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From hyun...@apache.org
Subject [38/51] [partial] tajo git commit: TAJO-1761: Separate an integration unit test kit into an independent module.
Date Fri, 14 Aug 2015 14:30:17 GMT
http://git-wip-us.apache.org/repos/asf/tajo/blob/a4106883/tajo-core-tests/src/test/java/org/apache/tajo/engine/planner/physical/TestNLJoinExec.java
----------------------------------------------------------------------
diff --git a/tajo-core-tests/src/test/java/org/apache/tajo/engine/planner/physical/TestNLJoinExec.java b/tajo-core-tests/src/test/java/org/apache/tajo/engine/planner/physical/TestNLJoinExec.java
new file mode 100644
index 0000000..d7968fe
--- /dev/null
+++ b/tajo-core-tests/src/test/java/org/apache/tajo/engine/planner/physical/TestNLJoinExec.java
@@ -0,0 +1,208 @@
+/**
+ * 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.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.PhysicalPlanner;
+import org.apache.tajo.engine.planner.PhysicalPlannerImpl;
+import org.apache.tajo.engine.planner.enforce.Enforcer;
+import org.apache.tajo.engine.planner.global.MasterPlan;
+import org.apache.tajo.engine.query.QueryContext;
+import org.apache.tajo.exception.TajoException;
+import org.apache.tajo.plan.LogicalPlanner;
+import org.apache.tajo.plan.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 TestNLJoinExec {
+  private TajoConf conf;
+  private final String TEST_PATH = TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/TestNLJoinExec";
+  private TajoTestingCluster util;
+  private CatalogService catalog;
+  private SQLAnalyzer analyzer;
+  private LogicalPlanner planner;
+  private Path testDir;
+
+  private TableDesc employee;
+  private TableDesc people;
+
+  private MasterPlan masterPlan;
+
+  @Before
+  public void setUp() throws Exception {
+    util = new TajoTestingCluster();
+    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();
+
+    Schema schema = new Schema();
+    schema.addColumn("managerid", Type.INT4);
+    schema.addColumn("empid", Type.INT4);
+    schema.addColumn("memid", Type.INT4);
+    schema.addColumn("deptname", Type.TEXT);
+
+    TableMeta employeeMeta = CatalogUtil.newTableMeta("TEXT");
+    Path employeePath = new Path(testDir, "employee.csv");
+    Appender appender = ((FileTablespace) TablespaceManager.getLocalFs())
+        .getAppender(employeeMeta, schema, employeePath);
+    appender.init();
+    VTuple tuple = new VTuple(schema.size());
+    for (int i = 0; i < 50; i++) {
+      tuple.put(new Datum[] {
+          DatumFactory.createInt4(i),
+          DatumFactory.createInt4(i),
+          DatumFactory.createInt4(10 + i),
+          DatumFactory.createText("dept_" + i)});
+      appender.addTuple(tuple);
+    }
+    appender.flush();
+    appender.close();
+    employee = CatalogUtil.newTableDesc("default.employee", schema, 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("TEXT");
+    Path peoplePath = new Path(testDir, "people.csv");
+    appender = ((FileTablespace) TablespaceManager.getLocalFs())
+        .getAppender(peopleMeta, peopleSchema, peoplePath);
+    appender.init();
+    tuple = new VTuple(peopleSchema.size());
+    for (int i = 1; i < 50; i += 2) {
+      tuple.put(new Datum[] {
+          DatumFactory.createInt4(i),
+          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, TablespaceManager.getInstance());
+
+    masterPlan = new MasterPlan(LocalTajoTestingUtility.newQueryId(), null, null);
+  }
+
+  @After
+  public void tearDown() throws Exception {
+    util.shutdownCatalogCluster();
+  }
+  
+  String[] QUERIES = {
+    "select managerId, e.empId, deptName, e.memId from employee as e, people p",
+    "select managerId, e.empId, deptName, e.memId from employee as e inner join people as p on " +
+        "e.empId = p.empId and e.memId = p.fk_memId"
+  };
+  
+  @Test
+  public final void testNLCrossJoin() throws IOException, TajoException {
+    FileFragment[] empFrags = FileTablespace.splitNG(conf, "default.e", employee.getMeta(),
+        new Path(employee.getUri()), Integer.MAX_VALUE);
+    FileFragment[] peopleFrags = FileTablespace.splitNG(conf, "default.p", people.getMeta(),
+        new Path(people.getUri()), Integer.MAX_VALUE);
+    
+    FileFragment[] merged = TUtil.concat(empFrags, peopleFrags);
+
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testNLCrossJoin");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(), merged, workDir);
+    ctx.setEnforcer(new Enforcer());
+    Expr expr = analyzer.parse(QUERIES[0]);
+    LogicalNode plan = planner.createPlan(LocalTajoTestingUtility.createDummyContext(conf),
+        expr).getRootBlock().getRoot();
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, plan);
+
+    int i = 0;
+    exec.init();
+    while (exec.next() != null) {
+      i++;
+    }
+    exec.close();
+    assertEquals(50*50/2, i); // expected 10 * 5
+  }
+
+  @Test
+  public final void testNLInnerJoin() throws IOException, TajoException {
+    FileFragment[] empFrags = FileTablespace.splitNG(conf, "default.e", employee.getMeta(),
+        new Path(employee.getUri()), Integer.MAX_VALUE);
+    FileFragment[] peopleFrags = FileTablespace.splitNG(conf, "default.p", people.getMeta(),
+        new Path(people.getUri()), Integer.MAX_VALUE);
+    
+    FileFragment[] merged = TUtil.concat(empFrags, peopleFrags);
+
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testNLInnerJoin");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan), merged, workDir);
+    ctx.setEnforcer(new Enforcer());
+    Expr expr =  analyzer.parse(QUERIES[1]);
+    LogicalNode plan = planner.createPlan(LocalTajoTestingUtility.createDummyContext(conf),
+        expr).getRootBlock().getRoot();
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, plan);
+    
+    Tuple tuple;
+    int i = 1;
+    int count = 0;
+    exec.init();
+    while ((tuple = exec.next()) != null) {
+      count++;
+      assertTrue(i == tuple.getInt4(0));
+      assertTrue(i == tuple.getInt4(1));
+      assertTrue(("dept_" + i).equals(tuple.getText(2)));
+      assertTrue(10 + i == tuple.getInt4(3));
+      i += 2;
+    }
+    exec.close();
+    assertEquals(50 / 2, count);
+  }
+}

http://git-wip-us.apache.org/repos/asf/tajo/blob/a4106883/tajo-core-tests/src/test/java/org/apache/tajo/engine/planner/physical/TestPhysicalPlanner.java
----------------------------------------------------------------------
diff --git a/tajo-core-tests/src/test/java/org/apache/tajo/engine/planner/physical/TestPhysicalPlanner.java b/tajo-core-tests/src/test/java/org/apache/tajo/engine/planner/physical/TestPhysicalPlanner.java
new file mode 100644
index 0000000..69b36c5
--- /dev/null
+++ b/tajo-core-tests/src/test/java/org/apache/tajo/engine/planner/physical/TestPhysicalPlanner.java
@@ -0,0 +1,1144 @@
+/**
+ * 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 com.google.common.collect.Lists;
+import com.google.common.collect.Sets;
+import org.apache.hadoop.fs.FileStatus;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.tajo.*;
+import org.apache.tajo.algebra.Expr;
+import org.apache.tajo.catalog.*;
+import org.apache.tajo.catalog.statistics.TableStats;
+import org.apache.tajo.common.TajoDataTypes.Type;
+import org.apache.tajo.conf.TajoConf;
+import org.apache.tajo.conf.TajoConf.ConfVars;
+import org.apache.tajo.datum.Datum;
+import org.apache.tajo.datum.DatumFactory;
+import org.apache.tajo.datum.NullDatum;
+import org.apache.tajo.engine.function.FunctionLoader;
+import org.apache.tajo.engine.parser.SQLAnalyzer;
+import org.apache.tajo.engine.planner.PhysicalPlanner;
+import org.apache.tajo.engine.planner.PhysicalPlannerImpl;
+import org.apache.tajo.engine.planner.enforce.Enforcer;
+import org.apache.tajo.engine.planner.global.DataChannel;
+import org.apache.tajo.engine.planner.global.MasterPlan;
+import org.apache.tajo.engine.query.QueryContext;
+import org.apache.tajo.exception.*;
+import org.apache.tajo.plan.LogicalOptimizer;
+import org.apache.tajo.plan.LogicalPlan;
+import org.apache.tajo.plan.LogicalPlanner;
+import org.apache.tajo.plan.expr.AggregationFunctionCallEval;
+import org.apache.tajo.plan.logical.*;
+import org.apache.tajo.plan.serder.PlanProto.ShuffleType;
+import org.apache.tajo.plan.util.PlannerUtil;
+import org.apache.tajo.session.Session;
+import org.apache.tajo.storage.*;
+import org.apache.tajo.storage.fragment.FileFragment;
+import org.apache.tajo.storage.fragment.Fragment;
+import org.apache.tajo.unit.StorageUnit;
+import org.apache.tajo.util.CommonTestingUtil;
+import org.apache.tajo.util.KeyValueSet;
+import org.apache.tajo.util.TUtil;
+import org.apache.tajo.worker.TaskAttemptContext;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Set;
+
+import static org.apache.tajo.TajoConstants.DEFAULT_DATABASE_NAME;
+import static org.apache.tajo.TajoConstants.DEFAULT_TABLESPACE_NAME;
+import static org.apache.tajo.plan.serder.PlanProto.ColumnPartitionEnforcer.ColumnPartitionAlgorithm;
+import static org.apache.tajo.plan.serder.PlanProto.SortEnforce.SortAlgorithm;
+import static org.junit.Assert.*;
+
+public class TestPhysicalPlanner {
+  private static TajoTestingCluster util;
+  private static TajoConf conf;
+  private static CatalogService catalog;
+  private static SQLAnalyzer analyzer;
+  private static LogicalPlanner planner;
+  private static LogicalOptimizer optimizer;
+  private static FileTablespace sm;
+  private static Path testDir;
+  private static Session session = LocalTajoTestingUtility.createDummySession();
