cloud-fan commented on code in PR #44119:
URL: https://github.com/apache/spark/pull/44119#discussion_r1429683995
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sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriterV2.scala:
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@@ -36,7 +37,7 @@ import org.apache.spark.sql.types.IntegerType
*/
@Experimental
final class DataFrameWriterV2[T] private[sql](table: String, ds: Dataset[T])
- extends CreateTableWriter[T] {
+ extends CreateTableWriter[T] with MergeIntoWriter[T] {
Review Comment:
is there anything shared with existing `DataFrameWriterV2` functions? If not
maybe we can just add a new concrete class `MergeIntoWriter`
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