Function queryDataWithNewColumn

spanner/schema.js:123–175

(instanceId, databaseId, projectId)

}

async function queryDataWithNewColumn(instanceId, databaseId, projectId) {
  // [START spanner_query_data_with_new_column]
  // This sample uses the `MarketingBudget` column. You can add the column
  // 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(row => {
      const json = row.toJSON();

      console.log(
        `SingerId: ${json.SingerId}, AlbumId: ${
          json.AlbumId
        }, MarketingBudget: ${
          json.MarketingBudget ? json.MarketingBudget : null
        }`
      );
    });
  } catch (err) {
    console.error('Failed to query data with new column:', err.message || err);
  } finally {
    // Close the database when finished.
    await database.close();
  }
  // [END spanner_query_data_with_new_column]
}

const {
  createDatabaseWithVersionRetentionPeriod,