Examples with SingleRowSet org.apache.drill.exec.physical.rowSet.RowSet.SingleRowSet used on opensource projects

Example 6 with SingleRowSet

use of org.apache.drill.exec.physical.rowSet.RowSet.SingleRowSet in project drill by apache.

the class TestScanOrchestratorEarlySchema method testEarlySchemaSelectAll.

/**
 * Test SELECT a, b FROM table(a, b)
 */
@Test
public void testEarlySchemaSelectAll() {
    ScanOrchestratorBuilder builder = new MockScanBuilder();
    // SELECT a, b ...
    builder.projection(RowSetTestUtils.projectList("a", "b"));
    ScanSchemaOrchestrator scanner = new ScanSchemaOrchestrator(fixture.allocator(), builder);
    // ... FROM table
    ReaderSchemaOrchestrator reader = scanner.startReader();
    // file schema (a, b)
    TupleMetadata tableSchema = new SchemaBuilder().add("a", MinorType.INT).add("b", MinorType.VARCHAR).buildSchema();
    // Create the table loader
    ResultSetLoader loader = reader.makeTableLoader(tableSchema);
    // Don't bother with an empty batch here or in other tests.
    // Simulates the second reader in a scan.
    // Create a batch of data.
    reader.startBatch();
    loader.writer().addRow(1, "fred").addRow(2, "wilma");
    reader.endBatch();
    // Verify
    SingleRowSet expected = fixture.rowSetBuilder(tableSchema).addRow(1, "fred").addRow(2, "wilma").build();
    RowSetUtilities.verify(expected, fixture.wrap(scanner.output()));
    scanner.close();
}

Example 7 with SingleRowSet

use of org.apache.drill.exec.physical.rowSet.RowSet.SingleRowSet in project drill by apache.

the class TestScanOrchestratorEarlySchema method testEarlySchemaSelectNone.

/**
 * Test SELECT - FROM table(a, b)
 */
@Test
public void testEarlySchemaSelectNone() {
    ScanOrchestratorBuilder builder = new MockScanBuilder();
    // SELECT ...
    // (Like SELECT COUNT(*) ...
    builder.projection(RowSetTestUtils.projectList());
    ScanSchemaOrchestrator scanner = new ScanSchemaOrchestrator(fixture.allocator(), builder);
    // ... FROM table
    ReaderSchemaOrchestrator reader = scanner.startReader();
    // file schema (a, b)
    TupleMetadata tableSchema = new SchemaBuilder().add("a", MinorType.INT).add("b", MinorType.VARCHAR).buildSchema();
    // Create the table loader
    ResultSetLoader loader = reader.makeTableLoader(tableSchema);
    // Verify that unprojected column is unprojected in the
    // table loader.
    assertTrue(loader.isProjectionEmpty());
    assertFalse(loader.writer().column("a").isProjected());
    assertFalse(loader.writer().column("b").isProjected());
    // Verify empty batch.
    BatchSchema expectedSchema = new BatchSchemaBuilder().withSchemaBuilder(new SchemaBuilder()).build();
    // Create a batch of data.
    reader.startBatch();
    loader.writer().addRow(1, "fred").addRow(2, "wilma");
    reader.endBatch();
    // Verify
    {
        // Two rows, no data.
        SingleRowSet expected = fixture.rowSetBuilder(expectedSchema).addRow().addRow().build();
        RowSetUtilities.verify(expected, fixture.wrap(scanner.output()));
    }
    // Fast path to fill in empty rows
    reader.startBatch();
    loader.skipRows(10);
    reader.endBatch();
    // Verify
    {
        VectorContainer output = scanner.output();
        assertEquals(10, output.getRecordCount());
        output.zeroVectors();
    }
    scanner.close();
}

Example 8 with SingleRowSet

use of org.apache.drill.exec.physical.rowSet.RowSet.SingleRowSet in project drill by apache.

the class TestScanOrchestratorEarlySchema method testEarlySchemaSelectExtra.

/**
 * Test SELECT a, b, c FROM table(a, b)
 * c will be null
 */
@Test
public void testEarlySchemaSelectExtra() {
    ScanOrchestratorBuilder builder = new MockScanBuilder();
    // SELECT a, b, c ...
    builder.projection(RowSetTestUtils.projectList("a", "b", "c"));
    ScanSchemaOrchestrator scanner = new ScanSchemaOrchestrator(fixture.allocator(), builder);
    // ... FROM table
    ReaderSchemaOrchestrator reader = scanner.startReader();
    // file schema (a, b)
    TupleMetadata tableSchema = new SchemaBuilder().add("a", MinorType.INT).add("b", MinorType.VARCHAR).buildSchema();
    // Create the table loader
    ResultSetLoader loader = reader.makeTableLoader(tableSchema);
    TupleMetadata expectedSchema = new SchemaBuilder().add("a", MinorType.INT).add("b", MinorType.VARCHAR).addNullable("c", MinorType.INT).buildSchema();
    // Create a batch of data.
    reader.startBatch();
    loader.writer().addRow(1, "fred").addRow(2, "wilma");
    reader.endBatch();
    // Verify
    SingleRowSet expected = fixture.rowSetBuilder(expectedSchema).addRow(1, "fred", null).addRow(2, "wilma", null).build();
    RowSetUtilities.verify(expected, fixture.wrap(scanner.output()));
    scanner.close();
}

Example 9 with SingleRowSet

use of org.apache.drill.exec.physical.rowSet.RowSet.SingleRowSet in project drill by apache.

the class TestScanOrchestratorEarlySchema method testEmptySchema.

