GitHub user gatorsmile opened a pull request:
https://github.com/apache/spark/pull/16745
[SPARK-19406] [SQL] Fix function to_json to respect user-provided options
### What changes were proposed in this pull request?
Currently, the function `to_json` allows users to provide options for
generating JSON. However, it does not pass it to `JacksonGenerator`. Thus, it
ignores the user-provided options. This PR is to fix it. Below is an example.
```Scala
val df = Seq(Tuple1(Tuple1(java.sql.Timestamp.valueOf("2015-08-26
18:00:00.0")))).toDF("a")
val options = Map("timestampFormat" -> "dd/MM/yyyy HH:mm")
df.select(to_json($"a", options)).show(false)
```
The current output is like
```
+--------------------------------------+
|structtojson(a) |
+--------------------------------------+
|{"_1":"2015-08-26T18:00:00.000-07:00"}|
+--------------------------------------+
```
After the fix, the output is like
```
+-------------------------+
|structtojson(a) |
+-------------------------+
|{"_1":"26/08/2015 18:00"}|
+-------------------------+
```
### How was this patch tested?
Added test cases for both `from_json` and `to_json`
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gatorsmile/spark toJson
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16745.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 #16745
----
commit 99756eb3b19fe430a8981acdd6fb92a7e990f514
Author: gatorsmile <[email protected]>
Date: 2017-01-30T21:38:59Z
fix.
----
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