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From "Sean Owen (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-5302) Add support for SQLContext "partition" columns
Date Wed, 16 Sep 2015 08:06:46 GMT

     [ https://issues.apache.org/jira/browse/SPARK-5302?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sean Owen updated SPARK-5302:
-----------------------------
    Assignee: Cheng Lian

> Add support for SQLContext "partition" columns
> ----------------------------------------------
>
>                 Key: SPARK-5302
>                 URL: https://issues.apache.org/jira/browse/SPARK-5302
>             Project: Spark
>          Issue Type: New Feature
>          Components: SQL
>            Reporter: Bob Tiernay
>            Assignee: Cheng Lian
>             Fix For: 1.4.0
>
>
> For {{SQLContext}} (not {{HiveContext}}) it would be very convenient to support a virtual
column that maps to part of the the file path, similar to what is done in Hive for partitions
(e.g. {{/data/clicks/dt=2015-01-01/}} where {{dt}} is a column of type {{TEXT}}). 
> The API could allow the user to type the column using an appropriate {{DataType}} instance.
This new field could be addressed in SQL statements much the same as is done in Hive. 
> As a consequence, pruning of partitions could be possible when executing a query and
also remove the need to materialize a column in each logical partition that is already encoded
in the path name. Furthermore, this would provide an nice interop and migration strategy for
Hive users who may one day use {{SQLContext}} directly.



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