Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/22168#discussion_r211607297
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoinExec.scala
---
@@ -975,8 +979,10 @@ private class SortMergeFullOuterJoinScanner(
private[this] var leftIndex: Int = 0
private[this] var rightIndex: Int = 0
- private[this] val leftMatches: ArrayBuffer[InternalRow] = new
ArrayBuffer[InternalRow]
- private[this] val rightMatches: ArrayBuffer[InternalRow] = new
ArrayBuffer[InternalRow]
--- End diff --
We can remove `scala.collection.mutable.ArrayBuffer` import now. Seems no
other places use it.
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