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

Example 16 with ScanOperatorExec

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

the class TestScanLimit method testLimit1.

/**
 * LIMIT 1, simplest case
 */
@Test
public void testLimit1() {
    TestFixture fixture = new TestFixture(1);
    ScanOperatorExec scan = fixture.scan;
    // Reader builds schema, and stops after one row, though the reader
    // itself is happy to provide more.
    assertTrue(scan.buildSchema());
    assertTrue(scan.next());
    BatchAccessor batch = scan.batchAccessor();
    assertEquals(1, batch.rowCount());
    batch.release();
    // No second batch or second reader
    assertFalse(scan.next());
    fixture.close();
    // Only the first of the two readers were created.
    assertEquals(1, fixture.createCount());
}

Example 17 with ScanOperatorExec

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

the class TestScanLimit method testLimitOnSecondBatch.

/**
 * LIMIT 75, halfway through second batch.
 */
@Test
public void testLimitOnSecondBatch() {
    TestFixture fixture = new TestFixture(75);
    ScanOperatorExec scan = fixture.scan;
    assertTrue(scan.buildSchema());
    assertTrue(scan.next());
    BatchAccessor batch = scan.batchAccessor();
    assertEquals(50, batch.rowCount());
    batch.release();
    assertTrue(scan.next());
    batch = scan.batchAccessor();
    assertEquals(25, batch.rowCount());
    batch.release();
    // No second reader
    assertFalse(scan.next());
    fixture.close();
    // Only the first of the two readers were created.
    assertEquals(1, fixture.createCount());
}

Example 18 with ScanOperatorExec

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

the class TestMockRowReader method testOverflow.

/**
 * Test a mock varchar column large enough to cause vector overflow.
 */
@Test
public void testOverflow() {
    int rowCount = ValueVector.MAX_ROW_COUNT;
    MockTableDef.MockColumn[] cols = new MockTableDef.MockColumn[] { new MockTableDef.MockColumn("a", MinorType.INT, DataMode.REQUIRED, null, null, null, null, null, null), new MockTableDef.MockColumn("b", MinorType.VARCHAR, DataMode.REQUIRED, 1000, null, null, null, null, null) };
    MockTableDef.MockScanEntry entry = new MockTableDef.MockScanEntry(rowCount, true, null, null, cols);
    MockSubScanPOP config = new MockSubScanPOP("dummy", true, Collections.singletonList(entry));
    ManagedReader<SchemaNegotiator> reader = new ExtendedMockBatchReader(entry);
    @SuppressWarnings("unchecked") List<ManagedReader<SchemaNegotiator>> readers = Collections.singletonList(reader);
    // Create options and the scan operator
    ScanFixture mockBatch = buildScan(config, readers);
    ScanOperatorExec scan = mockBatch.scanOp;
    // First batch: build schema. The reader helps: it returns an
    // empty first batch.
    assertTrue(scan.buildSchema());
    assertEquals(0, scan.batchAccessor().rowCount());
    // Next call, return with data, limited by batch size.
    int totalRowCount = 0;
    int batchCount = 0;
    while (scan.next()) {
        assertTrue(scan.batchAccessor().rowCount() < ValueVector.MAX_ROW_COUNT);
        BatchAccessor batchAccessor = scan.batchAccessor();
        totalRowCount += batchAccessor.rowCount();
        batchCount++;
        batchAccessor.release();
    }
    assertEquals(ValueVector.MAX_ROW_COUNT, totalRowCount);
    assertTrue(batchCount > 1);
    mockBatch.close();
}

Example 19 with ScanOperatorExec

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

the class TestMockRowReader method testOptional.

