maropu commented on a change in pull request #32476:
URL: https://github.com/apache/spark/pull/32476#discussion_r628974305
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoinExec.scala
##########
@@ -418,115 +443,140 @@ case class SortMergeJoinExec(
// Inline mutable state since not many join operations in a task
val matches = ctx.addMutableState(clsName, "matches",
v => s"$v = new $clsName($inMemoryThreshold, $spillThreshold);",
forceInline = true)
- // Copy the left keys as class members so they could be used in next
function call.
- val matchedKeyVars = copyKeys(ctx, leftKeyVars)
+ // Copy the streamed keys as class members so they could be used in next
function call.
+ val matchedKeyVars = copyKeys(ctx, streamedKeyVars)
+
+ // Handle the case when streamed rows has any NULL keys.
+ val handleStreamedAnyNull = joinType match {
+ case _: InnerLike =>
+ // Skip streamed row.
+ s"""
+ |$streamedRow = null;
+ |continue;
+ """.stripMargin
+ case LeftOuter | RightOuter =>
+ // Eagerly return streamed row.
+ s"""
+ |if (!$matches.isEmpty()) {
+ | $matches.clear();
+ |}
+ |return false;
+ """.stripMargin
+ case x =>
+ throw new IllegalArgumentException(
+ s"SortMergeJoin.genScanner should not take $x as the JoinType")
+ }
- ctx.addNewFunction("findNextInnerJoinRows",
+ // Handle the case when streamed keys less than buffered keys.
+ val handleStreamedLessThanBuffered = joinType match {
+ case _: InnerLike =>
+ // Skip streamed row.
+ s"$streamedRow = null;"
+ case LeftOuter | RightOuter =>
+ // Eagerly return with streamed row.
+ "return false;"
+ case x =>
+ throw new IllegalArgumentException(
+ s"SortMergeJoin.genScanner should not take $x as the JoinType")
+ }
+
+ ctx.addNewFunction("findNextJoinRows",
s"""
- |private boolean findNextInnerJoinRows(
- | scala.collection.Iterator leftIter,
- | scala.collection.Iterator rightIter) {
- | $leftRow = null;
+ |private boolean findNextJoinRows(
Review comment:
> In the outer case, a return value is not used?
Yes. Otherwise it's very hard to re-use code in findNextJoinRows. I can
further make more change to not return anything for findNextJoinRows in case
it's an outer join. Do we want to do that?
okay, the current one looks fine. Let's just wait for a @cloud-fan comment
here.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For additional commands, e-mail: reviews-h...@spark.apache.org
