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https://issues.apache.org/jira/browse/HIVE-15061?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15622176#comment-15622176
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Chaoyu Tang commented on HIVE-15061:
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The failed test seems not related to the patch. [~aihuaxu], [~mohitsabharwal]
could you review it, thanks.
> Metastore types are sometimes case sensitive
> --------------------------------------------
>
> Key: HIVE-15061
> URL: https://issues.apache.org/jira/browse/HIVE-15061
> Project: Hive
> Issue Type: Bug
> Components: API
> Affects Versions: 1.1.0
> Reporter: Thomas Tauber-Marshall
> Assignee: Chaoyu Tang
> Attachments: HIVE-15061.1.patch, HIVE-15061.1.patch, HIVE-15061.patch
>
>
> Impala recently encountered an issue with the metastore
> ([IMPALA-4260|https://issues.cloudera.org/browse/IMPALA-4260] ) where column
> stats would get dropped when adding a column to a table.
> The reason seems to be that Hive does a case sensitive check on the column
> stats types during an "alter table" and expects the types to be all lower
> case. This case sensitive check doesn't appear to happen when the stats are
> set in the first place.
> We're solving this on the Impala end by storing types in the metastore as all
> lower case, but Hive's behavior here is very confusing. It should either
> always be case sensitive, so that you can't create column stats with types
> that Hive considers invalid, or it should never be case sensitive.
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