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https://issues.apache.org/jira/browse/HIVE-7082?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14001399#comment-14001399
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Ashutosh Chauhan commented on HIVE-7082:
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LGTM +1 [~jnp] Would you like to take a look too?
> Vectorized parquet reader should create assigners only for the columns it
> assigns, not for scratch columns
> ----------------------------------------------------------------------------------------------------------
>
> Key: HIVE-7082
> URL: https://issues.apache.org/jira/browse/HIVE-7082
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Affects Versions: 0.13.0, 0.14.0
> Reporter: Remus Rusanu
> Assignee: Remus Rusanu
> Priority: Minor
> Labels: parquet, vectorization
> Attachments: HIVE-7082.1.patch
>
>
> The code in VectorizedParquetRecordReader.next and in
> VectorColumnAssignFactory.buildAssigners iterates for all columns in the
> vectorization context trying to build an assigner for it. Scratch columns do
> not require assigners. Fix is to simply use the writables.length instead of
> outputBatch.numCols.
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