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From chunhui-shi <...@git.apache.org>
Subject [GitHub] drill pull request #784: DRILL-5355: Misc. code cleanup
Date Tue, 14 Mar 2017 22:32:32 GMT
Github user chunhui-shi commented on a diff in the pull request:

    https://github.com/apache/drill/pull/784#discussion_r106044402
  
    --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/planner/physical/visitor/PrelVisualizerVisitor.java
---
    @@ -0,0 +1,217 @@
    +/*
    + * 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.drill.exec.planner.physical.visitor;
    +
    +import org.apache.drill.exec.planner.physical.ExchangePrel;
    +import org.apache.drill.exec.planner.physical.JoinPrel;
    +import org.apache.drill.exec.planner.physical.Prel;
    +import org.apache.drill.exec.planner.physical.ProjectPrel;
    +import org.apache.drill.exec.planner.physical.ScanPrel;
    +import org.apache.drill.exec.planner.physical.ScreenPrel;
    +import org.apache.drill.exec.planner.physical.WriterPrel;
    +
    +/**
    + * Debug-time class that prints a PRel tree to the console for
    + * inspection. Insert this into code during development to see
    + * the state of the tree at various points of interest during
    + * the planning process.
    + */
    +
    +public class PrelVisualizerVisitor
    --- End diff --
    
    Would like to see a unit test for this class.


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