Limite de versões
Mantenha tudo organizado com as coleções
Salve e categorize o conteúdo com base nas suas preferências.
Crie um filtro para limitar o número de versões de colunas a serem recuperadas.
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 page provides code samples demonstrating how to filter and limit the number of versions of columns retrieved from Bigtable.\u003c/p\u003e\n"],["\u003cp\u003eCode examples are provided in C++, C#, Java, Node.js, Python, and Ruby, illustrating how to set up filters for column version retrieval.\u003c/p\u003e\n"],["\u003cp\u003eThe samples demonstrate how to limit the number of cell versions per column, typically to retrieve only the most recent cell version.\u003c/p\u003e\n"],["\u003cp\u003eInstructions are included to install and use the client libraries, as well as set up application default credentials for authenticating to Bigtable.\u003c/p\u003e\n"],["\u003cp\u003eLinks to further resources are provided, including Bigtable client libraries, setting up local authentication, and the Google Cloud sample browser.\u003c/p\u003e\n"]]],[],null,["Create a filter to limit the number of versions of columns to retrieve.\n\nExplore further\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [C# hello world](/bigtable/docs/samples-c-sharp-hello)\n- [C++ hello world](/bigtable/docs/samples-cpp-hello)\n- [Node.js hello world](/bigtable/docs/samples-nodejs-hello)\n- [Python hello world](/bigtable/docs/samples-python-hello)\n- [Ruby hello world](/bigtable/docs/samples-ruby-hello)\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 cbt::Filter filter = cbt::Filter::ColumnRangeClosed(\"family\", \"c0\", \"c0\");\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 RowFilter filter = RowFilters.CellsPerRowLimit(1);\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 void filterLimitCellsPerCol(String tableId) {\n // A filter that matches only the most recent cell within each column\n Filter filter = FILTERS.limit().cellsPerColumn(1);\n readRowFilter(tableId, filter);\n readFilter(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, // Only retrieve the most recent version of the cell.\n },\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 # Create a filter to only retrieve the most recent version of the cell\n # for each column across entire row.\n row_filter = bigtable.row_filters.CellsColumnLimitFilter(1)\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 # Only retrieve the most recent version of the cell.\n filter = Google::Cloud::Bigtable::RowFilter.cells_per_column 1\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)."]]
