The ability to load data into HashMaps where column names are not known at query time.

将数据加载到 HashMaps 的功能（在查询时列名是未知的）。

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The field types supported are: primitives (int, string, etc), Date, Timestamp, as well as objects composed of primitives, hashmaps, and collections (non-generic) of objects.

支持的字段类型：原生类型(int、string等)、Date、Timestamp、以及原生类型的组合类型、hashmap、对象集合(非范型)。

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