exec/jdbc/src/test/java/org/apache/drill/jdbc/test/JdbcDataTest.java - drill - Git at Google

 /*
  * 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.drill.jdbc.test;

 import java.io.IOException;
 import java.sql.Connection;
 import java.sql.Driver;
 import java.sql.DriverManager;
 import java.sql.Statement;
 import java.util.Iterator;
 import java.util.Map;
 import java.util.ServiceLoader;

 import org.apache.calcite.rel.core.JoinRelType;
 import org.apache.drill.common.logical.LogicalPlan;
 import org.apache.drill.common.logical.PlanProperties;
 import org.apache.drill.common.logical.StoragePluginConfig;
 import org.apache.drill.common.logical.data.Filter;
 import org.apache.drill.common.logical.data.Join;
 import org.apache.drill.common.logical.data.Limit;
 import org.apache.drill.common.logical.data.LogicalOperator;
 import org.apache.drill.common.logical.data.Order;
 import org.apache.drill.common.logical.data.Project;
 import org.apache.drill.common.logical.data.Scan;
 import org.apache.drill.common.logical.data.Store;
 import org.apache.drill.common.logical.data.Union;
 import org.apache.drill.jdbc.JdbcTestBase;
 import org.apache.drill.categories.JdbcTest;
 import org.junit.Assert;
 import org.junit.BeforeClass;
 import org.junit.Ignore;
 import org.junit.Test;

 import com.google.common.base.Charsets;
 import com.google.common.base.Function;
 import com.google.common.base.Predicate;
 import com.google.common.collect.Iterables;
 import com.google.common.io.Resources;
 import org.junit.experimental.categories.Category;

 /** Unit tests for Drill's JDBC driver. */

 @Ignore // ignore for now.
 @Category(JdbcTest.class)
 public class JdbcDataTest extends JdbcTestBase {
   private static String MODEL;
   private static String EXPECTED;


   @BeforeClass
   public static void setupFixtures() throws IOException {
     MODEL = Resources.toString(Resources.getResource("test-models.json"), Charsets.UTF_8);
     EXPECTED = Resources.toString(Resources.getResource("donuts-output-data.txt"), Charsets.UTF_8);
   }

   /**
    * Command-line utility to execute a logical plan.
    *
    * <p>
    * The forwarding method ensures that the IDE calls this method with the right classpath.
    * </p>
    */
   public static void main(String[] args) throws Exception {
   }

   /** Load driver. */
   @Test
   public void testLoadDriver() throws ClassNotFoundException {
     Class.forName("org.apache.drill.jdbc.Driver");
   }

   /**
    * Load the driver using ServiceLoader
    */
   @Test
   public void testLoadDriverServiceLoader() {
     ServiceLoader<Driver> sl = ServiceLoader.load(Driver.class);
     for(Iterator<Driver> it = sl.iterator(); it.hasNext(); ) {
       Driver driver = it.next();
       if (driver instanceof org.apache.drill.jdbc.Driver) {
         return;
       }
     }

     Assert.fail("org.apache.drill.jdbc.Driver not found using ServiceLoader");
   }

   /** Load driver and make a connection. */
   @Test
   public void testConnect() throws Exception {
     Class.forName("org.apache.drill.jdbc.Driver");
     final Connection connection = DriverManager.getConnection("jdbc:drill:zk=local");
     connection.close();
   }

   /** Load driver, make a connection, prepare a statement. */
   @Test
   public void testPrepare() throws Exception {
     withModel(MODEL, "DONUTS").withConnection(new Function<Connection, Void>() {
       @Override
       public Void apply(Connection connection) {
         try {
           final Statement statement = connection.prepareStatement("select * from donuts");
           statement.close();
           return null;
         } catch (Exception e) {
           throw new RuntimeException(e);
         }
       }
     });
   }

   /** Simple query against JSON. */
   @Test
   public void testSelectJson() throws Exception {
     withModel(MODEL, "DONUTS").sql("select * from donuts").returns(EXPECTED);
   }

   /** Simple query against EMP table in HR database. */
   @Test
   public void testSelectEmployees() throws Exception {
     withModel(MODEL, "HR")
         .sql("select * from employees")
         .returns(
             "_MAP={deptId=31, lastName=Rafferty}\n" + "_MAP={deptId=33, lastName=Jones}\n"
                 + "_MAP={deptId=33, lastName=Steinberg}\n" + "_MAP={deptId=34, lastName=Robinson}\n"
                 + "_MAP={deptId=34, lastName=Smith}\n" + "_MAP={lastName=John}\n");
   }

   /** Simple query against EMP table in HR database. */
   @Test
   public void testSelectEmpView() throws Exception {
     withModel(MODEL, "HR")
         .sql("select * from emp")
         .returns(
             "DEPTID=31; LASTNAME=Rafferty\n" + "DEPTID=33; LASTNAME=Jones\n" + "DEPTID=33; LASTNAME=Steinberg\n"
                 + "DEPTID=34; LASTNAME=Robinson\n" + "DEPTID=34; LASTNAME=Smith\n" + "DEPTID=null; LASTNAME=John\n");
   }

   /** Simple query against EMP table in HR database. */
   @Test
   public void testSelectDept() throws Exception {
     withModel(MODEL, "HR")
         .sql("select * from departments")
         .returns(
             "_MAP={deptId=31, name=Sales}\n" + "_MAP={deptId=33, name=Engineering}\n"
                 + "_MAP={deptId=34, name=Clerical}\n" + "_MAP={deptId=35, name=Marketing}\n");
   }

