Aplicar um marcador
Mantenha tudo organizado com as coleções
Salve e categorize o conteúdo com base nas suas preferências.
Cria um filtro que aplica um rótulo.
Mais informações
Para ver a documentação detalhada que inclui este exemplo de código, consulte:
Exemplo de código
Exceto em caso de indicação contrária, o conteúdo desta página é licenciado de acordo com a Licença de atribuição 4.0 do Creative Commons, e as amostras de código são licenciadas de acordo com a Licença Apache 2.0. Para mais detalhes, consulte as políticas do site do Google Developers. Java é uma marca registrada da Oracle e/ou afiliadas.
[[["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 code demonstrates how to create a filter that adds a "labelled" label to cells in a Bigtable read operation.\u003c/p\u003e\n"],["\u003cp\u003eThe filter is implemented using the \u003ccode\u003eApplyLabelTransformer\u003c/code\u003e or \u003ccode\u003elabel\u003c/code\u003e methods in multiple programming languages, including C++, C#, Java, Node.js, PHP, Python, and Ruby.\u003c/p\u003e\n"],["\u003cp\u003eThe code snippets show how to apply this label filter when reading rows from a Bigtable table, allowing you to mark or identify specific data during retrieval.\u003c/p\u003e\n"],["\u003cp\u003eAuthentication to Bigtable requires setting up Application Default Credentials, as referenced by the documentation.\u003c/p\u003e\n"],["\u003cp\u003eDetailed instructions for installing and using Bigtable client libraries are available in the Bigtable client libraries documentation.\u003c/p\u003e\n"]]],[],null,["Creates a filter that applies a label.\n\nExplore further\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Use filters](/bigtable/docs/using-filters)\n\nCode sample \n\nC++\n\n\nTo learn how to install and use the client library for Bigtable, see\n[Bigtable client libraries](/bigtable/docs/reference/libraries).\n\n\nTo authenticate to Bigtable, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n namespace cbt = ::google::cloud::bigtable;\n using ::google::cloud::StatusOr;\n [](cbt::Table table) {\n cbt::Filter filter = cbt::Filter::ApplyLabelTransformer(\"labelled\");\n // Read and print the rows.\n for (StatusOr\u003ccbt::Row\u003e& row :\n table.ReadRows(cbt::RowSet(cbt::RowRange::InfiniteRange()), filter)) {\n if (!row) throw std::move(row).status();\n std::cout \u003c\u003c row-\u003erow_key() \u003c\u003c \" = \";\n for (auto const& cell : row-\u003ecells()) {\n std::cout \u003c\u003c \"[\" \u003c\u003c cell.family_name() \u003c\u003c \", \"\n \u003c\u003c cell.column_qualifier() \u003c\u003c \", \" \u003c\u003c cell.value()\n \u003c\u003c \", label(\";\n for (auto const& label : cell.labels()) {\n std::cout \u003c\u003c label \u003c\u003c \",\";\n }\n std::cout \u003c\u003c \")],\";\n }\n std::cout \u003c\u003c \"\\n\";\n }\n }\n\nC#\n\n\nTo learn how to install and use the client library for Bigtable, see\n[Bigtable client libraries](/bigtable/docs/reference/libraries).\n\n\nTo authenticate to Bigtable, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n /// \u003csummary\u003e\n /// /// Read using a strip value filter from an existing table.\n ///\u003c/summary\u003e\n /// \u003cparam name=\"projectId\"\u003eYour Google Cloud Project ID.\u003c/param\u003e\n /// \u003cparam name=\"instanceId\"\u003eYour Google Cloud Bigtable Instance ID.\u003c/param\u003e\n /// \u003cparam name=\"tableId\"\u003eYour Google Cloud Bigtable table ID.\u003c/param\u003e\n\n public Task\u003cstring\u003e FilterModifyApplyLabel(string projectId = \"YOUR-PROJECT-ID\", string instanceId = \"YOUR-INSTANCE-ID\", string tableId = \"YOUR-TABLE-ID\")\n {\n // A filter that applies the given label to the outputted cell\n RowFilter filter = new RowFilter { ApplyLabelTransformer = \"labelled\" };\n return ReadFilter(projectId, instanceId, tableId, filter);\n }\n\nJava\n\n\nTo learn how to install and use the client library for Bigtable, see\n[Bigtable client libraries](/bigtable/docs/reference/libraries).