GitHub user francoisprunier opened a pull request:
https://github.com/apache/spark/pull/11785
[SPARK-11319][SQL] Making StructField's nullable field documentation clearer
## What changes were proposed in this pull request?
Be more descriptive in what the nullable field of StructField is intended
for. At the moment, the description does not explain that it's only a hint to
the optimizer, and many people are mistakenly thinking that this is a "NOT
NULL" type constraint. Making it clear in the doc should help people understand
its purpose.
## How was this patch tested?
Not tested as it's only documentation
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/francoisprunier/spark StructFieldNullableDoc
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/11785.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 #11785
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commit 58514e73352a47579cf56e921172924245356c61
Author: Francois Prunier <[email protected]>
Date: 2016-03-17T15:29:08Z
making StructField nullable field documentation clearer
commit 2f986682b9c4bf9490b3c29d194e191067d21be6
Author: Francois Prunier <[email protected]>
Date: 2016-03-17T15:41:33Z
typo
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