Examples with DictWriter org.apache.drill.exec.vector.accessor.DictWriter used on opensource projects

Example 16 with DictWriter

use of org.apache.drill.exec.vector.accessor.DictWriter in project drill by apache.

the class TestRowSet method testRepeatedDictStructure.

@Test
public void testRepeatedDictStructure() {
    final String dictName = "d";
    final TupleMetadata schema = new SchemaBuilder().add("id", MinorType.INT).addDictArray(dictName, MinorType.FLOAT8).value(MinorType.VARCHAR).resumeSchema().buildSchema();
    final ExtendableRowSet rowSet = fixture.rowSet(schema);
    final RowSetWriter writer = rowSet.writer();
    // Repeated dict
    assertEquals(ObjectType.ARRAY, writer.column(dictName).type());
    final ScalarWriter idWriter = writer.scalar(0);
    final ArrayWriter dictArrayWriter = writer.column(1).array();
    assertEquals(ObjectType.ARRAY, dictArrayWriter.entryType());
    DictWriter dictWriter = dictArrayWriter.dict();
    assertEquals(ValueType.DOUBLE, dictWriter.keyType());
    assertEquals(ObjectType.SCALAR, dictWriter.valueType());
    final ScalarWriter keyWriter = dictWriter.keyWriter();
    final ScalarWriter valueWriter = dictWriter.valueWriter().scalar();
    assertEquals(ValueType.DOUBLE, keyWriter.valueType());
    assertEquals(ValueType.STRING, valueWriter.valueType());
    // Write data
    idWriter.setInt(1);
    keyWriter.setDouble(1);
    valueWriter.setString("a");
    // advance to next entry position
    dictWriter.save();
    keyWriter.setDouble(2);
    valueWriter.setString("b");
    dictWriter.save();
    // advance to next array position
    dictArrayWriter.save();
    keyWriter.setDouble(3);
    valueWriter.setString("c");
    dictWriter.save();
    dictArrayWriter.save();
    // advance to next row
    writer.save();
    idWriter.setInt(2);
    keyWriter.setDouble(11);
    valueWriter.setString("d");
    dictWriter.save();
    keyWriter.setDouble(12);
    valueWriter.setString("e");
    dictWriter.save();
    dictArrayWriter.save();
    writer.save();
    idWriter.setInt(3);
    keyWriter.setDouble(21);
    valueWriter.setString("f");
    dictWriter.save();
    keyWriter.setDouble(22);
    valueWriter.setString("g");
    dictWriter.save();
    keyWriter.setDouble(23);
    valueWriter.setString("h");
    dictWriter.save();
    dictArrayWriter.save();
    keyWriter.setDouble(24);
    valueWriter.setString("i");
    dictWriter.save();
    keyWriter.setDouble(25);
    valueWriter.setString("j");
    dictWriter.save();
    keyWriter.setDouble(26.5);
    valueWriter.setString("k");
    dictWriter.save();
    keyWriter.setDouble(27);
    valueWriter.setString("l");
    dictWriter.save();
    keyWriter.setDouble(28);
    valueWriter.setString("m");
    dictWriter.save();
    dictArrayWriter.save();
    writer.save();
    // Finish the row set and get a reader.
    final SingleRowSet actual = writer.done();
    final RowSetReader reader = actual.reader();
    // Verify reader structure
    assertEquals(ObjectType.ARRAY, reader.column(dictName).type());
    final ArrayReader dictArrayReader = reader.array(1);
    assertEquals(ObjectType.ARRAY, dictArrayReader.entryType());
    final DictReader dictReader = dictArrayReader.entry().dict();
    assertEquals(ValueType.DOUBLE, dictReader.keyColumnType());
    assertEquals(ObjectType.SCALAR, dictReader.valueColumnType());
    final KeyAccessor keyAccessor = dictReader.keyAccessor();
    final ScalarReader valueReader = dictReader.valueReader().scalar();
    // Row 1
    assertTrue(reader.next());
    // array is not null
    assertFalse(dictArrayReader.isNull());
    assertTrue(dictArrayReader.next());
    // first dict is not null
    assertFalse(dictArrayReader.isNull());
    assertTrue(keyAccessor.find(2.0f));
    assertEquals("b", valueReader.getObject());
    assertTrue(keyAccessor.find(1.0f));
    assertEquals("a", valueReader.getObject());
    // no entry for given key
    assertFalse(keyAccessor.find(1.1f));
    assertTrue(dictArrayReader.next());
    assertTrue(keyAccessor.find(3.0f));
    assertEquals("c", valueReader.getObject());
    assertFalse(keyAccessor.find(1.0f));
    assertEquals(Arrays.asList(map(1.0, "a", 2.0, "b"), map(3.0, "c")), dictArrayReader.getObject());
    // Row 2
    assertTrue(reader.next());
    assertTrue(dictArrayReader.next());
    assertTrue(keyAccessor.find(11.0f));
    assertEquals("d", valueReader.getString());
    assertFalse(keyAccessor.find(1.0f));
    assertTrue(keyAccessor.find(12.0f));
    assertEquals("e", valueReader.getString());
    // Row 3: use explicit positioning
    assertTrue(reader.next());
    dictArrayReader.setPosn(1);
    assertTrue(keyAccessor.find(24.0f));
    assertEquals("i", valueReader.getString());
    assertTrue(keyAccessor.find(26.5f));
    assertEquals("k", valueReader.getString());
    assertTrue(keyAccessor.find(28.0f));
    assertEquals("m", valueReader.getString());
    assertFalse(keyAccessor.find(35.0f));
    assertTrue(keyAccessor.find(27.0f));
    assertEquals("l", valueReader.getString());
    Map<Object, Object> element1 = map(24.0, "i", 25.0, "j", 26.5, "k", 27.0, "l", 28.0, "m");
    assertEquals(element1, dictReader.getObject());
    dictArrayReader.setPosn(0);
    assertTrue(keyAccessor.find(23.0f));
    assertEquals("h", valueReader.getObject());
    assertTrue(keyAccessor.find(21.0f));
    assertEquals("f", valueReader.getObject());
    assertFalse(keyAccessor.find(23.05f));
    Map<Object, Object> element0 = map(21.0, "f", 22.0, "g", 23.0, "h");
    assertEquals(element0, dictReader.getObject());
    assertEquals(Arrays.asList(element0, element1), dictArrayReader.getObject());
    assertFalse(reader.next());
    // Verify that the dict accessor's value count was set.
    final RepeatedDictVector vector = (RepeatedDictVector) actual.container().getValueVector(1).getValueVector();
    assertEquals(3, vector.getAccessor().getValueCount());
    final SingleRowSet expected = fixture.rowSetBuilder(schema).addRow(1, objArray(map(1.0f, "a", 2.0f, "b"), map(3.0f, "c"))).addRow(2, objArray(singleObjArray(map(11.0f, "d", 12.0f, "e")))).addRow(3, objArray(map(21.0f, "f", 22.0f, "g", 23.0f, "h"), map(24.0f, "i", 25.0f, "j", 26.5f, "k", 27.0f, "l", 28.0f, "m"))).build();
    RowSetUtilities.verify(expected, actual);
}