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https://issues.apache.org/jira/browse/HIVE-938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12778941#action_12778941
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Ning Zhang commented on HIVE-938:
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@prasad, currently we don't allow changing partition keys in DDL. If we want to
support that, we need a rebuild/repartitioning, eventually touching the data as
well as the metadata.
> dynamic partitions by altering table
> ------------------------------------
>
> Key: HIVE-938
> URL: https://issues.apache.org/jira/browse/HIVE-938
> Project: Hadoop Hive
> Issue Type: New Feature
> Components: Query Processor
> Reporter: Namit Jain
>
> { create table T(a int, b string, ds string); insert overwrite table T select
> * from S where ds >= '2009-11-1' and ds <= '2009-11-16'; alter table T
> partitioned by (ds); }
> should make T partitioned by the unique values of ds
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