This section describes the process of creating a mediation component that includes aggregation logic.
这一部分将介绍创建包含聚合逻辑的中介组件的过程。
Those objects are similar to the AggregateGroup used in the first section, and they keep track of the aggregation information for each group that is processed by the UDF.
这些对象与第一节中使用的AggregateGroup类似，也跟踪记录udf所处理的每一个分组的聚集信息。
The standard query operator methods that perform aggregation operations are listed in the following section.
以下部分列出了执行聚合运算的标准查询运算符方法。
The standard query operator methods that perform aggregation operations are listed in the following section.
以下部分列出了执行聚合运算的标准查询运算符方法。
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