   /** Query with project list. No field references yet. */
   @Test
   public void testProjectConstant() throws Exception {
     withModel(MODEL, "DONUTS").sql("select 1 + 3 as c from donuts")
         .returns("C=4\n" + "C=4\n" + "C=4\n" + "C=4\n" + "C=4\n");
   }

   /** Query that projects an element from the map. */
   @Test
   public void testProject() throws Exception {
     withModel(MODEL, "DONUTS").sql("select _MAP['ppu'] as ppu from donuts")
         .returns("PPU=0.55\n" + "PPU=0.69\n" + "PPU=0.55\n" + "PPU=0.69\n" + "PPU=1.0\n");
   }

   /** Same logic as {@link #testProject()}, but using a subquery. */
   @Test
   public void testProjectOnSubquery() throws Exception {
     withModel(MODEL, "DONUTS").sql("select d['ppu'] as ppu from (\n" + " select _MAP as d from donuts)")
         .returns("PPU=0.55\n" + "PPU=0.69\n" + "PPU=0.55\n" + "PPU=0.69\n" + "PPU=1.0\n");
   }

   /** Checks the logical plan. */
   @Test
   public void testProjectPlan() throws Exception {
     LogicalPlan plan = withModel(MODEL, "DONUTS")
         .sql("select _MAP['ppu'] as ppu from donuts")
         .logicalPlan();

     PlanProperties planProperties = plan.getProperties();
     Assert.assertEquals("optiq", planProperties.generator.type);
     Assert.assertEquals("na", planProperties.generator.info);
     Assert.assertEquals(1, planProperties.version);
     Assert.assertEquals(PlanProperties.PlanType.APACHE_DRILL_LOGICAL, planProperties.type);
     Map<String, StoragePluginConfig> seConfigs = plan.getStorageEngines();
     StoragePluginConfig config = seConfigs.get("donuts-json");
 //    Assert.assertTrue(config != null && config instanceof ClasspathRSE.ClasspathRSEConfig);
     config = seConfigs.get("queue");
 //    Assert.assertTrue(config != null && config instanceof QueueRSE.QueueRSEConfig);
     Scan scan = findOnlyOperator(plan, Scan.class);
     Assert.assertEquals("donuts-json", scan.getStorageEngine());
     Project project = findOnlyOperator(plan, Project.class);
     Assert.assertEquals(1, project.getSelections().size());
     Assert.assertEquals(Scan.class, project.getInput().getClass());
     Store store = findOnlyOperator(plan, Store.class);
     Assert.assertEquals("queue", store.getStorageEngine());
     Assert.assertEquals("output sink", store.getMemo());
     Assert.assertEquals(Project.class, store.getInput().getClass());
   }

   /**
    * Query with subquery, filter, and projection of one real and one nonexistent field from a map field.
    */
   @Test
   public void testProjectFilterSubquery() throws Exception {
     withModel(MODEL, "DONUTS")
         .sql(
             "select d['name'] as name, d['xx'] as xx from (\n" + " select _MAP as d from donuts)\n"
                 + "where cast(d['ppu'] as double) > 0.6")
         .returns("NAME=Raised; XX=null\n" + "NAME=Filled; XX=null\n" + "NAME=Apple Fritter; XX=null\n");
   }

   private static <T extends LogicalOperator> Iterable<T> findOperator(LogicalPlan plan, final Class<T> operatorClazz) {
     return (Iterable<T>) Iterables.filter(plan.getSortedOperators(), new Predicate<LogicalOperator>() {
       @Override
       public boolean apply(LogicalOperator input) {
         return input.getClass().equals(operatorClazz);
       }
     });
   }

   private static <T extends LogicalOperator> T findOnlyOperator(LogicalPlan plan, final Class<T> operatorClazz) {
     return Iterables.getOnlyElement(findOperator(plan, operatorClazz));
   }

   @Test
   public void testProjectFilterSubqueryPlan() throws Exception {
     LogicalPlan plan = withModel(MODEL, "DONUTS")
         .sql(
             "select d['name'] as name, d['xx'] as xx from (\n" + " select _MAP['donuts'] as d from donuts)\n"
                 + "where cast(d['ppu'] as double) > 0.6")
         .logicalPlan();
     PlanProperties planProperties = plan.getProperties();
     Assert.assertEquals("optiq", planProperties.generator.type);
     Assert.assertEquals("na", planProperties.generator.info);
     Assert.assertEquals(1, planProperties.version);
     Assert.assertEquals(PlanProperties.PlanType.APACHE_DRILL_LOGICAL, planProperties.type);
     Map<String, StoragePluginConfig> seConfigs = plan.getStorageEngines();
     StoragePluginConfig config = seConfigs.get("donuts-json");
 //    Assert.assertTrue(config != null && config instanceof ClasspathRSE.ClasspathRSEConfig);
     config = seConfigs.get("queue");
 //    Assert.assertTrue(config != null && config instanceof QueueRSE.QueueRSEConfig);
     Scan scan = findOnlyOperator(plan, Scan.class);
     Assert.assertEquals("donuts-json", scan.getStorageEngine());
     Filter filter = findOnlyOperator(plan, Filter.class);
     Assert.assertTrue(filter.getInput() instanceof Scan);
     Project[] projects = Iterables.toArray(findOperator(plan, Project.class), Project.class);
     Assert.assertEquals(2, projects.length);
     Assert.assertEquals(1, projects[0].getSelections().size());
     Assert.assertEquals(Filter.class, projects[0].getInput().getClass());
     Assert.assertEquals(2, projects[1].getSelections().size());
     Assert.assertEquals(Project.class, projects[1].getInput().getClass());
     Store store = findOnlyOperator(plan, Store.class);
     Assert.assertEquals("queue", store.getStorageEngine());
     Assert.assertEquals("output sink", store.getMemo());
     Assert.assertEquals(Project.class, store.getInput().getClass());
   }

