Therefore, the second query is specified for layer 1 in the input panel.

因此，在输入面板中，第二个查询被指定为第1层。

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A Query Builder API offering a new layer of abstraction on top of the existing Query API in order to hide complexity and reduce programming errors.

查询构建器api在现有的查询api基础上新增一抽象层，旨在隐藏原有api的复杂性，减少编程错误。

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The transformation layer will apply an inference process (similar to forward-chaining) and check for each node in the plan tree to see which query transformations apply to that node.

转换层将应用一个推理过程(类似于前推链接法)，并检查规划树中的每个节点，看哪些查询转换适用于该节点。

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