GitHub user raofu opened a pull request:
https://github.com/apache/spark/pull/22113
[SPARK-25126] Lazily create Reader for orc files
## What changes were proposed in this pull request?
Currently Reader is created for every orc file under the directory and then
the first one
with non-empty schema is returned. Using `view` lazily creates Reader
instead.
## How was this patch tested?
(Please explain how this patch was tested. E.g. unit tests, integration
tests, manual tests)
(If this patch involves UI changes, please attach a screenshot; otherwise,
remove this)
Please review http://spark.apache.org/contributing.html before opening a
pull request.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/raofu/spark SPARK-25126
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/22113.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 #22113
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commit 9f5aad0591b9912f5186cd2da8328b348eea5425
Author: Rao Fu <rao@...>
Date: 2018-08-15T20:20:45Z
[SPARK-25126] Lazily create Reader for orc files
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