设置 Hive 分区选项

设置 Hive 分区选项

深入探索

如需查看包含此代码示例的详细文档，请参阅以下内容：

• 创建 Cloud Storage 外部表

代码示例

Java

试用此示例之前，请按照 BigQuery 快速入门：使用客户端库中的 Java 设置说明进行操作。如需了解详情，请参阅 BigQuery Java API 参考文档。

如需向 BigQuery 进行身份验证，请设置应用默认凭据。 如需了解详情，请参阅为客户端库设置身份验证。

import com.google.cloud.bigquery.BigQuery;
import com.google.cloud.bigquery.BigQueryException;
import com.google.cloud.bigquery.BigQueryOptions;
import com.google.cloud.bigquery.ExternalTableDefinition;
import com.google.cloud.bigquery.FormatOptions;
import com.google.cloud.bigquery.HivePartitioningOptions;
import com.google.cloud.bigquery.TableId;
import com.google.cloud.bigquery.TableInfo;

// Sample to create external table using hive partitioning
public class CreateTableExternalHivePartitioned {

  public static void main(String[] args) {
    // TODO(developer): Replace these variables before running the sample.
    String datasetName = "MY_DATASET_NAME";
    String tableName = "MY_TABLE_NAME";
    String sourceUri = "gs://cloud-samples-data/bigquery/hive-partitioning-samples/customlayout/*";
    String sourceUriPrefix =
        "gs://cloud-samples-data/bigquery/hive-partitioning-samples/customlayout/{pkey:STRING}/";
    createTableExternalHivePartitioned(datasetName, tableName, sourceUriPrefix, sourceUri);
  }

  public static void createTableExternalHivePartitioned(
      String datasetName, String tableName, String sourceUriPrefix, String sourceUri) {
    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();

      // Configuring partitioning options
      HivePartitioningOptions hivePartitioningOptions =
          HivePartitioningOptions.newBuilder()
              .setMode("CUSTOM")
              .setRequirePartitionFilter(true)
              .setSourceUriPrefix(sourceUriPrefix)
              .build();

      TableId tableId = TableId.of(datasetName, tableName);
      ExternalTableDefinition customTable =
          ExternalTableDefinition.newBuilder(sourceUri, FormatOptions.parquet())
              .setAutodetect(true)
              .setHivePartitioningOptions(hivePartitioningOptions)
              .build();
      bigquery.create(TableInfo.of(tableId, customTable));
      System.out.println("External table created using hivepartitioningoptions");
    } catch (BigQueryException e) {
      System.out.println("External table was not created" + e.toString());
    }
  }
}

后续步骤

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