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Victor Lopez updated SPARK-29575: --------------------------------- Description: I believe this issue was resolved elsewhere (https://issues.apache.org/jira/browse/SPARK-23173), though for Pyspark this bug seems to still be there. The issue appears when using `from_json` to parse a column in a Spark dataframe. It seems like `from_json` ignores whether the schema provided has any `nullable:False` property. {code:java} schema = T.StructType().add(T.StructField('id', T.LongType(), nullable=False)).add(T.StructField('name', T.StringType(), nullable=False)) data = [{'user': str({'name': 'joe', 'id':1})}, {'user': str({'name': 'jane'})}] df = spark.read.json(sc.parallelize(data)) df.withColumn("details", F.from_json("user", schema)).select("details.*").show() {code} was: I believe this issue was resolved elsewhere (https://issues.apache.org/jira/browse/SPARK-23173), though for Pyspark this bug seems to still be there. The issue appears when using `from_json` to parse a column in a Spark dataframe. It seems like `from_json` ignores whether the schema provided has any `nullable:False` property. {code:java} schema = T.StructType().add(T.StructField('id', T.LongType(), nullable=False)).add(T.StructField('name', T.StringType(), nullable=False)) data = [{'user': str({'name': 'joe', 'id':1})}, {'user': str({'name': 'jane'})}] df = spark.read.json(sc.parallelize(data)) df.withColumn("details", F.from_json("user", schema)).select("details.*").show() {code} > from_json can produce nulls for fields which are marked as non-nullable > ----------------------------------------------------------------------- > > Key: SPARK-29575 > URL: https://issues.apache.org/jira/browse/SPARK-29575 > Project: Spark > Issue Type: Bug > Components: PySpark > Affects Versions: 2.4.4 > Reporter: Victor Lopez > Priority: Major > > I believe this issue was resolved elsewhere > (https://issues.apache.org/jira/browse/SPARK-23173), though for Pyspark this > bug seems to still be there. > The issue appears when using `from_json` to parse a column in a Spark > dataframe. It seems like `from_json` ignores whether the schema provided has > any `nullable:False` property. > {code:java} > schema = T.StructType().add(T.StructField('id', T.LongType(), > nullable=False)).add(T.StructField('name', T.StringType(), nullable=False)) > data = [{'user': str({'name': 'joe', 'id':1})}, {'user': str({'name': > 'jane'})}] > df = spark.read.json(sc.parallelize(data)) > df.withColumn("details", F.from_json("user", > schema)).select("details.*").show() > {code} > -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org