/**
* 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.tajo.engine.planner.physical;
import org.apache.hadoop.fs.Path;
import org.apache.tajo.LocalTajoTestingUtility;
import org.apache.tajo.TajoTestingCluster;
import org.apache.tajo.algebra.Expr;
import org.apache.tajo.catalog.*;
import org.apache.tajo.catalog.proto.CatalogProtos.StoreType;
import org.apache.tajo.common.TajoDataTypes.Type;
import org.apache.tajo.conf.TajoConf;
import org.apache.tajo.datum.Datum;
import org.apache.tajo.datum.DatumFactory;
import org.apache.tajo.engine.parser.SQLAnalyzer;
import org.apache.tajo.engine.planner.*;
import org.apache.tajo.engine.planner.enforce.Enforcer;
import org.apache.tajo.engine.planner.logical.LogicalNode;
import org.apache.tajo.storage.*;
import org.apache.tajo.storage.fragment.FileFragment;
import org.apache.tajo.util.CommonTestingUtil;
import org.apache.tajo.util.TUtil;
import org.apache.tajo.worker.TaskAttemptContext;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import java.io.IOException;
import static org.apache.tajo.TajoConstants.DEFAULT_DATABASE_NAME;
import static org.apache.tajo.TajoConstants.DEFAULT_TABLESPACE_NAME;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
public class TestHashAntiJoinExec {
private TajoConf conf;
private final String TEST_PATH = "target/test-data/TestHashJoinExec";
private TajoTestingCluster util;
private CatalogService catalog;
private SQLAnalyzer analyzer;
private LogicalPlanner planner;
private LogicalOptimizer optimizer;
private AbstractStorageManager sm;
private Path testDir;
private TableDesc employee;
private TableDesc people;
@Before
public void setUp() throws Exception {
util = new TajoTestingCluster();
util.initTestDir();
catalog = util.startCatalogCluster().getCatalog();
testDir = CommonTestingUtil.getTestDir(TEST_PATH);
catalog.createTablespace(DEFAULT_TABLESPACE_NAME, testDir.toUri().toString());
catalog.createDatabase(DEFAULT_DATABASE_NAME, DEFAULT_TABLESPACE_NAME);
conf = util.getConfiguration();
sm = StorageManagerFactory.getStorageManager(conf, testDir);
Schema employeeSchema = new Schema();
employeeSchema.addColumn("managerid", Type.INT4);
employeeSchema.addColumn("empid", Type.INT4);
employeeSchema.addColumn("memid", Type.INT4);
employeeSchema.addColumn("deptname", Type.TEXT);
TableMeta employeeMeta = CatalogUtil.newTableMeta(StoreType.CSV);
Path employeePath = new Path(testDir, "employee.csv");
Appender appender = StorageManagerFactory.getStorageManager(conf).getAppender(employeeMeta, employeeSchema,
employeePath);
appender.init();
Tuple tuple = new VTuple(employeeSchema.size());
for (int i = 0; i < 10; i++) {
tuple.put(new Datum[] {
DatumFactory.createInt4(i),
DatumFactory.createInt4(i), // empid [0-9]
DatumFactory.createInt4(10 + i),
DatumFactory.createText("dept_" + i) });
appender.addTuple(tuple);
}
appender.flush();
appender.close();
employee = CatalogUtil.newTableDesc("default.employee", employeeSchema, employeeMeta, employeePath);
catalog.createTable(employee);
Schema peopleSchema = new Schema();
peopleSchema.addColumn("empid", Type.INT4);
peopleSchema.addColumn("fk_memid", Type.INT4);
peopleSchema.addColumn("name", Type.TEXT);
peopleSchema.addColumn("age", Type.INT4);
TableMeta peopleMeta = CatalogUtil.newTableMeta(StoreType.CSV);
Path peoplePath = new Path(testDir, "people.csv");
appender = StorageManagerFactory.getStorageManager(conf).getAppender(peopleMeta, peopleSchema, peoplePath);
appender.init();
tuple = new VTuple(peopleSchema.size());
