peter-toth commented on a change in pull request #29572:
URL: https://github.com/apache/spark/pull/29572#discussion_r482753704
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoinExec.scala
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@@ -673,8 +680,9 @@ private[joins] class SortMergeJoinScanner(
*/
private[this] var matchJoinKey: InternalRow = _
/** Buffered rows from the buffered side of the join. This is empty if there
are no matches. */
- private[this] val bufferedMatches =
- new ExternalAppendOnlyUnsafeRowArray(inMemoryThreshold, spillThreshold)
+ private[this] val bufferedMatches: ExternalAppendOnlyUnsafeRowArray =
+ new ExternalAppendOnlyUnsafeRowArray(if (bufferFirstOnly) 1 else
inMemoryThreshold,
Review comment:
There is another call site in existence join:
https://github.com/apache/spark/pull/29572/files#diff-2649ee0724bbc5ee6a64d7de308c527eR336
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