
Provide logical diffs for partial update of JSON values (WL#10570)
GIS
Ellipsoidal relational operations and R-tree support functions (WL#8685)
Character Sets
Add Japanese kana sensitive collation to utf8mb4 (WL#10480)
Add utf8mb4 accent sensitive and case insensitive collation (WL#10818)
Varlen keys for sorting multibyte String values (WL#9554)
Use utf8mb4 in libmysql and command tools (WL#10353)
Change MTR tests to run with new default charset (WL#10297, WL#10300, WL#10418, WL#10319, WL#10298, WL#10296)
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