Add missing file

sql/core/src/main/scala/org/apache/spark/sql/execution/ShowMetricsExec.scala

@@ -0,0 +1,42 @@
+/*
+ * 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
+
+import org.apache.spark.rdd.RDD
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.expressions.Attribute
+import org.apache.spark.sql.execution.metric.SQLMetric
+import org.apache.spark.util.AccumulatorContext
+
+case class ShowMetricsExec(label: Option[String], sqlMetrics: Seq[Long], child: SparkPlan)
+  extends UnaryExecNode {
+  override def output: Seq[Attribute] = child.output
+
+  override protected def withNewChildInternal(newChild: SparkPlan): ShowMetricsExec =
+    copy(child = newChild)
+
+  override def nodeName: String = label.getOrElse(super.nodeName)
+
+  override def metrics: Map[String, SQLMetric] =
+    sqlMetrics
+      .flatMap(AccumulatorContext.get)
+      .map(_.asInstanceOf[SQLMetric])
+      .map(metric => (metric.name.get, metric))
+      .toMap
+
+  override protected def doExecute(): RDD[InternalRow] = child.execute()
+}