+  private static QueryContext defaultContext;
+
+  private static TableDesc employee = null;
+  private static TableDesc score = null;
+  private static TableDesc largeScore = null;
+
+  private static MasterPlan masterPlan;
+
+  @BeforeClass
+  public static void setUp() throws Exception {
+    util = new TajoTestingCluster();
+
+    util.startCatalogCluster();
+    conf = util.getConfiguration();
+    testDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/TestPhysicalPlanner");
+    sm = TablespaceManager.getLocalFs();
+    catalog = util.getMiniCatalogCluster().getCatalog();
+    catalog.createTablespace(DEFAULT_TABLESPACE_NAME, testDir.toUri().toString());
+    catalog.createDatabase(DEFAULT_DATABASE_NAME, DEFAULT_TABLESPACE_NAME);
+    for (FunctionDesc funcDesc : FunctionLoader.findLegacyFunctions()) {
+      catalog.createFunction(funcDesc);
+    }
+
+    Schema employeeSchema = new Schema();
+    employeeSchema.addColumn("name", Type.TEXT);
+    employeeSchema.addColumn("empid", Type.INT4);
+    employeeSchema.addColumn("deptname", Type.TEXT);
+
+    Schema scoreSchema = new Schema();
+    scoreSchema.addColumn("deptname", Type.TEXT);
+    scoreSchema.addColumn("class", Type.TEXT);
+    scoreSchema.addColumn("score", Type.INT4);
+    scoreSchema.addColumn("nullable", Type.TEXT);
+
+    TableMeta employeeMeta = CatalogUtil.newTableMeta("TEXT");
+
+
+    Path employeePath = new Path(testDir, "employee.csv");
+    Appender appender = sm.getAppender(employeeMeta, employeeSchema, employeePath);
+    appender.init();
+    VTuple tuple = new VTuple(employeeSchema.size());
+    for (int i = 0; i < 100; i++) {
+      tuple.put(new Datum[] {DatumFactory.createText("name_" + i),
+          DatumFactory.createInt4(i), DatumFactory.createText("dept_" + i)});
+      appender.addTuple(tuple);
+    }
+    appender.flush();
+    appender.close();
+
+    employee = new TableDesc(
+        CatalogUtil.buildFQName(DEFAULT_DATABASE_NAME, "employee"), employeeSchema, employeeMeta,
+        employeePath.toUri());
+    catalog.createTable(employee);
+
+    Path scorePath = new Path(testDir, "score");
+    TableMeta scoreMeta = CatalogUtil.newTableMeta("TEXT", new KeyValueSet());
+    appender = sm.getAppender(scoreMeta, scoreSchema, scorePath);
+    appender.init();
+    score = new TableDesc(
+        CatalogUtil.buildFQName(TajoConstants.DEFAULT_DATABASE_NAME, "score"), scoreSchema, scoreMeta,
+        scorePath.toUri());
+    tuple = new VTuple(scoreSchema.size());
+    int m = 0;
+    for (int i = 1; i <= 5; i++) {
+      for (int k = 3; k < 5; k++) {
+        for (int j = 1; j <= 3; j++) {
+          tuple.put(
+              new Datum[] {
+                  DatumFactory.createText("name_" + i), // name_1 ~ 5 (cad: // 5)
+                  DatumFactory.createText(k + "rd"), // 3 or 4rd (cad: 2)
+                  DatumFactory.createInt4(j), // 1 ~ 3
+              m % 3 == 1 ? DatumFactory.createText("one") : NullDatum.get()});
+          appender.addTuple(tuple);
+          m++;
+        }
+      }
+    }
+    appender.flush();
+    appender.close();
+
+    defaultContext = LocalTajoTestingUtility.createDummyContext(conf);
+    catalog.createTable(score);
+    analyzer = new SQLAnalyzer();
+    planner = new LogicalPlanner(catalog, TablespaceManager.getInstance());
+    optimizer = new LogicalOptimizer(conf, catalog);
+    masterPlan = new MasterPlan(LocalTajoTestingUtility.newQueryId(), null, null);
+
+    createLargeScoreTable();
+  }
+
+  public static void createLargeScoreTable() throws IOException, TajoException {
+
+    // Preparing a large table
+    Path scoreLargePath = new Path(testDir, "score_large");
+    CommonTestingUtil.cleanupTestDir(scoreLargePath.toString());
+
+    Schema scoreSchmea = score.getSchema();
+    TableMeta scoreLargeMeta = CatalogUtil.newTableMeta("RAW", new KeyValueSet());
+    Appender appender =  ((FileTablespace) TablespaceManager.getLocalFs())
+        .getAppender(scoreLargeMeta, scoreSchmea, scoreLargePath);
+    appender.enableStats();
+    appender.init();
+    largeScore = new TableDesc(
+        CatalogUtil.buildFQName(TajoConstants.DEFAULT_DATABASE_NAME, "score_large"), scoreSchmea, scoreLargeMeta,
+        scoreLargePath.toUri());
+
+    VTuple tuple = new VTuple(scoreSchmea.size());
+    int m = 0;
+    for (int i = 1; i <= 40000; i++) {
+      for (int k = 3; k < 5; k++) { // |{3,4}| = 2
+        for (int j = 1; j <= 3; j++) { // |{1,2,3}| = 3
+          tuple.put(
+              new Datum[] {
+                  DatumFactory.createText("name_" + i), // name_1 ~ 5 (cad: // 5)
+                  DatumFactory.createText(k + "rd"), // 3 or 4rd (cad: 2)
+                  DatumFactory.createInt4(j), // 1 ~ 3
+                  m % 3 == 1 ? DatumFactory.createText("one") : NullDatum.get()});
+          appender.addTuple(tuple);
+          m++;
+        }
+      }
+    }
+    appender.flush();
+    appender.close();
+    largeScore.setStats(appender.getStats());
+    catalog.createTable(largeScore);
+  }
+
+  @AfterClass
+  public static void tearDown() throws Exception {
+    util.shutdownCatalogCluster();
+  }
+
+  private String[] QUERIES = {
+      "select name, empId, deptName from employee", // 0
+      "select name, empId, e.deptName, manager from employee as e, dept as dp", // 1
+      "select name, empId, e.deptName, manager, score from employee as e, dept, score", // 2
+      "select p.deptName, sum(score) from dept as p, score group by p.deptName having sum(score) > 30", // 3
+      "select p.deptName, score from dept as p, score order by score asc", // 4
+      "select name from employee where empId = 100", // 5
+      "select deptName, class, score from score", // 6
+      "select deptName, class, sum(score), max(score), min(score) from score group by deptName, class", // 7
+      "select count(*), max(score), min(score) from score", // 8
+      "select count(deptName) from score", // 9
+      "select managerId, empId, deptName from employee order by managerId, empId desc", // 10
+      "select deptName, nullable from score group by deptName, nullable", // 11
+      "select 3 < 4 as ineq, 3.5 * 2 as score", // 12
+      "select (1 > 0) and 3 > 1", // 13
+      "select sum(score), max(score), min(score) from score", // 14
+      "select deptname, sum(score), max(score), min(score) from score group by deptname", // 15
+      "select name from employee where empid >= 0", // 16
+  };
+
+  @Test
+  public final void testCreateScanPlan() throws IOException, TajoException {
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.employee", employee.getMeta(),
+        new Path(employee.getUri()), Integer.MAX_VALUE);
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testCreateScanPlan");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[] { frags[0] }, workDir);
+    ctx.setEnforcer(new Enforcer());
+    Expr expr = analyzer.parse(QUERIES[0]);
+    LogicalPlan plan = planner.createPlan(defaultContext, expr);
+    LogicalNode rootNode =plan.getRootBlock().getRoot();
+    optimizer.optimize(plan);
+
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+
+    Tuple tuple;
+    int i = 0;
+    exec.init();
+    while ((tuple = exec.next()) != null) {
+      assertTrue(tuple.contains(0));
+      assertTrue(tuple.contains(1));
+      assertTrue(tuple.contains(2));
+      i++;
+    }
+    exec.close();
+    assertEquals(100, i);
+  }
+
+  @Test
+  public final void testCreateScanWithFilterPlan() throws IOException, TajoException {
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.employee", employee.getMeta(),
+        new Path(employee.getUri()), Integer.MAX_VALUE);
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testCreateScanWithFilterPlan");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[] { frags[0] }, workDir);
+    ctx.setEnforcer(new Enforcer());
+    Expr expr = analyzer.parse(QUERIES[16]);
+    LogicalPlan plan = planner.createPlan(defaultContext, expr);
+    LogicalNode rootNode =plan.getRootBlock().getRoot();
+    optimizer.optimize(plan);
+
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+
+    Tuple tuple;
+    int i = 0;
+    exec.init();
+    while ((tuple = exec.next()) != null) {
+      assertTrue(tuple.contains(0));
+      i++;
+    }
+    exec.close();
+    assertEquals(100, i);
+  }
+
+  @Test
+  public final void testGroupByPlan() throws IOException, TajoException {
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.score", score.getMeta(), new Path(score.getUri()),
+        Integer.MAX_VALUE);
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testGroupByPlan");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[] { frags[0] }, workDir);
+    ctx.setEnforcer(new Enforcer());
+    Expr context = analyzer.parse(QUERIES[7]);
+    LogicalPlan plan = planner.createPlan(defaultContext, context);
+    optimizer.optimize(plan);
+    LogicalNode rootNode = plan.getRootBlock().getRoot();
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+
+    int i = 0;
+    Tuple tuple;
+    exec.init();
+    while ((tuple = exec.next()) != null) {
+      assertEquals(6, tuple.getInt4(2)); // sum
+      assertEquals(3, tuple.getInt4(3)); // max
+      assertEquals(1, tuple.getInt4(4)); // min
+      i++;
+    }
+    exec.close();
+    assertEquals(10, i);
+  }
+
+  @Test
+  public final void testHashGroupByPlanWithALLField() throws IOException, TajoException {
+    // TODO - currently, this query does not use hash-based group operator.
