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Posted to dev@hive.apache.org by "Zheng Shao (JIRA)" <ji...@apache.org> on 2009/03/18 09:55:50 UTC
[jira] Updated: (HIVE-337) LazySimpleSerDe should support array and
map types
[ 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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