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Posted to issues@hive.apache.org by "xiaoli (JIRA)" <ji...@apache.org> on 2017/11/02 14:01:00 UTC
[jira] [Commented] (HIVE-10427) collect_list() and collect_set()
should accept struct types as argument
[ https://issues.apache.org/jira/browse/HIVE-10427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16235777#comment-16235777 ]
xiaoli commented on HIVE-10427:
-------------------------------
(y)(y)
> collect_list() and collect_set() should accept struct types as argument
> -----------------------------------------------------------------------
>
> Key: HIVE-10427
> URL: https://issues.apache.org/jira/browse/HIVE-10427
> Project: Hive
> Issue Type: Wish
> Components: UDF
> Reporter: Alexander Behm
> Assignee: Chao Sun
> Priority: Major
> Labels: TODOC1.3
> Fix For: 1.3.0, 2.0.0
>
> Attachments: HIVE-10427.1.patch, HIVE-10427.2.patch, HIVE-10427.3.patch, HIVE-10427.4.patch
>
>
> The collect_list() and collect_set() functions currently only accept scalar argument types. It would be very useful if these functions could also accept struct argument types for creating nested data from flat data.
> For example, suppose I wanted to create a nested customers/orders table from two flat tables, customers and orders. Then it'd be very convenient to write something like this:
> {code}
> insert into table nested_customers_orders
> select c.*, collect_list(named_struct("oid", o.oid, "order_date": o.date...))
> from customers c inner join orders o on (c.cid = o.oid)
> group by c.cid
> {code}
> Thanks you for your consideration.
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