   /** Query that projects one field. (Disabled; uses sugared syntax.) */
   @Test @Ignore
   public void testProjectNestedFieldSugared() throws Exception {
     withModel(MODEL, "DONUTS").sql("select donuts.ppu from donuts")
         .returns("C=4\n" + "C=4\n" + "C=4\n" + "C=4\n" + "C=4\n");
   }

   /** Query with filter. No field references yet. */
   @Test
   public void testFilterConstantFalse() throws Exception {
     withModel(MODEL, "DONUTS").sql("select * from donuts where 3 > 4").returns("");
   }

   @Test
   public void testFilterConstant() throws Exception {
     withModel(MODEL, "DONUTS").sql("select * from donuts where 3 < 4").returns(EXPECTED);
   }


   @Ignore
   @Test
   public void testValues() throws Exception {
     withModel(MODEL, "DONUTS").sql("values (1)").returns("EXPR$0=1\n");

     // Enable when https://issues.apache.org/jira/browse/DRILL-57 fixed
     // .planContains("store");
   }

   @Test
   public void testJoin() throws Exception {
     Join join = withModel(MODEL, "HR")
         .sql("select * from emp join dept on emp.deptId = dept.deptId")
         .returnsUnordered("DEPTID=31; LASTNAME=Rafferty; DEPTID0=31; NAME=Sales",
             "DEPTID=33; LASTNAME=Jones; DEPTID0=33; NAME=Engineering",
             "DEPTID=33; LASTNAME=Steinberg; DEPTID0=33; NAME=Engineering",
             "DEPTID=34; LASTNAME=Robinson; DEPTID0=34; NAME=Clerical",
             "DEPTID=34; LASTNAME=Smith; DEPTID0=34; NAME=Clerical").planContains(Join.class);
     Assert.assertEquals(JoinRelType.INNER, join.getJoinType());
   }

   @Test
   public void testLeftJoin() throws Exception {
     Join join = withModel(MODEL, "HR")
         .sql("select * from emp left join dept on emp.deptId = dept.deptId")
         .returnsUnordered("DEPTID=31; LASTNAME=Rafferty; DEPTID0=31; NAME=Sales",
             "DEPTID=33; LASTNAME=Jones; DEPTID0=33; NAME=Engineering",
             "DEPTID=33; LASTNAME=Steinberg; DEPTID0=33; NAME=Engineering",
             "DEPTID=34; LASTNAME=Robinson; DEPTID0=34; NAME=Clerical",
             "DEPTID=34; LASTNAME=Smith; DEPTID0=34; NAME=Clerical",
             "DEPTID=null; LASTNAME=John; DEPTID0=null; NAME=null").planContains(Join.class);
     Assert.assertEquals(JoinRelType.LEFT, join.getJoinType());
   }

   /**
    * Right join is tricky because Drill's "join" operator only supports "left", so we have to flip inputs.
    */
   @Test @Ignore
   public void testRightJoin() throws Exception {
     Join join = withModel(MODEL, "HR").sql("select * from emp right join dept on emp.deptId = dept.deptId")
         .returnsUnordered("xx").planContains(Join.class);
     Assert.assertEquals(JoinRelType.LEFT, join.getJoinType());
   }

   @Test
   public void testFullJoin() throws Exception {
     Join join = withModel(MODEL, "HR")
         .sql("select * from emp full join dept on emp.deptId = dept.deptId")
         .returnsUnordered("DEPTID=31; LASTNAME=Rafferty; DEPTID0=31; NAME=Sales",
             "DEPTID=33; LASTNAME=Jones; DEPTID0=33; NAME=Engineering",
             "DEPTID=33; LASTNAME=Steinberg; DEPTID0=33; NAME=Engineering",
             "DEPTID=34; LASTNAME=Robinson; DEPTID0=34; NAME=Clerical",
             "DEPTID=34; LASTNAME=Smith; DEPTID0=34; NAME=Clerical",
             "DEPTID=null; LASTNAME=John; DEPTID0=null; NAME=null",
             "DEPTID=null; LASTNAME=null; DEPTID0=35; NAME=Marketing").planContains(Join.class);
     Assert.assertEquals(JoinRelType.FULL, join.getJoinType());
   }

   /**
    * Join on subquery; also tests that if a field of the same name exists in both inputs, both fields make it through
    * the join.
    */
   @Test
   public void testJoinOnSubquery() throws Exception {
     Join join = withModel(MODEL, "HR")
         .sql(
             "select * from (\n" + "select deptId, lastname, 'x' as name from emp) as e\n"
                 + " join dept on e.deptId = dept.deptId")
         .returnsUnordered("DEPTID=31; LASTNAME=Rafferty; NAME=x; DEPTID0=31; NAME0=Sales",
             "DEPTID=33; LASTNAME=Jones; NAME=x; DEPTID0=33; NAME0=Engineering",
             "DEPTID=33; LASTNAME=Steinberg; NAME=x; DEPTID0=33; NAME0=Engineering",
             "DEPTID=34; LASTNAME=Robinson; NAME=x; DEPTID0=34; NAME0=Clerical",
             "DEPTID=34; LASTNAME=Smith; NAME=x; DEPTID0=34; NAME0=Clerical").planContains(Join.class);
     Assert.assertEquals(JoinRelType.INNER, join.getJoinType());
   }

