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https://issues.apache.org/jira/browse/HIVE-19629?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16488476#comment-16488476
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Prasanth Jayachandran commented on HIVE-19629:
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[~mmccline] I am seeing in many places DecimalColumnVector is type casted
without checking for instance of Decimal64ColumnVector. There are just too many
places that would require changes (variant of Decimal64ColumnVector). Before
doing that wanted to make sure if that is expected? Since orc reader now
returns Decimal64ColumnVector I would assume all vector expressions, templates
and operators has to be updated accordingly. Is that right?
> Enable Decimal64 reader after orc version upgrade
> -------------------------------------------------
>
> Key: HIVE-19629
> URL: https://issues.apache.org/jira/browse/HIVE-19629
> Project: Hive
> Issue Type: Bug
> Affects Versions: 3.1.0
> Reporter: Prasanth Jayachandran
> Assignee: Prasanth Jayachandran
> Priority: Major
> Attachments: HIVE-19629.1.patch, HIVE-19629.2.patch
>
>
> ORC 1.5.0 supports new fast decimal 64 reader. New VRB has to be created for
> making use of decimal 64 column vectors. Also LLAP IO will need a new reader
> to reader from long stream to decimal 64.
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