GitHub user ueshin opened a pull request:
https://github.com/apache/spark/pull/20306
[SPARK-23054][SQL][PYSPARK][FOLLOWUP] Use sqlType casting when casting
PythonUserDefinedType to String.
## What changes were proposed in this pull request?
This is a follow-up of #20246.
If the UDT in Python doesn't have its corresponding Scala UTD, cast to
string will be the raw string of the internal value, e.g.
`"org.apache.spark.sql.catalyst.expressions.UnsafeArrayData@xxxxxxxx"` if the
internal type is `ArrayType`.
This pr fixes it by using its `sqlType` casting.
## How was this patch tested?
Added a test and existing tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/ueshin/apache-spark issues/SPARK-23054/fup1
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/20306.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 #20306
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commit 74c17353bb6372b123c5aee1b6d58a21de36f99a
Author: Takuya UESHIN <ueshin@...>
Date: 2018-01-18T05:27:10Z
Use sqlType casting when casting PythonUserDefinedType to String.
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