| /* |
| * 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.v3.lifecycle; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertSame; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.fail; |
| |
| import org.apache.drill.categories.EvfTest; |
| import org.apache.drill.common.exceptions.UserException; |
| import org.apache.drill.exec.physical.impl.scan.RowBatchReader; |
| import org.apache.drill.exec.physical.impl.scan.v3.ManagedReader; |
| import org.apache.drill.exec.physical.impl.scan.v3.ScanLifecycleBuilder; |
| import org.apache.drill.exec.physical.impl.scan.v3.SchemaNegotiator; |
| import org.apache.drill.exec.physical.impl.scan.v3.schema.ScanSchemaTracker.ProjectionType; |
| import org.apache.drill.exec.physical.rowSet.RowSet; |
| import org.apache.drill.exec.record.metadata.SchemaBuilder; |
| import org.apache.drill.exec.record.metadata.TupleMetadata; |
| import org.apache.drill.test.rowSet.RowSetUtilities; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| |
| @Category(EvfTest.class) |
| public class TestScanLifecycleSchema extends BaseTestScanLifecycle { |
| |
| /** |
| * Simplest defined schema case: the defined schema agrees |
| * with the the schema the reader will produce. The defined schema |
| * implies the project list, which is not visible here. |
| */ |
| @Test |
| public void testDefinedSchemaSimple() { |
| ScanLifecycleBuilder builder = new ScanLifecycleBuilder(); |
| builder.definedSchema(SCHEMA); |
| builder.readerFactory(new SingleReaderFactory() { |
| @Override |
| public ManagedReader next(SchemaNegotiator negotiator) { |
| return new MockEarlySchemaReader(negotiator, 1); |
| } |
| }); |
| ScanLifecycle scan = buildScan(builder); |
| |
| // Projection defaults to SELECT *, but defined schema |
| // overrides that setting. |
| assertSame(ProjectionType.SOME, scan.schemaTracker().projectionType()); |
| |
| verifyStandardReader(scan, 0); |
| scan.close(); |
| } |
| |
| /** |
| * The defined schema is a subset of the reader's schema; the |
| * defined schema acts as a project list. |
| */ |
| @Test |
| public void testDefinedSchemaSubset() { |
| ScanLifecycleBuilder builder = new ScanLifecycleBuilder(); |
| builder.definedSchema(SCHEMA); |
| builder.readerFactory(new SingleReaderFactory() { |
| @Override |
| public ManagedReader next(SchemaNegotiator negotiator) { |
| return new MockThreeColReader(negotiator); |
| } |
| }); |
| ScanLifecycle scan = buildScan(builder); |
| |
| RowBatchReader reader = scan.nextReader(); |
| assertTrue(reader.open()); |
| assertEquals(SCHEMA, scan.outputSchema()); |
| assertTrue(reader.next()); |
| RowSet expected = fixture.rowSetBuilder(SCHEMA) |
| .addRow(101, "wilma") |
| .addRow(102, "betty") |
| .build(); |
| RowSetUtilities.verify(expected, fixture.wrap(reader.output())); |
| assertFalse(reader.next()); |
| reader.close(); |
| |
| scan.close(); |
| } |
| |
| /** |
| * The defined schema is a superset of the reader's schema; the |
| * defined schema defines the missing column type. |
| */ |
| @Test |
| public void testDefinedSchemaSupersset() { |
| ScanLifecycleBuilder builder = new ScanLifecycleBuilder(); |
| builder.definedSchema(SCHEMA); |
| builder.readerFactory(new SingleReaderFactory() { |
| @Override |
| public ManagedReader next(SchemaNegotiator negotiator) { |
| return new MockSingleColReader(negotiator); |
| } |
| }); |
| ScanLifecycle scan = buildScan(builder); |
| |
| RowBatchReader reader = scan.nextReader(); |
| assertTrue(reader.open()); |
| assertEquals(SCHEMA, scan.outputSchema()); |
| assertTrue(reader.next()); |
| RowSet expected = fixture.rowSetBuilder(SCHEMA) |
| .addRow(101, null) |
| .addRow(102, null) |
| .build(); |
| RowSetUtilities.verify(expected, fixture.wrap(reader.output())); |
| assertFalse(reader.next()); |
| reader.close(); |
| |
| scan.close(); |
