Límite de versiones
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Crea un filtro para limitar la cantidad de versiones de columnas que se recuperarán.
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Para obtener documentación en la que se incluye esta muestra de código, consulta lo siguiente:
Muestra de código
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[[["Fácil de comprender","easyToUnderstand","thumb-up"],["Resolvió mi problema","solvedMyProblem","thumb-up"],["Otro","otherUp","thumb-up"]],[["Difícil de entender","hardToUnderstand","thumb-down"],["Información o código de muestra incorrectos","incorrectInformationOrSampleCode","thumb-down"],["Faltan la información o los ejemplos que necesito","missingTheInformationSamplesINeed","thumb-down"],["Problema de traducción","translationIssue","thumb-down"],["Otro","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)."]]
