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Posted to dev@hive.apache.org by "Zheng Shao (JIRA)" <ji...@apache.org> on 2009/02/04 07:29:59 UTC
[jira] Issue Comment Edited: (HIVE-270) Add a lazy-deserialized
SerDe for space and cpu efficient serialization of rows with primitive
types
[ https://issues.apache.org/jira/browse/HIVE-270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12670257#action_12670257 ]
zshao edited comment on HIVE-270 at 2/3/09 10:29 PM:
----------------------------------------------------------
This SerDe should support the quoting (ENCLOSED BY) and escaping (ESCAPED BY) as MySQL does for "LOAD DATA" and "SELECT INTO OUTFILE".
http://dev.mysql.com/doc/refman/5.0/en/load-data.html
Note that neither the quoting nor the escaping in the MySQL way supports String.split().
was (Author: zshao):
This SerDe should support the quoting (ENCLOSED BY) and escaping (ESCAPED BY) as MySQL does for "LOAD DATA" and "SELECT INTO OUTFILE".
http://dev.mysql.com/doc/refman/5.0/en/load-data.html
> Add a lazy-deserialized SerDe for space and cpu efficient serialization of rows with primitive types
> ----------------------------------------------------------------------------------------------------
>
> Key: HIVE-270
> URL: https://issues.apache.org/jira/browse/HIVE-270
> Project: Hadoop Hive
> Issue Type: New Feature
> Components: Serializers/Deserializers
> Reporter: Zheng Shao
> Assignee: Zheng Shao
>
> We want to add a lazy-deserialized SerDe for space and cpu efficient serialization of rows with primitive types.
> This SerDe will share the same format as MetadataTypedColumnsetSerDe/TCTLSeparatedProtocol to be backward compatible.
> This SerDe will be used to replace the default table SerDe.
> For simplicity, we don't plan to support nested structure with this SerDe.
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