GitHub user ueshin opened a pull request:
https://github.com/apache/spark/pull/13873
[SPARK-16167][SQL] RowEncoder should preserve array/map type nullability.
## What changes were proposed in this pull request?
Currently `RowEncoder` doesn't preserve nullability of `ArrayType` or
`MapType`.
It returns always `containsNull = true` for `ArrayType`, `valueContainsNull
= true` for `MapType` and also the nullability of itself is always `true`.
This pr fixes the nullability of them.
## How was this patch tested?
Add tests to check if `RowEncoder` preserves array/map nullability.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/ueshin/apache-spark issues/SPARK-16167
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/13873.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 #13873
----
commit f64f570430648983fd8a3664c526d96de710ea64
Author: Takuya UESHIN <ues...@happy-camper.st>
Date: 2016-06-23T06:33:04Z
Add tests to check if RowEncoder preserves array/map nullability.
commit 093a9fa9039e1403e5f9ec9e0ab5f422f97f0fc4
Author: Takuya UESHIN <ues...@happy-camper.st>
Date: 2016-06-23T06:44:39Z
Modify RowEncoder and MapObjects to preserve array/map nullability.
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