Update a description

Update the description of an existing dataset resource.

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

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"

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

// updateDatasetDescription demonstrates how the Description metadata of a dataset can
// be read and modified.
func updateDatasetDescription(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{
		Description: "Updated Description.",
	}
	if _, err = ds.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;

public class UpdateDatasetDescription {

  public static void main(String[] args) {
    // TODO(developer): Replace these variables before running the sample.
    String datasetName = "MY_DATASET_NAME";
    String newDescription = "this is the new dataset description";
    updateDatasetDescription(datasetName, newDescription);
  }

  public static void updateDatasetDescription(String datasetName, String newDescription) {
    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().setDescription(newDescription).build());
      System.out.println("Dataset description updated successfully to " + newDescription);
    } catch (BigQueryException e) {
      System.out.println("Dataset description 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 updateDatasetDescription() {
  // Updates a dataset's description.

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

  // Set new dataset description
  const description = 'New dataset description.';
  metadata.description = description;

  const [apiResponse] = await dataset.setMetadata(metadata);
  const newDescription = apiResponse.description;

  console.log(`${datasetId} description: ${newDescription}`);
}

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

full_dataset_id = "{}.{}".format(dataset.project, dataset.dataset_id)
print(
    "Updated dataset '{}' with description '{}'.".format(
        full_dataset_id, dataset.description
    )
)

What's next

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