cloud-fan commented on code in PR #53150:
URL: https://github.com/apache/spark/pull/53150#discussion_r2550084041
##########
mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala:
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@@ -1142,4 +1143,66 @@ private[spark] object ReadWriteUtils {
spark.read.parquet(path).as[T].collect()
}
}
+
+ def saveDataFrame(path: String, df: DataFrame): Unit = {
+ if (localSavingModeState.get()) {
+ val filePath = Paths.get(path)
+ Files.createDirectories(filePath.getParent)
+
+ Using.resource(
+ new DataOutputStream(new BufferedOutputStream(new
FileOutputStream(filePath.toFile)))
+ ) { dos =>
+ dos.writeUTF("ARROW") // format
+
+ val schema: StructType = df.schema
+ dos.writeUTF(schema.json)
+
+ val iter = DatasetUtils.toArrowBatchRDD(df, "UTC").toLocalIterator
Review Comment:
does the arrow library provide APIs to write to local file?
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