Github user chenghao-intel commented on a diff in the pull request:
https://github.com/apache/spark/pull/1147#discussion_r15680598
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/joins.scala ---
@@ -37,6 +37,135 @@ case object BuildLeft extends BuildSide
@DeveloperApi
case object BuildRight extends BuildSide
+/**
+ * Constant Value for Binary Join Node
+ */
+object BinaryJoinNode {
+ val SINGLE_NULL_LIST = Seq[Row](null)
+ val EMPTY_NULL_LIST = Seq[Row]()
+}
+
+// TODO If join key was null should be considered as equal? In Hive this
is configurable.
+
+/**
+ * Output the tuples for the matched (with the same join key) join group,
base on the join types,
+ * Both input iterators should be repeatable.
+ */
+trait BinaryRepeatableIteratorNode extends BinaryNode {
+ self: Product =>
+
+ val leftNullRow = new GenericRow(left.output.length)
+ val rightNullRow = new GenericRow(right.output.length)
+
+ val joinedRow = new JoinedRow()
--- End diff --
Thanks for sharing this, understood it now.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
