rdblue commented on a change in pull request #23606: [SPARK-26666][SQL] Support
DSv2 overwrite and dynamic partition overwrite.
URL: https://github.com/apache/spark/pull/23606#discussion_r256637976
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/WriteToDataSourceV2Exec.scala
##########
@@ -41,18 +46,114 @@ case class WriteToDataSourceV2(batchWrite: BatchWrite,
query: LogicalPlan)
override def output: Seq[Attribute] = Nil
}
+case class AppendDataExec(
+ table: SupportsBatchWrite,
+ writeOptions: DataSourceOptions,
+ query: SparkPlan) extends V2TableWriteExec with BatchWriteHelper {
+
+ override protected def doExecute(): RDD[InternalRow] = {
+ val batchWrite = newWriteBuilder() match {
+ case builder: SupportsSaveMode =>
+ builder.mode(SaveMode.Append).buildForBatch()
+
+ case builder =>
+ builder.buildForBatch()
+ }
+ doWrite(batchWrite)
+ }
+}
+
+case class OverwriteByExpressionExec(
+ table: SupportsBatchWrite,
+ filters: Array[Filter],
+ writeOptions: DataSourceOptions,
+ query: SparkPlan) extends V2TableWriteExec with BatchWriteHelper {
+
+ private def isTruncate(filters: Array[Filter]): Boolean = {
+ filters.length == 1 && filters(0).isInstanceOf[AlwaysTrue]
+ }
+
+ override protected def doExecute(): RDD[InternalRow] = {
+ val batchWrite = newWriteBuilder() match {
+ case builder: SupportsTruncate if isTruncate(filters) =>
+ builder.truncate().buildForBatch()
+
+ case builder: SupportsOverwrite =>
+ builder.overwrite(filters).buildForBatch()
+
+ case builder: SupportsSaveMode =>
+ builder.mode(SaveMode.Overwrite).buildForBatch()
Review comment:
Because `SaveMode.Overwrite` always truncates, this should be called only if
the expression is `AlwaysTrue`. I've updated the code.
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