[jira] [Work logged] (HIVE-24241) Enable SharedWorkOptimizer to merge downstream operators after an optimization step

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-24241?focusedWorklogId=508080&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-508080 ]

ASF GitHub Bot logged work on HIVE-24241:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 05/Nov/20 10:43
            Start Date: 05/Nov/20 10:43
    Worklog Time Spent: 10m 
      Work Description: kgyrtkirk commented on a change in pull request #1562:
URL: https://github.com/apache/hive/pull/1562#discussion_r517954820



##########
File path: ql/src/java/org/apache/hadoop/hive/ql/optimizer/OperatorGraph.java
##########
@@ -0,0 +1,231 @@
+/*
+ * 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.hadoop.hive.ql.optimizer;
+
+import java.io.File;
+import java.io.PrintWriter;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.hadoop.hive.ql.exec.AppMasterEventOperator;
+import org.apache.hadoop.hive.ql.exec.Operator;
+import org.apache.hadoop.hive.ql.exec.ReduceSinkOperator;
+import org.apache.hadoop.hive.ql.exec.TableScanOperator;
+import org.apache.hadoop.hive.ql.optimizer.calcite.rules.HivePointLookupOptimizerRule.DiGraph;
+import org.apache.hadoop.hive.ql.parse.ParseContext;
+import org.apache.hadoop.hive.ql.parse.SemiJoinBranchInfo;
+import org.apache.hadoop.hive.ql.plan.DynamicPruningEventDesc;
+
+import com.google.common.collect.Sets;
+
+public class OperatorGraph {
+
+  /**
+   * A directed graph extended with support to check dag property.
+   */
+  static class DagGraph<V, E> extends DiGraph<V, E> {

Review comment:
       jgrapht has quite a few graph algorithms as well - guava would be a viable candidate if we don't yet have a graph class; but I think it doesn't give much more than that.
   
   I've moved these classes around - let's see how far we can get with these!




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Issue Time Tracking
-------------------

    Worklog Id:     (was: 508080)
    Time Spent: 2h  (was: 1h 50m)

> Enable SharedWorkOptimizer to merge downstream operators after an optimization step
> -----------------------------------------------------------------------------------
>
>                 Key: HIVE-24241
>                 URL: https://issues.apache.org/jira/browse/HIVE-24241
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Zoltan Haindrich
>            Assignee: Zoltan Haindrich
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 2h
>  Remaining Estimate: 0h
>




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