cloud-fan commented on a change in pull request #32495:
URL: https://github.com/apache/spark/pull/32495#discussion_r631825830
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoinExec.scala
##########
@@ -418,115 +428,106 @@ 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)
- ctx.addNewFunction("findNextInnerJoinRows",
+ ctx.addNewFunction("findNextJoinRows",
s"""
- |private boolean findNextInnerJoinRows(
- | scala.collection.Iterator leftIter,
- | scala.collection.Iterator rightIter) {
- | $leftRow = null;
+ |private boolean findNextJoinRows(
+ | scala.collection.Iterator streamedIter,
+ | scala.collection.Iterator bufferedIter) {
+ | $streamedRow = null;
| int comp = 0;
- | while ($leftRow == null) {
- | if (!leftIter.hasNext()) return false;
- | $leftRow = (InternalRow) leftIter.next();
- | ${leftKeyVars.map(_.code).mkString("\n")}
- | if ($leftAnyNull) {
- | $leftRow = null;
+ | while ($streamedRow == null) {
+ | if (!streamedIter.hasNext()) return false;
+ | $streamedRow = (InternalRow) streamedIter.next();
+ | ${streamedKeyVars.map(_.code).mkString("\n")}
+ | if ($streamedAnyNull) {
+ | $streamedRow = null;
| continue;
| }
| if (!$matches.isEmpty()) {
- | ${genComparison(ctx, leftKeyVars, matchedKeyVars)}
+ | ${genComparison(ctx, streamedKeyVars, matchedKeyVars)}
| if (comp == 0) {
| return true;
| }
| $matches.clear();
| }
|
| do {
- | if ($rightRow == null) {
- | if (!rightIter.hasNext()) {
+ | if ($bufferedRow == null) {
+ | if (!bufferedIter.hasNext()) {
| ${matchedKeyVars.map(_.code).mkString("\n")}
| return !$matches.isEmpty();
| }
- | $rightRow = (InternalRow) rightIter.next();
- | ${rightKeyTmpVars.map(_.code).mkString("\n")}
- | if ($rightAnyNull) {
- | $rightRow = null;
+ | $bufferedRow = (InternalRow) bufferedIter.next();
+ | ${bufferedKeyTmpVars.map(_.code).mkString("\n")}
+ | if ($bufferedAnyNull) {
+ | $bufferedRow = null;
| continue;
| }
- | ${rightKeyVars.map(_.code).mkString("\n")}
+ | ${bufferedKeyVars.map(_.code).mkString("\n")}
| }
- | ${genComparison(ctx, leftKeyVars, rightKeyVars)}
+ | ${genComparison(ctx, streamedKeyVars, bufferedKeyVars)}
| if (comp > 0) {
- | $rightRow = null;
+ | $bufferedRow = null;
| } else if (comp < 0) {
| if (!$matches.isEmpty()) {
| ${matchedKeyVars.map(_.code).mkString("\n")}
| return true;
| }
- | $leftRow = null;
+ | $streamedRow = null;
| } else {
- | $matches.add((UnsafeRow) $rightRow);
- | $rightRow = null;
+ | $matches.add((UnsafeRow) $bufferedRow);
+ | $bufferedRow = null;
| }
- | } while ($leftRow != null);
+ | } while ($streamedRow != null);
| }
| return false; // unreachable
|}
""".stripMargin, inlineToOuterClass = true)
Review comment:
If we have multiple SMJ in one whole-stage, will we have multiple
`findNextJoinRows` methods in the outer class and fail the compilation?
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