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Posted to issues@hive.apache.org by "Harsh J (JIRA)" <ji...@apache.org> on 2016/04/08 22:53:25 UTC
[jira] [Commented] (HIVE-13275) Add a toString method to
BytesRefArrayWritable
[ https://issues.apache.org/jira/browse/HIVE-13275?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15232906#comment-15232906 ]
Harsh J commented on HIVE-13275:
--------------------------------
Failing tests don't appear to be related.
> Add a toString method to BytesRefArrayWritable
> ----------------------------------------------
>
> Key: HIVE-13275
> URL: https://issues.apache.org/jira/browse/HIVE-13275
> Project: Hive
> Issue Type: Improvement
> Components: File Formats, Serializers/Deserializers
> Affects Versions: 1.1.0
> Reporter: Harsh J
> Assignee: Harsh J
> Priority: Trivial
> Attachments: HIVE-13275.000.patch
>
>
> RCFileInputFormat cannot be used externally for Hadoop Streaming today cause Streaming generally relies on the K/V pairs to be able to emit text representations (via toString()).
> Since BytesRefArrayWritable has no toString() methods, the usage of the RCFileInputFormat causes object representation prints which are not useful.
> Also, unlike SequenceFiles, RCFiles store multiple "values" per row (i.e. an array), so its important to output them in a valid/parseable manner, as opposed to choosing a simple joining delimiter over the string representations of the inner elements.
> I propose adding a standardised CSV formatting of the array data, such that users of Streaming can then parse the results in their own script. Since we have OpenCSV as a dependency already, we can make use of it for this purpose.
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