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From "Carl Steinbach (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-1364) Increase the maximum length of SERDEPROPERTIES values (currently 767 characters)
Date Thu, 23 Sep 2010 21:46:33 GMT

     [ https://issues.apache.org/jira/browse/HIVE-1364?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Carl Steinbach updated HIVE-1364:
---------------------------------

    Attachment: HIVE-1364.4.patch.txt
                HIVE-1364.4.backport-060.patch.txt

Updated version of the patch with changes requested by John.

> Increase the maximum length of SERDEPROPERTIES values (currently 767 characters)
> --------------------------------------------------------------------------------
>
>                 Key: HIVE-1364
>                 URL: https://issues.apache.org/jira/browse/HIVE-1364
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Metastore
>    Affects Versions: 0.5.0
>            Reporter: Carl Steinbach
>            Assignee: Carl Steinbach
>             Fix For: 0.6.0, 0.7.0
>
>         Attachments: HIVE-1364.2.patch.txt, HIVE-1364.3.backport-060.patch.txt, HIVE-1364.3.patch.txt,
HIVE-1364.4.backport-060.patch.txt, HIVE-1364.4.patch.txt, HIVE-1364.patch
>
>
> The value component of a SERDEPROPERTIES key/value pair is currently limited
> to a maximum length of 767 characters. I believe that the motivation for limiting the
length to 
> 767 characters is that this value is the maximum allowed length of an index in
> a MySQL database running on the InnoDB engine: http://bugs.mysql.com/bug.php?id=13315
> * The Metastore OR mapping currently limits many fields (including SERDEPROPERTIES.PARAM_VALUE)
to a maximum length of 767 characters despite the fact that these fields are not indexed.
> * The maximum length of a VARCHAR value in MySQL 5.0.3 and later is 65,535.
> * We can expect many users to hit the 767 character limit on SERDEPROPERTIES.PARAM_VALUE
when using the hbase.columns.mapping serdeproperty to map a table that has many columns.
> I propose increasing the maximum allowed length of SERDEPROPERTIES.PARAM_VALUE to 8192.

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