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https://issues.apache.org/jira/browse/HIVE-5011?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13732718#comment-13732718
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Daniel Dai commented on HIVE-5011:
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Looks good. In dynamic partition, we shall disable customized external
partition location. We can support path pattern in the future, but that's more
complex to do.
+1
> Dynamic partitioning in HCatalog broken on external tables
> ----------------------------------------------------------
>
> Key: HIVE-5011
> URL: https://issues.apache.org/jira/browse/HIVE-5011
> Project: Hive
> Issue Type: Bug
> Components: HCatalog
> Reporter: Sushanth Sowmyan
> Assignee: Sushanth Sowmyan
> Priority: Critical
> Attachments: HIVE-5011.patch
>
>
> Dynamic partitioning with HCatalog has been broken as a result of
> HCATALOG-500 trying to support user-set paths for external tables.
> The goal there was to be able to support other custom destinations apart from
> the normal "hive-style" partitions. However, it is not currently possible for
> users to set paths for dynamic ptn writes, since we don't support any way for
> users to specify "patterns"(like, say "$\{rootdir\}/$v1.$v2/") into which
> writes happen, only "locations", and the values for dyn. partitions are not
> known ahead of time. Also, specifying a custom path messes with the way
> dynamic ptn. code tries to determine what was written to where from the
> output committer, which means that even if we supported patterned-writes
> instead of location-writes, we still have to do some more deep diving into
> the output committer code to support it.
> Thus, my current proposal is that we honour writes to user-specified paths
> for external tables *ONLY* for static partition writes - i.e., if we can
> determine that the write is a dyn. ptn. write, we will ignore the user
> specification. (Note that this does not mean we ignore the table's external
> location - we honour that - we just don't honour any HCatStorer/etc provided
> additional location - we stick to what metadata tells us the root location is.
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