Aktualisieren Sie ein Label
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Vorhandenes Label für ein Dataset aktualisieren
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Codebeispiel
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[[["Leicht verständlich","easyToUnderstand","thumb-up"],["Mein Problem wurde gelöst","solvedMyProblem","thumb-up"],["Sonstiges","otherUp","thumb-up"]],[["Schwer verständlich","hardToUnderstand","thumb-down"],["Informationen oder Beispielcode falsch","incorrectInformationOrSampleCode","thumb-down"],["Benötigte Informationen/Beispiele nicht gefunden","missingTheInformationSamplesINeed","thumb-down"],["Problem mit der Übersetzung","translationIssue","thumb-down"],["Sonstiges","otherDown","thumb-down"]],[],[[["\u003cp\u003eThis content provides code samples and instructions for updating an existing label on a BigQuery dataset.\u003c/p\u003e\n"],["\u003cp\u003eCode examples are provided in Go, Java, Node.js, and Python, illustrating how to add a "color: green" label to a dataset.\u003c/p\u003e\n"],["\u003cp\u003eThe documentation references links for setting up authentication and client libraries to use BigQuery.\u003c/p\u003e\n"],["\u003cp\u003eEach code sample guides the user to the quickstart and API reference documentation for their specific language.\u003c/p\u003e\n"],["\u003cp\u003eThe code samples use language-specific client libraries to interact with the BigQuery API for dataset label manipulation.\u003c/p\u003e\n"]]],[],null,["# Update a label\n\nUpdate an existing label on a dataset.\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Adding labels to resources](/bigquery/docs/adding-labels)\n- [Updating labels](/bigquery/docs/updating-labels)\n\nCode sample\n-----------\n\n### Go\n\n\nBefore trying this sample, follow the Go setup instructions in the\n[BigQuery quickstart using\nclient libraries](/bigquery/docs/quickstarts/quickstart-client-libraries).\n\n\nFor more information, see the\n[BigQuery Go API\nreference documentation](https://godoc.org/cloud.google.com/go/bigquery).\n\n\nTo authenticate to BigQuery, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for client libraries](/bigquery/docs/authentication#client-libs).\n\n import (\n \t\"context\"\n \t\"fmt\"\n\n \t\"cloud.google.com/go/bigquery\"\n )\n\n // addDatasetLabel demonstrates adding label metadata to an existing dataset.\n func addDatasetLabel(projectID, datasetID string) error {\n \t// projectID := \"my-project-id\"\n \t// datasetID := \"mydataset\"\n \tctx := context.Background()\n \tclient, err := bigquery.NewClient(ctx, projectID)\n \tif err != nil {\n \t\treturn fmt.Errorf(\"bigquery.NewClient: %w\", err)\n \t}\n \tdefer client.Close()\n\n \tds := client.Dataset(datasetID)\n \tmeta, err := ds.Metadata(ctx)\n \tif err != nil {\n \t\treturn err\n \t}\n\n \tupdate := bigquery.https://cloud.google.com/go/docs/reference/cloud.google.com/go/bigquery/latest/index.html#cloud_google_com_go_bigquery_DatasetMetadataToUpdate{}\n \tupdate.SetLabel(\"color\", \"green\")\n \tif _, err := ds.Update(ctx, update, meta.ETag); err != nil {\n \t\treturn err\n \t}\n \treturn nil\n }\n\n### Java\n\n\nBefore trying this sample, follow the Java setup instructions in the\n[BigQuery quickstart using\nclient libraries](/bigquery/docs/quickstarts/quickstart-client-libraries).\n\n\nFor more information, see the\n[BigQuery Java API\nreference documentation](/java/docs/reference/google-cloud-bigquery/latest/overview).\n\n\nTo authenticate to BigQuery, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for client libraries](/bigquery/docs/authentication#client-libs).\n\n import com.google.cloud.bigquery.https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQuery.html;\n import com.google.cloud.bigquery.https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQueryException.html;\n import com.google.cloud.bigquery.https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQueryOptions.html;\n import com.google.cloud.bigquery.https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.Dataset.html;\n import java.util.HashMap;\n import java.util.Map;\n\n // Sample to updates a label on dataset\n public class LabelDataset {\n\n public static void main(String[] args) {\n // TODO(developer): Replace these variables before running the sample.