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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-2777) Pig storage handler should implement LoadMetadata
Date Wed, 28 Sep 2011 22:20:45 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-2777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13116855#comment-13116855
] 

Hudson commented on CASSANDRA-2777:
-----------------------------------

Integrated in Cassandra-0.8 #348 (See [https://builds.apache.org/job/Cassandra-0.8/348/])
    Pig storage handler implements LoadMetadata interface.
Patch by brandonwilliams, reviewed by Jeremy Hanna for CASSANDRA-2777

brandonwilliams : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1177083
Files : 
* /cassandra/branches/cassandra-0.8/contrib/pig/src/java/org/apache/cassandra/hadoop/pig/CassandraStorage.java

                
> Pig storage handler should implement LoadMetadata
> -------------------------------------------------
>
>                 Key: CASSANDRA-2777
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2777
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Contrib
>            Reporter: Brandon Williams
>            Assignee: Brandon Williams
>            Priority: Minor
>             Fix For: 0.8.7
>
>         Attachments: 2777-v2.txt, 2777.txt
>
>
> The reason for this is many builtin functions like SUM won't work on longs (you can workaround
using LongSum, but that's lame) because the query planner doesn't know about the types beforehand,
even though we are casting to native longs.
> There is some impact to this, though.  With LoadMetadata implemented, existing scripts
that specify schema will need to remove it (since LM is doing it for them) and they will need
to conform to LM's terminology (key, columns, name, value) within the script.  This is trivial
to change, however, and the increased functionality is worth the switch.

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