{"id":1345,"date":"2023-03-19T22:22:58","date_gmt":"2023-03-19T14:22:58","guid":{"rendered":"http:\/\/viplao.com\/?p=1345"},"modified":"2023-03-19T22:23:01","modified_gmt":"2023-03-19T14:23:01","slug":"%e3%80%90%e8%bf%90%e7%bb%b4%e5%b7%a5%e5%85%b7%e3%80%91flink-sql-%e5%ae%9e%e8%b7%b513-%e7%bb%b4%e8%a1%a8-join-%e7%9a%84%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e4%b9%8b%e8%b7%af%ef%bc%88%e4%b8%8a%ef%bc%89","status":"publish","type":"post","link":"http:\/\/viplao.com\/index.php\/2023\/03\/19\/%e3%80%90%e8%bf%90%e7%bb%b4%e5%b7%a5%e5%85%b7%e3%80%91flink-sql-%e5%ae%9e%e8%b7%b513-%e7%bb%b4%e8%a1%a8-join-%e7%9a%84%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e4%b9%8b%e8%b7%af%ef%bc%88%e4%b8%8a%ef%bc%89\/","title":{"rendered":"\u3010\u8fd0\u7ef4\u5de5\u5177\u3011Flink SQL \u5b9e\u8df513 \u7ef4\u8868 join \u7684\u6027\u80fd\u4f18\u5316\u4e4b\u8def\uff08\u4e0a\uff09\u9644\u6e90\u7801"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_71 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u6587\u7ae0\u76ee\u5f55<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"http:\/\/viplao.com\/index.php\/2023\/03\/19\/%e3%80%90%e8%bf%90%e7%bb%b4%e5%b7%a5%e5%85%b7%e3%80%91flink-sql-%e5%ae%9e%e8%b7%b513-%e7%bb%b4%e8%a1%a8-join-%e7%9a%84%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e4%b9%8b%e8%b7%af%ef%bc%88%e4%b8%8a%ef%bc%89\/#1%E5%BA%8F%E7%AF%87\" title=\"1.\u5e8f\u7bc7\">1.\u5e8f\u7bc7<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"http:\/\/viplao.com\/index.php\/2023\/03\/19\/%e3%80%90%e8%bf%90%e7%bb%b4%e5%b7%a5%e5%85%b7%e3%80%91flink-sql-%e5%ae%9e%e8%b7%b513-%e7%bb%b4%e8%a1%a8-join-%e7%9a%84%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e4%b9%8b%e8%b7%af%ef%bc%88%e4%b8%8a%ef%bc%89\/#2%E8%83%8C%E6%99%AF%E5%8F%8A%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF%E4%BB%8B%E7%BB%8D\" title=\"2.\u80cc\u666f\u53ca\u5e94\u7528\u573a\u666f\u4ecb\u7ecd\">2.\u80cc\u666f\u53ca\u5e94\u7528\u573a\u666f\u4ecb\u7ecd<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"http:\/\/viplao.com\/index.php\/2023\/03\/19\/%e3%80%90%e8%bf%90%e7%bb%b4%e5%b7%a5%e5%85%b7%e3%80%91flink-sql-%e5%ae%9e%e8%b7%b513-%e7%bb%b4%e8%a1%a8-join-%e7%9a%84%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e4%b9%8b%e8%b7%af%ef%bc%88%e4%b8%8a%ef%bc%89\/#3%E6%9D%A5%E4%B8%80%E4%B8%AA%E5%AE%9E%E6%88%98%E6%A1%88%E4%BE%8B\" title=\"3.\u6765\u4e00\u4e2a\u5b9e\u6218\u6848\u4f8b\">3.