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Posted to issues@hive.apache.org by "Alan Gates (JIRA)" <ji...@apache.org> on 2015/12/08 00:59:11 UTC

[jira] [Assigned] (HIVE-10459) Add materialized views to Hive

     [ https://issues.apache.org/jira/browse/HIVE-10459?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alan Gates reassigned HIVE-10459:
---------------------------------

    Assignee: Julian Hyde  (was: Alan Gates)

> Add materialized views to Hive
> ------------------------------
>
>                 Key: HIVE-10459
>                 URL: https://issues.apache.org/jira/browse/HIVE-10459
>             Project: Hive
>          Issue Type: Improvement
>          Components: Views
>            Reporter: Alan Gates
>            Assignee: Julian Hyde
>         Attachments: HIVE-10459.2.patch, HIVE-10459.patch
>
>
> Materialized views are useful as ways to store either alternate versions of data (e.g. same data, different sort order) or derivatives of data sets (e.g. commonly used aggregates).  It is useful to store these as materialized views rather than as tables because it can give the optimizer the ability to understand how data sets are related.



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