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https://issues.apache.org/jira/browse/HIVE-9824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14499556#comment-14499556
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Gopal V commented on HIVE-9824:
-------------------------------
[~mmccline]: I'm hitting a corner case in one of my tests
{code}
Caused by: java.lang.Error: Duplicate column 3 in ordered column map
at
org.apache.hadoop.hive.ql.exec.vector.VectorColumnOrderedMap.add(VectorColumnOrderedMap.java:87)
at
org.apache.hadoop.hive.ql.exec.vector.VectorColumnOutputMapping.add(VectorColumnOutputMapping.java:36)
at
org.apache.hadoop.hive.ql.exec.vector.mapjoin.VectorMapJoinCommonOperator.determineCommonInfo(VectorMapJoinCommonOperator.java:319)
at
org.apache.hadoop.hive.ql.exec.vector.mapjoin.VectorMapJoinCommonOperator.<init>(VectorMapJoinCommonOperator.java:253)
at
org.apache.hadoop.hive.ql.exec.vector.mapjoin.VectorMapJoinGenerateResultOperator.<init>(VectorMapJoinGenerateResultOperator.java:82)
at
org.apache.hadoop.hive.ql.exec.vector.mapjoin.VectorMapJoinInnerBigOnlyGenerateResultOperator.<init>(VectorMapJoinInnerBigOnlyGenerateResultOperator.java:91)
at
org.apache.hadoop.hive.ql.exec.vector.mapjoin.VectorMapJoinInnerBigOnlyLongOperator.<init>(VectorMapJoinInnerBigOnlyLongOperator.java:70)
{code}
Digging deeper into that.
> LLAP: Native Vectorization of Map Join so previously CPU bound queries shift
> their bottleneck to I/O and make it possible for the rest of LLAP to shine ;)
> ----------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-9824
> URL: https://issues.apache.org/jira/browse/HIVE-9824
> Project: Hive
> Issue Type: Sub-task
> Reporter: Matt McCline
> Assignee: Matt McCline
> Priority: Critical
> Attachments: HIVE-9824.01.patch, HIVE-9824.02.patch
>
>
> Today's VectorMapJoinOperator is a pass-through that converts each row from a
> vectorized row batch in a Java Object[] row and passes it to the
> MapJoinOperator superclass.
> This enhancement creates specialized vectorized map join operator classes
> that are optimized.
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