\u6765\u4e00\u4e2a\u5b9e\u6218\u6848\u4f8b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"http:\/\/viplao.com\/index.php\/2023\/03\/19\/%e3%80%90%e8%bf%90%e7%bb%b4%e5%b7%a5%e5%85%b7%e3%80%91flink-sql-%e5%ae%9e%e8%b7%b513-%e7%bb%b4%e8%a1%a8-join-%e7%9a%84%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e4%b9%8b%e8%b7%af%ef%bc%88%e4%b8%8a%ef%bc%89\/#4flink_sql_lookup_join\" title=\"4.flink sql lookup join\">4.flink sql lookup join<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"http:\/\/viplao.com\/index.php\/2023\/03\/19\/%e3%80%90%e8%bf%90%e7%bb%b4%e5%b7%a5%e5%85%b7%e3%80%91flink-sql-%e5%ae%9e%e8%b7%b513-%e7%bb%b4%e8%a1%a8-join-%e7%9a%84%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e4%b9%8b%e8%b7%af%ef%bc%88%e4%b8%8a%ef%bc%89\/#41lookup_join_%E5%AE%9A%E4%B9%89\" title=\"4.1.lookup join \u5b9a\u4e49\">4.1.lookup join \u5b9a\u4e49<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"http:\/\/viplao.com\/index.php\/2023\/03\/19\/%e3%80%90%e8%bf%90%e7%bb%b4%e5%b7%a5%e5%85%b7%e3%80%91flink-sql-%e5%ae%9e%e8%b7%b513-%e7%bb%b4%e8%a1%a8-join-%e7%9a%84%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e4%b9%8b%e8%b7%af%ef%bc%88%e4%b8%8a%ef%bc%89\/#42%E4%B8%8A%E8%BF%B0%E6%A1%88%E4%BE%8B%E8%A7%A3%E5%86%B3%E6%96%B9%E6%A1%88\" title=\"4.2.\u4e0a\u8ff0\u6848\u4f8b\u89e3\u51b3\u65b9\u6848\">4.2.\u4e0a\u8ff0\u6848\u4f8b\u89e3\u51b3\u65b9\u6848<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"http:\/\/viplao.com\/index.php\/2023\/03\/19\/%e3%80%90%e8%bf%90%e7%bb%b4%e5%b7%a5%e5%85%b7%e3%80%91flink-sql-%e5%ae%9e%e8%b7%b513-%e7%bb%b4%e8%a1%a8-join-%e7%9a%84%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e4%b9%8b%e8%b7%af%ef%bc%88%e4%b8%8a%ef%bc%89\/#43%E5%85%B3%E4%BA%8E%E7%BB%B4%E8%A1%A8%E4%BD%BF%E7%94%A8%E7%9A%84%E4%B8%80%E4%BA%9B%E6%B3%A8%E6%84%8F%E4%BA%8B%E9%A1%B9\" title=\"4.3.\u5173\u4e8e\u7ef4\u8868\u4f7f\u7528\u7684\u4e00\u4e9b\u6ce8\u610f\u4e8b\u9879\">4.3.\u5173\u4e8e\u7ef4\u8868\u4f7f\u7528\u7684\u4e00\u4e9b\u6ce8\u610f\u4e8b\u9879<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"http:\/\/viplao.com\/index.php\/2023\/03\/19\/%e3%80%90%e8%bf%90%e7%bb%b4%e5%b7%a5%e5%85%b7%e3%80%91flink-sql-%e5%ae%9e%e8%b7%b513-%e7%bb%b4%e8%a1%a8-join-%e7%9a%84%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e4%b9%8b%e8%b7%af%ef%bc%88%e4%b8%8a%ef%bc%89\/#44%E5%86%8D%E8%AF%B4%E8%AF%B4%E7%BB%B4%E8%A1%A8%E5%B8%B8%E8%A7%81%E7%9A%84%E6%80%A7%E8%83%BD%E9%97%AE%E9%A2%98%E5%8F%8A%E4%BC%98%E5%8C%96%E6%80%9D%E8%B7%AF\" title=\"4.4.\u518d\u8bf4\u8bf4\u7ef4\u8868\u5e38\u89c1\u7684\u6027\u80fd\u95ee\u9898\u53ca\u4f18\u5316\u601d\u8def\">4.4.