GitHub user dongjoon-hyun reopened a pull request:
https://github.com/apache/spark/pull/18991
[SPARK-21783][SQL][WIP] Turn on ORC filter push-down by default
## What changes were proposed in this pull request?
ORC filter push-down is disabled by default from the beginning,
[SPARK-2883](https://github.com/apache/spark/commit/aa31e431fc09f0477f1c2351c6275769a31aca90#diff-41ef65b9ef5b518f77e2a03559893f4dR149
)
Now, Apache Spark starts to depend on Apache ORC 1.4.0. For Apache Spark
2.3, this PR turns on ORC filter push-down by default like Parquet
([SPARK-9207](https://issues.apache.org/jira/browse/SPARK-21783)) as a part of
[SPARK-20901](https://issues.apache.org/jira/browse/SPARK-20901), "Feature
parity for ORC with Parquet".
## How was this patch tested?
Pass the Jenkins with the existing tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dongjoon-hyun/spark SPARK-21783
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/18991.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 #18991
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commit 2bc2b17aba5231c6ac3e0ab7c830acc56790df9f
Author: Dongjoon Hyun <dongjoon@...>
Date: 2017-08-18T07:26:18Z
[SPARK-21783][SQL] Turn on ORC filter push-down by default
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