阶段 1 - 定义用户的查询语言

Stage 1 - Defining the User's Query Language

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用户可以将处理程序添加到预先定义的阶段，并且按照这些处理程序运行的顺序进行配置。

The user can add handlers to the predefined phases and configure in what order the handlers should be run.

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除预先定义的阶段和处理程序集外，用户还可以在操作级别、服务级别或全局级别配置用户阶段和相关处理程序。

In addition to the set of predefined phases and handlers, users can configure user phases and associated handlers at the operation, service, or global level.

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