使用資料值規則運算式篩選器讀取 (HBase)
透過集合功能整理內容
你可以依據偏好儲存及分類內容。
使用規則運算式,在儲存格值上建立限制篩選器。
深入探索
如需包含這個程式碼範例的詳細說明文件,請參閱下列內容:
程式碼範例
Java
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[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["難以理解","hardToUnderstand","thumb-down"],["資訊或程式碼範例有誤","incorrectInformationOrSampleCode","thumb-down"],["缺少我需要的資訊/範例","missingTheInformationSamplesINeed","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],[],[[["\u003cp\u003eThis content demonstrates how to apply a regex-based filter to cell values in Bigtable.\u003c/p\u003e\n"],["\u003cp\u003eIt utilizes the \u003ccode\u003eValueFilter\u003c/code\u003e class with a \u003ccode\u003eRegexStringComparator\u003c/code\u003e to filter cell values.\u003c/p\u003e\n"],["\u003cp\u003eThe code sample shows how to set up and use a value filter in a scan operation.\u003c/p\u003e\n"],["\u003cp\u003eThe filter example specifically matches cell values that start with "PQ2A" and end with any character.\u003c/p\u003e\n"]]],[],null,["Creates a limiting filter on a cell value using a regex.\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\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 filterLimitValueRegex() {\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 filterLimitValueRegex(projectId, instanceId, tableId);\n }\n\n public static void filterLimitValueRegex(String projectId, String instanceId, String tableId) {\n // A filter that matches cells whose value satisfies the given regex\n Filter filter = new ValueFilter(CompareOp.EQUAL, new RegexStringComparator(\"PQ2A.*$\"));\n\n Scan scan = new Scan().setFilter(filter);\n readWithFilter(projectId, instanceId, tableId, scan);\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)."]]