Membaca menggunakan filter rantai
Tetap teratur dengan koleksi
Simpan dan kategorikan konten berdasarkan preferensi Anda.
Membuat filter komposit menggunakan chaining.
Mempelajari lebih lanjut
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[[["Mudah dipahami","easyToUnderstand","thumb-up"],["Memecahkan masalah saya","solvedMyProblem","thumb-up"],["Lainnya","otherUp","thumb-up"]],[["Sulit dipahami","hardToUnderstand","thumb-down"],["Informasi atau kode contoh salah","incorrectInformationOrSampleCode","thumb-down"],["Informasi/contoh yang saya butuhkan tidak ada","missingTheInformationSamplesINeed","thumb-down"],["Masalah terjemahan","translationIssue","thumb-down"],["Lainnya","otherDown","thumb-down"]],[],[[["\u003cp\u003eThis code demonstrates how to create a composite filter in Bigtable using filter chaining.\u003c/p\u003e\n"],["\u003cp\u003eThe composite filter selects data based on multiple criteria, such as the latest cell per column and within a specific column family (e.g., "cell_plan").\u003c/p\u003e\n"],["\u003cp\u003eThe examples are presented in multiple languages, including C++, C#, Go, Java, Node.js, PHP, Python, and Ruby, to provide flexibility for any user.\u003c/p\u003e\n"],["\u003cp\u003eThe content also includes instructions on how to set up authentication and install the client libraries needed for Bigtable.\u003c/p\u003e\n"]]],[],null,["Creates a composite filter using chaining.\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::Chain(\n cbt::Filter::Latest(1), cbt::Filter::FamilyRegex(\"cell_plan\"));\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 chain 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 FilterComposingChain(string projectId = \"YOUR-PROJECT-ID\", string instanceId = \"YOUR-INSTANCE-ID\", string tableId = \"YOUR-TABLE-ID\")\n {\n // A filter that selects one cell per column AND within the column family cell_plan\n RowFilter filter = RowFilters.Chain(RowFilters.CellsPerColumnLimit(1), RowFilters.FamilyNameExact(\"cell_plan\"));\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 filterComposingChain(w io.Writer, projectID, instanceID string, tableName string) error {\n \tfilter := bigtable.ChainFilters(bigtable.LatestNFilter(1), bigtable.FamilyFilter(\"cell_plan\"))\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 filterComposingChain() {\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 filterComposingChain(projectId, instanceId, tableId);\n }\n\n public static void filterComposingChain(String projectId, String instanceId, String tableId) {\n // A filter that selects one cell per column AND within the column family cell_plan\n Filter filter =\n FILTERS\n .chain()\n .filter(FILTERS.limit().cellsPerColumn(1))\n .filter(FILTERS.family().exactMatch(\"cell_plan\"));\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 {\n column: {\n cellLimit: 1,\n },\n },\n {\n family: 'cell_plan',\n },\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 composite filter using chaining\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_composing_chain(\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::chain()\n -\u003eaddFilter(Filter::limit()-\u003ecellsPerColumn(1))\n -\u003eaddFilter(Filter::family()-\u003eexactMatch('cell_plan'));\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_composing_chain(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.RowFilterChain(\n filters=[\n row_filters.CellsColumnLimitFilter(1),\n row_filters.FamilyNameRegexFilter(\"cell_plan\"),\n ]\n )\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.chain.cells_per_column(1).family(\"cell_plan\")\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)."]]