Github user koertkuipers commented on a diff in the pull request:
https://github.com/apache/spark/pull/23173#discussion_r237716913
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/OutputWriter.scala
---
@@ -57,6 +57,9 @@ abstract class OutputWriterFactory extends Serializable {
* executor side. This instance is used to persist rows to this single
output file.
*/
abstract class OutputWriter {
+ /** Initializes before writing any rows. Invoked on executor size. */
+ def init(): Unit = {}
--- End diff --
do the init logic in the constructor for CsvOutputWriter instead?
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