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Hudson commented on HIVE-3149: ------------------------------ Integrated in Hive-trunk-hadoop2 #54 (See [https://builds.apache.org/job/Hive-trunk-hadoop2/54/]) HIVE-3149 Dynamically generated paritions deleted by Block level merge (Kevin Wilfong via namit) (Revision 1350946) Result = ABORTED namit : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1350946 Files : * /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/io/rcfile/merge/BlockMergeTask.java * /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/io/rcfile/merge/MergeWork.java * /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/io/rcfile/merge/RCFileMergeMapper.java * /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/GenMRFileSink1.java * /hive/trunk/ql/src/test/queries/clientpositive/merge_dynamic_partition4.q * /hive/trunk/ql/src/test/results/clientpositive/merge_dynamic_partition4.q.out > Dynamically generated paritions deleted by Block level merge > ------------------------------------------------------------ > > Key: HIVE-3149 > URL: https://issues.apache.org/jira/browse/HIVE-3149 > Project: Hive > Issue Type: Bug > Components: Query Processor > Reporter: Kevin Wilfong > Assignee: Kevin Wilfong > Priority: Blocker > Fix For: 0.10.0 > > Attachments: HIVE-3149.1.patch.txt > > > When creating partitions in a table using dynamic partitions and a Block > level merge is executed at the end of the query, some partitions may be lost. > Specifically if the values of two or more dynamic partition keys end in the > same sequence of numbers, all but the largest will be dropped. > I was not able to confirm it, but I suspect that if a map reduce job is > speculated as part of the merge, the duplicate data will not be deleted > either. > E.g. > insert overwrite table merge_dynamic_part partition (ds = '2008-04-08', hr) > select key, value, if(key % 2 == 0, 'a1', 'b1') as hr from > srcpart_merge_dp_rc where ds = '2008-04-08'; > In this query, if a Block level merge is executed at the end, only one of the > partitions ds=2008-04-08/hr=a1 and ds=2008-04-08/hr=b1 will appear in the > final table. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira