Function writeAndReadUsingDml

spanner/dml.js:186–231

(instanceId, databaseId, projectId)

}

async function writeAndReadUsingDml(instanceId, databaseId, projectId) {
  // [START spanner_dml_write_then_read]
  // 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);

  try {
    await database.runTransactionAsync(async transaction => {
      await transaction.runUpdate({
        sql: `INSERT Singers (SingerId, FirstName, LastName)
          VALUES (11, 'Timothy', 'Campbell')`,
      });

      const [rows] = await transaction.run({
        sql: 'SELECT FirstName, LastName FROM Singers',
      });
      rows.forEach(row => {
        const json = row.toJSON();
        console.log(`${json.FirstName} ${json.LastName}`);
      });

      await transaction.commit();
    });
  } catch (err) {
    console.error('ERROR:', err);
  } finally {
    // Close the database when finished.
    await database.close();
  }
  // [END spanner_dml_write_then_read]
}

async function updateUsingDmlWithStruct(instanceId, databaseId, projectId) {
  // [START spanner_dml_structs]