| /* |
| * 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.exec.physical.impl.scan; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.drill.categories.RowSetTest; |
| import org.apache.drill.common.expression.SchemaPath; |
| import org.apache.drill.common.types.TypeProtos.MinorType; |
| import org.apache.drill.exec.physical.impl.scan.ScanTestUtils.ScanFixture; |
| import org.apache.drill.exec.physical.impl.scan.ScanTestUtils.ScanFixtureBuilder; |
| import org.apache.drill.exec.physical.impl.scan.TestFileScanFramework.DummyFileWork; |
| import org.apache.drill.exec.physical.impl.scan.columns.ColumnsScanFramework; |
| import org.apache.drill.exec.physical.impl.scan.columns.ColumnsScanFramework.ColumnsScanBuilder; |
| import org.apache.drill.exec.physical.impl.scan.columns.ColumnsSchemaNegotiator; |
| import org.apache.drill.exec.physical.impl.scan.file.FileScanFramework.FileReaderFactory; |
| import org.apache.drill.exec.physical.impl.scan.file.FileScanFramework.FileSchemaNegotiator; |
| import org.apache.drill.exec.physical.impl.scan.framework.ManagedReader; |
| import org.apache.drill.exec.physical.impl.scan.framework.ManagedScanFramework.ScanFrameworkBuilder; |
| import org.apache.drill.exec.physical.rowSet.RowSetTestUtils; |
| import org.apache.drill.exec.record.metadata.SchemaBuilder; |
| import org.apache.drill.exec.record.metadata.TupleMetadata; |
| import org.apache.drill.exec.store.dfs.easy.FileWork; |
| import com.google.common.collect.Lists; |
| import org.apache.drill.test.SubOperatorTest; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.Path; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertNotNull; |
| import static org.junit.Assert.assertNull; |
| import static org.junit.Assert.assertTrue; |
| |
| |
| /** |
| * Test the columns-array specific behavior in the columns scan framework. |
| */ |
| @Category(RowSetTest.class) |
| public class TestColumnsArrayFramework extends SubOperatorTest { |
| |
| private static final Path MOCK_FILE_PATH = new Path("file:/w/x/y/z.csv"); |
| |
| public static class MockFileReaderFactory extends FileReaderFactory { |
| public Iterator<DummyColumnsReader> readerIter; |
| |
| public MockFileReaderFactory(List<DummyColumnsReader> readers) { |
| readerIter = readers.iterator(); |
| } |
| |
| @Override |
| public ManagedReader<? extends FileSchemaNegotiator> newReader() { |
| DummyColumnsReader reader = readerIter.next(); |
| assert reader != null; |
| return reader; |
| } |
| } |
| |
| public static class ColumnsScanFixtureBuilder extends ScanFixtureBuilder { |
| |
| public ColumnsScanBuilder builder = new ColumnsScanBuilder(); |
| public List<DummyColumnsReader> readers = new ArrayList<>(); |
| |
| public ColumnsScanFixtureBuilder() { |
| super(fixture); |
| } |
| |
| @Override |
| public ScanFrameworkBuilder builder() { return builder; } |
| |
| public void addReader(DummyColumnsReader reader) { |
| readers.add(reader); |
| } |
| |
| @Override |
| public ScanFixture build() { |
| |
| // Bass-ackward construction of the list of files from |
| // a set of text fixture readers. Normal implementations |
| // create readers from file splits, not the other way around |
| // as is done here. |
| |
| List<FileWork> blocks = new ArrayList<>(); |
| for (DummyColumnsReader reader : readers) { |
| blocks.add(new DummyFileWork(reader.filePath())); |
| } |
| builder.setFileSystemConfig(new Configuration()); |
| builder.setFiles(blocks); |
| builder.setReaderFactory(new MockFileReaderFactory(readers)); |
| return super.build(); |
| } |
| } |
| |
| public static class DummyColumnsReader implements ManagedReader<ColumnsSchemaNegotiator> { |
| |
| public TupleMetadata schema; |
| public ColumnsSchemaNegotiator negotiator; |
| int nextCount; |
| protected Path filePath = MOCK_FILE_PATH; |
| |
| public DummyColumnsReader(TupleMetadata schema) { |
| this.schema = schema; |
