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程式碼範例
C++
如要瞭解如何安裝及使用 Bigtable 的用戶端程式庫,請參閱這篇文章。
如要向 Bigtable 進行驗證,請設定應用程式預設憑證。
詳情請參閱「為本機開發環境設定驗證」。
C#
如要瞭解如何安裝及使用 Bigtable 的用戶端程式庫,請參閱這篇文章。
如要向 Bigtable 進行驗證,請設定應用程式預設憑證。
詳情請參閱「為本機開發環境設定驗證」。
Java
如要瞭解如何安裝及使用 Bigtable 的用戶端程式庫,請參閱這篇文章。
如要向 Bigtable 進行驗證,請設定應用程式預設憑證。
詳情請參閱「為本機開發環境設定驗證」。
Node.js
如要瞭解如何安裝及使用 Bigtable 的用戶端程式庫,請參閱這篇文章。
如要向 Bigtable 進行驗證,請設定應用程式預設憑證。
詳情請參閱「為本機開發環境設定驗證」。
PHP
如要瞭解如何安裝及使用 Bigtable 的用戶端程式庫,請參閱這篇文章。
如要向 Bigtable 進行驗證,請設定應用程式預設憑證。
詳情請參閱「為本機開發環境設定驗證」。
Python
如要瞭解如何安裝及使用 Bigtable 的用戶端程式庫,請參閱這篇文章。
如要向 Bigtable 進行驗證,請設定應用程式預設憑證。
詳情請參閱「為本機開發環境設定驗證」。
Ruby
如要瞭解如何安裝及使用 Bigtable 的用戶端程式庫,請參閱這篇文章。
如要向 Bigtable 進行驗證,請設定應用程式預設憑證。
詳情請參閱「為本機開發環境設定驗證」。
除非另有註明,否則本頁面中的內容是採用創用 CC 姓名標示 4.0 授權,程式碼範例則為阿帕契 2.0 授權。詳情請參閱《Google Developers 網站政策》。Java 是 Oracle 和/或其關聯企業的註冊商標。
[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["難以理解","hardToUnderstand","thumb-down"],["資訊或程式碼範例有誤","incorrectInformationOrSampleCode","thumb-down"],["缺少我需要的資訊/範例","missingTheInformationSamplesINeed","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["其他","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)."]]