cloud-fan commented on code in PR #42462:
URL: https://github.com/apache/spark/pull/42462#discussion_r1296693769
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connector/connect/client/jvm/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala:
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@@ -470,6 +470,34 @@ final class DataFrameWriter[T] private[sql] (ds:
Dataset[T]) {
format("csv").save(path)
}
+ /**
+ * Saves the content of the `DataFrame` in XML format at the specified path.
This is equivalent
+ * to:
+ * {{{
+ * format("xml").save(path)
+ * }}}
+ *
+ * Note that writing a XML file from `DataFrame` having a field `ArrayType`
with its element as
+ * `ArrayType` would have an additional nested field for the element. For
example, the
+ * `DataFrame` having a field below,
+ *
+ * {@code fieldA [[data1, data2]]}
Review Comment:
in this example, the outer `fieldA` array only has one element, right? Why
we generate two `<fieldA></fieldA>` pairs?
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