在Hive中构造复杂数据类型

Question

我有Hive表，其原始数据类型如下：

CustomerName|City|Product1|RatingByMe|RatingByOthers|Product2|RatingByMe|RatingByOthers

我希望将它转换为复杂的数据类型，包含2个产品的2个单独行并具有此模式：

CustomerName|City|Product1|struct[RatingByMe,RatingByOthers]
CustomerName|City|Product2|struct[RatingByMe,RatingByOthers]

如何在Hive中实现这一目标？任何线索都会受到赞赏。

Answer 1

您只需使用select CustomerName, City, Product1, named_struct("RatingByMe", RatingByMe, "RatingByOthers", RatingByOthers) as rating from your_table union all select CustomerName, City, Product2, named_struct("RatingByMe", RatingByMe, "RatingByOthers", RatingByOthers) as rating from your_table 和ACCESS_FINE_LOCATION

即可

ACCESS_COARSE_LOCATION