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[[["Fácil de entender","easyToUnderstand","thumb-up"],["Meu problema foi resolvido","solvedMyProblem","thumb-up"],["Outro","otherUp","thumb-up"]],[["Difícil de entender","hardToUnderstand","thumb-down"],["Informações incorretas ou exemplo de código","incorrectInformationOrSampleCode","thumb-down"],["Não contém as informações/amostras de que eu preciso","missingTheInformationSamplesINeed","thumb-down"],["Problema na tradução","translationIssue","thumb-down"],["Outro","otherDown","thumb-down"]],[],[[["\u003cp\u003eThis content demonstrates how to list and filter BigQuery datasets based on their assigned labels using different programming languages, such as Go, Java, Node.js, and Python.\u003c/p\u003e\n"],["\u003cp\u003eEach code sample provides a method for authenticating to BigQuery using Application Default Credentials, along with instructions on necessary setup procedures.\u003c/p\u003e\n"],["\u003cp\u003eThe primary filtering criterion used in all examples is the label "color:green", which showcases how to apply a specific label-based filter across various language implementations.\u003c/p\u003e\n"],["\u003cp\u003eThe content provides links to detailed documentation and API reference guides for BigQuery in Go, Java, Node.js, and Python, allowing users to explore more in-depth information.\u003c/p\u003e\n"],["\u003cp\u003eA link to the Google Cloud sample browser is included to allow users to search and filter code samples for other Google Cloud products, helping them find additional relevant examples.\u003c/p\u003e\n"]]],[],null,["# List by label\n\nList datasets, filtering by labels.\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Filtering resources using labels](/bigquery/docs/filtering-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 \t\"io\"\n\n \t\"cloud.google.com/go/bigquery\"\n \t\"google.golang.org/api/iterator\"\n )\n\n // listDatasetsByLabel demonstrates walking the collection of datasets in a project, and\n // filtering that list to a subset that has specific label metadata.\n func listDatasetsByLabel(w io.Writer, projectID string) error {\n \t// projectID := \"my-project-id\"\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 \tit := client.https://cloud.google.com/go/docs/reference/cloud.google.com/go/bigquery/latest/index.html#cloud_google_com_go_bigquery_Client_Datasets(ctx)\n \tit.https://cloud.google.com/go/docs/reference/cloud.google.com/go/bigquery/latest/migration/apiv2alpha/migrationpb.html#cloud_google_com_go_bigquery_migration_apiv2alpha_migrationpb_Filter = \"labels.color:green\"\n \tfor {\n \t\tdataset, err := it.Next()\n \t\tif err == iterator.Done {\n \t\t\tbreak\n \t\t}\n \t\tif err != nil {\n \t\t\treturn err\n \t\t}\n \t\tfmt.Fprintf(w, \"dataset: %s\\n\", dataset.DatasetID)\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.api.gax.paging.https://cloud.google.com/java/docs/reference/gax/latest/com.google.api.gax.paging.Page.html;\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\n // Sample to get list of datasets by label\n public class ListDatasetsByLabel {\n\n public static void main(String[] args) {\n // TODO(developer): Replace these variables before running the sample.\n String projectId = \"MY_PROJECT_ID\";\n String filter = \"MY_LABEL_FILTER\";\n listDatasetsByLabel(projectId, filter);\n }\n\n public static void listDatasetsByLabel(String projectId, String filter) {\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 Page\u003cDataset\u003e datasets =\n bigquery.https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQuery.html#com_google_cloud_bigquery_BigQuery_listDatasets_com_google_cloud_bigquery_BigQuery_DatasetListOption____(\n projectId,\n BigQuery.DatasetListOption.pageSize(100),\n BigQuery.DatasetListOption.labelFilter(filter)); // \"labels.color:green\"\n if (datasets == null) {\n System.out.println(\"Dataset does not contain any models\");\n return;\n }\n datasets\n .iterateAll()\n .forEach(\n dataset -\u003e System.out.printf(\"Success! Dataset ID: %s \", dataset.getDatasetId()));\n } catch (https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQueryException.html e) {\n System.out.println(\"Project does not contain any datasets \\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 listDatasetsByLabel() {\n // Lists all datasets in current GCP project, filtering by label color:green.\n\n const options = {\n filter: 'labels.color:green',\n };\n // Lists all datasets in the specified project\n const [datasets] = await bigquery.https://cloud.google.com/nodejs/docs/reference/bigquery/latest/bigquery/bigquery.html(options);\n\n console.log('Datasets:');\n datasets.forEach(dataset =\u003e console.log(dataset.id));\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 label_filter = \"labels.color:green\"\n datasets = list(client.https://cloud.google.com/python/docs/reference/bigquery/latest/google.cloud.bigquery.client.Client.html#google_cloud_bigquery_client_Client_list_datasets(filter=label_filter)) # Make an API request.\n\n if datasets:\n print(\"Datasets filtered by {}:\".format(label_filter))\n for dataset in datasets:\n print(\"\\t{}.{}\".format(dataset.project, dataset.dataset_id))\n else:\n print(\"No datasets found with this filter.\")\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)."]]