Github user HyukjinKwon commented on a diff in the pull request: https://github.com/apache/spark/pull/22954#discussion_r232473643 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/api/r/SQLUtils.scala --- @@ -225,4 +226,25 @@ private[sql] object SQLUtils extends Logging { } sparkSession.sessionState.catalog.listTables(db).map(_.table).toArray } + + /** + * R callable function to read a file in Arrow stream format and create a `RDD` + * using each serialized ArrowRecordBatch as a partition. + */ + def readArrowStreamFromFile( + sparkSession: SparkSession, + filename: String): JavaRDD[Array[Byte]] = { + ArrowConverters.readArrowStreamFromFile(sparkSession.sqlContext, filename) --- End diff -- Hmhmhm .. yea. What I was trying to do is to add SQL related codes called in R from JVM, into here when they are not official APIs in order to avoid, we change the internal APIs within Scala, and it causes R test failure. I was trying to do the similar things within PySpark side.
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