   /** Tests that one of the FoodMart tables is present. */
   @Test @Ignore
   public void testFoodMart() throws Exception {
     withModel(MODEL, "FOODMART")
         .sql("select * from product_class where cast(_map['product_class_id'] as integer) < 3")
         .returnsUnordered(
             "_MAP={product_category=Seafood, product_class_id=2, product_department=Seafood, product_family=Food, product_subcategory=Shellfish}",
             "_MAP={product_category=Specialty, product_class_id=1, product_department=Produce, product_family=Food, product_subcategory=Nuts}");
   }

   @Test
   public void testUnionAll() throws Exception {
     Union union = withModel(MODEL, "HR")
       .sql("select deptId from dept\n" + "union all\n" + "select deptId from emp")
       .returnsUnordered("DEPTID=31", "DEPTID=33", "DEPTID=34", "DEPTID=35", "DEPTID=null")
       .planContains(Union.class);
     Assert.assertFalse(union.isDistinct());
   }

   @Test
   public void testUnion() throws Exception {
     Union union = withModel(MODEL, "HR")
       .sql("select deptId from dept\n" + "union\n" + "select deptId from emp")
       .returnsUnordered("DEPTID=31", "DEPTID=33", "DEPTID=34", "DEPTID=35", "DEPTID=null")
       .planContains(Union.class);
     Assert.assertTrue(union.isDistinct());
   }

   @Test
   public void testOrderByDescNullsFirst() throws Exception {
     // desc nulls last
     withModel(MODEL, "HR")
         .sql("select * from emp order by deptId desc nulls first")
         .returns(
             "DEPTID=null; LASTNAME=John\n" + "DEPTID=34; LASTNAME=Robinson\n" + "DEPTID=34; LASTNAME=Smith\n"
                 + "DEPTID=33; LASTNAME=Jones\n" + "DEPTID=33; LASTNAME=Steinberg\n" + "DEPTID=31; LASTNAME=Rafferty\n")
         .planContains(Order.class);
   }

   @Test
   public void testOrderByDescNullsLast() throws Exception {
     // desc nulls first
     withModel(MODEL, "HR")
         .sql("select * from emp order by deptId desc nulls last")
         .returns(
             "DEPTID=34; LASTNAME=Robinson\n" + "DEPTID=34; LASTNAME=Smith\n" + "DEPTID=33; LASTNAME=Jones\n"
                 + "DEPTID=33; LASTNAME=Steinberg\n" + "DEPTID=31; LASTNAME=Rafferty\n" + "DEPTID=null; LASTNAME=John\n")
         .planContains(Order.class);
   }

   @Test @Ignore
   public void testOrderByDesc() throws Exception {
     // desc is implicitly "nulls first" (i.e. null sorted as +inf)
     // Current behavior is to sort nulls last. This is wrong.
     withModel(MODEL, "HR")
         .sql("select * from emp order by deptId desc")
         .returns(
             "DEPTID=null; LASTNAME=John\n" + "DEPTID=34; LASTNAME=Robinson\n" + "DEPTID=34; LASTNAME=Smith\n"
                 + "DEPTID=33; LASTNAME=Jones\n" + "DEPTID=33; LASTNAME=Steinberg\n" + "DEPTID=31; LASTNAME=Rafferty\n")
         .planContains(Order.class);
   }

   @Test
   public void testOrderBy() throws Exception {
     // no sort order specified is implicitly "asc", and asc is "nulls last"
     withModel(MODEL, "HR")
         .sql("select * from emp order by deptId")
         .returns(
             "DEPTID=31; LASTNAME=Rafferty\n"
             + "DEPTID=33; LASTNAME=Jones\n"
             + "DEPTID=33; LASTNAME=Steinberg\n"
             + "DEPTID=34; LASTNAME=Robinson\n"
             + "DEPTID=34; LASTNAME=Smith\n"
             + "DEPTID=null; LASTNAME=John\n")
         .planContains(Order.class);
   }

   @Test
   public void testLimit() throws Exception {
     withModel(MODEL, "HR")
         .sql("select LASTNAME from emp limit 2")
         .returns("LASTNAME=Rafferty\n" +
             "LASTNAME=Jones")
         .planContains(Limit.class);
   }


   @Test
   public void testLimitOrderBy() throws Exception {
     TestDataConnection tdc = withModel(MODEL, "HR")
         .sql("select LASTNAME from emp order by LASTNAME limit 2")
         .returns("LASTNAME=John\n" +
             "LASTNAME=Jones");
         tdc.planContains(Limit.class);
         tdc.planContains(Order.class);

   }

   @Test
   public void testOrderByWithOffset() throws Exception {
     withModel(MODEL, "HR")
         .sql("select LASTNAME from emp order by LASTNAME asc offset 3")
         .returns("LASTNAME=Robinson\n" +
             "LASTNAME=Smith\n" +
             "LASTNAME=Steinberg")
         .planContains(Limit.class);

