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

Example 51 with RowBatchReader

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

the class TestScanLifecycleSchema method testStrictProvidedSchemaSubset.

/**
 * 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();
}