\n\n\nTo authenticate to Bigtable, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n public static void filterModifyApplyLabel() {\n // TODO(developer): Replace these variables before running the sample.\n String projectId = \"my-project-id\";\n String instanceId = \"my-instance-id\";\n String tableId = \"mobile-time-series\";\n filterModifyApplyLabel(projectId, instanceId, tableId);\n }\n\n public static void filterModifyApplyLabel(String projectId, String instanceId, String tableId) {\n // A filter that applies the given label to the outputted cell\n Filter filter = FILTERS.label(\"labelled\");\n readFilter(projectId, instanceId, tableId, filter);\n }\n\nNode.js\n\n\nTo learn how to install and use the client library for Bigtable, see\n[Bigtable client libraries](/bigtable/docs/reference/libraries).\n\n\nTo authenticate to Bigtable, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n const filter = {\n label: 'labelled',\n };\n readWithFilter(filter);\n\nPHP\n\n\nTo learn how to install and use the client library for Bigtable, see\n[Bigtable client libraries](/bigtable/docs/reference/libraries).\n\n\nTo authenticate to Bigtable, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n use Google\\Cloud\\Bigtable\\BigtableClient;\n use Google\\Cloud\\Bigtable\\Filter;\n\n /**\n * Create a filter that applies a label\n *\n * @param string $projectId The Google Cloud project ID\n * @param string $instanceId The ID of the Bigtable instance\n * @param string $tableId The ID of the table to read from\n */\n function filter_modify_apply_label(\n string $projectId,\n string $instanceId,\n string $tableId\n ): void {\n // Connect to an existing table with an existing instance.\n $dataClient = new BigtableClient([\n 'projectId' =\u003e $projectId,\n ]);\n $table = $dataClient-\u003etable($instanceId, $tableId);\n\n $filter = Filter::label('labelled');\n\n $rows = $table-\u003ereadRows([\n 'filter' =\u003e $filter\n ]);\n\n foreach ($rows as $key =\u003e $row) {\n // The \"print_row\" helper function is defined in https://cloud.google.com/bigtable/docs/samples/bigtable-reads-print\n print_row($key, $row);\n }\n }\n\nPython\n\n\nTo learn how to install and use the client library for Bigtable, see\n[Bigtable client libraries](/bigtable/docs/reference/libraries).\n\n\nTo authenticate to Bigtable, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n def filter_modify_apply_label(project_id, instance_id, table_id):\n from google.cloud import https://cloud.google.com/python/docs/reference/bigtable/latest/\n from google.cloud.bigtable import row_filters\n\n client = https://cloud.google.com/python/docs/reference/bigtable/latest/.https://cloud.google.com/python/docs/reference/bigtable/latest/google.cloud.bigtable.client.Client.html(project=project_id, admin=True)\n instance = https://cloud.google.com/python/docs/reference/bigtable/latest/google.cloud.bigtable.client.html.https://cloud.google.com/python/docs/reference/bigtable/latest/google.cloud.bigtable.client.Client.html#google_cloud_bigtable_client_Client_instance(instance_id)\n table = instance.table(table_id)\n\n rows = table.read_rows(filter_=row_filters.ApplyLabelFilter(label=\"labelled\"))\n for row in rows:\n print_row(row)\n\nRuby\n\n\nTo learn how to install and use the client library for Bigtable, see\n[Bigtable client libraries](/bigtable/docs/reference/libraries).\n\n\nTo authenticate to Bigtable, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n # instance_id = \"my-instance\"\n # table_id = \"my-table\"\n filter = Google::Cloud::Bigtable::RowFilter.label \"labelled\"\n read_with_filter instance_id, table_id, filter\n\nWhat's next\n\n\nTo search and filter code samples for other Google Cloud products, see the\n[Google Cloud sample browser](/docs/samples?product=bigtable)."]]