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From "Zheng Shao (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-337) LazySimpleSerDe should support array and map types
Date Wed, 18 Mar 2009 08:55:50 GMT

     [ https://issues.apache.org/jira/browse/HIVE-337?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Zheng Shao updated HIVE-337:

    Attachment: HIVE-337.1.patch

First cut.

The code is written in a way to make sure it's very easy to extend to nested types.

I also replaced DynamicSerDe/TBinaryProtocol for map-reduce value to LazySimpleSerDe. On a
typical table with 8 string columns, we are seeing the amount of data passed from mappers
to reducers decreased from 224MB to 148MB (roughly a 1/3 improvement).

Escaping are not supported yet, but it shouldn't take too much time to add.

> LazySimpleSerDe should support array and map types
> --------------------------------------------------
>                 Key: HIVE-337
>                 URL: https://issues.apache.org/jira/browse/HIVE-337
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Serializers/Deserializers
>    Affects Versions: 0.2.0
>            Reporter: Zheng Shao
>            Assignee: Zheng Shao
>            Priority: Blocker
>         Attachments: HIVE-337.1.patch
> Once we do that, we can completely deprecate DynamicSerDe/TCTLSeparatedProtocol, and
close any bugs that DynamicSerDe/TCTLSeparatedProtocol has.

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