刪除標籤

import (
	"context"
	"fmt"

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

// deleteDatasetLabel demonstrates removing a specific label from a dataset's metadata.
func deleteDatasetLabel(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: %v", err)
	}
	defer client.Close()

	ds := client.Dataset(datasetID)
	meta, err := ds.Metadata(ctx)
	if err != nil {
		return err
	}
	update := bigquery.DatasetMetadataToUpdate{}
	update.DeleteLabel("color")
	if _, err := ds.Update(ctx, update, meta.ETag); err != nil {
		return err
	}
	return nil
}

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.HashMap;
import java.util.Map;

// Sample tp deletes a label on a dataset.
public class DeleteLabelDataset {

  public static void runDeleteLabelDataset() {
    // TODO(developer): Replace these variables before running the sample.
    String datasetName = "MY_DATASET_NAME";
    deleteLabelDataset(datasetName);
  }

  public static void deleteLabelDataset(String datasetName) {
    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();

      // This example dataset starts with existing label { color: 'green' }
      Dataset dataset = bigquery.getDataset(datasetName);
      // Add label to dataset
      Map<String, String> labels = new HashMap<>();
      labels.put("color", null);

      dataset.toBuilder().setLabels(labels).build().update();
      System.out.println("Dataset label deleted successfully");
    } catch (BigQueryException e) {
      System.out.println("Dataset label was not deleted. \n" + e.toString());
    }
  }
}

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

async function deleteLabelDataset() {
  // Deletes a label on a dataset.
  // This example dataset starts with existing label { color: 'green' }

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

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

  // Add label to dataset metadata
  metadata.labels = {color: null};
  const [apiResponse] = await dataset.setMetadata(metadata);

  console.log(`${datasetId} labels:`);
  console.log(apiResponse.labels);
}

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.

# To delete a label from a dataset, set its value to None.
dataset.labels["color"] = None

dataset = client.update_dataset(dataset, ["labels"])  # Make an API request.
print("Labels deleted from {}".format(dataset_id))

import (
	"context"
	"fmt"

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

// deleteTableLabel demonstrates how to remove a specific metadata Label from a BigQuery table.
func deleteTableLabel(projectID, datasetID, tableID string) error {
	// projectID := "my-project-id"
	// datasetID := "mydataset"
	// tableID := "mytable"
	ctx := context.Background()
	client, err := bigquery.NewClient(ctx, projectID)
	if err != nil {
		return fmt.Errorf("bigquery.NewClient: %v", err)
	}
	defer client.Close()

	tbl := client.Dataset(datasetID).Table(tableID)
	meta, err := tbl.Metadata(ctx)
	if err != nil {
		return err
	}
	update := bigquery.TableMetadataToUpdate{}
	update.DeleteLabel("color")
	if _, err := tbl.Update(ctx, update, meta.ETag); err != nil {
		return err
	}
	return nil
}

import com.google.cloud.bigquery.BigQuery;
import com.google.cloud.bigquery.BigQueryException;
import com.google.cloud.bigquery.BigQueryOptions;
import com.google.cloud.bigquery.Table;
import com.google.cloud.bigquery.TableId;
import java.util.HashMap;
import java.util.Map;

// Sample tp deletes a label on a table.
public class DeleteLabelTable {

  public static void runDeleteLabelTable() {
    // TODO(developer): Replace these variables before running the sample.
    String datasetName = "MY_DATASET_NAME";
    String tableName = "MY_TABLE_NAME";
    deleteLabelTable(datasetName, tableName);
  }

  public static void deleteLabelTable(String datasetName, String tableName) {
    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();

      // This example table starts with existing label { color: 'green' }
      Table table = bigquery.getTable(TableId.of(datasetName, tableName));
      // Add label to table
      Map<String, String> labels = new HashMap<>();
      labels.put("color", null);

      table.toBuilder().setLabels(labels).build().update();
      System.out.println("Table label deleted successfully");
    } catch (BigQueryException e) {
      System.out.println("Table label was not deleted. \n" + e.toString());
    }
  }
}

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

async function deleteLabelTable() {
  // Deletes a label from an existing table.
  // This example dataset starts with existing label { color: 'green' }

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

  const dataset = bigquery.dataset(datasetId);
  const [table] = await dataset.table(tableId).get();

  // Retrieve current table metadata
  const [metadata] = await table.getMetadata();

  // Add label to table metadata
  metadata.labels = {color: null};
  const [apiResponse] = await table.setMetadata(metadata);

  console.log(`${tableId} labels:`);
  console.log(apiResponse.labels);
}

from google.cloud import bigquery

client = bigquery.Client()

# TODO(dev): Change table_id to the full name of the table you wish to delete from.
table_id = "your-project.your_dataset.your_table_name"
# TODO(dev): Change label_key to the name of the label you want to remove.
label_key = "color"
table = client.get_table(table_id)  # API request

# To delete a label from a table, set its value to None
table.labels[label_key] = None

table = client.update_table(table, ["labels"])  # API request

print(f"Deleted label '{label_key}' from {table_id}.")