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.score", score.getMeta(), new Path(score.getUri()),
+        Integer.MAX_VALUE);
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + 
+        "/testHashGroupByPlanWithALLField");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[] { frags[0] }, workDir);
+    ctx.setEnforcer(new Enforcer());
+    Expr expr = analyzer.parse(QUERIES[15]);
+    LogicalPlan plan = planner.createPlan(defaultContext, expr);
+    LogicalNode rootNode = optimizer.optimize(plan);
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+
+    int i = 0;
+    Tuple tuple;
+    exec.init();
+    while ((tuple = exec.next()) != null) {
+      assertEquals(12, tuple.getInt4(1)); // sum
+      assertEquals(3, tuple.getInt4(2)); // max
+      assertEquals(1, tuple.getInt4(3)); // min
+      i++;
+    }
+    exec.close();
+    assertEquals(5, i);
+  }
+
+  @Test
+  public final void testSortGroupByPlan() throws IOException, TajoException {
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.score", score.getMeta(), new Path(score.getUri()),
+        Integer.MAX_VALUE);
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testSortGroupByPlan");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[]{frags[0]}, workDir);
+    ctx.setEnforcer(new Enforcer());
+    Expr context = analyzer.parse(QUERIES[7]);
+    LogicalPlan plan = planner.createPlan(defaultContext, context);
+    optimizer.optimize(plan);
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, plan.getRootBlock().getRoot());
+
+    /*HashAggregateExec hashAgg = (HashAggregateExec) exec;
+
+    SeqScanExec scan = (SeqScanExec) hashAgg.getSubOp();
+
+    Column [] grpColumns = hashAgg.getAnnotation().getGroupingColumns();
+    QueryBlock.SortSpec [] specs = new QueryBlock.SortSpec[grpColumns.length];
+    for (int i = 0; i < grpColumns.length; i++) {
+      specs[i] = new QueryBlock.SortSpec(grpColumns[i], true, false);
+    }
+    SortNode annotation = new SortNode(specs);
+    annotation.setInSchema(scan.getSchema());
+    annotation.setOutSchema(scan.getSchema());
+    SortExec sort = new SortExec(annotation, scan);
+    exec = new SortAggregateExec(hashAgg.getAnnotation(), sort);*/
+
+    int i = 0;
+    Tuple tuple;
+    exec.init();
+    while ((tuple = exec.next()) != null) {
+      assertEquals(6, tuple.getInt4(2)); // sum
+      assertEquals(3, tuple.getInt4(3)); // max
+      assertEquals(1, tuple.getInt4(4)); // min
+      i++;
+    }
+    assertEquals(10, i);
+
+    exec.rescan();
+    i = 0;
+    while ((tuple = exec.next()) != null) {
+      assertEquals(6, tuple.getInt4(2)); // sum
+      assertEquals(3, tuple.getInt4(3)); // max
+      assertEquals(1, tuple.getInt4(4)); // min
+      i++;
+    }
+    exec.close();
+    assertEquals(10, i);
+  }
+
+  private String[] CreateTableAsStmts = {
+      "create table grouped1 as select deptName, class, sum(score), max(score), min(score) from score group by deptName, class", // 0
+      "create table grouped2 using rcfile as select deptName, class, sum(score), max(score), min(score) from score group by deptName, class", // 1
+      "create table grouped3 partition by column (dept text,  class text) as select sum(score), max(score), min(score), deptName, class from score group by deptName, class", // 2,
+      "create table score_large_output as select * from score_large", // 4
+      "CREATE TABLE score_part (deptname text, score int4, nullable text) PARTITION BY COLUMN (class text) " +
+          "AS SELECT deptname, score, nullable, class from score_large" // 5
+  };
+
+  @Test
+  public final void testStorePlan() throws IOException, TajoException {
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.score", score.getMeta(), new Path(score.getUri()),
+        Integer.MAX_VALUE);
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testStorePlan");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[] { frags[0] }, workDir);
+    ctx.setEnforcer(new Enforcer());
+    ctx.setOutputPath(new Path(workDir, "grouped1"));
+
+    Expr context = analyzer.parse(CreateTableAsStmts[0]);
+    LogicalPlan plan = planner.createPlan(defaultContext, context);
+    LogicalNode rootNode = optimizer.optimize(plan);
+
+    TableMeta outputMeta = CatalogUtil.newTableMeta("TEXT");
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+    exec.init();
+    exec.next();
+    exec.close();
+
+    Scanner scanner =  ((FileTablespace) TablespaceManager.getLocalFs())
+        .getFileScanner(outputMeta, rootNode.getOutSchema(), ctx.getOutputPath());
+    scanner.init();
+    Tuple tuple;
+    int i = 0;
+    while ((tuple = scanner.next()) != null) {
+      assertEquals(6, tuple.getInt4(2)); // sum
+      assertEquals(3, tuple.getInt4(3)); // max
+      assertEquals(1, tuple.getInt4(4)); // min
+      i++;
+    }
+    assertEquals(10, i);
+    scanner.close();
+
+    // Examine the statistics information
+    assertEquals(10, ctx.getResultStats().getNumRows().longValue());
+  }
+
+  @Test
+  public final void testStorePlanWithMaxOutputFileSize() throws IOException, TajoException,
+      CloneNotSupportedException {
+
+    TableStats stats = largeScore.getStats();
+    assertTrue("Checking meaningfulness of test", stats.getNumBytes() > StorageUnit.MB);
+
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.score_large", largeScore.getMeta(),
+        new Path(largeScore.getUri()), Integer.MAX_VALUE);
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testStorePlanWithMaxOutputFileSize");
+
+    QueryContext queryContext = new QueryContext(conf, session);
+    queryContext.setInt(SessionVars.MAX_OUTPUT_FILE_SIZE, 1);
+
+    TaskAttemptContext ctx = new TaskAttemptContext(
+        queryContext,
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[] { frags[0] }, workDir);
+    ctx.setEnforcer(new Enforcer());
+    ctx.setOutputPath(new Path(workDir, "maxOutput"));
+
+    Expr context = analyzer.parse(CreateTableAsStmts[3]);
+
+    LogicalPlan plan = planner.createPlan(queryContext, context);
+    LogicalNode rootNode = optimizer.optimize(plan);
+
+    // executing StoreTableExec
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+    exec.init();
+    exec.next();
+    exec.close();
+
+    // checking the number of punctuated files
+    int expectedFileNum = (int) (stats.getNumBytes() / (float) StorageUnit.MB);
+    FileSystem fs = ctx.getOutputPath().getFileSystem(conf);
+    FileStatus [] statuses = fs.listStatus(ctx.getOutputPath().getParent());
+    assertEquals(expectedFileNum, statuses.length);
+
+    // checking the file contents
+    long totalNum = 0;
+    for (FileStatus status : fs.listStatus(ctx.getOutputPath().getParent())) {
+      Scanner scanner =  ((FileTablespace) TablespaceManager.getLocalFs()).getFileScanner(
+          CatalogUtil.newTableMeta("TEXT"),
+          rootNode.getOutSchema(),
+          status.getPath());
+
+      scanner.init();
+      while ((scanner.next()) != null) {
+        totalNum++;
+      }
+      scanner.close();
+    }
+    assertTrue(totalNum == ctx.getResultStats().getNumRows());
+  }
+
+  @Test
+  public final void testStorePlanWithRCFile() throws IOException, TajoException {
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.score", score.getMeta(), new Path(score.getUri()),
+        Integer.MAX_VALUE);
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testStorePlanWithRCFile");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[] { frags[0] }, workDir);
+    ctx.setEnforcer(new Enforcer());
+    ctx.setOutputPath(new Path(workDir, "grouped2"));
+
