RunLegacyQuery.java

/*
 * Copyright 2020 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
 *
 * http://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.
 */

package com.example.bigquery;

// [START bigquery_query_legacy]
import com.google.cloud.bigquery.BigQuery;
import com.google.cloud.bigquery.BigQueryException;
import com.google.cloud.bigquery.BigQueryOptions;
import com.google.cloud.bigquery.QueryJobConfiguration;
import com.google.cloud.bigquery.TableResult;

public class RunLegacyQuery {

  public static void main(String[] args) {
    runLegacyQuery();
  }

  public static void runLegacyQuery() {
    try {
      // Initialize client that will be used to send requests. This client only needs to be created
      // once, and can be reused for multiple requests.
      BigQuery bigquery = BigQueryOptions.getDefaultInstance().getService();

      // To use legacy SQL syntax, set useLegacySql to true.
      String query =
          "SELECT corpus FROM [bigquery-public-data:samples.shakespeare] GROUP BY corpus;";
      QueryJobConfiguration queryConfig =
          QueryJobConfiguration.newBuilder(query).setUseLegacySql(true).build();

      // Execute the query.
      TableResult result = bigquery.query(queryConfig);

      // Print the results.
      result.iterateAll().forEach(rows -> rows.forEach(row -> System.out.println(row.getValue())));

      System.out.println("Legacy query ran successfully");
    } catch (BigQueryException | InterruptedException e) {
      System.out.println("Legacy query did not run \n" + e.toString());
    }
  }
}
// [END bigquery_query_legacy]