c21 commented on a change in pull request #32528:
URL: https://github.com/apache/spark/pull/32528#discussion_r631690259
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoinExec.scala
##########
@@ -679,60 +704,124 @@ case class SortMergeJoinExec(
(evaluateVariables(streamedVars), "")
}
- val thisPlan = ctx.addReferenceObj("plan", this)
- val eagerCleanup = s"$thisPlan.cleanupResources();"
-
- lazy val innerJoin =
+ val beforeLoop =
s"""
- |while (findNextJoinRows($streamedInput, $bufferedInput)) {
- | ${streamedVarDecl.mkString("\n")}
- | ${beforeLoop.trim}
- | scala.collection.Iterator<UnsafeRow> $iterator =
$matches.generateIterator();
- | while ($iterator.hasNext()) {
- | InternalRow $bufferedRow = (InternalRow) $iterator.next();
- | ${condCheck.trim}
- | $numOutput.add(1);
- | ${consume(ctx, resultVars)}
- | }
- | if (shouldStop()) return;
- |}
- |$eagerCleanup
- """.stripMargin
-
- lazy val outerJoin = {
- val hasOutputRow = ctx.freshName("hasOutputRow")
+ |${streamedVarDecl.mkString("\n")}
+ |${streamedBeforeLoop.trim}
+ |scala.collection.Iterator<UnsafeRow> $iterator =
$matches.generateIterator();
+ """.stripMargin
+ val outputRow =
s"""
- |while ($streamedInput.hasNext()) {
- | findNextJoinRows($streamedInput, $bufferedInput);
- | ${streamedVarDecl.mkString("\n")}
- | ${beforeLoop.trim}
- | scala.collection.Iterator<UnsafeRow> $iterator =
$matches.generateIterator();
- | boolean $hasOutputRow = false;
- |
- | // the last iteration of this loop is to emit an empty row if
there is no matched rows.
- | while ($iterator.hasNext() || !$hasOutputRow) {
- | InternalRow $bufferedRow = $iterator.hasNext() ?
- | (InternalRow) $iterator.next() : null;
- | ${condCheck.trim}
- | $hasOutputRow = true;
- | $numOutput.add(1);
- | ${consume(ctx, resultVars)}
- | }
- | if (shouldStop()) return;
- |}
- |$eagerCleanup
+ |$numOutput.add(1);
+ |${consume(ctx, resultVars)}
""".stripMargin
- }
+ val findNextJoinRows = s"findNextJoinRows($streamedInput, $bufferedInput)"
+ val thisPlan = ctx.addReferenceObj("plan", this)
+ val eagerCleanup = s"$thisPlan.cleanupResources();"
joinType match {
- case _: InnerLike => innerJoin
- case LeftOuter | RightOuter => outerJoin
+ case _: InnerLike =>
+ codegenInner(findNextJoinRows, beforeLoop, iterator, bufferedRow,
condCheck, outputRow,
Review comment:
Actually after double checking, we do not need to do `beforeLoop.trim`
as `beforeLoop` already has `stripMargin`, and has no trailing spaces. Also
updated to avoid repeated `conditionCheck.trim`
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