   }

   @Test
   public void testOrderByWithOffsetAndFetch() throws Exception {
     withModel(MODEL, "HR")
         .sql("select LASTNAME from emp order by LASTNAME asc offset 3 fetch next 2 rows only")
         .returns("LASTNAME=Robinson\n" +
             "LASTNAME=Smith")
         .planContains(Limit.class);
   }
 }
	/*
	* 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.drill.jdbc.test;

	import java.io.IOException;
	import java.sql.Connection;
	import java.sql.Driver;
	import java.sql.DriverManager;
	import java.sql.Statement;
	import java.util.Iterator;
	import java.util.Map;
	import java.util.ServiceLoader;

	import org.apache.calcite.rel.core.JoinRelType;
	import org.apache.drill.common.logical.LogicalPlan;
	import org.apache.drill.common.logical.PlanProperties;
	import org.apache.drill.common.logical.StoragePluginConfig;
	import org.apache.drill.common.logical.data.Filter;
	import org.apache.drill.common.logical.data.Join;
	import org.apache.drill.common.logical.data.Limit;
	import org.apache.drill.common.logical.data.LogicalOperator;
	import org.apache.drill.common.logical.data.Order;
	import org.apache.drill.common.logical.data.Project;
	import org.apache.drill.common.logical.data.Scan;
	import org.apache.drill.common.logical.data.Store;
	import org.apache.drill.common.logical.data.Union;
	import org.apache.drill.jdbc.JdbcTestBase;
	import org.apache.drill.categories.JdbcTest;
	import org.junit.Assert;
	import org.junit.BeforeClass;
	import org.junit.Ignore;
	import org.junit.Test;

	import com.google.common.base.Charsets;
	import com.google.common.base.Function;
	import com.google.common.base.Predicate;
	import com.google.common.collect.Iterables;
	import com.google.common.io.Resources;
	import org.junit.experimental.categories.Category;

	/** Unit tests for Drill's JDBC driver. */

	@Ignore // ignore for now.
	@Category(JdbcTest.class)
	public class JdbcDataTest extends JdbcTestBase {
	private static String MODEL;
	private static String EXPECTED;


	@BeforeClass
	public static void setupFixtures() throws IOException {
	MODEL = Resources.toString(Resources.getResource("test-models.json"), Charsets.UTF_8);
	EXPECTED = Resources.toString(Resources.getResource("donuts-output-data.txt"), Charsets.UTF_8);
	}

	/**
	* Command-line utility to execute a logical plan.
	*
	* <p>
	* The forwarding method ensures that the IDE calls this method with the right classpath.
	* </p>
	*/
	public static void main(String[] args) throws Exception {
	}

	/** Load driver. */
	@Test
	public void testLoadDriver() throws ClassNotFoundException {
	Class.forName("org.apache.drill.jdbc.Driver");
	}

	/**
	* Load the driver using ServiceLoader
	*/
	@Test
	public void testLoadDriverServiceLoader() {
	ServiceLoader<Driver> sl = ServiceLoader.load(Driver.class);
	for(Iterator<Driver> it = sl.iterator(); it.hasNext(); ) {
	Driver driver = it.next();
	if (driver instanceof org.apache.drill.jdbc.Driver) {
	return;
	}
	}

	Assert.fail("org.apache.drill.jdbc.Driver not found using ServiceLoader");
	}

	/** Load driver and make a connection. */
	@Test
	public void testConnect() throws Exception {
	Class.forName("org.apache.drill.jdbc.Driver");
	final Connection connection = DriverManager.getConnection("jdbc:drill:zk=local");
	connection.close();
	}

	/** Load driver, make a connection, prepare a statement. */
	@Test
	public void testPrepare() throws Exception {
	withModel(MODEL, "DONUTS").withConnection(new Function<Connection, Void>() {
	@Override
	public Void apply(Connection connection) {
	try {
	final Statement statement = connection.prepareStatement("select * from donuts");
	statement.close();
	return null;
	} catch (Exception e) {
	throw new RuntimeException(e);
	}
	}
	});
	}

	/** Simple query against JSON. */
	@Test
	public void testSelectJson() throws Exception {
	withModel(MODEL, "DONUTS").sql("select * from donuts").returns(EXPECTED);
	}

	/** Simple query against EMP table in HR database. */
	@Test
	public void testSelectEmployees() throws Exception {
	withModel(MODEL, "HR")
	.sql("select * from employees")
	.returns(
	"_MAP={deptId=31, lastName=Rafferty}\n" + "_MAP={deptId=33, lastName=Jones}\n"
	+ "_MAP={deptId=33, lastName=Steinberg}\n" + "_MAP={deptId=34, lastName=Robinson}\n"
	+ "_MAP={deptId=34, lastName=Smith}\n" + "_MAP={lastName=John}\n");
	}

	/** Simple query against EMP table in HR database. */
	@Test
	public void testSelectEmpView() throws Exception {
	withModel(MODEL, "HR")
	.sql("select * from emp")
	.returns(
	"DEPTID=31; LASTNAME=Rafferty\n" + "DEPTID=33; LASTNAME=Jones\n" + "DEPTID=33; LASTNAME=Steinberg\n"
	+ "DEPTID=34; LASTNAME=Robinson\n" + "DEPTID=34; LASTNAME=Smith\n" + "DEPTID=null; LASTNAME=John\n");
	}

	/** Simple query against EMP table in HR database. */
	@Test
	public void testSelectDept() throws Exception {
	withModel(MODEL, "HR")
	.sql("select * from departments")
	.returns(
	"_MAP={deptId=31, name=Sales}\n" + "_MAP={deptId=33, name=Engineering}\n"
	+ "_MAP={deptId=34, name=Clerical}\n" + "_MAP={deptId=35, name=Marketing}\n");
	}

