Function databaseWithQueryOptions

spanner/queryoptions.js:17–73

(instanceId, databaseId, projectId)

'use strict';

async function databaseWithQueryOptions(instanceId, databaseId, projectId) {
  // [START spanner_create_client_with_query_options]
  // 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,
  });
  let database;
  try {
    // Gets a reference to a Cloud Spanner instance and database
    const instance = spanner.instance(instanceId);
    database = instance.database(
      databaseId,
      {},
      {
        optimizerVersion: '1',
        // The list of available statistics packages can be found by querying the
        // "INFORMATION_SCHEMA.SPANNER_STATISTICS" table.
        optimizerStatisticsPackage: 'latest',
      }
    );

    const query = {
      sql: `SELECT AlbumId, AlbumTitle, MarketingBudget
          FROM Albums
          ORDER BY AlbumTitle`,
    };

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

    rows.forEach(row => {
      const json = row.toJSON();
      const marketingBudget = json.MarketingBudget
        ? json.MarketingBudget
        : null; // This value is nullable
      console.log(
        `AlbumId: ${json.AlbumId}, AlbumTitle: ${json.AlbumTitle}, MarketingBudget: ${marketingBudget}`
      );
    });
  } catch (err) {
    console.error('ERROR:', err);
  } finally {
    // Close the database when finished.
    await database.close();
  }
  // [END spanner_create_client_with_query_options]
}