hililiwei commented on code in PR #5083:
URL: https://github.com/apache/iceberg/pull/5083#discussion_r919595365
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spark/v3.2/spark-extensions/src/main/scala/org/apache/spark/sql/catalyst/analysis/RewriteMergeIntoTable.scala:
##########
@@ -80,91 +82,136 @@ object RewriteMergeIntoTable extends
RewriteRowLevelCommand {
private final val ROW_ID_REF = FieldReference(ROW_ID)
override def apply(plan: LogicalPlan): LogicalPlan = plan resolveOperators {
- case m @ MergeIntoIcebergTable(aliasedTable, source, cond, matchedActions,
notMatchedActions, None)
+ case m @ MergeIntoIcebergTable(aliasedTable, _, _, matchedActions,
notMatchedActions, None)
if m.resolved && m.aligned && matchedActions.isEmpty &&
notMatchedActions.size == 1 =>
EliminateSubqueryAliases(aliasedTable) match {
case r: DataSourceV2Relation =>
- // NOT MATCHED conditions may only refer to columns in source so
they can be pushed down
- val insertAction = notMatchedActions.head.asInstanceOf[InsertAction]
- val filteredSource = insertAction.condition match {
- case Some(insertCond) => Filter(insertCond, source)
- case None => source
+ rewriteMergeIntoTableWithSingleNotMatchedAction(m, r)
+ case v: View =>
+ val relations = v.children.collect { case r: DataSourceV2Relation if
r.table.isInstanceOf[SparkTable] =>
+ r
}
-
- // when there are no MATCHED actions, use a left anti join to remove
any matching rows
- // and switch to using a regular append instead of a row-level merge
- // only unmatched source rows that match the condition are appended
to the table
- val joinPlan = Join(filteredSource, r, LeftAnti, Some(cond),
JoinHint.NONE)
-
- val outputExprs = insertAction.assignments.map(_.value)
- val outputColNames = r.output.map(_.name)
- val outputCols = outputExprs.zip(outputColNames).map { case (expr,
name) =>
- Alias(expr, name)()
+ val icebergTableView = relations.nonEmpty && relations.size == 1
Review Comment:
So, is it enough to just use `relations.nonEmpty`?
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