Lire à l'aide d'un filtre d'expression régulière dans la famille
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Crée un filtre de limitation sur une famille de colonnes avec une expression régulière.
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Pour obtenir une documentation détaillée incluant cet exemple de code, consultez les pages suivantes :
Exemple de code
Sauf indication contraire, le contenu de cette page est régi par une licence Creative Commons Attribution 4.0, et les échantillons de code sont régis par une licence Apache 2.0. Pour en savoir plus, consultez les Règles du site Google Developers. Java est une marque déposée d'Oracle et/ou de ses sociétés affiliées.
[[["Facile à comprendre","easyToUnderstand","thumb-up"],["J'ai pu résoudre mon problème","solvedMyProblem","thumb-up"],["Autre","otherUp","thumb-up"]],[["Difficile à comprendre","hardToUnderstand","thumb-down"],["Informations ou exemple de code incorrects","incorrectInformationOrSampleCode","thumb-down"],["Il n'y a pas l'information/les exemples dont j'ai besoin","missingTheInformationSamplesINeed","thumb-down"],["Problème de traduction","translationIssue","thumb-down"],["Autre","otherDown","thumb-down"]],[],[[["\u003cp\u003eThis code demonstrates how to apply a filter to limit results to specific column families in a Bigtable table using a regular expression.\u003c/p\u003e\n"],["\u003cp\u003eThe filter uses the regex pattern \u003ccode\u003estats_.*$\u003c/code\u003e to match column families whose names start with "stats_".\u003c/p\u003e\n"],["\u003cp\u003eMultiple languages are covered (C++, C#, Go, Java, Node.js, PHP, Python, Ruby) with examples showing the implementation of the filtering functionality.\u003c/p\u003e\n"],["\u003cp\u003eThe examples require authentication and that you set up Application Default Credentials to run the code.\u003c/p\u003e\n"],["\u003cp\u003eThe examples make use of each languages respected Bigtable Client Library, which are documented to get started.\u003c/p\u003e\n"]]],[],null,["Creates a limiting filter on a column family with a regex.\n\nExplore further\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Use filters](/bigtable/docs/using-filters)\n\nCode sample \n\nC++\n\n\nTo learn how to install and use the client library for Bigtable, see\n[Bigtable client libraries](/bigtable/docs/reference/libraries).\n\n\nTo authenticate to Bigtable, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n namespace cbt = ::google::cloud::bigtable;\n using ::google::cloud::StatusOr;\n [](cbt::Table table) {\n cbt::Filter filter = cbt::Filter::FamilyRegex(\"stats_.*$\");\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() \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 family regex 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 FilterLimitColFamilyRegex(string projectId, string instanceId, string tableId)\n {\n // A filter that matches cells whose column family satisfies the given regex\n RowFilter filter = RowFilters.FamilyNameRegex(\"stats_.*$\");\n return ReadFilter(projectId, instanceId, tableId, filter);\n }\n\nGo\n\n\nTo learn how to install and use the client library for Bigtable, see\n[Bigtable client libraries](/bigtable/docs/reference/libraries).\n\n\nTo authenticate to Bigtable, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n func filterLimitColFamilyRegex(w io.Writer, projectID, instanceID string, tableName string) error {\n \tfilter := bigtable.FamilyFilter(\"stats_.*$\")\n \treturn readWithFilter(w, projectID, instanceID, tableName, 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 filterLimitColFamilyRegex() {\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 filterLimitColFamilyRegex(projectId, instanceId, tableId);\n }\n\n public static void filterLimitColFamilyRegex(\n String projectId, String instanceId, String tableId) {\n // A filter that matches cells whose column family satisfies the given regex\n Filter filter = FILTERS.family().regex(\"stats_.*$\");\n readFilter(projectId, instanceId, tableId, filter);\n }\n\nNode.js\n\n\nTo learn how to install and use the client library for Bigtable, see\n[Bigtable client libraries](/bigtable/docs/reference/libraries).\n\n\nTo authenticate to Bigtable, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n const filter = {\n family: /stats_.*$/,\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 limiting filter on a column family with a regex\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_limit_col_family_regex(\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 $filter = Filter::family()-\u003eregex('stats_.*$');\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, $row);\n }\n }\n\nPython\n\n\nTo learn how to install and use the client library for Bigtable, see\n[Bigtable client libraries](/bigtable/docs/reference/libraries).\n\n\nTo authenticate to Bigtable, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n def filter_limit_col_family_regex(project_id, instance_id, table_id):\n from google.cloud import https://cloud.google.com/python/docs/reference/bigtable/latest/\n from google.cloud.bigtable import row_filters\n\n client = https://cloud.google.com/python/docs/reference/bigtable/latest/.https://cloud.google.com/python/docs/reference/bigtable/latest/google.cloud.bigtable.client.Client.html(project=project_id, admin=True)\n instance = https://cloud.google.com/python/docs/reference/bigtable/latest/google.cloud.bigtable.client.html.https://cloud.google.com/python/docs/reference/bigtable/latest/google.cloud.bigtable.client.Client.html#google_cloud_bigtable_client_Client_instance(instance_id)\n table = instance.table(table_id)\n\n rows = table.read_rows(\n filter_=row_filters.FamilyNameRegexFilter(\"stats_.*$\".encode(\"utf-8\"))\n )\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.family \"stats_.*$\"\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)."]]