/**
* 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.plan;
import junit.framework.Assert;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.ql.exec.DDLTask;
import org.apache.hadoop.hive.ql.exec.Task;
import org.junit.Test;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Set;
public class TestConditionalResolverCommonJoin {
@Test
public void testResolvingDriverAlias() throws Exception {
ConditionalResolverCommonJoin resolver = new ConditionalResolverCommonJoin();
HashMap<String, ArrayList<String>> pathToAliases = new HashMap<String, ArrayList<String>>();
pathToAliases.put("path1", new ArrayList<String>(Arrays.asList("alias1", "alias2")));
pathToAliases.put("path2", new ArrayList<String>(Arrays.asList("alias3")));
HashMap<String, Long> aliasToKnownSize = new HashMap<String, Long>();
aliasToKnownSize.put("alias1", 1024l);
aliasToKnownSize.put("alias2", 2048l);
aliasToKnownSize.put("alias3", 4096l);
DDLTask task1 = new DDLTask();
task1.setId("alias2");
DDLTask task2 = new DDLTask();
task2.setId("alias3");
// joins alias1, alias2, alias3 (alias1 was not eligible for big pos)
HashMap<Task<? extends Serializable>, Set<String>> taskToAliases =
new HashMap<Task<? extends Serializable>, Set<String>>();
taskToAliases.put(task1, new HashSet<String>(Arrays.asList("alias2")));
taskToAliases.put(task2, new HashSet<String>(Arrays.asList("alias3")));
ConditionalResolverCommonJoin.ConditionalResolverCommonJoinCtx ctx =
new ConditionalResolverCommonJoin.ConditionalResolverCommonJoinCtx();
ctx.setPathToAliases(pathToAliases);
ctx.setTaskToAliases(taskToAliases);
ctx.setAliasToKnownSize(aliasToKnownSize);
HiveConf conf = new HiveConf();
conf.setLongVar(HiveConf.ConfVars.HIVESMALLTABLESFILESIZE, 4096);
// alias3 only can be selected
Task resolved = resolver.resolveMapJoinTask(ctx, conf);
Assert.assertEquals("alias3", resolved.getId());
conf.setLongVar(HiveConf.ConfVars.HIVESMALLTABLESFILESIZE, 65536);
// alias1, alias2, alias3 all can be selected but overriden by biggest one (alias3)
resolved = resolver.resolveMapJoinTask(ctx, conf);
Assert.assertEquals("alias3", resolved.getId());
conf.setLongVar(HiveConf.ConfVars.HIVESMALLTABLESFILESIZE, 2048);
// not selected
resolved = resolver.resolveMapJoinTask(ctx, conf);
Assert.assertNull(resolved);
}
}