Github user abehm commented on a diff in the pull request: https://github.com/apache/spark/pull/23096#discussion_r235150178 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/QueryPlanningTracker.scala --- @@ -0,0 +1,109 @@ +/* + * 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.catalyst + +import scala.collection.JavaConverters._ + +import org.apache.spark.util.BoundedPriorityQueue + + +/** + * A simple utility for tracking runtime and associated stats in query planning. + * + * There are two separate concepts we track: + * + * 1. Phases: These are broad scope phases in query planning, as listed below, i.e. analysis, + * optimizationm and physical planning (just planning). + * + * 2. Rules: These are the individual Catalyst rules that we track. In addition to time, we also + * track the number of invocations and effective invocations. + */ +object QueryPlanningTracker { + + // Define a list of common phases here. + val PARSING = "parsing" --- End diff -- Why not enum?
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