Examples with ManagedReader org.apache.drill.exec.physical.impl.scan.v3.ManagedReader used on opensource projects

Example 16 with ManagedReader

use of org.apache.drill.exec.physical.impl.scan.v3.ManagedReader in project drill by apache.

the class TestScanLifecycleBasics method testEarlyEOF.

/**
 * Single reader, late schema, early EOF.
 * The scan never has a valid schema in this case.
 */
@Test
public void testEarlyEOF() {
    ScanLifecycleBuilder builder = new ScanLifecycleBuilder();
    builder.readerFactory(new SingleReaderFactory() {

        @Override
        public ManagedReader next(SchemaNegotiator negotiator) throws EarlyEofException {
            return new NoDataReader(negotiator);
        }
    });
    ScanLifecycle scan = buildScan(builder);
    RowBatchReader reader = scan.nextReader();
    assertFalse(reader.open());
    reader.close();
    assertFalse(scan.hasOutputSchema());
    scan.close();
}

Example 17 with ManagedReader

use of org.apache.drill.exec.physical.impl.scan.v3.ManagedReader in project drill by apache.

the class TestScanLifecycleBasics method testEarlySchemaWithProjectNone.

@Test
public void testEarlySchemaWithProjectNone() {
    ScanLifecycleBuilder builder = new ScanLifecycleBuilder();
    builder.projection(RowSetTestUtils.projectNone());
    builder.readerFactory(new SingleReaderFactory() {

        @Override
        public ManagedReader next(SchemaNegotiator negotiator) {
            return new MockEarlySchemaReader(negotiator, 1);
        }
    });
    ScanLifecycle scan = buildScan(builder);
    assertSame(ProjectionType.NONE, scan.schemaTracker().projectionType());
    RowBatchReader reader = scan.nextReader();
    assertTrue(reader.open());
    // Early schema: so output schema is available after open
    TupleMetadata expectedSchema = new SchemaBuilder().build();
    assertEquals(expectedSchema, scan.outputSchema());
    assertTrue(reader.next());
    RowSet expected = fixture.rowSetBuilder(expectedSchema).addRow().addRow().build();
    RowSetUtilities.verify(expected, fixture.wrap(reader.output()));
    assertFalse(reader.next());
    reader.close();
    scan.close();
}

Example 18 with ManagedReader

use of org.apache.drill.exec.physical.impl.scan.v3.ManagedReader in project drill by apache.

the class TestScanLifecycleBasics method testNullReaderWithSchema.

/**
 * Single reader early schema, EOF on first next().
 * Since this is an early-schema reader, there is an output
 * schema even without any rows.
 */
@Test
public void testNullReaderWithSchema() {
    ScanLifecycleBuilder builder = new ScanLifecycleBuilder();
    builder.readerFactory(new SingleReaderFactory() {

        @Override
        public ManagedReader next(SchemaNegotiator negotiator) {
            return new MockEarlySchemaReader(negotiator, 0);
        }
    });
    ScanLifecycle scan = buildScan(builder);
    assertSame(ProjectionType.ALL, scan.schemaTracker().projectionType());
    RowBatchReader reader = scan.nextReader();
    assertTrue(reader.open());
    // Early schema: so output schema is available after open
    assertTrue(scan.hasOutputSchema());
    assertEquals(SCHEMA, scan.outputSchema());
    assertTrue(reader.next());
    VectorContainer result = reader.output();
    assertEquals(0, result.getRecordCount());
    result.zeroVectors();
    // Early schema with no additional columns discovered
    assertEquals(SCHEMA, scan.outputSchema());
    // But, no second batch.
    assertFalse(reader.next());
    reader.close();
    scan.close();
}

Example 19 with ManagedReader

use of org.apache.drill.exec.physical.impl.scan.v3.ManagedReader in project drill by apache.

the class TestFileScanLifecycle method testWildcard.

@Test
public void testWildcard() {
    FileScanLifecycleBuilder builder = new FileScanLifecycleBuilder();
    builder.rootDir(MOCK_ROOT_PATH);
    builder.maxPartitionDepth(3);
    builder.fileSplits(Collections.singletonList(new DummyFileWork(MOCK_FILE_PATH)));
    builder.useLegacyWildcardExpansion(true);
    builder.readerFactory(new FileReaderFactory() {

        @Override
        public ManagedReader newReader(FileSchemaNegotiator negotiator) {
            return new MockEarlySchemaReader(negotiator, 1);
        }
    });
    ScanLifecycle scan = buildScan(builder);
    assertSame(ProjectionType.ALL, scan.schemaTracker().projectionType());
    RowBatchReader reader = scan.nextReader();
    assertTrue(reader.open());
    assertTrue(reader.next());
    TupleMetadata expectedSchema = new SchemaBuilder().addAll(SCHEMA).add(FileScanUtils.partitionColName(0), PARTITION_COL_TYPE).add(FileScanUtils.partitionColName(1), PARTITION_COL_TYPE).add(FileScanUtils.partitionColName(2), PARTITION_COL_TYPE).build();
    RowSet expected = fixture.rowSetBuilder(expectedSchema).addRow(10, "fred", MOCK_DIR0, MOCK_DIR1, null).addRow(20, "wilma", MOCK_DIR0, MOCK_DIR1, null).build();
    RowSetUtilities.verify(expected, fixture.wrap(reader.output()));
    assertFalse(reader.next());
    reader.close();
    scan.close();
}

Example 20 with ManagedReader

use of org.apache.drill.exec.physical.impl.scan.v3.ManagedReader in project drill by apache.

the class TestFileScanLifecycle method testPartitionColumnTwoDigits.

/**
 * Test the obscure case that the partition column contains two digits:
 * dir11. Also tests the obscure case that the output only has partition
 * columns.
 */
@Test
public void testPartitionColumnTwoDigits() {
    Path filePath = new Path("file:/w/0/1/2/3/4/5/6/7/8/9/10/d11/z.csv");
    FileScanLifecycleBuilder builder = new FileScanLifecycleBuilder();
    builder.rootDir(MOCK_ROOT_PATH);
    builder.maxPartitionDepth(11);
    builder.projection(RowSetTestUtils.projectList("a", "b", FileScanUtils.partitionColName(11)));
    builder.fileSplits(Collections.singletonList(new DummyFileWork(filePath)));
    builder.useLegacyWildcardExpansion(true);
    builder.readerFactory(new FileReaderFactory() {

        @Override
        public ManagedReader newReader(FileSchemaNegotiator negotiator) {
            return new MockEarlySchemaReader(negotiator, 1);
        }
    });
    ScanLifecycle scan = buildScan(builder);
    RowBatchReader reader = scan.nextReader();
    assertTrue(reader.open());
    assertTrue(reader.next());
    TupleMetadata expectedSchema = new SchemaBuilder().addAll(SCHEMA).add(FileScanUtils.partitionColName(11), PARTITION_COL_TYPE).build();
    RowSet expected = fixture.rowSetBuilder(expectedSchema).addRow(10, "fred", "d11").addRow(20, "wilma", "d11").build();
    RowSetUtilities.verify(expected, fixture.wrap(reader.output()));
    assertFalse(reader.next());
    reader.close();
    scan.close();
}