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From "Namit Jain (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3833) object inspectors should be initialized based on partition metadata
Date Wed, 26 Dec 2012 16:36:12 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3833?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13539588#comment-13539588
] 

Namit Jain commented on HIVE-3833:
----------------------------------

The object inspectors need to be initialized based on partition metadata.
That leaves us with the following options:
1. Create an operator tree per partition
2. Create a dummy operator after table scan (which converts the partition data into table
data).
   This operator will be different for different inputs.

Option 2. seems like a better option.
                
> object inspectors should be initialized based on partition metadata
> -------------------------------------------------------------------
>
>                 Key: HIVE-3833
>                 URL: https://issues.apache.org/jira/browse/HIVE-3833
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Namit Jain
>            Assignee: Namit Jain
>
> Currently, different partitions can be picked up for the same input split based on the
> serdes' etc. And, we dont allow to change the schema for LazyColumnarBinarySerDe.
> Instead of that, different partitions should be part of the same split, only if the
> partition schemas exactly match. The operator tree object inspectors should be based
> on the partition schema. That would give greater flexibility and also help using binary
serde with rcfile

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