How to use the @google-cloud/spanner.Spanner function in @google-cloud/spanner

//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

'use strict';

const config = require('../config');
const {Spanner} = require('@google-cloud/spanner');

const GCLOUD_PROJECT = config.get('GCLOUD_PROJECT');

const spanner = new Spanner({GCLOUD_PROJECT});
const instance = spanner.instance('quiz-instance');
const database = instance.database('quiz-database');
const table = database.table('feedback');


function saveFeedback(
    { email, quiz, timestamp, rating, feedback, score }) {
    const rev_email = email
        .replace(/[@\.]/g, '_')
        .split('_')
        .reverse()
        .join('_');
    const record = {
        feedbackId: `${rev_email}_${quiz}_${timestamp}`,
        email,
        quiz,

// This speeds up queries, but takes more space compared to normal indexes
  // See the link below for more information:
  // https://cloud.google.com/spanner/docs/secondary-indexes#storing_clause

  // Imports the Google Cloud client library
  const {Spanner} = require('@google-cloud/spanner');

  /**
   * TODO(developer): Uncomment the following lines before running the sample.
   */
  // const projectId = 'my-project-id';
  // const instanceId = 'my-instance';
  // const databaseId = 'my-database';

  // Creates a client
  const spanner = new Spanner({
    projectId: projectId,
  });

  // Gets a reference to a Cloud Spanner instance and database
  const instance = spanner.instance(instanceId);
  const database = instance.database(databaseId);

  const request = [
    'CREATE INDEX AlbumsByAlbumTitle2 ON Albums(AlbumTitle) STORING (MarketingBudget)',
  ];

  // Creates a new index in the database
  try {
    const [operation] = await database.updateSchema(request);

    console.log('Waiting for operation to complete...');

function writeUsingDml(instanceId, databaseId, projectId) {
  // [START spanner_dml_getting_started_insert]
  // Imports the Google Cloud client library
  const {Spanner} = require('@google-cloud/spanner');

  /**
   * TODO(developer): Uncomment the following lines before running the sample.
   */
  // const projectId = 'my-project-id';
  // const instanceId = 'my-instance';
  // const databaseId = 'my-database';

  // Creates a client
  const spanner = new Spanner({
    projectId: projectId,
  });

  // Gets a reference to a Cloud Spanner instance and database
  const instance = spanner.instance(instanceId);
  const database = instance.database(databaseId);

  database.runTransaction(async (err, transaction) => {
    if (err) {
      console.error(err);
      return;
    }
    try {
      const [rowCount] = await transaction.runUpdate({
        sql: `INSERT Singers (SingerId, FirstName, LastName) VALUES
        (12, 'Melissa', 'Garcia'),

function readOnlyTransaction(instanceId, databaseId, projectId) {
  // [START spanner_read_only_transaction]
  // Imports the Google Cloud client library
  const {Spanner} = require('@google-cloud/spanner');

  /**
   * TODO(developer): Uncomment the following lines before running the sample.
   */
  // const projectId = 'my-project-id';
  // const instanceId = 'my-instance';
  // const databaseId = 'my-database';

  // Creates a client
  const spanner = new Spanner({
    projectId: projectId,
  });

  // Gets a reference to a Cloud Spanner instance and database
  const instance = spanner.instance(instanceId);
  const database = instance.database(databaseId);

  // Gets a transaction object that captures the database state
  // at a specific point in time
  database.getSnapshot(async (err, transaction) => {
    if (err) {
      console.error(err);
      return;
    }
    const queryOne = 'SELECT SingerId, AlbumId, AlbumTitle FROM Albums';

//    ALTER TABLE Albums ADD COLUMN
  //    LastUpdateTime TIMESTAMP OPTIONS (allow_commit_timestamp=true)
  // [END_EXCLUDE]

  // Imports the Google Cloud client library
  const {Spanner} = require('@google-cloud/spanner');

  /**
   * TODO(developer): Uncomment the following lines before running the sample.
   */
  // const projectId = 'my-project-id';
  // const instanceId = 'my-instance';
  // const databaseId = 'my-database';

  // Creates a client
  const spanner = new Spanner({
    projectId: projectId,
  });

  // Gets a reference to a Cloud Spanner instance and database
  const instance = spanner.instance(instanceId);
  const database = instance.database(databaseId);

  // Update a row in the Albums table
  // Note: Cloud Spanner interprets Node.js numbers as FLOAT64s, so they
  // must be converted to strings before being inserted as INT64s
  const albumsTable = database.table('Albums');

  const data = [
    {
      SingerId: '1',
      AlbumId: '1',

) {
  // [START spanner_query_data_with_index]
  // Imports the Google Cloud client library
  const {Spanner} = require('@google-cloud/spanner');

