GitHub user HyukjinKwon opened a pull request:
https://github.com/apache/spark/pull/15329
[SPARK-17763][SQL] JacksonParser silently parses null as 0 when the field
is not nullable
## What changes were proposed in this pull request?
This PR proposes handling not nullable field properly in `JacksonParser`.
For example, the codes below:
```scala
val testJson = """{"nullInt":null}""" :: Nil
val testSchema = StructType(StructField("nullInt", IntegerType, false) ::
Nil)
val data = spark.sparkContext.parallelize(testJson)
spark.read.schema(testSchema).json(data).show()
```
prints
**Before**
```
+-------+
|nullInt|
+-------+
| 0|
+-------+
```
**After**
```
org.apache.spark.sql.catalyst.json.NotAllowedNullException: Null not
allowed: {"nullInt":null}
at
org.apache.spark.sql.catalyst.json.JacksonParser.failedRecord(JacksonParser.scala:131)
at
org.apache.spark.sql.catalyst.json.JacksonParser.parse(JacksonParser.scala:472)
...
```
## How was this patch tested?
Unit test in`JsonSuite`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/HyukjinKwon/spark SPARK-17763
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/15329.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 #15329
----
commit 88241865ac192a04270ab86b1be65f1b29466707
Author: hyukjinkwon <[email protected]>
Date: 2016-10-03T07:49:54Z
JacksonParser silently parses null as 0 when the field is not nullable
----
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