/**
 * Test SELECT * from an early-schema table of () (that is,
 * a schema that consists of zero columns.
 */
@Test
public void testEmptySchema() {
    ScanOrchestratorBuilder builder = new MockScanBuilder();
    // SELECT * ...
    builder.projection(RowSetTestUtils.projectAll());
    ScanSchemaOrchestrator scanner = new ScanSchemaOrchestrator(fixture.allocator(), builder);
    // ... FROM table
    ReaderSchemaOrchestrator reader = scanner.startReader();
    // file schema ()
    TupleMetadata tableSchema = new SchemaBuilder().buildSchema();
    // Create the table loader
    reader.makeTableLoader(tableSchema);
    // Create a batch of data. Because there are no columns, it does
    // not make sense to ready any rows.
    reader.startBatch();
    reader.endBatch();
    // Verify
    {
        SingleRowSet expected = fixture.rowSetBuilder(tableSchema).build();
        RowSetUtilities.verify(expected, fixture.wrap(scanner.output()));
    }
    scanner.close();
}

Example 10 with SingleRowSet

use of org.apache.drill.exec.physical.rowSet.RowSet.SingleRowSet in project drill by apache.

the class TestScanOrchestratorEarlySchema method testColumnReordering.

/**
 * Verify that different table column orders are projected into the
 * SELECT order, preserving vectors, so no schema change for column
 * reordering.
 */
@Test
public void testColumnReordering() {
    ScanOrchestratorBuilder builder = new MockScanBuilder();
    builder.enableSchemaSmoothing(true);
    builder.projection(RowSetTestUtils.projectList("a", "b", "c"));
    ScanSchemaOrchestrator scanner = new ScanSchemaOrchestrator(fixture.allocator(), builder);
    TupleMetadata schema1 = new SchemaBuilder().add("a", MinorType.INT).addNullable("b", MinorType.VARCHAR, 10).add("c", MinorType.BIGINT).buildSchema();
    TupleMetadata schema2 = new SchemaBuilder().add("c", MinorType.BIGINT).add("a", MinorType.INT).addNullable("b", MinorType.VARCHAR, 10).buildSchema();
    TupleMetadata schema3 = new SchemaBuilder().add("a", MinorType.INT).add("c", MinorType.BIGINT).addNullable("b", MinorType.VARCHAR, 10).buildSchema();
    SchemaTracker tracker = new SchemaTracker();
    int schemaVersion;
    {
        // ... FROM table 1
        ReaderSchemaOrchestrator reader = scanner.startReader();
        // Projection of (a, b, c) to (a, b, c)
        ResultSetLoader loader = reader.makeTableLoader(schema1);
        reader.startBatch();
        loader.writer().addRow(10, "fred", 110L).addRow(20, "wilma", 110L);
        reader.endBatch();
        tracker.trackSchema(scanner.output());
        schemaVersion = tracker.schemaVersion();
        SingleRowSet expected = fixture.rowSetBuilder(schema1).addRow(10, "fred", 110L).addRow(20, "wilma", 110L).build();
        RowSetUtilities.verify(expected, fixture.wrap(scanner.output()));
        scanner.closeReader();
    }
    {
        // ... FROM table 2
        ReaderSchemaOrchestrator reader = scanner.startReader();
        // Projection of (c, a, b) to (a, b, c)
        ResultSetLoader loader = reader.makeTableLoader(schema2);
        reader.startBatch();
        loader.writer().addRow(330L, 30, "bambam").addRow(440L, 40, "betty");
        reader.endBatch();
        tracker.trackSchema(scanner.output());
        assertEquals(schemaVersion, tracker.schemaVersion());
        SingleRowSet expected = fixture.rowSetBuilder(schema1).addRow(30, "bambam", 330L).addRow(40, "betty", 440L).build();
        RowSetUtilities.verify(expected, fixture.wrap(scanner.output()));
    }
    {
        // ... FROM table 3
        ReaderSchemaOrchestrator reader = scanner.startReader();
        // Projection of (a, c, b) to (a, b, c)
        ResultSetLoader loader = reader.makeTableLoader(schema3);
        reader.startBatch();
        loader.writer().addRow(50, 550L, "dino").addRow(60, 660L, "barney");
        reader.endBatch();
        tracker.trackSchema(scanner.output());
        assertEquals(schemaVersion, tracker.schemaVersion());
        SingleRowSet expected = fixture.rowSetBuilder(schema1).addRow(50, "dino", 550L).addRow(60, "barney", 660L).build();
        RowSetUtilities.verify(expected, fixture.wrap(scanner.output()));
    }
    scanner.close();
}