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From "Chao Sun (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-10427) collect_list() and collect_set() should accept struct types as argument
Date Thu, 21 May 2015 17:33:17 GMT

     [ https://issues.apache.org/jira/browse/HIVE-10427?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chao Sun updated HIVE-10427:
----------------------------
    Attachment: HIVE-10427.3.patch

Added a few tests for decimal and varchar. Also the behavior for sort_array to resolve the
ordering issue of test result. Currently sort_array only accept list of primitives, but since
we already support comparison between nested types (map, struct, union, etc), I think it makes
sense to remove this limitation.


> 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
>         Attachments: HIVE-10427.1.patch, HIVE-10427.2.patch, HIVE-10427.3.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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