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From "Zheng Shao (JIRA)" <>
Subject [jira] Commented: (HIVE-640) Add LazyBinarySerDe to Hive
Date Fri, 31 Jul 2009 00:53:14 GMT


Zheng Shao commented on HIVE-640:


LazyBinaryArray/LazyBinaryStruct/LazyBinaryMap: If valueIsNull[i] is true, valueStart[i] and
valueLength[i] do not need to be set, lastElementByteEnd does not need to be updated.

> Add LazyBinarySerDe to Hive
> ---------------------------
>                 Key: HIVE-640
>                 URL:
>             Project: Hadoop Hive
>          Issue Type: New Feature
>            Reporter: Zheng Shao
>            Assignee: Yuntao Jia
>         Attachments: HIVE-640.1.patch, HIVE-640.2.patch
> LazyBinarySerDe will serialize the data in binary format while supporting LazyDeserialization.
> This will be used as the SerDe for value between map and reduce, and also between different
map-reduce jobs.
> This will help improve the performance of Hive a lot.

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