[jira] Commented: (HIVE-553) Add LazyBinarySerDe to Hive

["Namit Jain (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12723868#action_12723868 ] 

Namit Jain commented on HIVE-553:
---------------------------------

Should be also be binary sortable, and we can get rid of DynamicSerDe completely ?

> Add LazyBinarySerDe to Hive
> ---------------------------
>
>                 Key: HIVE-553
>                 URL: https://issues.apache.org/jira/browse/HIVE-553
>             Project: Hadoop Hive
>          Issue Type: New Feature
>    Affects Versions: 0.4.0
>            Reporter: Zheng Shao
>
> Currently the most popular SerDe in Hive is LazySimpleSerDe. LazySimpleSerDe has the benefit of being simple (use text format to store data), but its performance may suffer in the following cases:
> 1. For double values, we are storing them in text format which is very space-inefficient, and both serialization and deserialization are slow;
> 2. For complex type of columns that contains a lot of levels, we are scanning the buffer once per level, which is very inefficient.
> We should add a binary serde format that stores the data in binary format. The format should have the following properties:
> 1. Compact: it should be space-efficient;
> 2. Fast: it should be efficiently to deserialize the data, especially for double values and complex types.
> 3. It should support serializing NULL values.

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