| } |
| |
| public Path filePath() { return filePath; } |
| |
| @Override |
| public boolean open(ColumnsSchemaNegotiator negotiator) { |
| this.negotiator = negotiator; |
| negotiator.tableSchema(schema, true); |
| negotiator.build(); |
| return true; |
| } |
| |
| @Override |
| public boolean next() { |
| return nextCount++ == 0; |
| } |
| |
| @Override |
| public void close() { } |
| } |
| |
| /** |
| * Test including a column other than "columns". Occurs when |
| * using implicit columns. |
| */ |
| @Test |
| public void testNonColumnsProjection() { |
| |
| // Create a mock reader, return two batches: one schema-only, another with data. |
| |
| DummyColumnsReader reader = new DummyColumnsReader( |
| new SchemaBuilder() |
| .add("a", MinorType.VARCHAR) |
| .buildSchema()); |
| |
| // Create the scan operator |
| |
| ColumnsScanFixtureBuilder builder = new ColumnsScanFixtureBuilder(); |
| builder.projectAll(); |
| builder.addReader(reader); |
| ScanFixture scanFixture = builder.build(); |
| ScanOperatorExec scan = scanFixture.scanOp; |
| |
| // Start the one and only reader, and check the columns |
| // schema info. |
| |
| assertTrue(scan.buildSchema()); |
| assertNotNull(reader.negotiator); |
| assertFalse(reader.negotiator.columnsArrayProjected()); |
| assertNull(reader.negotiator.projectedIndexes()); |
| |
| scanFixture.close(); |
| } |
| |
| /** |
| * Test projecting just the `columns` column. |
| */ |
| @Test |
| public void testColumnsProjection() { |
| |
| // Create a mock reader, return two batches: one schema-only, another with data. |
| |
| DummyColumnsReader reader = new DummyColumnsReader( |
| new SchemaBuilder() |
| .addArray(ColumnsScanFramework.COLUMNS_COL, MinorType.VARCHAR) |
| .buildSchema()); |
| |
| // Create the scan operator |
| |
| ColumnsScanFixtureBuilder builder = new ColumnsScanFixtureBuilder(); |
| builder.setProjection(RowSetTestUtils.projectList(ColumnsScanFramework.COLUMNS_COL)); |
| builder.addReader(reader); |
| builder.builder.requireColumnsArray(true); |
| ScanFixture scanFixture = builder.build(); |
| ScanOperatorExec scan = scanFixture.scanOp; |
| |
| // Start the one and only reader, and check the columns |
| // schema info. |
| |
| assertTrue(scan.buildSchema()); |
| assertNotNull(reader.negotiator); |
| assertTrue(reader.negotiator.columnsArrayProjected()); |
| assertNull(reader.negotiator.projectedIndexes()); |
| |
| scanFixture.close(); |
| } |
| |
| /** |
| * Test including a specific index of `columns` such as |
| * `columns`[1]. |
| */ |
| @Test |
| public void testColumnsIndexProjection() { |
| |
| // Create a mock reader, return two batches: one schema-only, another with data. |
| |
| DummyColumnsReader reader = new DummyColumnsReader( |
| new SchemaBuilder() |
| .addArray(ColumnsScanFramework.COLUMNS_COL, MinorType.VARCHAR) |
| .buildSchema()); |
| |
| // Create the scan operator |
| |
| ColumnsScanFixtureBuilder builder = new ColumnsScanFixtureBuilder(); |
| builder.setProjection(Lists.newArrayList( |
| SchemaPath.parseFromString(ColumnsScanFramework.COLUMNS_COL + "[1]"), |
| SchemaPath.parseFromString(ColumnsScanFramework.COLUMNS_COL + "[3]"))); |
| builder.addReader(reader); |
| builder.builder.requireColumnsArray(true); |
| ScanFixture scanFixture = builder.build(); |
| ScanOperatorExec scan = scanFixture.scanOp; |
| |
| // Start the one and only reader, and check the columns |
| // schema info. |
| |
| assertTrue(scan.buildSchema()); |
| assertNotNull(reader.negotiator); |
| assertTrue(reader.negotiator.columnsArrayProjected()); |
| boolean projIndexes[] = reader.negotiator.projectedIndexes(); |
| assertNotNull(projIndexes); |
| assertEquals(4, projIndexes.length); |
| assertFalse(projIndexes[0]); |
| assertTrue(projIndexes[1]); |
| assertFalse(projIndexes[2]); |
| assertTrue(projIndexes[3]); |
| |
| scanFixture.close(); |
| } |
| } |