column family 나열
컬렉션을 사용해 정리하기
내 환경설정을 기준으로 콘텐츠를 저장하고 분류하세요.
column family를 나열합니다.
코드 샘플
달리 명시되지 않는 한 이 페이지의 콘텐츠에는 Creative Commons Attribution 4.0 라이선스에 따라 라이선스가 부여되며, 코드 샘플에는 Apache 2.0 라이선스에 따라 라이선스가 부여됩니다. 자세한 내용은 Google Developers 사이트 정책을 참조하세요. 자바는 Oracle 및/또는 Oracle 계열사의 등록 상표입니다.
[[["이해하기 쉬움","easyToUnderstand","thumb-up"],["문제가 해결됨","solvedMyProblem","thumb-up"],["기타","otherUp","thumb-up"]],[["이해하기 어려움","hardToUnderstand","thumb-down"],["잘못된 정보 또는 샘플 코드","incorrectInformationOrSampleCode","thumb-down"],["필요한 정보/샘플이 없음","missingTheInformationSamplesINeed","thumb-down"],["번역 문제","translationIssue","thumb-down"],["기타","otherDown","thumb-down"]],[],[[["\u003cp\u003eThis content demonstrates how to list column families within a Bigtable table using various programming languages such as C++, Java, Node.js, PHP, Python, and Ruby.\u003c/p\u003e\n"],["\u003cp\u003eThe code samples provided show how to retrieve and display column family names and their associated metadata, including garbage collection (GC) rules.\u003c/p\u003e\n"],["\u003cp\u003eInstructions on setting up authentication for Bigtable using Application Default Credentials are included and links to further details are provided.\u003c/p\u003e\n"],["\u003cp\u003eInstructions for accessing client libraries are provided, linking to the documentation.\u003c/p\u003e\n"],["\u003cp\u003eThe content also directs users to the Google Cloud sample browser for more code samples related to other Google Cloud products.\u003c/p\u003e\n"]]],[],null,["List column families.\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 namespace cbta = ::google::cloud::bigtable_admin;\n using ::google::cloud::StatusOr;\n [](cbta::BigtableTableAdminClient admin, std::string const& project_id,\n std::string const& instance_id, std::string const& table_id) {\n std::string table_name = cbt::TableName(project_id, instance_id, table_id);\n\n google::bigtable::admin::v2::GetTableRequest r;\n r.set_name(table_name);\n r.set_view(google::bigtable::admin::v2::Table::FULL);\n\n StatusOr\u003cgoogle::bigtable::admin::v2::Table\u003e schema =\n admin.GetTable(std::move(r));\n\n if (!schema) throw std::move(schema).status();\n for (auto const& kv : schema-\u003ecolumn_families()) {\n std::string const& column_family_name = kv.first;\n google::bigtable::admin::v2::ColumnFamily const& family = kv.second;\n std::cout \u003c\u003c \"Column family name: \" \u003c\u003c column_family_name \u003c\u003c \"\\n\"\n \u003c\u003c \"Column family metadata: \" \u003c\u003c family.DebugString() \u003c\u003c \"\\n\";\n }\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 // Lists all families in the table with GC rules.\n try {\n Table table = adminClient.getTable(tableId);\n Collection\u003cColumnFamily\u003e columnFamilies = table.getColumnFamilies();\n for (ColumnFamily columnFamily : columnFamilies) {\n System.out.printf(\n \"Column family: %s%nGC Rule: %s%n\",\n columnFamily.getId(), columnFamily.getGCRule().toString());\n }\n } catch (NotFoundException e) {\n System.err.println(\n \"Failed to list column families from a non-existent table: \" + e.getMessage());\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 // List all families in the table with GC rules\n const [families] = await table.getFamilies();\n // Print ID, GC Rule for each column family\n families.forEach(family =\u003e {\n const metadata = JSON.stringify(family.metadata);\n console.log(`Column family: ${family.id}, Metadata: ${metadata}`);\n /* Sample output:\n Column family: projects/{{projectId}}/instances/my-instance/tables/my-table/columnFamilies/cf4,\n Metadata: {\"gcRule\":{\"intersection\":{\"rules\":[{\"maxAge\":{\"seconds\":\"432000\",\"nanos\":0},\"rule\":\"maxAge\"},{\"maxNumVersions\":2,\"rule\":\"maxNumVersions\"}]},\"rule\":\"intersection\"}}\n */\n });\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\\Admin\\V2\\Client\\BigtableTableAdminClient;\n use Google\\Cloud\\Bigtable\\Admin\\V2\\GetTableRequest;\n\n /**\n * List column families of a table\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 for which the families need to be displayed\n */\n function list_column_families(\n string $projectId,\n string $instanceId,\n string $tableId\n ): void {\n $tableAdminClient = new BigtableTableAdminClient();\n\n $tableName = $tableAdminClient-\u003etableName($projectId, $instanceId, $tableId);\n $getTableRequest = (new GetTableRequest())\n -\u003esetName($tableName);\n\n $table = $tableAdminClient-\u003egetTable($getTableRequest);\n $columnFamilies = $table-\u003egetColumnFamilies()-\u003egetIterator();\n\n foreach ($columnFamilies as $k =\u003e $columnFamily) {\n printf('Column Family: %s' . PHP_EOL, $k);\n print('GC Rule:' . PHP_EOL);\n printf('%s' . PHP_EOL, $columnFamily-\u003eserializeToJsonString());\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 print(\"Printing Column Family and GC Rule for all column families...\")\n column_families = table.list_column_families()\n for column_family_name, gc_rule in sorted(column_families.items()):\n print(\"Column Family:\", column_family_name)\n print(\"GC Rule:\")\n print(gc_rule.to_pb())\n # Sample output:\n # Column Family: cf4\n # GC Rule:\n # gc_rule {\n # intersection {\n # rules {\n # max_age {\n # seconds: 432000\n # }\n # }\n # rules {\n # max_num_versions: 2\n # }\n # }\n # }\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 table = bigtable.table(\n instance_id,\n table_id,\n view: :FULL,\n perform_lookup: true\n )\n table.column_families.each do |name, family|\n puts \"Column family name: #{name}\"\n puts \"GC Rule:\"\n p family.gc_rule\n end\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)."]]