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From wagnermarkd <...@git.apache.org>
Subject [GitHub] orc pull request #40: ORC-54: Evolve schemas based on field name rather than...
Date Thu, 16 Jun 2016 07:01:24 GMT
GitHub user wagnermarkd opened a pull request:

    https://github.com/apache/orc/pull/40

    ORC-54: Evolve schemas based on field name rather than index

    Change evolution to compare column names when building mapping.
    
    Misc notes:
    - I've added a setting orc.tolerate.missing.schema to allow working with data before HIVE-4243
was fixed. This is important for anyone who has older data, though it limits the evolutions
that can be supported
    - A lot of changes in RecordReaderImpl to make the reader column vs writer column difference
explicit
    - SARG tests are passing, but there's no test coverage for SARG + evolution. Will work
on that.
    - Removed some unneeded checked exceptions.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/wagnermarkd/orc ORC-54-public

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/orc/pull/40.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #40
    
----
commit c24200900e55437a242034eda6a5cd5122cc3acc
Author: Mark Wagner <mwagner@apache.org>
Date:   2016-05-18T21:24:16Z

    ORC-54: Evolve schemas based on field name rather than index

----


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