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https://issues.apache.org/jira/browse/CRUNCH-92?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13473046#comment-13473046
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Gabriel Reid commented on CRUNCH-92:
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I can definitely see that this would be useful.
The empty readFields and writeFields methods in JdbcWritable seem very
dangerous -- there's nothing that stops someone from using objects of that type
as a Writable, and the pipeline will (probably) run without any errors, and
just give totally incorrect results.
I think it would be best if there is some kind of compile-time safety to force
users to write the mapping code from ResultSet to a Writable type. Another
option would be to try to integrate Sqoop, although I'm not sure what that
would involve.
> It should be possble to read data from DataBase
> -----------------------------------------------
>
> Key: CRUNCH-92
> URL: https://issues.apache.org/jira/browse/CRUNCH-92
> Project: Crunch
> Issue Type: New Feature
> Reporter: Rahul Sharma
> Attachments: 0001-CRUNCH-92-Database-Source-in-crunch.patch
>
>
> At times we need to read some data from RDBMS in a MR job, so crunch should
> have a Source for the same.
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