Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/8953#discussion_r41454596
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/local/HashJoinNode.scala
---
@@ -17,27 +17,23 @@
package org.apache.spark.sql.execution.local
-import org.apache.spark.sql.SQLConf
import org.apache.spark.sql.catalyst.InternalRow
import org.apache.spark.sql.catalyst.expressions._
import org.apache.spark.sql.execution.joins._
-import org.apache.spark.sql.execution.metric.SQLMetrics
/**
+ * A node for inner hash equi-join. [[BinaryHashJoinNode]] and
[[BroadcastHashJoinNode]]
--- End diff --
```
An abstract node for sharing common functionality among different
implementations of
inner hash equi-join, notably [[BinaryHashJoinNode]] and
[[BroadcastHashJoinNode]].
```
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