/*
* 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;
import com.facebook.presto.operator.PagesIndex;
import com.facebook.presto.spi.Page;
import com.facebook.presto.spi.PageBuilder;
import com.facebook.presto.spi.block.SortOrder;
import com.facebook.presto.spi.type.Type;
import com.facebook.presto.testing.MaterializedResult;
import com.google.common.collect.ImmutableList;
import com.google.common.primitives.Ints;
import org.testng.annotations.Test;
import java.util.Collections;
import java.util.List;
import static com.facebook.presto.SessionTestUtils.TEST_SESSION;
import static com.facebook.presto.operator.OperatorAssertion.toMaterializedResult;
import static com.facebook.presto.spi.block.SortOrder.ASC_NULLS_FIRST;
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.VarcharType.VARCHAR;
import static org.testng.Assert.assertEquals;
public class TestPagesIndexPageSorter
{
private static final PagesIndexPageSorter sorter = new PagesIndexPageSorter(new PagesIndex.TestingFactory());
@Test
public void testPageSorter()
throws Exception
{
List<Type> types = ImmutableList.of(BIGINT, DOUBLE, VARCHAR);
List<Integer> sortChannels = Ints.asList(0);
List<SortOrder> sortOrders = ImmutableList.of(ASC_NULLS_FIRST);
List<Page> inputPages = RowPagesBuilder.rowPagesBuilder(types)
.row(2L, 1.1, "d")
.row(1L, 2.2, "c")
.pageBreak()
.row(-2L, 2.2, "b")
.row(-12L, 2.2, "a")
.build();
List<Page> expectedPages = RowPagesBuilder.rowPagesBuilder(types)
.row(-12L, 2.2, "a")
.row(-2L, 2.2, "b")
.pageBreak()
.row(1L, 2.2, "c")
.row(2L, 1.1, "d")
.build();
assertSorted(inputPages, expectedPages, types, sortChannels, sortOrders, 100);
}
@Test
public void testPageSorterMultipleChannels()
throws Exception
{
List<Type> types = ImmutableList.of(BIGINT, DOUBLE, VARCHAR);
List<Integer> sortChannels = Ints.asList(0, 1, 2);
List<SortOrder> sortOrders = Collections.nCopies(sortChannels.size(), ASC_NULLS_FIRST);
List<Page> inputPages = RowPagesBuilder.rowPagesBuilder(types)
.row(2L, 1.1, "d")
.row(1L, 2.2, "c")
.pageBreak()
.row(1L, 2.2, "b")
.row(1L, 2.2, "a")
.pageBreak()
.row(1L, 2.2, null)
.row(1L, null, "z")
.row(1L, null, null)
.build();
List<Page> expectedPages = RowPagesBuilder.rowPagesBuilder(types)
.row(1L, null, null)
.row(1L, null, "z")
.row(1L, 2.2, null)
.row(1L, 2.2, "a")
.row(1L, 2.2, "b")
.row(1L, 2.2, "c")
.row(2L, 1.1, "d")
.build();
assertSorted(inputPages, expectedPages, types, sortChannels, sortOrders, 100);
}
@Test
public void testPageSorterSorted()
throws Exception
{
List<Type> types = ImmutableList.of(BIGINT, DOUBLE, VARCHAR);
List<Integer> sortChannels = Ints.asList(0);
List<SortOrder> sortOrders = ImmutableList.of(ASC_NULLS_FIRST);
List<Page> inputPages = RowPagesBuilder.rowPagesBuilder(types)
.row(-12L, 2.2, "a")
.row(-2L, 2.2, "b")
.pageBreak()
.row(1L, 2.2, "d")
.row(2L, 1.1, "c")
.build();
List<Page> expectedPages = RowPagesBuilder.rowPagesBuilder(types)
.row(-12L, 2.2, "a")
.row(-2L, 2.2, "b")
.row(1L, 2.2, "d")
.row(2L, 1.1, "c")
.build();
assertSorted(inputPages, expectedPages, types, sortChannels, sortOrders, 100);
}
@Test
public void testPageSorterForceExpansion()
throws Exception
{
List<Type> types = ImmutableList.of(BIGINT, DOUBLE, VARCHAR);
List<Integer> sortChannels = Ints.asList(0);
List<SortOrder> sortOrders = ImmutableList.of(ASC_NULLS_FIRST);
List<Page> inputPages = RowPagesBuilder.rowPagesBuilder(types)
.row(2L, 1.1, "c")
.row(1L, 2.2, "d")
.pageBreak()
.row(-2L, 2.2, "b")
.row(-12L, 2.2, "a")
.build();
List<Page> expectedPages = RowPagesBuilder.rowPagesBuilder(types)
.row(-12L, 2.2, "a")
.row(-2L, 2.2, "b")
.pageBreak()
.row(1L, 2.2, "d")
.row(2L, 1.1, "c")
.build();
assertSorted(inputPages, expectedPages, types, sortChannels, sortOrders, 2);
}
private static void assertSorted(List<Page> inputPages, List<Page> expectedPages, List<Type> types, List<Integer> sortChannels, List<SortOrder> sortOrders, int expectedPositions)
{
long[] sortedAddresses = sorter.sort(types, inputPages, sortChannels, sortOrders, expectedPositions);
List<Page> outputPages = createOutputPages(types, inputPages, sortedAddresses);
MaterializedResult expected = toMaterializedResult(TEST_SESSION, types, expectedPages);
MaterializedResult actual = toMaterializedResult(TEST_SESSION, types, outputPages);
assertEquals(actual.getMaterializedRows(), expected.getMaterializedRows());
}
private static List<Page> createOutputPages(List<Type> types, List<Page> inputPages, long[] sortedAddresses)
{
PageBuilder pageBuilder = new PageBuilder(types);
pageBuilder.reset();
for (long address : sortedAddresses) {
int index = sorter.decodePageIndex(address);
int position = sorter.decodePositionIndex(address);
Page page = inputPages.get(index);
for (int i = 0; i < types.size(); i++) {
Type type = types.get(i);
type.appendTo(page.getBlock(i), position, pageBuilder.getBlockBuilder(i));
}
pageBuilder.declarePosition();
}
return ImmutableList.of(pageBuilder.build());
}
}