GitHub user cloud-fan opened a pull request:
https://github.com/apache/spark/pull/23249
[SPARK-26297][SQL] improve the doc of Distribution/Partitioning
## What changes were proposed in this pull request?
Some documents of `Distribution/Partitioning` are stale and misleading,
this PR fixes them:
1. `ClusteredDistribution` doesn't have intra-partition requirement
2. `OrderedDistribution` does not require tuples that share the same value
being colocated in the same partition.
3. `RangePartitioning` can provide a weaker guarantee for a prefix of its
`ordering` expressions.
## How was this patch tested?
comment-only PR.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloud-fan/spark doc
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/23249.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 #23249
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commit 24ea28abd5a385351703335df33b26838d203fe3
Author: Wenchen Fan <wenchen@...>
Date: 2018-12-06T15:47:23Z
improve the doc of Distribution/Partitioning
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