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

Example 21 with ScanLifecycleBuilder

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

the class TestScanLifecycleTwoReaders method testColumnReorderingBA.

/**
 * {@code SELECT * FROM} (b,a) then (a, b). The order of the first
 * table drives the order of the results.
 */
@Test
public void testColumnReorderingBA() {
    ScanLifecycleBuilder builder = new ScanLifecycleBuilder();
    builder.readerFactory(new TwoReaderFactory() {

        @Override
        public ManagedReader firstReader(SchemaNegotiator negotiator) {
            return new MockReorderedReader(negotiator);
        }

        @Override
        public ManagedReader secondReader(SchemaNegotiator negotiator) {
            return new MockLateSchemaReader(negotiator, 1);
        }
    });
    ScanLifecycle scan = buildScan(builder);
    RowBatchReader reader = scan.nextReader();
    reader = scan.nextReader();
    assertTrue(reader.open());
    assertTrue(reader.next());
    RowSet expected = fixture.rowSetBuilder(MockReorderedReader.READER_SCHEMA).addRow("barney", 30).addRow("betty", 40).build();
    RowSetUtilities.verify(expected, fixture.wrap(reader.output()));
    assertFalse(reader.next());
    reader.close();
    reader = scan.nextReader();
    reader = scan.nextReader();
    assertTrue(reader.open());
    assertTrue(reader.next());
    expected = fixture.rowSetBuilder(MockReorderedReader.READER_SCHEMA).addRow("fred", 10).addRow("wilma", 20).build();
    RowSetUtilities.verify(expected, fixture.wrap(reader.output()));
    assertFalse(reader.next());
    reader.close();
    scan.close();
}

Example 22 with ScanLifecycleBuilder

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

the class TestScanLifecycleBasics method testEarlySchemaWithProject.

/**
 * Test SELECT a, c FROM table(a, b)
 */
@Test
public void testEarlySchemaWithProject() {
    ScanLifecycleBuilder builder = new ScanLifecycleBuilder();
    builder.projection(RowSetTestUtils.projectList("a", "c"));
    builder.readerFactory(new SingleReaderFactory() {

        @Override
        public ManagedReader next(SchemaNegotiator negotiator) {
            return new MockEarlySchemaReader(negotiator, 1);
        }
    });
    ScanLifecycle scan = buildScan(builder);
    assertSame(ProjectionType.SOME, scan.schemaTracker().projectionType());
    RowBatchReader reader = scan.nextReader();
    assertTrue(reader.open());
    // Early schema: so output schema is available after open
    TupleMetadata expectedSchema = new SchemaBuilder().add("a", MinorType.INT).addNullable("c", MinorType.INT).build();
    assertEquals(expectedSchema, scan.outputSchema());
    assertTrue(reader.next());
    RowSet expected = fixture.rowSetBuilder(expectedSchema).addRow(10, null).addRow(20, null).build();
    RowSetUtilities.verify(expected, fixture.wrap(reader.output()));
    assertFalse(reader.next());
    reader.close();
    scan.close();
}

Example 23 with ScanLifecycleBuilder

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

the class TestScanLifecycleBasics method testLateSchemaWithProject.

/**
 * Test SELECT a, c FROM table(a, b)
 * c will be null
 */
@Test
public void testLateSchemaWithProject() {
    ScanLifecycleBuilder builder = new ScanLifecycleBuilder();
    builder.projection(RowSetTestUtils.projectList("a", "c"));
    builder.readerFactory(new SingleReaderFactory() {

        @Override
        public ManagedReader next(SchemaNegotiator negotiator) {
            return new MockLateSchemaReader(negotiator, 1);
        }
    });
    ScanLifecycle scan = buildScan(builder);
    assertSame(ProjectionType.SOME, scan.schemaTracker().projectionType());
    RowBatchReader reader = scan.nextReader();
    assertTrue(reader.open());
    assertTrue(reader.next());
    // Late schema: so output schema is available after next()
    TupleMetadata expectedSchema = new SchemaBuilder().add("a", MinorType.INT).addNullable("c", MinorType.INT).build();
    assertEquals(expectedSchema, scan.outputSchema());
    RowSet expected = fixture.rowSetBuilder(expectedSchema).addRow(10, null).addRow(20, null).build();
    RowSetUtilities.verify(expected, fixture.wrap(reader.output()));
    assertFalse(reader.next());
    reader.close();
    scan.close();
}

Example 24 with ScanLifecycleBuilder

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

the class TestScanLifecycleBasics method testEarlySchemaOneBatch.

/**
 * Test SELECT * from an early-schema table of (a, b)
 */
@Test
public void testEarlySchemaOneBatch() {
    ScanLifecycleBuilder builder = new ScanLifecycleBuilder();
    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());
    RowBatchReader reader = scan.nextReader();
    assertTrue(reader.open());
    // Early schema: so output schema is available after open
    assertEquals(SCHEMA, scan.outputSchema());
    assertTrue(reader.next());
    RowSetUtilities.verify(simpleExpected(0), fixture.wrap(reader.output()));
    assertFalse(reader.next());
    reader.close();
    scan.close();
}

Example 25 with ScanLifecycleBuilder

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

the class TestScanLifecycleBasics method testLateSchemaOneBatch.

/**
 * Single reader late schema, one batch.
 */
@Test
public void testLateSchemaOneBatch() {
    ScanLifecycleBuilder builder = new ScanLifecycleBuilder();
    builder.readerFactory(new SingleReaderFactory() {

        @Override
        public ManagedReader next(SchemaNegotiator negotiator) {
            return new MockLateSchemaReader(negotiator, 1);
        }
    });
    ScanLifecycle scan = buildScan(builder);
    assertSame(ProjectionType.ALL, scan.schemaTracker().projectionType());
    RowBatchReader reader = scan.nextReader();
    assertTrue(reader.open());
    // Late schema: so no output schema is available after open
    assertFalse(scan.hasOutputSchema());
    assertTrue(reader.next());
    // Late schema, output schema available after first batch
    assertTrue(scan.hasOutputSchema());
    assertEquals(SCHEMA, scan.outputSchema());
    RowSetUtilities.verify(simpleExpected(0), fixture.wrap(reader.output()));
    assertFalse(reader.next());
    reader.close();
    scan.close();
}