Function addNumericColumn

spanner/numeric-add-column.js:17–60

(instanceId, databaseId, projectId)

'use strict';

async function addNumericColumn(instanceId, databaseId, projectId) {
  // [START spanner_add_numeric_column]

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

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

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

  const databaseAdminClient = spanner.getDatabaseAdminClient();

  const request = ['ALTER TABLE Venues ADD COLUMN Revenue NUMERIC'];
  try {
    // Alter existing table to add a column.
    const [operation] = await databaseAdminClient.updateDatabaseDdl({
      database: databaseAdminClient.databasePath(
        projectId,
        instanceId,
        databaseId
      ),
      statements: request,
    });

    console.log(`Waiting for operation on ${databaseId} to complete...`);

    await operation.promise();

    console.log(
      `Added Revenue column to Venues table in database ${databaseId}.`
    );
  } catch (err) {
    console.error('ERROR:', err);
  }
  // [END spanner_add_numeric_column]
}

module.exports.addNumericColumn = addNumericColumn;