[jira] [Created] (SPARK-27559) Nullable in a given schema is not respected when reading from parquet

["colin fang (JIRA)" <ji...@apache.org>]

colin fang created SPARK-27559:
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             Summary: Nullable in a given schema is not respected when reading from parquet
                 Key: SPARK-27559
                 URL: https://issues.apache.org/jira/browse/SPARK-27559
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core
    Affects Versions: 2.4.2
            Reporter: colin fang


Even if I specify a schema when reading from parquet, nullable is not reset.

{code:java}
    spark.range(10, numPartitions=1).write.mode('overwrite').parquet('tmp')
    df1 = spark.read.parquet('tmp')
    df1.printSchema()
    # root
    #  |-- id: long (nullable = true)
    df2 = spark.read.schema(StructType([StructField('id', LongType(), False)])).parquet('tmp')
    df2.printSchema()
    # root
    #  |-- x: long (nullable = true)
{code}



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