Crea una tabla externa

Crea una tabla externa de AWS.

Muestra de código

Java

Antes de probar este ejemplo, sigue las instrucciones de configuración para Java que se encuentran en la guía de inicio rápido de BigQuery sobre cómo usar bibliotecas cliente. Para obtener más información, consulta la documentación de referencia de la API de BigQuery para Java. 

import com.google.cloud.bigquery.BigQuery;
import com.google.cloud.bigquery.BigQueryException;
import com.google.cloud.bigquery.BigQueryOptions;
import com.google.cloud.bigquery.CsvOptions;
import com.google.cloud.bigquery.ExternalTableDefinition;
import com.google.cloud.bigquery.Field;
import com.google.cloud.bigquery.Schema;
import com.google.cloud.bigquery.StandardSQLTypeName;
import com.google.cloud.bigquery.TableId;
import com.google.cloud.bigquery.TableInfo;

// Sample to create an external aws table
public class CreateExternalTableAws {

  public static void main(String[] args) {
    // TODO(developer): Replace these variables before running the sample.
    String projectId = "MY_PROJECT_ID";
    String datasetName = "MY_DATASET_NAME";
    String tableName = "MY_TABLE_NAME";
    String connectionId = "MY_CONNECTION_ID";
    String sourceUri = "s3://your-bucket-name/";
    CsvOptions options = CsvOptions.newBuilder().setSkipLeadingRows(1).build();
    Schema schema =
        Schema.of(
            Field.of("name", StandardSQLTypeName.STRING),
            Field.of("post_abbr", StandardSQLTypeName.STRING));
    ExternalTableDefinition externalTableDefinition =
        ExternalTableDefinition.newBuilder(sourceUri, options)
            .setConnectionId(connectionId)
            .setSchema(schema)
            .build();
    createExternalTableAws(projectId, datasetName, tableName, externalTableDefinition);
  }

  public static void createExternalTableAws(
      String projectId,
      String datasetName,
      String tableName,
      ExternalTableDefinition externalTableDefinition) {
    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();

      TableId tableId = TableId.of(projectId, datasetName, tableName);
      TableInfo tableInfo = TableInfo.newBuilder(tableId, externalTableDefinition).build();

      bigquery.create(tableInfo);
      System.out.println("Aws external table created successfully");

      // Clean up
      bigquery.delete(TableId.of(projectId, datasetName, tableName));
    } catch (BigQueryException e) {
      System.out.println("Aws external was not created." + e.toString());
    }
  }
}