| } |
| |
| /** |
| * Reader produces a schema which conflicts with the defined schema. |
| * The defined schema should be something the reader can implement; so |
| * it is an error if the reader does not do so. |
| */ |
| @Test |
| public void testDefinedSchemaConflict() { |
| ScanLifecycleBuilder builder = new ScanLifecycleBuilder(); |
| builder.definedSchema(SCHEMA); |
| builder.readerFactory(new SingleReaderFactory() { |
| @Override |
| public ManagedReader next(SchemaNegotiator negotiator) { |
| return new MockEarlySchemaTypeConflictReader(negotiator); |
| } |
| }); |
| ScanLifecycle scan = buildScan(builder); |
| |
| RowBatchReader reader = scan.nextReader(); |
| try { |
| reader.open(); |
| fail(); |
| } catch (UserException e) { |
| assertTrue(e.getMessage().contains("conflict")); |
| } |
| reader.close(); |
| scan.close(); |
| } |
| |
| /** |
| * Simplest provided schema case: the defined schema agrees |
| * with the the schema the reader will produce. The provided schema |
| * is separate from the project list. |
| */ |
| @Test |
| public void testProvidedSchemaSimple() { |
| ScanLifecycleBuilder builder = new ScanLifecycleBuilder(); |
| builder.providedSchema(SCHEMA); |
| builder.readerFactory(new SingleReaderFactory() { |
| @Override |
| public ManagedReader next(SchemaNegotiator negotiator) { |
| return new MockEarlySchemaReader(negotiator, 1); |
| } |
| }); |
| ScanLifecycle scan = buildScan(builder); |
| assertSame(ProjectionType.ALL, scan.schemaTracker().projectionType()); |
| |
| verifyStandardReader(scan, 0); |
| scan.close(); |
| } |
| |
| /** |
| * Lenient provided schema which is a subset of the reader's schema; the |
| * provided schema agrees with the reader types |
| */ |
| @Test |
| public void testLenientProvidedSchemaSubset() { |
| ScanLifecycleBuilder builder = new ScanLifecycleBuilder(); |
| builder.providedSchema(SCHEMA); |
| builder.readerFactory(new SingleReaderFactory() { |
| @Override |
| public ManagedReader next(SchemaNegotiator negotiator) { |
| return new MockThreeColReader(negotiator); |
| } |
| }); |
| ScanLifecycle scan = buildScan(builder); |
| assertSame(ProjectionType.ALL, scan.schemaTracker().projectionType()); |
| |
| RowBatchReader reader = scan.nextReader(); |
| assertTrue(reader.open()); |
| assertEquals(MockThreeColReader.READER_SCHEMA, scan.outputSchema()); |
| assertTrue(reader.next()); |
| RowSet expected = fixture.rowSetBuilder(MockThreeColReader.READER_SCHEMA) |
| .addRow(101, "wilma", 1001) |
| .addRow(102, "betty", 1002) |
| .build(); |
| RowSetUtilities.verify(expected, fixture.wrap(reader.output())); |
| assertFalse(reader.next()); |
| reader.close(); |
| |
| scan.close(); |
| } |
| |
| /** |
| * Lenient provided schema which is a subset of the reader's schema; the |
| * provided schema agrees with the reader types |
| */ |
| @Test |
| public void testStrictProvidedSchemaSubset() { |
| TupleMetadata schema = new SchemaBuilder() |
| .addAll(SCHEMA) |
| .build(); |
| schema.setBooleanProperty(TupleMetadata.IS_STRICT_SCHEMA_PROP, true); |
| ScanLifecycleBuilder builder = new ScanLifecycleBuilder(); |
| builder.providedSchema(schema); |
| builder.readerFactory(new SingleReaderFactory() { |
| @Override |
| public ManagedReader next(SchemaNegotiator negotiator) { |
| return new MockThreeColReader(negotiator); |
| } |
| }); |
| ScanLifecycle scan = buildScan(builder); |
| |
| RowBatchReader reader = scan.nextReader(); |
| assertTrue(reader.open()); |
| assertEquals(SCHEMA, scan.outputSchema()); |
| assertTrue(reader.next()); |
| RowSet expected = fixture.rowSetBuilder(SCHEMA) |
| .addRow(101, "wilma") |
| .addRow(102, "betty") |
| .build(); |
| RowSetUtilities.verify(expected, fixture.wrap(reader.output())); |
| assertFalse(reader.next()); |
| reader.close(); |
| |
| scan.close(); |
| } |
| } |