GitHub user davies opened a pull request:
https://github.com/apache/spark/pull/13883
[SPARK-16179] [PYSPARK] fix bugs for Python udf in generate
## What changes were proposed in this pull request?
This PR fix the bug when Python UDF is used in explode (generator),
GenerateExec requires that all the attributes in expressions should be
resolvable from children when creating, we should replace the children first,
then replace it's expressions.
## How was this patch tested?
Added regression tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/davies/spark udf_in_generate
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/13883.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 #13883
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commit b9fd4bfb93dea18331987b83336b11f4f1f6e388
Author: Davies Liu <dav...@databricks.com>
Date: 2016-06-24T04:43:35Z
fix udf in generate
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