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From "Jinfeng Ni (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DRILL-847) Merging Receiver requires to canonicalize schemas of input batches
Date Wed, 28 May 2014 19:55:02 GMT

     [ https://issues.apache.org/jira/browse/DRILL-847?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jinfeng Ni updated DRILL-847:
-----------------------------

    Attachment: DRILL-847.1.patch

> Merging Receiver requires to canonicalize schemas of input batches 
> -------------------------------------------------------------------
>
>                 Key: DRILL-847
>                 URL: https://issues.apache.org/jira/browse/DRILL-847
>             Project: Apache Drill
>          Issue Type: Bug
>            Reporter: Jinfeng Ni
>            Assignee: Jinfeng Ni
>         Attachments: DRILL-847.1.patch
>
>
> The Merge Receivers assumes all the incoming batches have the same schemas. If the incoming
batches happen to have different schemas, the run-time generated code for merge receiver would
not be able to handle the different schemas, and could throw ClassCast Exception.
> To fix it, we need canonicalize the schemas of incoming batches for merge receiver. If
the schemas are still different after this step,  Merge Receiver would throw exception. 



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