64

MySQL8.0新特性——不可见索引(Invisible Indexes)-笨小孩的dba之路

 5 years ago
source link: http://blog.51cto.com/fengfeng688/2143982
Go to the source link to view the article. You can view the picture content, updated content and better typesetting reading experience. If the link is broken, please click the button below to view the snapshot at that time.
MySQL8.0新特性——不可见索引(Invisible Indexes)MySQL8.0开始支持看不见的索引。一个看不见的索引根本不被优化器使用,但是通常是保持正常的。默认情况下索引是可见的。不可见的索引使测试在查询性能上删除索引的效果成为可能,而不需要在需要索引的情况下进行破坏性的更改。注意: 该特性适用于除主键以外的索引(显式或隐式)默认情况下索引是可见的!。 将inde

About Joyk


Aggregate valuable and interesting links.
Joyk means Joy of geeK