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From "He Yongqiang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-1801) HiveInputFormat or CombineHiveInputFormat always sync blocks of RCFile twice
Date Mon, 22 Nov 2010 18:12:14 GMT

     [ https://issues.apache.org/jira/browse/HIVE-1801?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

He Yongqiang updated HIVE-1801:
-------------------------------

    Status: Open  (was: Patch Available)

> HiveInputFormat or CombineHiveInputFormat always sync blocks of RCFile twice
> ----------------------------------------------------------------------------
>
>                 Key: HIVE-1801
>                 URL: https://issues.apache.org/jira/browse/HIVE-1801
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Siying Dong
>            Assignee: Siying Dong
>         Attachments: HIVE-1801.1.patch
>
>
> HiveInputFormat or CombineHiveInputFormat RCFile.Reader.sync() twice. One in getReader()
and one in initIOContext(). We can avoid the latter one by read the sync() position of the
former one.
> We also sync() twice for SequenceFile but since SequenceFileReader is not a part of Hive
code, maybe we should be careful when depending on the implementation.

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