Copy a dataset

Create a transfer configuration to copy all tables in a dataset across projects, locations, or both.

Explore further

For detailed documentation that includes this code sample, see the following:

• Manage datasets

Code sample

Java

Before trying this sample, follow the Java setup instructions in the BigQuery quickstart using client libraries. For more information, see the BigQuery Java API reference documentation.

To authenticate to BigQuery, set up Application Default Credentials. For more information, see Set up authentication for client libraries.

import com.google.api.gax.rpc.ApiException;
import com.google.cloud.bigquery.datatransfer.v1.CreateTransferConfigRequest;
import com.google.cloud.bigquery.datatransfer.v1.DataTransferServiceClient;
import com.google.cloud.bigquery.datatransfer.v1.ProjectName;
import com.google.cloud.bigquery.datatransfer.v1.TransferConfig;
import com.google.protobuf.Struct;
import com.google.protobuf.Value;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

// Sample to copy dataset from another gcp project
public class CopyDataset {

  public static void main(String[] args) throws IOException {
    // TODO(developer): Replace these variables before running the sample.
    final String destinationProjectId = "MY_DESTINATION_PROJECT_ID";
    final String destinationDatasetId = "MY_DESTINATION_DATASET_ID";
    final String sourceProjectId = "MY_SOURCE_PROJECT_ID";
    final String sourceDatasetId = "MY_SOURCE_DATASET_ID";
    Map<String, Value> params = new HashMap<>();
    params.put("source_project_id", Value.newBuilder().setStringValue(sourceProjectId).build());
    params.put("source_dataset_id", Value.newBuilder().setStringValue(sourceDatasetId).build());
    TransferConfig transferConfig =
        TransferConfig.newBuilder()
            .setDestinationDatasetId(destinationDatasetId)
            .setDisplayName("Your Dataset Copy Name")
            .setDataSourceId("cross_region_copy")
            .setParams(Struct.newBuilder().putAllFields(params).build())
            .setSchedule("every 24 hours")
            .build();
    copyDataset(destinationProjectId, transferConfig);
  }

  public static void copyDataset(String projectId, TransferConfig transferConfig)
      throws IOException {
    try (DataTransferServiceClient dataTransferServiceClient = DataTransferServiceClient.create()) {
      ProjectName parent = ProjectName.of(projectId);
      CreateTransferConfigRequest request =
          CreateTransferConfigRequest.newBuilder()
              .setParent(parent.toString())
              .setTransferConfig(transferConfig)
              .build();
      TransferConfig config = dataTransferServiceClient.createTransferConfig(request);
      System.out.println("Copy dataset created successfully :" + config.getName());
    } catch (ApiException ex) {
      System.out.print("Copy dataset was not created." + ex.toString());
    }
  }
}

Python

Before trying this sample, follow the Python setup instructions in the BigQuery quickstart using client libraries. For more information, see the BigQuery Python API reference documentation.

To authenticate to BigQuery, set up Application Default Credentials. For more information, see Set up authentication for client libraries.

from google.cloud import bigquery_datatransfer

transfer_client = bigquery_datatransfer.DataTransferServiceClient()

destination_project_id = "my-destination-project"
destination_dataset_id = "my_destination_dataset"
source_project_id = "my-source-project"
source_dataset_id = "my_source_dataset"
transfer_config = bigquery_datatransfer.TransferConfig(
    destination_dataset_id=destination_dataset_id,
    display_name="Your Dataset Copy Name",
    data_source_id="cross_region_copy",
    params={
        "source_project_id": source_project_id,
        "source_dataset_id": source_dataset_id,
    },
    schedule="every 24 hours",
)
transfer_config = transfer_client.create_transfer_config(
    parent=transfer_client.common_project_path(destination_project_id),
    transfer_config=transfer_config,
)
print(f"Created transfer config: {transfer_config.name}")

What's next

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