+    Expr context = analyzer.parse(CreateTableAsStmts[1]);
+    LogicalPlan plan = planner.createPlan(defaultContext, context);
+    LogicalNode rootNode = optimizer.optimize(plan);
+
+    TableMeta outputMeta = CatalogUtil.newTableMeta("RCFILE");
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+    exec.init();
+    exec.next();
+    exec.close();
+
+    Scanner scanner = ((FileTablespace) TablespaceManager.getLocalFs()).getFileScanner(
+        outputMeta, rootNode.getOutSchema(), ctx.getOutputPath());
+    scanner.init();
+    Tuple tuple;
+    int i = 0;
+    while ((tuple = scanner.next()) != null) {
+      assertEquals(6, tuple.getInt4(2)); // sum
+      assertEquals(3, tuple.getInt4(3)); // max
+      assertEquals(1, tuple.getInt4(4)); // min
+      i++;
+    }
+    assertEquals(10, i);
+    scanner.close();
+
+    // Examine the statistics information
+    assertEquals(10, ctx.getResultStats().getNumRows().longValue());
+  }
+
+  @Test
+  public final void testEnforceForDefaultColumnPartitionStorePlan() throws IOException, TajoException {
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.score", score.getMeta(), new Path(score.getUri()),
+        Integer.MAX_VALUE);
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testStorePlan");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[] { frags[0] }, workDir);
+    ctx.setEnforcer(new Enforcer());
+    ctx.setOutputPath(new Path(workDir, "grouped3"));
+
+    Expr context = analyzer.parse(CreateTableAsStmts[2]);
+    LogicalPlan plan = planner.createPlan(defaultContext, context);
+    LogicalNode rootNode = optimizer.optimize(plan);
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+    assertTrue(exec instanceof SortBasedColPartitionStoreExec);
+  }
+
+  @Test
+  public final void testEnforceForHashBasedColumnPartitionStorePlan() throws IOException, TajoException {
+
+    Expr context = analyzer.parse(CreateTableAsStmts[2]);
+    LogicalPlan plan = planner.createPlan(defaultContext, context);
+    LogicalRootNode rootNode = (LogicalRootNode) optimizer.optimize(plan);
+    CreateTableNode createTableNode = rootNode.getChild();
+    Enforcer enforcer = new Enforcer();
+    enforcer.enforceColumnPartitionAlgorithm(createTableNode.getPID(), ColumnPartitionAlgorithm.HASH_PARTITION);
+
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.score", score.getMeta(), new Path(score.getUri()),
+        Integer.MAX_VALUE);
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testStorePlan");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[] { frags[0] }, workDir);
+    ctx.setEnforcer(enforcer);
+    ctx.setOutputPath(new Path(workDir, "grouped4"));
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+    assertTrue(exec instanceof HashBasedColPartitionStoreExec);
+  }
+
+  @Test
+  public final void testEnforceForSortBasedColumnPartitionStorePlan() throws IOException, TajoException {
+
+    Expr context = analyzer.parse(CreateTableAsStmts[2]);
+    LogicalPlan plan = planner.createPlan(defaultContext, context);
+    LogicalRootNode rootNode = (LogicalRootNode) optimizer.optimize(plan);
+    CreateTableNode createTableNode = rootNode.getChild();
+    Enforcer enforcer = new Enforcer();
+    enforcer.enforceColumnPartitionAlgorithm(createTableNode.getPID(), ColumnPartitionAlgorithm.SORT_PARTITION);
+
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.score", score.getMeta(), new Path(score.getUri()),
+        Integer.MAX_VALUE);
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testStorePlan");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[] { frags[0] }, workDir);
+    ctx.setEnforcer(enforcer);
+    ctx.setOutputPath(new Path(workDir, "grouped5"));
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+    assertTrue(exec instanceof SortBasedColPartitionStoreExec);
+  }
+
+  @Test
+  public final void testPartitionedStorePlan() throws IOException, TajoException {
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.score", score.getMeta(), new Path(score.getUri()),
+        Integer.MAX_VALUE);
+    TaskAttemptId id = LocalTajoTestingUtility.newTaskAttemptId(masterPlan);
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf), id, new FileFragment[] { frags[0] },
+        CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testPartitionedStorePlan"));
+    ctx.setEnforcer(new Enforcer());
+    Expr context = analyzer.parse(QUERIES[7]);
+    LogicalPlan plan = planner.createPlan(defaultContext, context);
+
+    int numPartitions = 3;
+    Column key1 = new Column("default.score.deptname", Type.TEXT);
+    Column key2 = new Column("default.score.class", Type.TEXT);
+    DataChannel dataChannel = new DataChannel(masterPlan.newExecutionBlockId(), masterPlan.newExecutionBlockId(),
+        ShuffleType.HASH_SHUFFLE, numPartitions);
+    dataChannel.setShuffleKeys(new Column[]{key1, key2});
+    ctx.setDataChannel(dataChannel);
+    LogicalNode rootNode = optimizer.optimize(plan);
+
+    TableMeta outputMeta = CatalogUtil.newTableMeta(dataChannel.getStoreType());
+
+    FileSystem fs = sm.getFileSystem();
+    QueryId queryId = id.getTaskId().getExecutionBlockId().getQueryId();
+    ExecutionBlockId ebId = id.getTaskId().getExecutionBlockId();
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+    exec.init();
+    exec.next();
+    exec.close();
+    ctx.getHashShuffleAppenderManager().close(ebId);
+
+    String executionBlockBaseDir = queryId.toString() + "/output" + "/" + ebId.getId() + "/hash-shuffle";
+    Path queryLocalTmpDir = new Path(conf.getVar(ConfVars.WORKER_TEMPORAL_DIR) + "/" + executionBlockBaseDir);
+    FileStatus [] list = fs.listStatus(queryLocalTmpDir);
+
+    List<Fragment> fragments = new ArrayList<Fragment>();
+    for (FileStatus status : list) {
+      assertTrue(status.isDirectory());
+      FileStatus [] files = fs.listStatus(status.getPath());
+      for (FileStatus eachFile: files) {
+        fragments.add(new FileFragment("partition", eachFile.getPath(), 0, eachFile.getLen()));
+      }
+    }
+
+    assertEquals(numPartitions, fragments.size());
+    Scanner scanner = new MergeScanner(conf, rootNode.getOutSchema(), outputMeta, TUtil.newList(fragments));
+    scanner.init();
+
+    Tuple tuple;
+    int i = 0;
+    while ((tuple = scanner.next()) != null) {
+      assertEquals(6, tuple.getInt4(2)); // sum
+      assertEquals(3, tuple.getInt4(3)); // max
+      assertEquals(1, tuple.getInt4(4)); // min
+      i++;
+    }
+    assertEquals(10, i);
+    scanner.close();
+
+    // Examine the statistics information
+    assertEquals(10, ctx.getResultStats().getNumRows().longValue());
+
+    fs.delete(queryLocalTmpDir, true);
+  }
+
+  @Test
+  public final void testPartitionedStorePlanWithMaxFileSize() throws IOException, TajoException {
+
+    // Preparing working dir and input fragments
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.score_large", largeScore.getMeta(),
+        new Path(largeScore.getUri()), Integer.MAX_VALUE);
+    TaskAttemptId id = LocalTajoTestingUtility.newTaskAttemptId(masterPlan);
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testPartitionedStorePlanWithMaxFileSize");
+
+    // Setting session variables
+    QueryContext queryContext = new QueryContext(conf, session);
+    queryContext.setInt(SessionVars.MAX_OUTPUT_FILE_SIZE, 1);
+
+    // Preparing task context
+    TaskAttemptContext ctx = new TaskAttemptContext(queryContext, id, new FileFragment[] { frags[0] }, workDir);
+    ctx.setOutputPath(new Path(workDir, "part-01-000000"));
+    // SortBasedColumnPartitionStoreExec will be chosen by default.