	/** Query with project list. No field references yet. */
	@Test
	public void testProjectConstant() throws Exception {
	withModel(MODEL, "DONUTS").sql("select 1 + 3 as c from donuts")
	.returns("C=4\n" + "C=4\n" + "C=4\n" + "C=4\n" + "C=4\n");
	}

	/** Query that projects an element from the map. */
	@Test
	public void testProject() throws Exception {
	withModel(MODEL, "DONUTS").sql("select _MAP['ppu'] as ppu from donuts")
	.returns("PPU=0.55\n" + "PPU=0.69\n" + "PPU=0.55\n" + "PPU=0.69\n" + "PPU=1.0\n");
	}

	/** Same logic as {@link #testProject()}, but using a subquery. */
	@Test
	public void testProjectOnSubquery() throws Exception {
	withModel(MODEL, "DONUTS").sql("select d['ppu'] as ppu from (\n" + " select _MAP as d from donuts)")
	.returns("PPU=0.55\n" + "PPU=0.69\n" + "PPU=0.55\n" + "PPU=0.69\n" + "PPU=1.0\n");
	}

	/** Checks the logical plan. */
	@Test
	public void testProjectPlan() throws Exception {
	LogicalPlan plan = withModel(MODEL, "DONUTS")
	.sql("select _MAP['ppu'] as ppu from donuts")
	.logicalPlan();

	PlanProperties planProperties = plan.getProperties();
	Assert.assertEquals("optiq", planProperties.generator.type);
	Assert.assertEquals("na", planProperties.generator.info);
	Assert.assertEquals(1, planProperties.version);
	Assert.assertEquals(PlanProperties.PlanType.APACHE_DRILL_LOGICAL, planProperties.type);
	Map<String, StoragePluginConfig> seConfigs = plan.getStorageEngines();
	StoragePluginConfig config = seConfigs.get("donuts-json");
	// Assert.assertTrue(config != null && config instanceof ClasspathRSE.ClasspathRSEConfig);
	config = seConfigs.get("queue");
	// Assert.assertTrue(config != null && config instanceof QueueRSE.QueueRSEConfig);
	Scan scan = findOnlyOperator(plan, Scan.class);
	Assert.assertEquals("donuts-json", scan.getStorageEngine());
	Project project = findOnlyOperator(plan, Project.class);
	Assert.assertEquals(1, project.getSelections().size());
	Assert.assertEquals(Scan.class, project.getInput().getClass());
	Store store = findOnlyOperator(plan, Store.class);
	Assert.assertEquals("queue", store.getStorageEngine());
	Assert.assertEquals("output sink", store.getMemo());
	Assert.assertEquals(Project.class, store.getInput().getClass());
	}

	/**
	* Query with subquery, filter, and projection of one real and one nonexistent field from a map field.
	*/
	@Test
	public void testProjectFilterSubquery() throws Exception {
	withModel(MODEL, "DONUTS")
	.sql(
	"select d['name'] as name, d['xx'] as xx from (\n" + " select _MAP as d from donuts)\n"
	+ "where cast(d['ppu'] as double) > 0.6")
	.returns("NAME=Raised; XX=null\n" + "NAME=Filled; XX=null\n" + "NAME=Apple Fritter; XX=null\n");
	}

	private static <T extends LogicalOperator> Iterable<T> findOperator(LogicalPlan plan, final Class<T> operatorClazz) {
	return (Iterable<T>) Iterables.filter(plan.getSortedOperators(), new Predicate<LogicalOperator>() {
	@Override
	public boolean apply(LogicalOperator input) {
	return input.getClass().equals(operatorClazz);
	}
	});
	}

	private static <T extends LogicalOperator> T findOnlyOperator(LogicalPlan plan, final Class<T> operatorClazz) {
	return Iterables.getOnlyElement(findOperator(plan, operatorClazz));
	}

	@Test
	public void testProjectFilterSubqueryPlan() throws Exception {
	LogicalPlan plan = withModel(MODEL, "DONUTS")
	.sql(
	"select d['name'] as name, d['xx'] as xx from (\n" + " select _MAP['donuts'] as d from donuts)\n"
	+ "where cast(d['ppu'] as double) > 0.6")
	.logicalPlan();
	PlanProperties planProperties = plan.getProperties();
	Assert.assertEquals("optiq", planProperties.generator.type);
	Assert.assertEquals("na", planProperties.generator.info);
	Assert.assertEquals(1, planProperties.version);
	Assert.assertEquals(PlanProperties.PlanType.APACHE_DRILL_LOGICAL, planProperties.type);
	Map<String, StoragePluginConfig> seConfigs = plan.getStorageEngines();
	StoragePluginConfig config = seConfigs.get("donuts-json");
	// Assert.assertTrue(config != null && config instanceof ClasspathRSE.ClasspathRSEConfig);
	config = seConfigs.get("queue");
	// Assert.assertTrue(config != null && config instanceof QueueRSE.QueueRSEConfig);
	Scan scan = findOnlyOperator(plan, Scan.class);
	Assert.assertEquals("donuts-json", scan.getStorageEngine());
	Filter filter = findOnlyOperator(plan, Filter.class);
	Assert.assertTrue(filter.getInput() instanceof Scan);
	Project[] projects = Iterables.toArray(findOperator(plan, Project.class), Project.class);
	Assert.assertEquals(2, projects.length);
	Assert.assertEquals(1, projects[0].getSelections().size());
	Assert.assertEquals(Filter.class, projects[0].getInput().getClass());
	Assert.assertEquals(2, projects[1].getSelections().size());
	Assert.assertEquals(Project.class, projects[1].getInput().getClass());
	Store store = findOnlyOperator(plan, Store.class);
	Assert.assertEquals("queue", store.getStorageEngine());
	Assert.assertEquals("output sink", store.getMemo());
	Assert.assertEquals(Project.class, store.getInput().getClass());
	}

