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From "Gopal V (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-17235) Add ORC Decimal64 Serialization/Deserialization (Part 1)
Date Tue, 08 Aug 2017 05:23:02 GMT

    [ https://issues.apache.org/jira/browse/HIVE-17235?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16117875#comment-16117875
] 

Gopal V commented on HIVE-17235:
--------------------------------

[~owen.omalley]: the LongColumnVector clone needs re-implementation of all Decimal operators
to be useful.

Right now, that change adds an extra interface to test/debug with no actual operators to use
for the end to end processing.

I like the idea of a fast-path, but I'd rather not tackle the schema evolution problems right
away (i.e the planner thinks it wants a Decimal(25,4), but the data is a Decimal(18,2) etc).

We've never had that problem before where there are potentially two different vector column
types for the same underlying column, which complicates things with no perceivable gains right
now.

I've moved the patch over to HIVE-17266 so that we can tackle it in a later iteration.

> Add ORC Decimal64 Serialization/Deserialization (Part 1)
> --------------------------------------------------------
>
>                 Key: HIVE-17235
>                 URL: https://issues.apache.org/jira/browse/HIVE-17235
>             Project: Hive
>          Issue Type: Bug
>          Components: Hive
>            Reporter: Matt McCline
>            Assignee: Matt McCline
>            Priority: Critical
>         Attachments: HIVE-17235.03.patch, HIVE-17235.04.patch, HIVE-17235.05.patch, HIVE-17235.06.patch,
HIVE-17235.patch
>
>
> The storage-api changes for ORC-209.



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