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https://issues.apache.org/jira/browse/HIVE-1054?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13208940#comment-13208940
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Ashutosh Chauhan commented on HIVE-1054:
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I think problem there is what will happen to existing partitions? One has to
come up for the convention of how does adding / dropping of column maps to dir
structure on hdfs and then possibly need to move around/rename partition dirs
to match with this convention.
> "CHANGE COLUMN" does not support changing partition column types.
> -----------------------------------------------------------------
>
> Key: HIVE-1054
> URL: https://issues.apache.org/jira/browse/HIVE-1054
> Project: Hive
> Issue Type: Bug
> Reporter: He Yongqiang
>
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