+    ctx.setEnforcer(new Enforcer());
+    Expr context = analyzer.parse(CreateTableAsStmts[4]);
+    LogicalPlan plan = planner.createPlan(queryContext, context);
+    LogicalNode rootNode = optimizer.optimize(plan);
+
+    // Executing CREATE TABLE PARTITION BY
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+    exec.init();
+    exec.next();
+    exec.close();
+
+    FileSystem fs = sm.getFileSystem();
+    FileStatus [] list = fs.listStatus(workDir);
+    // checking the number of partitions
+    assertEquals(2, list.length);
+
+    List<Fragment> fragments = Lists.newArrayList();
+    int i = 0;
+    for (FileStatus status : list) {
+      assertTrue(status.isDirectory());
+
+      long fileVolumSum = 0;
+      FileStatus [] fileStatuses = fs.listStatus(status.getPath());
+      for (FileStatus fileStatus : fileStatuses) {
+        fileVolumSum += fileStatus.getLen();
+        fragments.add(new FileFragment("partition", fileStatus.getPath(), 0, fileStatus.getLen()));
+      }
+      assertTrue("checking the meaningfulness of test", fileVolumSum > StorageUnit.MB && fileStatuses.length > 1);
+
+      long expectedFileNum = (long) Math.ceil(fileVolumSum / (float)StorageUnit.MB);
+      assertEquals(expectedFileNum, fileStatuses.length);
+    }
+    TableMeta outputMeta = CatalogUtil.newTableMeta("TEXT");
+    Scanner scanner = new MergeScanner(conf, rootNode.getOutSchema(), outputMeta, TUtil.newList(fragments));
+    scanner.init();
+
+    long rowNum = 0;
+    while (scanner.next() != null) {
+      rowNum++;
+    }
+
+    // checking the number of all written rows
+    assertTrue(largeScore.getStats().getNumRows() == rowNum);
+
+    scanner.close();
+  }
+
+  @Test
+  public final void testPartitionedStorePlanWithEmptyGroupingSet()
+      throws IOException, TajoException {
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.score", score.getMeta(), new Path(score.getUri()),
+        Integer.MAX_VALUE);
+    TaskAttemptId id = LocalTajoTestingUtility.newTaskAttemptId(masterPlan);
+
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + 
+        "/testPartitionedStorePlanWithEmptyGroupingSet");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        id, new FileFragment[] { frags[0] }, workDir);
+    ctx.setEnforcer(new Enforcer());
+    Expr expr = analyzer.parse(QUERIES[14]);
+    LogicalPlan plan = planner.createPlan(defaultContext, expr);
+    LogicalNode rootNode = plan.getRootBlock().getRoot();
+    int numPartitions = 1;
+    DataChannel dataChannel = new DataChannel(masterPlan.newExecutionBlockId(), masterPlan.newExecutionBlockId(),
+        ShuffleType.HASH_SHUFFLE, numPartitions);
+    dataChannel.setShuffleKeys(new Column[]{});
+    ctx.setDataChannel(dataChannel);
+    optimizer.optimize(plan);
+
+    TableMeta outputMeta = CatalogUtil.newTableMeta(dataChannel.getStoreType());
+
+    FileSystem fs = sm.getFileSystem();
+    QueryId queryId = id.getTaskId().getExecutionBlockId().getQueryId();
+    ExecutionBlockId ebId = id.getTaskId().getExecutionBlockId();
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+    exec.init();
+    exec.next();
+    exec.close();
+    ctx.getHashShuffleAppenderManager().close(ebId);
+
+    String executionBlockBaseDir = queryId.toString() + "/output" + "/" + ebId.getId() + "/hash-shuffle";
+    Path queryLocalTmpDir = new Path(conf.getVar(ConfVars.WORKER_TEMPORAL_DIR) + "/" + executionBlockBaseDir);
+    FileStatus [] list = fs.listStatus(queryLocalTmpDir);
+
+    List<Fragment> fragments = new ArrayList<Fragment>();
+    for (FileStatus status : list) {
+      assertTrue(status.isDirectory());
+      FileStatus [] files = fs.listStatus(status.getPath());
+      for (FileStatus eachFile: files) {
+        fragments.add(new FileFragment("partition", eachFile.getPath(), 0, eachFile.getLen()));
+      }
+    }
+
+    assertEquals(numPartitions, fragments.size());
+
+    Scanner scanner = new MergeScanner(conf, rootNode.getOutSchema(), outputMeta, TUtil.newList(fragments));
+    scanner.init();
+    Tuple tuple;
+    int i = 0;
+    while ((tuple = scanner.next()) != null) {
+      assertEquals(60, tuple.getInt4(0)); // sum
+      assertEquals(3, tuple.getInt4(1)); // max
+      assertEquals(1, tuple.getInt4(2)); // min
+      i++;
+    }
+    assertEquals(1, i);
+    scanner.close();
+
+    // Examine the statistics information
+    assertEquals(1, ctx.getResultStats().getNumRows().longValue());
+    fs.delete(queryLocalTmpDir, true);
+  }
+
+  @Test
+  public final void testAggregationFunction() throws IOException, TajoException {
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.score", score.getMeta(), new Path(score.getUri()),
+        Integer.MAX_VALUE);
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testAggregationFunction");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[] { frags[0] }, workDir);
+    ctx.setEnforcer(new Enforcer());
+    Expr context = analyzer.parse(QUERIES[8]);
+    LogicalPlan plan = planner.createPlan(defaultContext, context);
+    LogicalNode rootNode = optimizer.optimize(plan);
+
+    // Set all aggregation functions to the first phase mode
+    GroupbyNode groupbyNode = PlannerUtil.findTopNode(rootNode, NodeType.GROUP_BY);
+    for (AggregationFunctionCallEval function : groupbyNode.getAggFunctions()) {
+      function.setFirstPhase();
+    }
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+
+    exec.init();
+    Tuple tuple = exec.next();
+    assertEquals(30, tuple.getInt8(0));
+    assertEquals(3, tuple.getInt4(1));
+    assertEquals(1, tuple.getInt4(2));
+    assertNull(exec.next());
+    exec.close();
+  }
+
+  @Test
+  public final void testCountFunction() throws IOException, TajoException {
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.score", score.getMeta(), new Path(score.getUri()),
+        Integer.MAX_VALUE);
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testCountFunction");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[] { frags[0] }, workDir);
+    ctx.setEnforcer(new Enforcer());
+    Expr context = analyzer.parse(QUERIES[9]);
+    LogicalPlan plan = planner.createPlan(defaultContext, context);
+    LogicalNode rootNode = optimizer.optimize(plan);
+
+    // Set all aggregation functions to the first phase mode
+    GroupbyNode groupbyNode = PlannerUtil.findTopNode(rootNode, NodeType.GROUP_BY);
+    for (AggregationFunctionCallEval function : groupbyNode.getAggFunctions()) {
+      function.setFirstPhase();
+    }
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+    exec.init();
+    Tuple tuple = exec.next();
+    assertEquals(30, tuple.getInt8(0));
+    assertNull(exec.next());
+    exec.close();
+  }
+
+  @Test
+  public final void testGroupByWithNullValue() throws IOException, TajoException {
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.score", score.getMeta(), new Path(score.getUri()),
+        Integer.MAX_VALUE);
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testGroupByWithNullValue");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[] { frags[0] }, workDir);
+    ctx.setEnforcer(new Enforcer());
+    Expr context = analyzer.parse(QUERIES[11]);
+    LogicalPlan plan = planner.createPlan(defaultContext, context);
+    LogicalNode rootNode = optimizer.optimize(plan);
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+
+    int count = 0;
+    exec.init();
+    while(exec.next() != null) {
+      count++;
+    }
+    exec.close();
+    assertEquals(10, count);
+  }
+
+  @Test
+  public final void testUnionPlan() throws IOException, TajoException, CloneNotSupportedException {
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.employee", employee.getMeta(),
+        new Path(employee.getUri()), Integer.MAX_VALUE);
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testUnionPlan");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[] { frags[0] }, workDir);
+    ctx.setEnforcer(new Enforcer());
+    Expr  context = analyzer.parse(QUERIES[0]);
+    LogicalPlan plan = planner.createPlan(defaultContext, context);
+    LogicalNode rootNode = optimizer.optimize(plan);
+    LogicalRootNode root = (LogicalRootNode) rootNode;
+    UnionNode union = plan.createNode(UnionNode.class);
+    union.setLeftChild((LogicalNode) root.getChild().clone());
+    union.setRightChild((LogicalNode) root.getChild().clone());
+    root.setChild(union);
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, root);
+
+    int count = 0;
+    exec.init();
+    while(exec.next() != null) {
+      count++;
+    }
+    exec.close();
+    assertEquals(200, count);
+  }
+
+  @Test
+  public final void testEvalExpr() throws IOException, TajoException {
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testEvalExpr");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[] { }, workDir);
+    Expr expr = analyzer.parse(QUERIES[12]);
+    LogicalPlan plan = planner.createPlan(defaultContext, expr);