	/** Query that projects one field. (Disabled; uses sugared syntax.) */
	@Test @Ignore
	public void testProjectNestedFieldSugared() throws Exception {
	withModel(MODEL, "DONUTS").sql("select donuts.ppu from donuts")
	.returns("C=4\n" + "C=4\n" + "C=4\n" + "C=4\n" + "C=4\n");
	}

	/** Query with filter. No field references yet. */
	@Test
	public void testFilterConstantFalse() throws Exception {
	withModel(MODEL, "DONUTS").sql("select * from donuts where 3 > 4").returns("");
	}

	@Test
	public void testFilterConstant() throws Exception {
	withModel(MODEL, "DONUTS").sql("select * from donuts where 3 < 4").returns(EXPECTED);
	}


	@Ignore
	@Test
	public void testValues() throws Exception {
	withModel(MODEL, "DONUTS").sql("values (1)").returns("EXPR$0=1\n");

	// Enable when https://issues.apache.org/jira/browse/DRILL-57 fixed
	// .planContains("store");
	}

	@Test
	public void testJoin() throws Exception {
	Join join = withModel(MODEL, "HR")
	.sql("select * from emp join dept on emp.deptId = dept.deptId")
	.returnsUnordered("DEPTID=31; LASTNAME=Rafferty; DEPTID0=31; NAME=Sales",
	"DEPTID=33; LASTNAME=Jones; DEPTID0=33; NAME=Engineering",
	"DEPTID=33; LASTNAME=Steinberg; DEPTID0=33; NAME=Engineering",
	"DEPTID=34; LASTNAME=Robinson; DEPTID0=34; NAME=Clerical",
	"DEPTID=34; LASTNAME=Smith; DEPTID0=34; NAME=Clerical").planContains(Join.class);
	Assert.assertEquals(JoinRelType.INNER, join.getJoinType());
	}

	@Test
	public void testLeftJoin() throws Exception {
	Join join = withModel(MODEL, "HR")
	.sql("select * from emp left join dept on emp.deptId = dept.deptId")
	.returnsUnordered("DEPTID=31; LASTNAME=Rafferty; DEPTID0=31; NAME=Sales",
	"DEPTID=33; LASTNAME=Jones; DEPTID0=33; NAME=Engineering",
	"DEPTID=33; LASTNAME=Steinberg; DEPTID0=33; NAME=Engineering",
	"DEPTID=34; LASTNAME=Robinson; DEPTID0=34; NAME=Clerical",
	"DEPTID=34; LASTNAME=Smith; DEPTID0=34; NAME=Clerical",
	"DEPTID=null; LASTNAME=John; DEPTID0=null; NAME=null").planContains(Join.class);
	Assert.assertEquals(JoinRelType.LEFT, join.getJoinType());
	}

	/**
	* Right join is tricky because Drill's "join" operator only supports "left", so we have to flip inputs.
	*/
	@Test @Ignore
	public void testRightJoin() throws Exception {
	Join join = withModel(MODEL, "HR").sql("select * from emp right join dept on emp.deptId = dept.deptId")
	.returnsUnordered("xx").planContains(Join.class);
	Assert.assertEquals(JoinRelType.LEFT, join.getJoinType());
	}

	@Test
	public void testFullJoin() throws Exception {
	Join join = withModel(MODEL, "HR")
	.sql("select * from emp full join dept on emp.deptId = dept.deptId")
	.returnsUnordered("DEPTID=31; LASTNAME=Rafferty; DEPTID0=31; NAME=Sales",
	"DEPTID=33; LASTNAME=Jones; DEPTID0=33; NAME=Engineering",
	"DEPTID=33; LASTNAME=Steinberg; DEPTID0=33; NAME=Engineering",
	"DEPTID=34; LASTNAME=Robinson; DEPTID0=34; NAME=Clerical",
	"DEPTID=34; LASTNAME=Smith; DEPTID0=34; NAME=Clerical",
	"DEPTID=null; LASTNAME=John; DEPTID0=null; NAME=null",
	"DEPTID=null; LASTNAME=null; DEPTID0=35; NAME=Marketing").planContains(Join.class);
	Assert.assertEquals(JoinRelType.FULL, join.getJoinType());
	}

	/**
	* Join on subquery; also tests that if a field of the same name exists in both inputs, both fields make it through
	* the join.
	*/
	@Test
	public void testJoinOnSubquery() throws Exception {
	Join join = withModel(MODEL, "HR")
	.sql(
	"select * from (\n" + "select deptId, lastname, 'x' as name from emp) as e\n"
	+ " join dept on e.deptId = dept.deptId")
	.returnsUnordered("DEPTID=31; LASTNAME=Rafferty; NAME=x; DEPTID0=31; NAME0=Sales",
	"DEPTID=33; LASTNAME=Jones; NAME=x; DEPTID0=33; NAME0=Engineering",
	"DEPTID=33; LASTNAME=Steinberg; NAME=x; DEPTID0=33; NAME0=Engineering",
	"DEPTID=34; LASTNAME=Robinson; NAME=x; DEPTID0=34; NAME0=Clerical",
	"DEPTID=34; LASTNAME=Smith; NAME=x; DEPTID0=34; NAME0=Clerical").planContains(Join.class);
	Assert.assertEquals(JoinRelType.INNER, join.getJoinType());
	}

