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Is your feature request related to a problem? Please describe.
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Is your feature request related to a problem? Please describe.
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当我们在使用一个数据库时,需要一些手段来调整当前会话或整个系统的行为。比如事务隔离级别、超时时间、show trace等。
Describe the solution you'd like
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使用会话变量来做这个控制。
会话变量,session variables,是MySQL中一个非常基础的功能,当前MiniOB中有非常简单的实现,但是没有到能够正常使用的程度。
由于MiniOB是一个学习使用的数据库,对各个功能要求尽量简介、够用,保持代码结构清晰,所以不用实现与MySQL完全相同的功能。
在初步阶段,需要实现一个会话变量的框架,后续能够在此基础上做扩展。
功能列表:
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Additional context
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OceanBase 数据库的实现可以参考 https://github.com/oceanbase/oceanbase/tree/develop/src/share/system_variable
由于OceanBase 是一个生产级数据库,实现较复杂,可以浏览代码做参考。
如果对这个feature感兴趣,可以联系我,随时交流。
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