/**
 * Verify that the mock reader can generate nullable (optional) columns,
 * including filling values with nulls at some percentage, 25% by
 * default.
 */
@Test
public void testOptional() {
    int rowCount = 10;
    Map<String, Object> props = new HashMap<>();
    props.put("nulls", 50);
    MockTableDef.MockColumn[] cols = new MockTableDef.MockColumn[] { new MockTableDef.MockColumn("a", MinorType.INT, DataMode.OPTIONAL, null, null, null, null, null, null), new MockTableDef.MockColumn("b", MinorType.VARCHAR, DataMode.OPTIONAL, 10, null, null, null, null, props) };
    MockTableDef.MockScanEntry entry = new MockTableDef.MockScanEntry(rowCount, true, null, null, cols);
    MockSubScanPOP config = new MockSubScanPOP("dummy", true, Collections.singletonList(entry));
    ManagedReader<SchemaNegotiator> reader = new ExtendedMockBatchReader(entry);
    List<ManagedReader<SchemaNegotiator>> readers = Collections.singletonList(reader);
    // Create options and the scan operator
    ScanFixture mockBatch = buildScan(config, readers);
    ScanOperatorExec scan = mockBatch.scanOp;
    // First batch: build schema. The reader helps: it returns an
    // empty first batch.
    assertTrue(scan.buildSchema());
    TupleMetadata expectedSchema = new SchemaBuilder().addNullable("a", MinorType.INT).addNullable("b", MinorType.VARCHAR, 10).build();
    BatchSchema expectedBatchSchema = new BatchSchema(SelectionVectorMode.NONE, expectedSchema.toFieldList());
    assertTrue(expectedBatchSchema.isEquivalent(scan.batchAccessor().schema()));
    assertEquals(0, scan.batchAccessor().rowCount());
    // Next call, return with data.
    assertTrue(scan.next());
    assertTrue(expectedBatchSchema.isEquivalent(scan.batchAccessor().schema()));
    assertEquals(rowCount, scan.batchAccessor().rowCount());
    scan.batchAccessor().release();
    // EOF
    assertFalse(scan.next());
    mockBatch.close();
}

Example 20 with ScanOperatorExec

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

the class TestMockRowReader method testBasics.

/**
 * Test the most basic case: required integers and strings.
 */
@Test
public void testBasics() {
    int rowCount = 10;
    MockTableDef.MockColumn[] cols = new MockTableDef.MockColumn[] { new MockTableDef.MockColumn("a", MinorType.INT, DataMode.REQUIRED, null, null, null, null, null, null), new MockTableDef.MockColumn("b", MinorType.VARCHAR, DataMode.REQUIRED, 10, null, null, null, null, null) };
    MockTableDef.MockScanEntry entry = new MockTableDef.MockScanEntry(rowCount, true, null, null, cols);
    MockSubScanPOP config = new MockSubScanPOP("dummy", true, Collections.singletonList(entry));
    ManagedReader<SchemaNegotiator> reader = new ExtendedMockBatchReader(entry);
    List<ManagedReader<SchemaNegotiator>> readers = Collections.singletonList(reader);
    // Create options and the scan operator
    ScanFixture mockBatch = buildScan(config, readers);
    ScanOperatorExec scan = mockBatch.scanOp;
    // First batch: build schema. The reader helps: it returns an
    // empty first batch.
    assertTrue(scan.buildSchema());
    TupleMetadata expectedSchema = new SchemaBuilder().add("a", MinorType.INT).add("b", MinorType.VARCHAR, // Width is reflected in meta-data
    10).buildSchema();
    BatchSchema expectedBatchSchema = new BatchSchema(SelectionVectorMode.NONE, expectedSchema.toFieldList());
    assertTrue(expectedBatchSchema.isEquivalent(scan.batchAccessor().schema()));
    assertEquals(0, scan.batchAccessor().rowCount());
    scan.batchAccessor().release();
    // Next call, return with data.
    assertTrue(scan.next());
    assertTrue(expectedBatchSchema.isEquivalent(scan.batchAccessor().schema()));
    assertEquals(rowCount, scan.batchAccessor().rowCount());
    scan.batchAccessor().release();
    // EOF
    assertFalse(scan.next());
    mockBatch.close();
}