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https://issues.apache.org/jira/browse/HIVE-972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12800402#action_12800402
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John Sichi commented on HIVE-972:
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OK, good.
To clarify: the column descriptor metadata is what gets frozen when a view is
defined, not any data associated with it. When the view (whether virtual or
materialized) is redefined, then its column descriptors may change as well.
For a materialized view, we would have a choice between discarding its existing
partitions (implying they would need to be rematerialized according to the new
view definition) versus attempting to preserve them, transforming their
contents on the fly in order to match the updated view definition. For
example, if the effect of the view redefinition was to delete one of the
columns, then we could just project this column away when reading from the old
partitions. This is purely theoretical until we have a design for materialized
views (including how they support partitioning).
> support views
> -------------
>
> Key: HIVE-972
> URL: https://issues.apache.org/jira/browse/HIVE-972
> Project: Hadoop Hive
> Issue Type: New Feature
> Components: Metastore, Query Processor
> Reporter: Namit Jain
> Assignee: John Sichi
> Attachments: HIVE-972.1.patch
>
>
> Hive currently does not support views.
> It would be a very nice feature to have.
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