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From "Josh Mahonin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PHOENIX-2088) Prevent splitting and recombining select expressions for MR integration
Date Tue, 21 Jul 2015 20:48:04 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-2088?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14635789#comment-14635789
] 

Josh Mahonin commented on PHOENIX-2088:
---------------------------------------

[~tdsilva] The previous version of the patch (PHOENIX-2088-4.4-HBase-0.98.patch) had changes
in 'DataFrameFunctions.scala' and 'ProductRDDFunctions.scala' to specifically instantiate
a new Configuration and ColumnInfo metadata list on a per-partition basis, due to those classes
not being serializable.

If this patch is reasonably close to finished and is working for mapreduce / pig, I can see
about working your new changes into the spark plugin, though I don't think I'll be able to
get to it for a day or two.

> Prevent splitting and recombining select expressions for MR integration
> -----------------------------------------------------------------------
>
>                 Key: PHOENIX-2088
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-2088
>             Project: Phoenix
>          Issue Type: Bug
>            Reporter: James Taylor
>            Assignee: Thomas D'Silva
>         Attachments: PHOENIX-2088-4.4-HBase-0.98-v2.patch, PHOENIX-2088-4.4-HBase-0.98.patch,
PHOENIX-2088-pig.patch, PHOENIX-2088-wip-v2.patch, PHOENIX-2088-wip-v3.patch, PHOENIX-2088-wip.patch
>
>
> We currently send in the select expressions for the MR integration with a delimiter separated
string, split based on the delimiter, and then recombine again using a comma separator. This
is problematic because the delimiter character may appear in a select expression, thus breaking
this logic. Instead, we should use a comma as the delimiter and avoid splitting and recombining
as it's not necessary in that case. Instead, the entire string can be used as-is in that case
to form the select expressions.



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