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https://issues.apache.org/jira/browse/SPARK-17763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15541825#comment-15541825
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Apache Spark commented on SPARK-17763:
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User 'HyukjinKwon' has created a pull request for this issue:
https://github.com/apache/spark/pull/15329
> JacksonParser silently parses null as 0 when the field is not nullable
> ----------------------------------------------------------------------
>
> Key: SPARK-17763
> URL: https://issues.apache.org/jira/browse/SPARK-17763
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Hyukjin Kwon
>
> It seems {{JacksonParser}} parses the json when the field is not nullable, it
> parses some data as 0 silently. For example,
> {code}
> 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()
> {code}
> shows
> {code}
> +-------+
> |nullInt|
> +-------+
> | 0|
> +-------+
> {code}
> This will also affect {{from_json}} function.
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