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From "Bob Tiernay (JIRA)" <>
Subject [jira] [Commented] (SPARK-5302) Add support for SQLContext "partition" columns
Date Sun, 18 Jan 2015 15:40:34 GMT


Bob Tiernay commented on SPARK-5302:

This may be a duplicate of SPARK-5182. 

> Add support for SQLContext "partition" columns
> ----------------------------------------------
>                 Key: SPARK-5302
>                 URL:
>             Project: Spark
>          Issue Type: New Feature
>          Components: SQL
>            Reporter: Bob Tiernay
> 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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