Java QueryResult.getNextPage方法代码示例

import com.google.cloud.bigquery.QueryResult; //导入方法依赖的package包/类
public static void runQuery(QueryJobConfiguration queryConfig)
    throws TimeoutException, InterruptedException {
  BigQuery bigquery = BigQueryOptions.getDefaultInstance().getService();

  // Create a job ID so that we can safely retry.
  JobId jobId = JobId.of(UUID.randomUUID().toString());
  Job queryJob = bigquery.create(JobInfo.newBuilder(queryConfig).setJobId(jobId).build());

  // Wait for the query to complete.
  queryJob = queryJob.waitFor();

  // Check for errors
  if (queryJob == null) {
    throw new RuntimeException("Job no longer exists");
  } else if (queryJob.getStatus().getError() != null) {
    // You can also look at queryJob.getStatus().getExecutionErrors() for all
    // errors, not just the latest one.
    throw new RuntimeException(queryJob.getStatus().getError().toString());
  }

  // Get the results.
  QueryResponse response = bigquery.getQueryResults(jobId);
  QueryResult result = response.getResult();

  // Print all pages of the results.
  while (result != null) {
    for (List<FieldValue> row : result.iterateAll()) {
      for (FieldValue val : row) {
        System.out.printf("%s,", val.toString());
      }
      System.out.printf("\n");
    }

    result = result.getNextPage();
  }
}
 

import com.google.cloud.bigquery.QueryResult; //导入方法依赖的package包/类
/**
 * Query the Shakespeare dataset for words with count at least {@code minWordCount} in the corpus
 * {@code corpus}.
 */
// [START bigquery_query_params]
private static void runNamed(final String corpus, final long minWordCount)
    throws InterruptedException {
  BigQuery bigquery =
      new BigQueryOptions.DefaultBigqueryFactory().create(BigQueryOptions.getDefaultInstance());

  String queryString =
      "SELECT word, word_count\n"
          + "FROM `bigquery-public-data.samples.shakespeare`\n"
          + "WHERE corpus = @corpus\n"
          + "AND word_count >= @min_word_count\n"
          + "ORDER BY word_count DESC";
  QueryJobConfiguration queryRequest =
      QueryJobConfiguration.newBuilder(queryString)
          .addNamedParameter("corpus", QueryParameterValue.string(corpus))
          .addNamedParameter("min_word_count", QueryParameterValue.int64(minWordCount))
          // Standard SQL syntax is required for parameterized queries.
          // See: https://cloud.google.com/bigquery/sql-reference/
          .setUseLegacySql(false)
          .build();

  // Execute the query.
  QueryResponse response = bigquery.query(queryRequest);

  // Wait for the job to finish (if the query takes more than 10 seconds to complete).
  while (!response.jobCompleted()) {
    Thread.sleep(1000);
    response = bigquery.getQueryResults(response.getJobId());
  }

  // Check for errors.
  if (response.hasErrors()) {
    String firstError = "";
    if (response.getExecutionErrors().size() != 0) {
      firstError = response.getExecutionErrors().get(0).getMessage();
    }
    throw new RuntimeException(firstError);
  }

  // Print all pages of the results.
  QueryResult result = response.getResult();
  while (result != null) {
    for (List<FieldValue> row : result.iterateAll()) {
      System.out.printf("%s: %d\n", row.get(0).getStringValue(), row.get(1).getLongValue());
    }

    result = result.getNextPage();
  }
}
 

import com.google.cloud.bigquery.QueryResult; //导入方法依赖的package包/类
/**
 * Query the baby names database to find the most popular names for a gender in a list of states.
 */
// [START bigquery_query_params_arrays]
private static void runArray(String gender, String[] states) throws InterruptedException {
  BigQuery bigquery =
      new BigQueryOptions.DefaultBigqueryFactory().create(BigQueryOptions.getDefaultInstance());

  String queryString =
      "SELECT name, sum(number) as count\n"
          + "FROM `bigquery-public-data.usa_names.usa_1910_2013`\n"
          + "WHERE gender = @gender\n"
          + "AND state IN UNNEST(@states)\n"
          + "GROUP BY name\n"
          + "ORDER BY count DESC\n"
          + "LIMIT 10;";
  QueryJobConfiguration queryRequest =
      QueryJobConfiguration.newBuilder(queryString)
          .addNamedParameter("gender", QueryParameterValue.string(gender))
          .addNamedParameter("states", QueryParameterValue.array(states, String.class))
          // Standard SQL syntax is required for parameterized queries.
          // See: https://cloud.google.com/bigquery/sql-reference/
          .setUseLegacySql(false)
          .build();

  // Execute the query.
  QueryResponse response = bigquery.query(queryRequest);

  // Wait for the job to finish (if the query takes more than 10 seconds to complete).
  while (!response.jobCompleted()) {
    Thread.sleep(1000);
    response = bigquery.getQueryResults(response.getJobId());
  }

  // Check for errors.
  if (response.hasErrors()) {
    String firstError = "";
    if (response.getExecutionErrors().size() != 0) {
      firstError = response.getExecutionErrors().get(0).getMessage();
    }
    throw new RuntimeException(firstError);
  }

  // Print all pages of the results.
  QueryResult result = response.getResult();
  while (result != null) {
    for (List<FieldValue> row : result.iterateAll()) {
      System.out.printf("%s: %d\n", row.get(0).getStringValue(), row.get(1).getLongValue());
    }

    result = result.getNextPage();
  }
}
 

import com.google.cloud.bigquery.QueryResult; //导入方法依赖的package包/类
private static void runTimestamp() throws InterruptedException {
  BigQuery bigquery =
      new BigQueryOptions.DefaultBigqueryFactory().create(BigQueryOptions.getDefaultInstance());

  DateTime timestamp = new DateTime(2016, 12, 7, 8, 0, 0, DateTimeZone.UTC);

  String queryString = "SELECT TIMESTAMP_ADD(@ts_value, INTERVAL 1 HOUR);";
  QueryJobConfiguration queryRequest =
      QueryJobConfiguration.newBuilder(queryString)
          .addNamedParameter(
              "ts_value",
              QueryParameterValue.timestamp(
                  // Timestamp takes microseconds since 1970-01-01T00:00:00 UTC
                  timestamp.getMillis() * 1000))
          // Standard SQL syntax is required for parameterized queries.
          // See: https://cloud.google.com/bigquery/sql-reference/
          .setUseLegacySql(false)
          .build();

  // Execute the query.
  QueryResponse response = bigquery.query(queryRequest);

  // Wait for the job to finish (if the query takes more than 10 seconds to complete).
  while (!response.jobCompleted()) {
    Thread.sleep(1000);
    response = bigquery.getQueryResults(response.getJobId());
  }

  // Check for errors.
  if (response.hasErrors()) {
    String firstError = "";
    if (response.getExecutionErrors().size() != 0) {
      firstError = response.getExecutionErrors().get(0).getMessage();
    }
    throw new RuntimeException(firstError);
  }

  // Print all pages of the results.
  QueryResult result = response.getResult();
  DateTimeFormatter formatter = ISODateTimeFormat.dateTimeNoMillis().withZoneUTC();
  while (result != null) {
    for (List<FieldValue> row : result.iterateAll()) {
      System.out.printf(
          "%s\n",
          formatter.print(
              new DateTime(
                  // Timestamp values are returned in microseconds since 1970-01-01T00:00:00 UTC,
                  // but org.joda.time.DateTime constructor accepts times in milliseconds.
                  row.get(0).getTimestampValue() / 1000, DateTimeZone.UTC)));
    }

    result = result.getNextPage();
  }
}