for (int i = 1; i < 10; i += 2) {
tuple.put(new Datum[] {
DatumFactory.createInt4(i), // empid [1, 3, 5, 7, 9]
DatumFactory.createInt4(10 + i),
DatumFactory.createText("name_" + i),
DatumFactory.createInt4(30 + i) });
appender.addTuple(tuple);
}
appender.flush();
appender.close();
people = CatalogUtil.newTableDesc("default.people", peopleSchema, peopleMeta, peoplePath);
catalog.createTable(people);
analyzer = new SQLAnalyzer();
planner = new LogicalPlanner(catalog);
optimizer = new LogicalOptimizer(conf);
}
@After
public void tearDown() throws Exception {
util.shutdownCatalogCluster();
}
// relation descriptions
// employee (managerid, empid, memid, deptname)
// people (empid, fk_memid, name, age)
String[] QUERIES = {
"select managerId, e.empId, deptName, e.memId from employee as e, people as p where e.empId = p.empId"
};
@Test
public final void testHashAntiJoin() throws IOException, PlanningException {
FileFragment[] empFrags = StorageManager.splitNG(conf, "default.e", employee.getMeta(), employee.getPath(),
Integer.MAX_VALUE);
FileFragment[] peopleFrags = StorageManager.splitNG(conf, "default.p", people.getMeta(), people.getPath(),
Integer.MAX_VALUE);
FileFragment[] merged = TUtil.concat(empFrags, peopleFrags);
Path workDir = CommonTestingUtil.getTestDir("target/test-data/testHashAntiJoin");
TaskAttemptContext ctx = new TaskAttemptContext(conf,
LocalTajoTestingUtility.newQueryUnitAttemptId(), merged, workDir);
ctx.setEnforcer(new Enforcer());
Expr expr = analyzer.parse(QUERIES[0]);
LogicalPlan plan = planner.createPlan(LocalTajoTestingUtility.createDummySession(), expr);
optimizer.optimize(plan);
LogicalNode rootNode = plan.getRootBlock().getRoot();
PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf, sm);
PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
// replace an equal join with an hash anti join.
if (exec instanceof MergeJoinExec) {
MergeJoinExec join = (MergeJoinExec) exec;
ExternalSortExec sortLeftChild = (ExternalSortExec) join.getLeftChild();
ExternalSortExec sortRightChild = (ExternalSortExec) join.getRightChild();
SeqScanExec scanLeftChild = sortLeftChild.getChild();
SeqScanExec scanRightChild = sortRightChild.getChild();
// 'people' should be outer table. So, the below code guarantees that people becomes the outer table.
if (scanLeftChild.getTableName().equals("default.people")) {
exec = new HashLeftAntiJoinExec(ctx, join.getPlan(), scanRightChild, scanLeftChild);
} else {
exec = new HashLeftAntiJoinExec(ctx, join.getPlan(), scanLeftChild, scanRightChild);
}
} else if (exec instanceof HashJoinExec) {
HashJoinExec join = (HashJoinExec) exec;
SeqScanExec scanLeftChild = (SeqScanExec) join.getLeftChild();
// 'people' should be outer table. So, the below code guarantees that people becomes the outer table.
if (scanLeftChild.getTableName().equals("default.people")) {
exec = new HashLeftAntiJoinExec(ctx, join.getPlan(), join.getRightChild(), join.getLeftChild());
} else {
exec = new HashLeftAntiJoinExec(ctx, join.getPlan(), join.getLeftChild(), join.getRightChild());
}
}
Tuple tuple;
int count = 0;
int i = 0;
exec.init();
while ((tuple = exec.next()) != null) {
count++;
assertTrue(i == tuple.get(0).asInt4());
assertTrue(i == tuple.get(1).asInt4()); // expected empid [0, 2, 4, 6, 8]
assertTrue(("dept_" + i).equals(tuple.get(2).asChars()));
assertTrue(10 + i == tuple.get(3).asInt4());
i += 2;
}
exec.close();
assertEquals(5 , count); // the expected result : [0, 2, 4, 6, 8]
}
}