Joseph K. Bradley created SPARK-20528:
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Summary: Add BinaryFileReader and Writer for DataFrames
Key: SPARK-20528
URL: https://issues.apache.org/jira/browse/SPARK-20528
Project: Spark
Issue Type: New Feature
Components: SQL
Affects Versions: 2.2.0
Reporter: Joseph K. Bradley
It would be very useful to have a binary data reader/writer for DataFrames,
presumably called via {{spark.read.binaryFiles}}, etc.
Currently, going through RDDs is annoying since it requires different code
paths for Scala vs Python:
Scala:
{code}
val binaryFilesRDD = sc.binaryFiles("mypath")
val binaryFilesDF = spark.createDataFrame(binaryFilesRDD)
{code}
Python:
{code}
binaryFilesRDD = sc.binaryFiles("mypath")
binaryFilesRDD_recast = binaryFilesRDD.map(lambda x: (x[0], bytearray(x[1])))
binaryFilesDF = spark.createDataFrame(binaryFilesRDD_recast)
{code}
This is because Scala and Python {{sc.binaryFiles}} return different types,
which makes sense in RDD land but not DataFrame land.
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