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https://issues.apache.org/jira/browse/HIVE-3279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13423663#comment-13423663
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Hudson commented on HIVE-3279:
------------------------------
Integrated in Hive-trunk-h0.21 #1569 (See
[https://builds.apache.org/job/Hive-trunk-h0.21/1569/])
HIVE-3279: Table schema not being copied to Partitions with no columns
(Travis Crawford via Ashutosh Chauhan) (Revision 1366058)
Result = FAILURE
hashutosh :
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1366058
Files :
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/metadata/Partition.java
* /hive/trunk/ql/src/test/queries/clientpositive/serde_reported_schema.q
* /hive/trunk/ql/src/test/results/clientpositive/serde_reported_schema.q.out
> Table schema not being copied to Partitions with no columns
> -----------------------------------------------------------
>
> Key: HIVE-3279
> URL: https://issues.apache.org/jira/browse/HIVE-3279
> Project: Hive
> Issue Type: Bug
> Reporter: Travis Crawford
> Assignee: Travis Crawford
> Fix For: 0.10.0
>
> Attachments: HIVE-3279_serde_reported_partition_schema.1.patch
>
>
> Hive has a feature where {{Partition}}'s without any defined columns use the
> {{Table}} schema. This happens in
> {{[Partition.initialize|https://github.com/apache/hive/blob/trunk/ql/src/java/org/apache/hadoop/hive/ql/metadata/Partition.java#L167]}}
> {code}
> // set default if columns are not set
> if (tPartition.getSd().getCols() == null) {
> if (table.getCols() != null) {
> tPartition.getSd().setCols(table.getCols());
> }
> }
> {code}
> There's an issue though, because
> {{[Table.getEmptyTable|https://github.com/apache/hive/blob/trunk/ql/src/java/org/apache/hadoop/hive/ql/metadata/Table.java#L121]}}
> initializes cols to an empty array, which of course is not null, causing the
> above feature to not work as expected.
> I'm not sure of the fix - is there a case where cols can indeed be null? I
> think the best thing to do here is:
> {code}
> - if (tPartition.getSd().getCols() == null) {
> + if (tPartition.getSd().getCols() == null ||
> tPartition.getSd().getCols().size() == 0) {
> {code}
> Thoughts?
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