text: /**
   * Copyright 2019 Google LLC
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *   https://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  'use strict';
  
  function main(datasetId = 'my_dataset', tableId = 'my_table') {
    // [START bigquery_label_table]
    // Import the Google Cloud client library
    const {BigQuery} = require('@google-cloud/bigquery');
    const bigquery = new BigQuery();
  
    async function labelTable() {
      // Adds a label to an existing table.
  
      /**
       * TODO(developer): Uncomment the following lines before running the sample.
       */
      // const datasetId = 'my_dataset';
      // const tableId = 'my_table';
  
      const dataset = bigquery.dataset(datasetId);
      const [table] = await dataset.table(tableId).get();
  
      // Retrieve current table metadata
      const [metadata] = await table.getMetadata();
  
      // Add label to table metadata
      metadata.labels = {color: 'green'};
      const [apiResponse] = await table.setMetadata(metadata);
  
      console.log(`${tableId} labels:`);
      console.log(apiResponse.labels);
    }
    // [END bigquery_label_table]
    labelTable();
  }
  main(...process.argv.slice(2));
  