GitHub user cloud-fan opened a pull request:
https://github.com/apache/spark/pull/14344
[SPARK-16706][SQL] support java map in encoder
## What changes were proposed in this pull request?
finish the TODO, create a new expression `ExternalMapToCatalyst` to iterate
the map directly.
## How was this patch tested?
new test in `JavaDatasetSuite`
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloud-fan/spark java-map
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/14344.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 #14344
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commit f23549314cd2558fda0f859418ef36e11d9fe9f9
Author: Wenchen Fan <[email protected]>
Date: 2016-07-25T08:50:08Z
support java map in encoder
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