+    LogicalNode rootNode = optimizer.optimize(plan);
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+    Tuple tuple;
+    exec.init();
+    tuple = exec.next();
+    exec.close();
+    assertEquals(true, tuple.getBool(0));
+    assertTrue(7.0d == tuple.getFloat8(1));
+
+    expr = analyzer.parse(QUERIES[13]);
+    plan = planner.createPlan(defaultContext, expr);
+    rootNode = optimizer.optimize(plan);
+
+    phyPlanner = new PhysicalPlannerImpl(conf);
+    exec = phyPlanner.createPlan(ctx, rootNode);
+    exec.init();
+    tuple = exec.next();
+    exec.close();
+    assertEquals(DatumFactory.createBool(true), tuple.asDatum(0));
+  }
+
+  public final String [] createIndexStmt = {
+      "create index idx_employee on employee using TWO_LEVEL_BIN_TREE (name null first, empId desc)"
+  };
+
+  @Test
+  public final void testCreateIndex() throws IOException, TajoException {
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.employee", employee.getMeta(),
+        new Path(employee.getUri()), Integer.MAX_VALUE);
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testCreateIndex");
+    Path indexPath = StorageUtil.concatPath(TajoConf.getWarehouseDir(conf), "default/idx_employee");
+    if (sm.getFileSystem().exists(indexPath)) {
+      sm.getFileSystem().delete(indexPath, true);
+    }
+
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[] {frags[0]}, workDir);
+    ctx.setEnforcer(new Enforcer());
+    Expr context = analyzer.parse(createIndexStmt[0]);
+    LogicalPlan plan = planner.createPlan(defaultContext, context);
+    LogicalNode rootNode = optimizer.optimize(plan);
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+    exec.init();
+    while (exec.next() != null) {
+    }
+    exec.close();
+
+    FileStatus[] list = sm.getFileSystem().listStatus(indexPath);
+    assertEquals(2, list.length);
+  }
+
+  final static String [] duplicateElimination = {
+      "select distinct deptname from score",
+  };
+
+  @Test
+  public final void testDuplicateEliminate() throws IOException, TajoException {
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.score", score.getMeta(),
+        new Path(score.getUri()), Integer.MAX_VALUE);
+
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testDuplicateEliminate");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[] {frags[0]}, workDir);
+    ctx.setEnforcer(new Enforcer());
+    Expr expr = analyzer.parse(duplicateElimination[0]);
+    LogicalPlan plan = planner.createPlan(defaultContext, expr);
+    LogicalNode rootNode = optimizer.optimize(plan);
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+    Tuple tuple;
+
+    int cnt = 0;
+    Set<String> expected = Sets.newHashSet(
+        "name_1", "name_2", "name_3", "name_4", "name_5");
+    exec.init();
+    while ((tuple = exec.next()) != null) {
+      assertTrue(expected.contains(tuple.getText(0)));
+      cnt++;
+    }
+    exec.close();
+    assertEquals(5, cnt);
+  }
+
+  public String [] SORT_QUERY = {
+      "select name, empId from employee order by empId"
+  };
+
+  @Test
+  public final void testSortEnforcer() throws IOException, TajoException {
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.employee", employee.getMeta(),
+        new Path(employee.getUri()), Integer.MAX_VALUE);
+
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testSortEnforcer");
+    Expr context = analyzer.parse(SORT_QUERY[0]);
+    LogicalPlan plan = planner.createPlan(defaultContext, context);
+    optimizer.optimize(plan);
+    LogicalNode rootNode = plan.getRootBlock().getRoot();
+
+    SortNode sortNode = PlannerUtil.findTopNode(rootNode, NodeType.SORT);
+
+    Enforcer enforcer = new Enforcer();
+    enforcer.enforceSortAlgorithm(sortNode.getPID(), SortAlgorithm.IN_MEMORY_SORT);
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[] {frags[0]}, workDir);
+    ctx.setEnforcer(enforcer);
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+    exec.init();
+    exec.next();
+    exec.close();
+
+    assertTrue(exec instanceof MemSortExec);
+
+    context = analyzer.parse(SORT_QUERY[0]);
+    plan = planner.createPlan(defaultContext, context);
+    optimizer.optimize(plan);
+    rootNode = plan.getRootBlock().getRoot();
+
+    sortNode = PlannerUtil.findTopNode(rootNode, NodeType.SORT);
+
+    enforcer = new Enforcer();
+    enforcer.enforceSortAlgorithm(sortNode.getPID(), SortAlgorithm.MERGE_SORT);
+    ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[] {frags[0]}, workDir);
+    ctx.setEnforcer(enforcer);
+
+    phyPlanner = new PhysicalPlannerImpl(conf);
+    exec = phyPlanner.createPlan(ctx, rootNode);
+    exec.init();
+    exec.next();
+    exec.close();
+
+    assertTrue(exec instanceof ExternalSortExec);
+  }
+
+  @Test
+  public final void testGroupByEnforcer() throws IOException, TajoException {
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.score", score.getMeta(), new Path(score.getUri()),
+        Integer.MAX_VALUE);
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/testGroupByEnforcer");
+    Expr context = analyzer.parse(QUERIES[7]);
+    LogicalPlan plan = planner.createPlan(defaultContext, context);
+    optimizer.optimize(plan);
+    LogicalNode rootNode = plan.getRootBlock().getRoot();
+
+    GroupbyNode groupByNode = PlannerUtil.findTopNode(rootNode, NodeType.GROUP_BY);
+
+    Enforcer enforcer = new Enforcer();
+    enforcer.enforceHashAggregation(groupByNode.getPID());
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[] {frags[0]}, workDir);
+    ctx.setEnforcer(enforcer);
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+    exec.init();
+    exec.next();
+    exec.close();
+
+    assertNotNull(PhysicalPlanUtil.findExecutor(exec, HashAggregateExec.class));
+
+    context = analyzer.parse(QUERIES[7]);
+    plan = planner.createPlan(defaultContext, context);
+    optimizer.optimize(plan);
+    rootNode = plan.getRootBlock().getRoot();
+
+    groupByNode = PlannerUtil.findTopNode(rootNode, NodeType.GROUP_BY);
+
+    enforcer = new Enforcer();
+    enforcer.enforceSortAggregation(groupByNode.getPID(), null);
+    ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(masterPlan),
+        new FileFragment[] {frags[0]}, workDir);
+    ctx.setEnforcer(enforcer);
+
+    phyPlanner = new PhysicalPlannerImpl(conf);
+    exec = phyPlanner.createPlan(ctx, rootNode);
+    exec.init();
+    exec.next();
+    exec.close();
+
+    assertTrue(exec instanceof SortAggregateExec);
+  }
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/tajo/blob/a4106883/tajo-core-tests/src/test/java/org/apache/tajo/engine/planner/physical/TestProgressExternalSortExec.java
----------------------------------------------------------------------
diff --git a/tajo-core-tests/src/test/java/org/apache/tajo/engine/planner/physical/TestProgressExternalSortExec.java b/tajo-core-tests/src/test/java/org/apache/tajo/engine/planner/physical/TestProgressExternalSortExec.java
new file mode 100644
index 0000000..d79d292
--- /dev/null
+++ b/tajo-core-tests/src/test/java/org/apache/tajo/engine/planner/physical/TestProgressExternalSortExec.java
@@ -0,0 +1,229 @@
+/**
+ * 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.TajoConstants;
+import org.apache.tajo.TajoTestingCluster;
+import org.apache.tajo.algebra.Expr;
+import org.apache.tajo.catalog.*;
+import org.apache.tajo.catalog.statistics.TableStats;
+import org.apache.tajo.common.TajoDataTypes;
+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.plan.LogicalPlan;
+import org.apache.tajo.plan.LogicalPlanner;
+import org.apache.tajo.engine.planner.PhysicalPlanner;
+import org.apache.tajo.engine.planner.PhysicalPlannerImpl;
+import org.apache.tajo.engine.planner.enforce.Enforcer;
+import org.apache.tajo.plan.logical.LogicalNode;
+import org.apache.tajo.engine.query.QueryContext;
+import org.apache.tajo.storage.*;
+import org.apache.tajo.storage.fragment.FileFragment;
+import org.apache.tajo.util.CommonTestingUtil;
+import org.apache.tajo.worker.TaskAttemptContext;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.Random;
+
+import static junit.framework.Assert.assertNotNull;
+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 TestProgressExternalSortExec {
+  private TajoConf conf;
+  private TajoTestingCluster util;
+  private final String TEST_PATH = TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/TestProgressExternalSortExec";
+  private CatalogService catalog;
+  private SQLAnalyzer analyzer;
+  private LogicalPlanner planner;
+  private Path testDir;
+
+  private final int numTuple = 100000;
+  private Random rnd = new Random(System.currentTimeMillis());
+
+  private TableDesc employee;
+
+  private TableStats testDataStats;
+  @Before
+  public void setUp() throws Exception {
+    this.conf = new TajoConf();
+    util = new TajoTestingCluster();
