Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/23128#discussion_r237128247
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/metric/SQLShuffleMetricsReporter.scala
---
@@ -0,0 +1,67 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.execution.metric
+
+import org.apache.spark.executor.TempShuffleReadMetrics
+
+/**
+ * A shuffle metrics reporter for SQL exchange operators.
+ * @param tempMetrics [[TempShuffleReadMetrics]] created in TaskContext.
+ * @param metrics All metrics in current SparkPlan. This param should not
empty and
+ * contains all shuffle metrics defined in
[[SQLMetrics.getShuffleReadMetrics]].
+ */
+private[spark] class SQLShuffleMetricsReporter(
+ tempMetrics: TempShuffleReadMetrics,
--- End diff --
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