  /**
   * TODO(developer): Uncomment the following lines before running the sample.
   */
  // const projectId = 'my-project-id';
  // const instanceId = 'my-instance';
  // const databaseId = 'my-database';
  // const startTitle = 'Ardvark';
  // const endTitle = 'Goo';

  // Creates a client
  const spanner = new Spanner({
    projectId: projectId,
  });

  // Gets a reference to a Cloud Spanner instance and database
  const instance = spanner.instance(instanceId);
  const database = instance.database(databaseId);

  const query = {
    sql: `SELECT AlbumId, AlbumTitle, MarketingBudget
          FROM Albums@{FORCE_INDEX=AlbumsByAlbumTitle}
          WHERE AlbumTitle >= @startTitle AND AlbumTitle <= @endTitle`,
    params: {
      startTitle: startTitle,
      endTitle: endTitle,
    },
  };

// by running the `add_column` sample or by running this DDL statement against
  // your database:
  //    ALTER TABLE Albums ADD COLUMN MarketingBudget INT64

  // Imports the Google Cloud client library
  const {Spanner} = require('@google-cloud/spanner');

  /**
   * TODO(developer): Uncomment the following lines before running the sample.
   */
  // const projectId = 'my-project-id';
  // const instanceId = 'my-instance';
  // const databaseId = 'my-database';

  // Creates a client
  const spanner = new Spanner({
    projectId: projectId,
  });

  // Gets a reference to a Cloud Spanner instance and database
  const instance = spanner.instance(instanceId);
  const database = instance.database(databaseId);

  const query = {
    sql: `SELECT SingerId, AlbumId, MarketingBudget FROM Albums`,
  };

  // Queries rows from the Albums table
  try {
    const [rows] = await database.run(query);

    rows.forEach(async row => {

async function insertData(instanceId, databaseId, projectId) {
  // [START spanner_insert_data]
  // Imports the Google Cloud client library
  const {Spanner} = require('@google-cloud/spanner');

  /**
   * TODO(developer): Uncomment the following lines before running the sample.
   */
  // const projectId = 'my-project-id';
  // const instanceId = 'my-instance';
  // const databaseId = 'my-database';

  // Creates a client
  const spanner = new Spanner({
    projectId: projectId,
  });

  // Gets a reference to a Cloud Spanner instance and database
  const instance = spanner.instance(instanceId);
  const database = instance.database(databaseId);

  // Instantiate Spanner table objects
  const singersTable = database.table('Singers');
  const albumsTable = database.table('Albums');

  // Inserts rows into the Singers table
  // Note: Cloud Spanner interprets Node.js numbers as FLOAT64s, so
  // they must be converted to strings before being inserted as INT64s
  try {
    await singersTable.insert([

async function createVenuesTable(instanceId, databaseId, projectId) {
  // [START spanner_create_table_with_datatypes]
  // Imports the Google Cloud client library
  const {Spanner} = require('@google-cloud/spanner');

  /**
   * TODO(developer): Uncomment the following lines before running the sample.
   */
  // const projectId = 'my-project-id';
  // const instanceId = 'my-instance';
  // const databaseId = 'my-database';

  // Creates a client
  const spanner = new Spanner({
    projectId: projectId,
  });

  // Gets a reference to a Cloud Spanner instance.
  const instance = spanner.instance(instanceId);
  const database = instance.database(databaseId);

  const request = [
    `CREATE TABLE Venues (
        VenueId		         INT64 NOT NULL,
        VenueName              STRING(100),
        VenueInfo              BYTES(MAX),
        Capacity               INT64,
        AvailableDates         ARRAY,
        LastContactDate        Date,
        OutdoorVenue           BOOL,

async function queryWithDate(instanceId, databaseId, projectId) {
  // [START spanner_query_with_date_parameter]
  // Imports the Google Cloud client library.
  const {Spanner} = require('@google-cloud/spanner');

  /**
   * TODO(developer): Uncomment the following lines before running the sample.
   */
  // const projectId = 'my-project-id';
  // const instanceId = 'my-instance';
  // const databaseId = 'my-database';

  // Creates a client.
  const spanner = new Spanner({
    projectId: projectId,
  });

  // Gets a reference to a Cloud Spanner instance and database.
  const instance = spanner.instance(instanceId);
  const database = instance.database(databaseId);

  const fieldType = {
    type: 'date',
  };

  const exampleDate = '2019-01-01';

  const query = {
    sql: `SELECT VenueId, VenueName, LastContactDate FROM Venues
            WHERE LastContactDate < @lastContactDate`,