Update default table expiration times

Updates a dataset's default table expiration times.

Explore further

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

• Update dataset properties

Code sample

Go

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

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

import (
	"context"
	"fmt"
	"time"

	"cloud.google.com/go/bigquery"
)

// updateDatasetDefaultExpiration demonstrats setting the default expiration of a dataset
// to a specific retention period.
func updateDatasetDefaultExpiration(projectID, datasetID string) error {
	// projectID := "my-project-id"
	// datasetID := "mydataset"
	ctx := context.Background()
	client, err := bigquery.NewClient(ctx, projectID)
	if err != nil {
		return fmt.Errorf("bigquery.NewClient: %w", err)
	}
	defer client.Close()

	ds := client.Dataset(datasetID)
	meta, err := ds.Metadata(ctx)
	if err != nil {
		return err
	}
	update := bigquery.DatasetMetadataToUpdate{
		DefaultTableExpiration: 24 * time.Hour,
	}
	if _, err := client.Dataset(datasetID).Update(ctx, update, meta.ETag); err != nil {
		return err
	}
	return nil
}

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.cloud.bigquery.BigQuery;
import com.google.cloud.bigquery.BigQueryException;
import com.google.cloud.bigquery.BigQueryOptions;
import com.google.cloud.bigquery.Dataset;
import java.util.concurrent.TimeUnit;

public class UpdateDatasetExpiration {

  public static void main(String[] args) {
    // TODO(developer): Replace these variables before running the sample.
    String datasetName = "MY_DATASET_NAME";
    // Update dataset expiration to one day
    Long newExpiration = TimeUnit.MILLISECONDS.convert(1, TimeUnit.DAYS);
    updateDatasetExpiration(datasetName, newExpiration);
  }

  public static void updateDatasetExpiration(String datasetName, Long newExpiration) {
    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();

      Dataset dataset = bigquery.getDataset(datasetName);
      bigquery.update(dataset.toBuilder().setDefaultTableLifetime(newExpiration).build());
      System.out.println("Dataset description updated successfully to " + newExpiration);
    } catch (BigQueryException e) {
      System.out.println("Dataset expiration was not updated \n" + e.toString());
    }
  }
}

Node.js

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

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

// Import the Google Cloud client library
const {BigQuery} = require('@google-cloud/bigquery');
const bigquery = new BigQuery();

async function updateDatasetExpiration() {
  // Updates the lifetime of all tables in the dataset, in milliseconds.

  /**
   * TODO(developer): Uncomment the following lines before running the sample.
   */
  // const datasetId = "my_dataset";

  // Retreive current dataset metadata
  const dataset = bigquery.dataset(datasetId);
  const [metadata] = await dataset.getMetadata();

  // Set new dataset metadata
  const expirationTime = 24 * 60 * 60 * 1000;
  metadata.defaultTableExpirationMs = expirationTime.toString();

  const [apiResponse] = await dataset.setMetadata(metadata);
  const newExpirationTime = apiResponse.defaultTableExpirationMs;

  console.log(`${datasetId} expiration: ${newExpirationTime}`);
}

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

# Construct a BigQuery client object.
client = bigquery.Client()

# TODO(developer): Set dataset_id to the ID of the dataset to fetch.
# dataset_id = 'your-project.your_dataset'

dataset = client.get_dataset(dataset_id)  # Make an API request.
dataset.default_table_expiration_ms = 24 * 60 * 60 * 1000  # In milliseconds.

dataset = client.update_dataset(
    dataset, ["default_table_expiration_ms"]
)  # Make an API request.

full_dataset_id = "{}.{}".format(dataset.project, dataset.dataset_id)
print(
    "Updated dataset {} with new expiration {}".format(
        full_dataset_id, dataset.default_table_expiration_ms
    )
)

What's next

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