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https://issues.apache.org/jira/browse/HIVE-22536?focusedWorklogId=360350&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-360350
]
ASF GitHub Bot logged work on HIVE-22536:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 16/Dec/19 16:24
Start Date: 16/Dec/19 16:24
Worklog Time Spent: 10m
Work Description: miklosgergely commented on pull request #866:
HIVE-22536 Improve return path enabling/disabling
URL: https://github.com/apache/hive/pull/866#discussion_r358329853
##########
File path: ql/src/java/org/apache/hadoop/hive/ql/parse/ReturnPathManager.java
##########
@@ -0,0 +1,61 @@
+/*
+ * 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.parse;
+
+import org.apache.hadoop.hive.conf.HiveConf;
+
+/**
+ * This is a temporary class for the time while we are in transition to use
return path only.
+ * It's purpose is to decide if Hive should use return path.
+ */
+public final class ReturnPathManager {
+ private ReturnPathManager() {
+ throw new UnsupportedOperationException("ReturnPathManager should not be
instantiated");
+ }
+
+ private static ThreadLocal<Boolean> useReturnPath = new ThreadLocal<>();
+
+ public static void init(HiveConf conf, ASTNode root) {
+ boolean use = shouldUseReturnPath(conf, root);
+ useReturnPath.set(use);
+ }
+
+ public static boolean shouldUse() {
+ return useReturnPath.get();
+ }
+
+ private static boolean shouldUseReturnPath(HiveConf conf, ASTNode root) {
Review comment:
Ok, so I know now how to remove those usages from HiveTableScan creation,
but what about the rest of the usages?
CalcitePlannerAction.applyPostJoinOrderingTransform and
CalcitePlannerAction.genTableLogicalPlan also relies on the value, can those be
replaced with some hard coded value as well?
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Issue Time Tracking
-------------------
Worklog Id: (was: 360350)
Time Spent: 2h 40m (was: 2.5h)
> Improve return path enabling/disabling
> --------------------------------------
>
> Key: HIVE-22536
> URL: https://issues.apache.org/jira/browse/HIVE-22536
> Project: Hive
> Issue Type: Sub-task
> Components: Hive
> Reporter: Miklos Gergely
> Assignee: Miklos Gergely
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Attachments: HIVE-22536.01.patch, HIVE-22536.02.patch,
> HIVE-22536.03.patch
>
> Time Spent: 2h 40m
> Remaining Estimate: 0h
>
> Instead of having a boolean for hive.cbo.returnpath.hiveop it should be
> on/off/supported. In case of "supported" it should be used for a subset of
> commands which are already verified to be able to work with return path. This
> is a temporary solution for the time while we are developing return path,
> before making it the only way to handle commands.
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