	/** Tests that one of the FoodMart tables is present. */
	@Test @Ignore
	public void testFoodMart() throws Exception {
	withModel(MODEL, "FOODMART")
	.sql("select * from product_class where cast(_map['product_class_id'] as integer) < 3")
	.returnsUnordered(
	"_MAP={product_category=Seafood, product_class_id=2, product_department=Seafood, product_family=Food, product_subcategory=Shellfish}",
	"_MAP={product_category=Specialty, product_class_id=1, product_department=Produce, product_family=Food, product_subcategory=Nuts}");
	}

	@Test
	public void testUnionAll() throws Exception {
	Union union = withModel(MODEL, "HR")
	.sql("select deptId from dept\n" + "union all\n" + "select deptId from emp")
	.returnsUnordered("DEPTID=31", "DEPTID=33", "DEPTID=34", "DEPTID=35", "DEPTID=null")
	.planContains(Union.class);
	Assert.assertFalse(union.isDistinct());
	}

	@Test
	public void testUnion() throws Exception {
	Union union = withModel(MODEL, "HR")
	.sql("select deptId from dept\n" + "union\n" + "select deptId from emp")
	.returnsUnordered("DEPTID=31", "DEPTID=33", "DEPTID=34", "DEPTID=35", "DEPTID=null")
	.planContains(Union.class);
	Assert.assertTrue(union.isDistinct());
	}

	@Test
	public void testOrderByDescNullsFirst() throws Exception {
	// desc nulls last
	withModel(MODEL, "HR")
	.sql("select * from emp order by deptId desc nulls first")
	.returns(
	"DEPTID=null; LASTNAME=John\n" + "DEPTID=34; LASTNAME=Robinson\n" + "DEPTID=34; LASTNAME=Smith\n"
	+ "DEPTID=33; LASTNAME=Jones\n" + "DEPTID=33; LASTNAME=Steinberg\n" + "DEPTID=31; LASTNAME=Rafferty\n")
	.planContains(Order.class);
	}

	@Test
	public void testOrderByDescNullsLast() throws Exception {
	// desc nulls first
	withModel(MODEL, "HR")
	.sql("select * from emp order by deptId desc nulls last")
	.returns(
	"DEPTID=34; LASTNAME=Robinson\n" + "DEPTID=34; LASTNAME=Smith\n" + "DEPTID=33; LASTNAME=Jones\n"
	+ "DEPTID=33; LASTNAME=Steinberg\n" + "DEPTID=31; LASTNAME=Rafferty\n" + "DEPTID=null; LASTNAME=John\n")
	.planContains(Order.class);
	}

	@Test @Ignore
	public void testOrderByDesc() throws Exception {
	// desc is implicitly "nulls first" (i.e. null sorted as +inf)
	// Current behavior is to sort nulls last. This is wrong.
	withModel(MODEL, "HR")
	.sql("select * from emp order by deptId desc")
	.returns(
	"DEPTID=null; LASTNAME=John\n" + "DEPTID=34; LASTNAME=Robinson\n" + "DEPTID=34; LASTNAME=Smith\n"
	+ "DEPTID=33; LASTNAME=Jones\n" + "DEPTID=33; LASTNAME=Steinberg\n" + "DEPTID=31; LASTNAME=Rafferty\n")
	.planContains(Order.class);
	}

	@Test
	public void testOrderBy() throws Exception {
	// no sort order specified is implicitly "asc", and asc is "nulls last"
	withModel(MODEL, "HR")
	.sql("select * from emp order by deptId")
	.returns(
	"DEPTID=31; LASTNAME=Rafferty\n"
	+ "DEPTID=33; LASTNAME=Jones\n"
	+ "DEPTID=33; LASTNAME=Steinberg\n"
	+ "DEPTID=34; LASTNAME=Robinson\n"
	+ "DEPTID=34; LASTNAME=Smith\n"
	+ "DEPTID=null; LASTNAME=John\n")
	.planContains(Order.class);
	}

	@Test
	public void testLimit() throws Exception {
	withModel(MODEL, "HR")
	.sql("select LASTNAME from emp limit 2")
	.returns("LASTNAME=Rafferty\n" +
	"LASTNAME=Jones")
	.planContains(Limit.class);
	}


	@Test
	public void testLimitOrderBy() throws Exception {
	TestDataConnection tdc = withModel(MODEL, "HR")
	.sql("select LASTNAME from emp order by LASTNAME limit 2")
	.returns("LASTNAME=John\n" +
	"LASTNAME=Jones");
	tdc.planContains(Limit.class);
	tdc.planContains(Order.class);

	}

	@Test
	public void testOrderByWithOffset() throws Exception {
	withModel(MODEL, "HR")
	.sql("select LASTNAME from emp order by LASTNAME asc offset 3")
	.returns("LASTNAME=Robinson\n" +
	"LASTNAME=Smith\n" +
	"LASTNAME=Steinberg")
	.planContains(Limit.class);

	}

	@Test
	public void testOrderByWithOffsetAndFetch() throws Exception {
	withModel(MODEL, "HR")
	.sql("select LASTNAME from emp order by LASTNAME asc offset 3 fetch next 2 rows only")
	.returns("LASTNAME=Robinson\n" +
	"LASTNAME=Smith")
	.planContains(Limit.class);
	}
	}