/*
* Licensed 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 com.facebook.presto.operator;
import com.facebook.presto.execution.TaskId;
import com.facebook.presto.operator.TopNOperator.TopNOperatorFactory;
import com.facebook.presto.spi.ConnectorSession;
import com.facebook.presto.util.MaterializedResult;
import com.google.common.base.Optional;
import com.google.common.collect.ImmutableList;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
import java.util.List;
import java.util.Locale;
import java.util.concurrent.ExecutorService;
import static com.facebook.presto.operator.OperatorAssertion.appendSampleWeight;
import static com.facebook.presto.operator.OperatorAssertion.assertOperatorEquals;
import static com.facebook.presto.operator.RowPagesBuilder.rowPagesBuilder;
import static com.facebook.presto.spi.block.SortOrder.ASC_NULLS_LAST;
import static com.facebook.presto.spi.block.SortOrder.DESC_NULLS_LAST;
import static com.facebook.presto.spi.type.BigintType.BIGINT;
import static com.facebook.presto.spi.type.DoubleType.DOUBLE;
import static com.facebook.presto.spi.type.TimeZoneKey.UTC_KEY;
import static com.facebook.presto.spi.type.VarcharType.VARCHAR;
import static com.facebook.presto.util.MaterializedResult.resultBuilder;
import static com.facebook.presto.util.Threads.daemonThreadsNamed;
import static java.util.concurrent.Executors.newCachedThreadPool;
@Test(singleThreaded = true)
public class TestTopNOperator
{
private ExecutorService executor;
private DriverContext driverContext;
@BeforeMethod
public void setUp()
{
executor = newCachedThreadPool(daemonThreadsNamed("test"));
ConnectorSession session = new ConnectorSession("user", "source", "catalog", "schema", UTC_KEY, Locale.ENGLISH, "address", "agent");
driverContext = new TaskContext(new TaskId("query", "stage", "task"), executor, session)
.addPipelineContext(true, true)
.addDriverContext();
}
@AfterMethod
public void tearDown()
{
executor.shutdownNow();
}
@Test
public void testSampledTopN()
throws Exception
{
List<Page> input = rowPagesBuilder(BIGINT, DOUBLE)
.row(1, 0.1)
.row(2, 0.2)
.pageBreak()
.row(-1, -0.1)
.row(4, 0.4)
.pageBreak()
.row(5, 0.5)
.row(4, 0.41)
.row(6, 0.6)
.row(5, 0.5)
.pageBreak()
.build();
input = appendSampleWeight(input, 2);
TopNOperatorFactory factory = new TopNOperatorFactory(
0,
ImmutableList.of(BIGINT, DOUBLE, BIGINT),
5,
ImmutableList.of(0),
ImmutableList.of(DESC_NULLS_LAST),
Optional.of(input.get(0).getChannelCount() - 1),
false);
Operator operator = factory.createOperator(driverContext);
MaterializedResult expected = resultBuilder(driverContext.getSession(), BIGINT, DOUBLE, BIGINT)
.row(6, 0.6, 2)
.row(5, 0.5, 1)
.row(5, 0.5, 2)
.build();
assertOperatorEquals(operator, input, expected);
}
@Test
public void testSingleFieldKey()
throws Exception
{
List<Page> input = rowPagesBuilder(BIGINT, DOUBLE)
.row(1, 0.1)
.row(2, 0.2)
.pageBreak()
.row(-1, -0.1)
.row(4, 0.4)
.pageBreak()
.row(5, 0.5)
.row(4, 0.41)
.row(6, 0.6)
.pageBreak()
.build();
TopNOperatorFactory factory = new TopNOperatorFactory(
0,
ImmutableList.of(BIGINT, DOUBLE),
2,
ImmutableList.of(0),
ImmutableList.of(DESC_NULLS_LAST),
Optional.<Integer>absent(),
false);
Operator operator = factory.createOperator(driverContext);
MaterializedResult expected = resultBuilder(driverContext.getSession(), BIGINT, DOUBLE)
.row(6, 0.6)
.row(5, 0.5)
.build();
assertOperatorEquals(operator, input, expected);
}
@Test
public void testMultiFieldKey()
throws Exception
{
List<Page> input = rowPagesBuilder(VARCHAR, BIGINT)
.row("a", 1)
.row("b", 2)
.pageBreak()
.row("f", 3)
.row("a", 4)
.pageBreak()
.row("d", 5)
.row("d", 7)
.row("e", 6)
.build();
TopNOperatorFactory operatorFactory = new TopNOperatorFactory(
0,
ImmutableList.of(VARCHAR, BIGINT),
3,
ImmutableList.of(0, 1),
ImmutableList.of(DESC_NULLS_LAST, DESC_NULLS_LAST),
Optional.<Integer>absent(),
false);
Operator operator = operatorFactory.createOperator(driverContext);
MaterializedResult expected = MaterializedResult.resultBuilder(driverContext.getSession(), VARCHAR, BIGINT)
.row("f", 3)
.row("e", 6)
.row("d", 7)
.build();
assertOperatorEquals(operator, input, expected);
}
@Test
public void testReverseOrder()
throws Exception
{
List<Page> input = rowPagesBuilder(BIGINT, DOUBLE)
.row(1, 0.1)
.row(2, 0.2)
.pageBreak()
.row(-1, -0.1)
.row(4, 0.4)
.pageBreak()
.row(5, 0.5)
.row(4, 0.41)
.row(6, 0.6)
.pageBreak()
.build();
TopNOperatorFactory operatorFactory = new TopNOperatorFactory(
0,
ImmutableList.of(BIGINT, DOUBLE),
2,
ImmutableList.of(0),
ImmutableList.of(ASC_NULLS_LAST),
Optional.<Integer>absent(),
false);
Operator operator = operatorFactory.createOperator(driverContext);
MaterializedResult expected = resultBuilder(driverContext.getSession(), BIGINT, DOUBLE)
.row(-1, -0.1)
.row(1, 0.1)
.build();
assertOperatorEquals(operator, input, expected);
}
}