[jira] [Updated] (HIVE-4966) Introduce Collect_Map UDAF

["Harish Butani (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-4966?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Harish Butani updated HIVE-4966:
--------------------------------

    Attachment: Collect_map.patch

> Introduce Collect_Map UDAF
> --------------------------
>
>                 Key: HIVE-4966
>                 URL: https://issues.apache.org/jira/browse/HIVE-4966
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Harish Butani
>            Assignee: Harish Butani
>         Attachments: Collect_map.patch
>
>
> Similar to Collect_Set. For e.g. on a Txn table
> {noformat}
> Txn(customer, product, amt)
> select customer, collect_map(product, amt)
> from txn
> group by customer
> {noformat}
> Would give you an activity map for each customer.
> Other thoughts:
> - have explode do the inverse on maps just as it does for sets today.
> - introduce a table function that outputs each value as a column. So in the e.g. above you get an activity matrix instead of a map. 



--
This message was sent by Atlassian JIRA
(v6.1.5#6160)