+    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.setVar(TajoConf.ConfVars.WORKER_TEMPORAL_DIR, testDir.toString());
+
+    Schema schema = new Schema();
+    schema.addColumn("managerid", TajoDataTypes.Type.INT4);
+    schema.addColumn("empid", TajoDataTypes.Type.INT4);
+    schema.addColumn("deptname", TajoDataTypes.Type.TEXT);
+
+    TableMeta employeeMeta = CatalogUtil.newTableMeta("RAW");
+    Path employeePath = new Path(testDir, "employee.csv");
+    Appender appender = ((FileTablespace) TablespaceManager.getLocalFs())
+        .getAppender(employeeMeta, schema, employeePath);
+    appender.enableStats();
+    appender.init();
+    VTuple tuple = new VTuple(schema.size());
+    for (int i = 0; i < numTuple; i++) {
+      tuple.put(new Datum[] {
+          DatumFactory.createInt4(rnd.nextInt(50)),
+          DatumFactory.createInt4(rnd.nextInt(100)),
+          DatumFactory.createText("dept_" + i),
+      });
+      appender.addTuple(tuple);
+    }
+    appender.flush();
+    appender.close();
+
+    testDataStats = appender.getStats();
+    employee = new TableDesc(
+        CatalogUtil.buildFQName(TajoConstants.DEFAULT_DATABASE_NAME, "employee"), schema, employeeMeta,
+        employeePath.toUri());
+    catalog.createTable(employee);
+    analyzer = new SQLAnalyzer();
+    planner = new LogicalPlanner(catalog, TablespaceManager.getInstance());
+  }
+
+  @After
+  public void tearDown() throws Exception {
+    CommonTestingUtil.cleanupTestDir(TEST_PATH);
+    util.shutdownCatalogCluster();
+  }
+
+  String[] QUERIES = {
+      "select managerId, empId from employee order by managerId, empId"
+  };
+
+  @Test
+  public void testExternalSortExecProgressWithMemTableScanner() throws Exception {
+    testProgress(testDataStats.getNumBytes().intValue() * 20);    //multiply 20 for memory fit
+  }
+
+  @Test
+  public void testExternalSortExecProgressWithPairWiseMerger() throws Exception {
+    testProgress(testDataStats.getNumBytes().intValue());
+  }
+
+  private void testProgress(int sortBufferBytesNum) throws Exception {
+    FileFragment[] frags = FileTablespace.splitNG(conf, "default.employee", employee.getMeta(),
+        new Path(employee.getUri()), Integer.MAX_VALUE);
+    Path workDir = new Path(testDir, TestExternalSortExec.class.getName());
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(), new FileFragment[] { frags[0] }, workDir);
+    ctx.setEnforcer(new Enforcer());
+    Expr expr = analyzer.parse(QUERIES[0]);
+    LogicalPlan plan = planner.createPlan(LocalTajoTestingUtility.createDummyContext(conf), expr);
+    LogicalNode rootNode = plan.getRootBlock().getRoot();
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, rootNode);
+
+    ProjectionExec proj = (ProjectionExec) exec;
+
+    // TODO - should be planed with user's optimization hint
+    if (!(proj.getChild() instanceof ExternalSortExec)) {
+      UnaryPhysicalExec sortExec = proj.getChild();
+      SeqScanExec scan = sortExec.getChild();
+
+      ExternalSortExec extSort = new ExternalSortExec(ctx, ((MemSortExec)sortExec).getPlan(), scan);
+
+      extSort.setSortBufferBytesNum(sortBufferBytesNum);
+      proj.setChild(extSort);
+    } else {
+      ((ExternalSortExec)proj.getChild()).setSortBufferBytesNum(sortBufferBytesNum);
+    }
+
+    Tuple tuple;
+    Tuple preVal = null;
+    Tuple curVal;
+    int cnt = 0;
+    exec.init();
+    BaseTupleComparator comparator = new BaseTupleComparator(proj.getSchema(),
+        new SortSpec[]{
+            new SortSpec(new Column("managerid", TajoDataTypes.Type.INT4)),
+            new SortSpec(new Column("empid", TajoDataTypes.Type.INT4))
+        });
+
+    float initProgress = 0.0f;
+    while ((tuple = exec.next()) != null) {
+      if (cnt == 0) {
+        initProgress = exec.getProgress();
+        assertTrue(initProgress > 0.5f && initProgress < 1.0f);
+      }
+
+      if (cnt == testDataStats.getNumRows() / 2) {
+        float progress = exec.getProgress();
+
+        assertTrue(progress > initProgress);
+      }
+      curVal = tuple;
+      if (preVal != null) {
+        assertTrue("prev: " + preVal + ", but cur: " + curVal, comparator.compare(preVal, curVal) <= 0);
+      }
+      preVal = curVal;
+      cnt++;
+    }
+
+    assertEquals(1.0f, exec.getProgress(), 0);
+    assertEquals(numTuple, cnt);
+
+    TableStats tableStats = exec.getInputStats();
+    assertNotNull(tableStats);
+    assertEquals(testDataStats.getNumBytes().longValue(), tableStats.getNumBytes().longValue());
+    assertEquals(cnt, testDataStats.getNumRows().longValue());
+    assertEquals(cnt, tableStats.getNumRows().longValue());
+    assertEquals(testDataStats.getNumBytes().longValue(), tableStats.getReadBytes().longValue());
+
+    // for rescan test
+    preVal = null;
+    exec.rescan();
+
+    cnt = 0;
+    while ((tuple = exec.next()) != null) {
+      curVal = tuple;
+      if (preVal != null) {
+        assertTrue("prev: " + preVal + ", but cur: " + curVal, comparator.compare(preVal, curVal) <= 0);
+      }
+      preVal = curVal;
+      cnt++;
+    }
+    assertEquals(1.0f, exec.getProgress(), 0);
+    assertEquals(numTuple, cnt);
+    exec.close();
+    assertEquals(1.0f, exec.getProgress(), 0);
+
+    tableStats = exec.getInputStats();
+    assertNotNull(tableStats);
+    assertEquals(testDataStats.getNumBytes().longValue(), tableStats.getNumBytes().longValue());
+    assertEquals(cnt, testDataStats.getNumRows().longValue());
+    assertEquals(cnt, tableStats.getNumRows().longValue());
+    assertEquals(testDataStats.getNumBytes().longValue(), tableStats.getReadBytes().longValue());
+  }
+}

http://git-wip-us.apache.org/repos/asf/tajo/blob/a4106883/tajo-core-tests/src/test/java/org/apache/tajo/engine/planner/physical/TestRightOuterHashJoinExec.java
----------------------------------------------------------------------
diff --git a/tajo-core-tests/src/test/java/org/apache/tajo/engine/planner/physical/TestRightOuterHashJoinExec.java b/tajo-core-tests/src/test/java/org/apache/tajo/engine/planner/physical/TestRightOuterHashJoinExec.java
new file mode 100644
index 0000000..fe36602
--- /dev/null
+++ b/tajo-core-tests/src/test/java/org/apache/tajo/engine/planner/physical/TestRightOuterHashJoinExec.java
@@ -0,0 +1,351 @@
+/**
+ * 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.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.PhysicalPlanner;
+import org.apache.tajo.engine.planner.PhysicalPlannerImpl;
+import org.apache.tajo.engine.planner.enforce.Enforcer;
+import org.apache.tajo.engine.query.QueryContext;
+import org.apache.tajo.exception.TajoException;
+import org.apache.tajo.plan.LogicalPlanner;
+import org.apache.tajo.plan.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;
+
+// this is not a physical operator in itself, but it uses the HashLeftOuterJoinExec with switched inputs order
+public class TestRightOuterHashJoinExec {
+  private TajoConf conf;
+  private final String TEST_PATH = TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/TestRightOuterHashJoinExec";
+  private TajoTestingCluster util;
+  private CatalogService catalog;
+  private SQLAnalyzer analyzer;
+  private LogicalPlanner planner;
+  private Path testDir;
+  private QueryContext defaultContext;
+
+  private TableDesc dep3;
+  private TableDesc job3;
+  private TableDesc emp3;
+
+  private final String DEP3_NAME = CatalogUtil.buildFQName(DEFAULT_DATABASE_NAME, "dep3");
+  private final String JOB3_NAME = CatalogUtil.buildFQName(DEFAULT_DATABASE_NAME, "job3");
+  private final String EMP3_NAME = CatalogUtil.buildFQName(DEFAULT_DATABASE_NAME, "emp3");
+
+  @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();
+
+    //----------------- dep3 ------------------------------
+    // dep_id | dep_name  | loc_id
+    //--------------------------------
+    //  0     | dep_0     | 1000
+    //  1     | dep_1     | 1001
+    //  2     | dep_2     | 1002
+    //  3     | dep_3     | 1003
+    //  4     | dep_4     | 1004
+    //  5     | dep_5     | 1005
+    //  6     | dep_6     | 1006
+    //  7     | dep_7     | 1007
+    //  8     | dep_8     | 1008
+    //  9     | dep_9     | 1009
+    Schema dep3Schema = new Schema();
+    dep3Schema.addColumn("dep_id", Type.INT4);
+    dep3Schema.addColumn("dep_name", Type.TEXT);
+    dep3Schema.addColumn("loc_id", Type.INT4);
+
+
+    TableMeta dep3Meta = CatalogUtil.newTableMeta("TEXT");
+    Path dep3Path = new Path(testDir, "dep3.csv");
+    Appender appender1 = ((FileTablespace) TablespaceManager.getLocalFs())
+        .getAppender(dep3Meta, dep3Schema, dep3Path);
+    appender1.init();
+    VTuple tuple = new VTuple(dep3Schema.size());
+    for (int i = 0; i < 10; i++) {
+      tuple.put(new Datum[] { DatumFactory.createInt4(i),
+                    DatumFactory.createText("dept_" + i),
+                    DatumFactory.createInt4(1000 + i) });
+      appender1.addTuple(tuple);
+    }
+
+    appender1.flush();
+    appender1.close();
