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https://issues.apache.org/jira/browse/HIVE-775?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13701601#comment-13701601
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Edward Capriolo commented on HIVE-775:
--------------------------------------

I get the feeling that it could be a larger change then just this patch. We can 
now group on collections etc and I an curios if UDF's that return a Set which 
will now be treated as a list, will suddenly start returning a set, and what 
that will mean. I will start poking around with this a bit.
                
> Hive to support "Set" type
> --------------------------
>
>                 Key: HIVE-775
>                 URL: https://issues.apache.org/jira/browse/HIVE-775
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 0.5.0
>            Reporter: Zheng Shao
>         Attachments: HIVE-775_set_support.1.patch
>
>
> Thrift supports a type "set" which maps to "java.util.Set". Hive should 
> support this as well.
> We can either add "set" to "array", "struct", "map", or we can just treat 
> "set" as an "array" which will be easier to do.
> This is blocking Hive from doing "SELECT *" on some tables defined by thrift, 
> because thrift supports "set" right now.

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