Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/14279#discussion_r74891800
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/csv/CSVRelation.scala
---
@@ -188,6 +189,30 @@ private[sql] class CsvOutputWriter(
// create the Generator without separator inserted between 2 records
private[this] val text = new Text()
+ // A `ValueConverter` is responsible for converting a field of an
`InternalRow` to `String`.
--- End diff --
can you document the behavior when a value is null? if a value is null the
value converters are not called right?
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