GitHub user gatorsmile opened a pull request:
https://github.com/apache/spark/pull/10018
[SPARK-12028] [SQL] get_json_object returns an incorrect result when the
value is null literals
When calling `get_json_object` for the following two cases, both results
are `"null"`:
```scala
val tuple: Seq[(String, String)] = ("5", """{"f1": null}""") :: Nil
val df: DataFrame = tuple.toDF("key", "jstring")
val res = df.select(functions.get_json_object($"jstring",
"$.f1")).collect()
```
```scala
val tuple2: Seq[(String, String)] = ("5", """{"f1": "null"}""") :: Nil
val df2: DataFrame = tuple2.toDF("key", "jstring")
val res3 = df2.select(functions.get_json_object($"jstring",
"$.f1")).collect()
```
Fixed the problem and also added a test case.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gatorsmile/spark get_json_object
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/10018.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 #10018
----
commit 06d9eae73e4b40a0451d1d21f7174aacbf05f780
Author: gatorsmile <[email protected]>
Date: 2015-11-27T18:59:31Z
fixed a bug of get_json_object
commit 54edc84f21918c5cb69a0abfc51f680190f27a1f
Author: gatorsmile <[email protected]>
Date: 2015-11-27T19:04:13Z
Merge remote-tracking branch 'upstream/master' into get_json_object
----
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