Ler linhas com um prefixo (HBase)
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Criar uma consulta com um prefixo.
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Para ver a documentação detalhada que inclui este exemplo de código, consulte:
Exemplo de código
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[[["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 content demonstrates how to read a range of rows from a Bigtable table using a row prefix in Java.\u003c/p\u003e\n"],["\u003cp\u003eThe code initializes a Bigtable client connection and retrieves a specific table using the project ID, instance ID, and table ID.\u003c/p\u003e\n"],["\u003cp\u003eA \u003ccode\u003eScan\u003c/code\u003e object is configured with a row prefix filter to only include rows that start with "phone".\u003c/p\u003e\n"],["\u003cp\u003eThe sample then iterates through the \u003ccode\u003eResultScanner\u003c/code\u003e to process and print each row matching the specified prefix.\u003c/p\u003e\n"],["\u003cp\u003eAdditional resources are provided, including links to documentation on reading data, Bigtable client libraries, and setting up authentication for local development.\u003c/p\u003e\n"]]],[],null,["Create a query with a prefix.\n\nExplore further\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Read examples](/bigtable/docs/reading-data)\n\nCode sample \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\n /**\n * Example of reading a range of rows using a row prefix.\n */\n public static void readPrefix() {\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 readPrefix(projectId, instanceId, tableId);\n }\n\n public static void readPrefix(String projectId, String instanceId, String tableId) {\n // Initialize client that will be used to send requests. This client only needs to be created\n // once, and can be reused for multiple requests.\n try (Connection connection = BigtableConfiguration.connect(projectId, instanceId)) {\n Table table = connection.getTable(TableName.valueOf(tableId));\n Scan prefixScan = new Scan().setRowPrefixFilter(Bytes.toBytes(\"phone\"));\n ResultScanner rows = table.getScanner(prefixScan);\n\n for (Result row : rows) {\n printRow(row);\n }\n } catch (IOException e) {\n System.out.println(\n \"Unable to initialize service client, as a network error occurred: \\n\" + e.toString());\n }\n }\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)."]]