Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/16664#discussion_r100229660
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala ---
@@ -218,7 +247,14 @@ final class DataFrameWriter[T] private[sql](ds:
Dataset[T]) {
bucketSpec = getBucketSpec,
options = extraOptions.toMap)
- dataSource.write(mode, df)
+ val destination = source match {
+ case "jdbc" => extraOptions.get(JDBCOptions.JDBC_TABLE_NAME)
+ case _ => extraOptions.get("path")
--- End diff --
Based on my understanding, the extra information we pass to
QueryExecutionListener is like metadata. It is just for helping users
understand the context. I still do not understand why we need to define a
class/trait for it. This extra class/trait looks weird for this goal, unless
you have some applications that are built on this class/trait.
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