Function queryWithTimestamp

spanner/timestamp.js:299–360

(instanceId, databaseId, projectId)

}

async function queryWithTimestamp(instanceId, databaseId, projectId) {
  // [START spanner_query_data_with_timestamp_column]
  // [START_EXCLUDE]
  // This sample uses the `MarketingBudget` column. You can add the column
  // by running the `schema.js addColumn` sample or by running this DDL statement against
  // your database:
  //    ALTER TABLE Albums ADD COLUMN MarketingBudget INT64
  //
  // In addition this query expects the `LastUpdateTime` column
  // added by running the `timestamp.js addTimestampColumn` sample
  // or applying the DDL statement:
  //    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,
  });
  let database;
  try {
    // Gets a reference to a Cloud Spanner instance and database
    const instance = spanner.instance(instanceId);
    database = instance.database(databaseId);

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

    // Queries rows from the Albums table
    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
        }, LastUpdateTime: ${json.LastUpdateTime}`
      );
    });
  } catch (err) {
    console.error('ERROR:', err);
  } finally {
    // Close the database when finished