GitHub user HyukjinKwon opened a pull request:
https://github.com/apache/spark/pull/16611
[SPARK-17967][SPARK-17878][SQL][PYTHON] Support for array as an option for
datasources and for multiple values in nullValue in CSV
## What changes were proposed in this pull request?
Multiple values in `nullValue` is actually more reasonable and `read.csv()`
in R already supports it. In practice, there might be many values that should
be treated as `null`. Also, this matches the behaviour to R's one as well.
This PR suggests to add an API in Python, Scala and Java that takes
`Array[String]` and the support for multiple values in `nullValue` option in
CSV.
In case of R, there seems requiring to be more changes. This will be
followed up by this PR.
## How was this patch tested?
Unit test in `readwriter.py`, `CSVTypeCastSuite.scala` and `CSVSuite.scala`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/HyukjinKwon/spark SPARK-17967
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16611.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 #16611
----
commit 387e723bf55d88b85074ee5a74b8471a50837ab7
Author: hyukjinkwon <gurwls...@gmail.com>
Date: 2016-11-08T14:11:07Z
Support for array as an option for datasources and for multiple values in
nullValue
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