\n String datasetName = \"MY_DATASET_NAME\";\n labelDataset(datasetName);\n }\n\n public static void labelDataset(String datasetName) {\n try {\n // Initialize client that will be used to send requests. This client only needs to be created\n // once, and can be reused for multiple requests.\n https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQuery.html bigquery = https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQueryOptions.html.getDefaultInstance().getService();\n\n // This example dataset starts with existing label { color: 'green' }\n https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.Dataset.html dataset = bigquery.https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQuery.html#com_google_cloud_bigquery_BigQuery_getDataset_com_google_cloud_bigquery_DatasetId_com_google_cloud_bigquery_BigQuery_DatasetOption____(datasetName);\n // Add label to dataset\n Map\u003cString, String\u003e labels = new HashMap\u003c\u003e();\n labels.put(\"color\", \"green\");\n\n dataset.https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.Dataset.html#com_google_cloud_bigquery_Dataset_toBuilder__().setLabels(labels).build().update();\n System.out.println(\"Label added successfully\");\n } catch (https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQueryException.html e) {\n System.out.println(\"Label was not added. \\n\" + e.toString());\n }\n }\n }\n\n### Node.js\n\n\nBefore trying this sample, follow the Node.js setup instructions in the\n[BigQuery quickstart using\nclient libraries](/bigquery/docs/quickstarts/quickstart-client-libraries).\n\n\nFor more information, see the\n[BigQuery Node.js API\nreference documentation](https://googleapis.dev/nodejs/bigquery/latest/index.html).\n\n\nTo authenticate to BigQuery, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for client libraries](/bigquery/docs/authentication#client-libs).\n\n // Import the Google Cloud client library\n const {BigQuery} = require('https://cloud.google.com/nodejs/docs/reference/bigquery/latest/overview.html');\n const bigquery = new https://cloud.google.com/nodejs/docs/reference/bigquery/latest/bigquery/bigquery.html();\n\n async function labelDataset() {\n // Updates a label on a dataset.\n\n /**\n * TODO(developer): Uncomment the following lines before running the sample\n */\n // const datasetId = \"my_dataset\";\n\n // Retrieve current dataset metadata.\n const dataset = bigquery.dataset(datasetId);\n const [metadata] = await dataset.getMetadata();\n\n // Add label to dataset metadata\n metadata.labels = {color: 'green'};\n const [apiResponse] = await dataset.setMetadata(metadata);\n\n console.log(`${datasetId} labels:`);\n console.log(apiResponse.labels);\n }\n\n### Python\n\n\nBefore trying this sample, follow the Python setup instructions in the\n[BigQuery quickstart using\nclient libraries](/bigquery/docs/quickstarts/quickstart-client-libraries).\n\n\nFor more information, see the\n[BigQuery Python API\nreference documentation](/python/docs/reference/bigquery/latest).\n\n\nTo authenticate to BigQuery, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for client libraries](/bigquery/docs/authentication#client-libs).\n\n\n from google.cloud import https://cloud.google.com/python/docs/reference/bigquery/latest/\n\n # Construct a BigQuery client object.\n client = https://cloud.google.com/python/docs/reference/bigquery/latest/.https://cloud.google.com/python/docs/reference/bigquery/latest/google.cloud.bigquery.client.Client.html()\n\n # TODO(developer): Set dataset_id to the ID of the dataset to fetch.\n # dataset_id = \"your-project.your_dataset\"\n\n dataset = client.https://cloud.google.com/python/docs/reference/bigquery/latest/google.cloud.bigquery.client.Client.html#google_cloud_bigquery_client_Client_get_dataset(dataset_id) # Make an API request.\n dataset.labels = {\"color\": \"green\"}\n dataset = client.https://cloud.google.com/python/docs/reference/bigquery/latest/google.cloud.bigquery.client.Client.html#google_cloud_bigquery_client_Client_update_dataset(dataset, [\"labels\"]) # Make an API request.\n\n print(\"Labels added to {}\".format(dataset_id))\n\nWhat's next\n-----------\n\n\nTo search and filter code samples for other Google Cloud products, see the\n[Google Cloud sample browser](/docs/samples?product=bigquery)."]]