+    dep3 = CatalogUtil.newTableDesc(DEP3_NAME, dep3Schema, dep3Meta, dep3Path);
+    catalog.createTable(dep3);
+
+    //----------------- job3 ------------------------------
+    //  job_id  | job_title
+    // ----------------------
+    //   101    |  job_101
+    //   102    |  job_102
+    //   103    |  job_103
+
+    Schema job3Schema = new Schema();
+    job3Schema.addColumn("job_id", Type.INT4);
+    job3Schema.addColumn("job_title", Type.TEXT);
+
+
+    TableMeta job3Meta = CatalogUtil.newTableMeta("TEXT");
+    Path job3Path = new Path(testDir, "job3.csv");
+    Appender appender2 = ((FileTablespace) TablespaceManager.getLocalFs())
+        .getAppender(job3Meta, job3Schema, job3Path);
+    appender2.init();
+    VTuple tuple2 = new VTuple(job3Schema.size());
+    for (int i = 1; i < 4; i++) {
+      int x = 100 + i;
+      tuple2.put(new Datum[] { DatumFactory.createInt4(100 + i),
+                    DatumFactory.createText("job_" + x) });
+      appender2.addTuple(tuple2);
+    }
+
+    appender2.flush();
+    appender2.close();
+    job3 = CatalogUtil.newTableDesc(JOB3_NAME, job3Schema, job3Meta, job3Path);
+    catalog.createTable(job3);
+
+
+
+    //---------------------emp3 --------------------
+    // emp_id  | first_name | last_name | dep_id | salary | job_id
+    // ------------------------------------------------------------
+    //  11     |  fn_11     |  ln_11    |  1     | 123    | 101
+    //  13     |  fn_13     |  ln_13    |  3     | 369    | 103
+    //  15     |  fn_15     |  ln_15    |  5     | 615    | null
+    //  17     |  fn_17     |  ln_17    |  7     | 861    | null
+    //  19     |  fn_19     |  ln_19    |  9     | 1107   | null
+    //  21     |  fn_21     |  ln_21    |  1     | 123    | 101
+    //  23     |  fn_23     |  ln_23    |  3     | 369    | 103
+
+    Schema emp3Schema = new Schema();
+    emp3Schema.addColumn("emp_id", Type.INT4);
+    emp3Schema.addColumn("first_name", Type.TEXT);
+    emp3Schema.addColumn("last_name", Type.TEXT);
+    emp3Schema.addColumn("dep_id", Type.INT4);
+    emp3Schema.addColumn("salary", Type.FLOAT4);
+    emp3Schema.addColumn("job_id", Type.INT4);
+
+
+    TableMeta emp3Meta = CatalogUtil.newTableMeta("TEXT");
+    Path emp3Path = new Path(testDir, "emp3.csv");
+    Appender appender3 = ((FileTablespace) TablespaceManager.getLocalFs())
+        .getAppender(emp3Meta, emp3Schema, emp3Path);
+    appender3.init();
+    VTuple tuple3 = new VTuple(emp3Schema.size());
+
+    for (int i = 1; i < 4; i += 2) {
+      int x = 10 + i;
+      tuple3.put(new Datum[] { DatumFactory.createInt4(10 + i),
+          DatumFactory.createText("firstname_" + x),
+          DatumFactory.createText("lastname_" + x),
+          DatumFactory.createInt4(i),
+          DatumFactory.createFloat4(123 * i),
+          DatumFactory.createInt4(100 + i) });
+      appender3.addTuple(tuple3);
+
+      int y = 20 + i;
+      tuple3.put(new Datum[] { DatumFactory.createInt4(20 + i),
+          DatumFactory.createText("firstname_" + y),
+          DatumFactory.createText("lastname_" + y),
+          DatumFactory.createInt4(i),
+          DatumFactory.createFloat4(123 * i),
+          DatumFactory.createInt4(100 + i) });
+      appender3.addTuple(tuple3);
+    }
+
+    for (int i = 5; i < 10; i += 2) {
+      int x = 10 + i;
+      tuple3.put(new Datum[] { DatumFactory.createInt4(10 + i),
+          DatumFactory.createText("firstname_" + x),
+          DatumFactory.createText("lastname_" + x),
+          DatumFactory.createInt4(i),
+          DatumFactory.createFloat4(123 * i),
+          DatumFactory.createNullDatum() });
+      appender3.addTuple(tuple3);
+    }
+
+    appender3.flush();
+    appender3.close();
+    emp3 = CatalogUtil.newTableDesc(EMP3_NAME, emp3Schema, emp3Meta, emp3Path);
+    catalog.createTable(emp3);
+
+    analyzer = new SQLAnalyzer();
+    planner = new LogicalPlanner(catalog, TablespaceManager.getInstance());
+    defaultContext = LocalTajoTestingUtility.createDummyContext(conf);
+  }
+
+  @After
+  public void tearDown() throws Exception {
+    util.shutdownCatalogCluster();
+  }
+
+  String[] QUERIES = {
+      "select dep3.dep_id, dep_name, emp_id, salary from emp3 right outer join dep3 on dep3.dep_id = emp3.dep_id", //0 no nulls
+      "select job3.job_id, job_title, emp_id, salary from emp3 right outer join job3 on job3.job_id=emp3.job_id", //1 nulls on the left operand
+      "select job3.job_id, job_title, emp_id, salary from job3 right outer join emp3 on job3.job_id=emp3.job_id" //2 nulls on the right side
+  };
+
+  @Test
+  public final void testRightOuter_HashJoinExec0() throws IOException, TajoException {
+    FileFragment[] emp3Frags = FileTablespace.splitNG(conf, EMP3_NAME, emp3.getMeta(), new Path(emp3.getUri()),
+        Integer.MAX_VALUE);
+    FileFragment[] dep3Frags = FileTablespace.splitNG(conf, DEP3_NAME, dep3.getMeta(), new Path(dep3.getUri()),
+        Integer.MAX_VALUE);
+
+    FileFragment[] merged = TUtil.concat(emp3Frags, dep3Frags);
+
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/TestRightOuter_HashJoinExec0");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(), merged, workDir);
+    ctx.setEnforcer(new Enforcer());
+    Expr expr = analyzer.parse(QUERIES[0]);
+    LogicalNode plan = planner.createPlan(defaultContext, expr).getRootBlock().getRoot();
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, plan);
+
+    ProjectionExec proj = (ProjectionExec) exec;
+    if (proj.getChild() instanceof RightOuterMergeJoinExec) {
+       //for this small data set this is not likely to happen
+      
+      assertEquals(1, 0);
+    }
+    else{
+       Tuple tuple;
+       int count = 0;
+       int i = 1;
+       exec.init();
+  
+       while ((tuple = exec.next()) != null) {
+         //TODO check contents
+         count = count + 1;
+       }
+       exec.close();
+       assertEquals(12, count);
+    }
+  }
+
+
+  @Test
+  public final void testRightOuter_HashJoinExec1() throws IOException, TajoException {
+    FileFragment[] job3Frags = FileTablespace.splitNG(conf, JOB3_NAME, job3.getMeta(), new Path(job3.getUri()),
+        Integer.MAX_VALUE);
+    FileFragment[] emp3Frags = FileTablespace.splitNG(conf, EMP3_NAME, emp3.getMeta(), new Path(emp3.getUri()),
+        Integer.MAX_VALUE);
+
+    FileFragment[] merged = TUtil.concat(emp3Frags, job3Frags);
+
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/TestRightOuter_HashJoinExec1");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(), merged, workDir);
+    ctx.setEnforcer(new Enforcer());
+    Expr expr = analyzer.parse(QUERIES[1]);
+    LogicalNode plan = planner.createPlan(defaultContext, expr).getRootBlock().getRoot();
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, plan);
+
+    ProjectionExec proj = (ProjectionExec) exec;
+    if (proj.getChild() instanceof RightOuterMergeJoinExec) {
+       //for this small data set this is not likely to happen
+      
+      assertEquals(1, 0);
+    }
+    else{
+       Tuple tuple;
+       int count = 0;
+       int i = 1;
+       exec.init();
+  
+       while ((tuple = exec.next()) != null) {
+         //TODO check contents
+         count = count + 1;
+       }
+       exec.close();
+       assertEquals(5, count);
+    }
+  }
+
+    @Test
+  public final void testRightOuter_HashJoinExec2() throws IOException, TajoException {
+    
+    FileFragment[] emp3Frags = FileTablespace.splitNG(conf, EMP3_NAME, emp3.getMeta(), new Path(emp3.getUri()),
+        Integer.MAX_VALUE);
+    FileFragment[] job3Frags = FileTablespace.splitNG(conf, JOB3_NAME, job3.getMeta(), new Path(job3.getUri()),
+        Integer.MAX_VALUE);
+
+    FileFragment[] merged = TUtil.concat(job3Frags, emp3Frags);
+
+    Path workDir = CommonTestingUtil.getTestDir(TajoTestingCluster.DEFAULT_TEST_DIRECTORY + "/TestRightOuter_HashJoinExec2");
+    TaskAttemptContext ctx = new TaskAttemptContext(new QueryContext(conf),
+        LocalTajoTestingUtility.newTaskAttemptId(), merged, workDir);
+    ctx.setEnforcer(new Enforcer());
+    Expr expr = analyzer.parse(QUERIES[2]);
+    LogicalNode plan = planner.createPlan(defaultContext, expr).getRootBlock().getRoot();
+
+    PhysicalPlanner phyPlanner = new PhysicalPlannerImpl(conf);
+    PhysicalExec exec = phyPlanner.createPlan(ctx, plan);
+
+    ProjectionExec proj = (ProjectionExec) exec;
+    if (proj.getChild() instanceof RightOuterMergeJoinExec) {
+      //for this small data set this is not likely to happen
+      
+      assertEquals(1, 0);
+    }
+    else{
+       Tuple tuple;
+       int count = 0;
+       int i = 1;
+       exec.init();
+  
+       while ((tuple = exec.next()) != null) {
+         //TODO check contents
+         count = count + 1;
+       }
+       exec.close();
+       assertEquals(7, count);
+    }
+  }
+}


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