GitHub user sameeragarwal opened a pull request:
https://github.com/apache/spark/pull/14225
[WIP][SPARK-16334] Maintain single dictionary per row-batch in vectorized
parquet reader
## What changes were proposed in this pull request?
As part of the bugfix in https://github.com/apache/spark/pull/12279, if a
row batch consist of both dictionary encoded and non-dictionary encoded pages,
we explicitly decode the dictionary for the values that are already dictionary
encoded. Currently we reset the dictionary while reading every page that can
potentially cause ` java.lang.ArrayIndexOutOfBoundsException` while decoding
pages older pages.
## How was this patch tested?
WIP
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/sameeragarwal/spark vectorized
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/14225.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 #14225
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commit 0861a8de5f7f258063dae0467a37179a94677d9d
Author: Sameer Agarwal <samee...@cs.berkeley.edu>
Date: 2016-07-15T21:11:00Z
Maintain single dictionary per row-batch in vectorized parquet reader
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