getAggregateResult UDF（设置为 斜体）需要对二进制串解码，然后访问正确的聚集对象。

The getAggregateResult UDF (set in italics) needs to decode the binary string and access the correct aggregation object.

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它允许您将系统错误消息作为字符串进行访问。

It allows you to access the system error message as a string.

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清单中的各访问器方法将签名字符串作为参数。

Each of the visitor methods shown takes a signature string as a parameter.

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