[jira] Updated: (HIVE-375) LazySimpleSerDe to directly serialize (append) int/long/byte/short etc to UTF-8 buffer

["Zheng Shao (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-375?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zheng Shao updated HIVE-375:
----------------------------

    Attachment: HIVE-375.1.patch

LazySimpleSerDe is using UTF8 buffer for serialization now.
Also added direct UTF8 serialization for byte, short, int, and long.


> LazySimpleSerDe to directly serialize (append) int/long/byte/short etc to UTF-8 buffer
> --------------------------------------------------------------------------------------
>
>                 Key: HIVE-375
>                 URL: https://issues.apache.org/jira/browse/HIVE-375
>             Project: Hadoop Hive
>          Issue Type: Improvement
>    Affects Versions: 0.3.0
>            Reporter: Zheng Shao
>         Attachments: HIVE-375.1.patch
>
>
> LazySimpleSerDe currently serialize all data into a StringBuilder, and then convert it to String and then Text.
> Even if the data is of type int/long/byte/short, we still do that unnecessary conversion.
> We should directly serialize/append int/long/byte/short to a UTF-8 buffer.
> This is a very simple change, but it is expected to save 2-3% of the time of a typical mapper (on a group-by query with some int/long columns).

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.