\u518d\u8bf4\u8bf4\u7ef4\u8868\u5e38\u89c1\u7684\u6027\u80fd\u95ee\u9898\u53ca\u4f18\u5316\u601d\u8def<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"http:\/\/viplao.com\/index.php\/2023\/03\/19\/%e3%80%90%e8%bf%90%e7%bb%b4%e5%b7%a5%e5%85%b7%e3%80%91flink-sql-%e5%ae%9e%e8%b7%b513-%e7%bb%b4%e8%a1%a8-join-%e7%9a%84%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e4%b9%8b%e8%b7%af%ef%bc%88%e4%b8%8a%ef%bc%89\/#45lookup_join_%E7%9A%84%E5%85%B7%E4%BD%93%E6%80%A7%E8%83%BD%E4%BC%98%E5%8C%96%E6%96%B9%E6%A1%88\" title=\"4.5.lookup join \u7684\u5177\u4f53\u6027\u80fd\u4f18\u5316\u65b9\u6848\">4.5.lookup join \u7684\u5177\u4f53\u6027\u80fd\u4f18\u5316\u65b9\u6848<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"http:\/\/viplao.com\/index.php\/2023\/03\/19\/%e3%80%90%e8%bf%90%e7%bb%b4%e5%b7%a5%e5%85%b7%e3%80%91flink-sql-%e5%ae%9e%e8%b7%b513-%e7%bb%b4%e8%a1%a8-join-%e7%9a%84%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e4%b9%8b%e8%b7%af%ef%bc%88%e4%b8%8a%ef%bc%89\/#46%E5%9F%BA%E4%BA%8E_redis_connector_%E7%9A%84%E6%89%B9%E9%87%8F%E8%AE%BF%E9%97%AE%E6%9C%BA%E5%88%B6%E4%BC%98%E5%8C%96\" title=\"4.6.\u57fa\u4e8e redis connector \u7684\u6279\u91cf\u8bbf\u95ee\u673a\u5236\u4f18\u5316\">4.6.\u57fa\u4e8e redis connector \u7684\u6279\u91cf\u8bbf\u95ee\u673a\u5236\u4f18\u5316<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"http:\/\/viplao.com\/index.php\/2023\/03\/19\/%e3%80%90%e8%bf%90%e7%bb%b4%e5%b7%a5%e5%85%b7%e3%80%91flink-sql-%e5%ae%9e%e8%b7%b513-%e7%bb%b4%e8%a1%a8-join-%e7%9a%84%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e4%b9%8b%e8%b7%af%ef%bc%88%e4%b8%8a%ef%bc%89\/#5%E6%80%BB%E7%BB%93%E4%B8%8E%E5%B1%95%E6%9C%9B\" title=\"5.\u603b\u7ed3\u4e0e\u5c55\u671b\">5.\u603b\u7ed3\u4e0e\u5c55\u671b<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1%E5%BA%8F%E7%AF%87\"><\/span>1.\u5e8f\u7bc7<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u6e90\u7801\u516c\u4f17\u53f7\u540e\u53f0\u56de\u590d<strong>1.13.2 sql lookup join<\/strong>\u83b7\u53d6\u3002<\/p>\n\n\n\n<p>\u5e9f\u8bdd\u4e0d\u591a\u8bf4\uff0c\u54b1\u4eec\u5148\u76f4\u63a5\u4e0a\u672c\u6587\u7684\u76ee\u5f55\u548c\u7ed3\u8bba\uff0c\u5c0f\u4f19\u4f34\u53ef\u4ee5\u5148\u770b\u7ed3\u8bba\u5feb\u901f\u4e86\u89e3\u535a\u4e3b\u671f\u671b\u672c\u6587\u80fd\u7ed9\u5c0f\u4f19\u4f34\u4eec\u5e26\u6765\u4ec0\u4e48\u5e2e\u52a9\uff1a<\/p>\n\n\n\n<ol>\n<li><strong>\u80cc\u666f\u53ca\u5e94\u7528\u573a\u666f\u4ecb\u7ecd<\/strong>\uff1a\u535a\u4e3b\u671f\u671b\u4f60\u80fd\u4e86\u89e3\u5230\uff0cflink sql \u63d0\u4f9b\u4e86\u8f7b\u677e\u8bbf\u95ee<strong>\u5916\u90e8\u5b58\u50a8<\/strong>\u7684 lookup join\uff08\u4e0e\u4e0a\u8282\u4e0d\u540c\uff0c\u4e0a\u8282\u8bf4\u7684\u662f\u6d41\u4e0e\u6d41\u7684 join\uff09\u3002lookup join \u53ef\u4ee5\u7b80\u5355\u7406\u89e3\u4e3a\u4f7f\u7528 flatmap \u8bbf\u95ee\u5916\u90e8\u5b58\u50a8\u6570\u636e\u7136\u540e\u5c06\u7ef4\u5ea6\u5b57\u6bb5\u62fc\u63a5\u5230\u5f53\u524d\u8fd9\u6761\u6570\u636e\u4e0a\u9762<\/li>\n\n\n\n<li><strong>\u6765\u4e00\u4e2a\u5b9e\u6218\u6848\u4f8b<\/strong>\uff1a\u535a\u4e3b\u4ee5\u66dd\u5149\u7528\u6237\u65e5\u5fd7\u6d41\u5173\u8054\u7528\u6237\u753b\u50cf\uff08\u5e74\u9f84\u3001\u6027\u522b\uff09\u7ef4\u8868\u4e3a\u4f8b\u4ecb\u7ecd lookup join \u5e94\u8be5\u8fbe\u5230\u7684\u5173\u8054\u7684\u9884\u671f\u6548\u679c\u3002<\/li>\n\n\n\n<li><strong>flink sql lookup join \u7684\u89e3\u51b3\u65b9\u6848\u4ee5\u53ca\u539f\u7406\u7684\u4ecb\u7ecd<\/strong>\uff1a\u4e3b\u8981\u4ecb\u7ecd lookup join \u7684\u5728\u4e0a\u8ff0\u5b9e\u6218\u6848\u4f8b\u7684 sql \u5199\u6cd5\uff0c\u535a\u4e3b\u671f\u671b\u4f60\u80fd\u4e86\u89e3\u5230\uff0clookup join \u662f\u57fa\u4e8e\u5904\u7406\u65f6\u95f4\u7684\uff0c\u5e76\u4e14 lookup join \u7ecf\u5e38\u4f1a\u7531\u4e8e\u8bbf\u95ee\u5916\u90e8\u5b58\u50a8\u7684 qps \u8fc7\u9ad8\u800c\u5bfc\u81f4\u80cc\u538b\uff0c\u4ea7\u51fa\u5ef6\u8fdf\u7b49\u6027\u80fd\u95ee\u9898\u3002\u6211\u4eec\u53ef\u4ee5\u501f\u9274\u5728 DataStream api \u4e2d\u7684\u7ef4\u8868 join \u4f18\u5316\u601d\u8def\u5728 flink sql \u4f7f\u7528&nbsp;<code>local cache<\/code>\uff0c<code>\u5f02\u6b65\u8bbf\u95ee\u7ef4\u8868<\/code>\uff0c<code>\u6279\u91cf\u8bbf\u95ee\u7ef4\u8868<\/code>\u4e09\u79cd\u65b9\u5f0f\u53bb\u89e3\u51b3\u6027\u80fd\u95ee\u9898\u3002<\/li>\n\n\n\n<li><strong>\u603b\u7ed3\u53ca\u5c55\u671b<\/strong>\uff1a\u5b98\u65b9\u5e76\u6ca1\u6709\u63d0\u4f9b&nbsp;<code>\u6279\u91cf\u8bbf\u95ee\u7ef4\u8868<\/code>&nbsp;\u7684\u80fd\u529b\uff0c\u56e0\u6b64\u535a\u4e3b\u81ea\u5df1\u5b9e\u73b0\u4e86\u4e00\u5957\uff0c\u5177\u4f53\u4f7f\u7528\u65b9\u5f0f\u548c\u539f\u7406\u5b9e\u73b0\u656c\u8bf7\u671f\u5f85\u4e0b\u7bc7\u6587\u7ae0\u3002<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2%E8%83%8C%E6%99%AF%E5%8F%8A%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF%E4%BB%8B%E7%BB%8D\"><\/span>2.\u80cc\u666f\u53ca\u5e94\u7528\u573a\u666f\u4ecb\u7ecd<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u7ef4\u8868\u4f5c\u4e3a sql \u4efb\u52a1\u4e2d\u4e00\u79cd\u5e38\u89c1\u8868\u7684\u7c7b\u578b\uff0c\u5176\u672c\u8d28\u5c31\u662f\u5173\u8054\u8868\u6570\u636e\u7684\u989d\u5916\u6570\u636e\u5c5e\u6027\uff0c\u901a\u5e38\u5728 join \u8bed\u53e5\u4e2d\u8fdb\u884c\u4f7f\u7528\u3002\u6bd4\u5982\u6e90\u6570\u636e\u6709\u4eba\u7684 id\uff0c\u4f60\u73b0\u5728\u60f3\u8981\u5f97\u5230\u4eba\u7684\u6027\u522b\u3001\u5e74\u9f84\uff0c\u90a3\u4e48\u53ef\u4ee5\u901a\u8fc7\u7528\u6237 id \u53bb\u5173\u8054\u4eba\u7684\u6027\u522b\u3001\u5e74\u9f84\uff0c\u5c31\u53ef\u4ee5\u5f97\u5230\u66f4\u5168\u7684\u6570\u636e\u3002<\/p>\n\n\n\n<p>\u7ef4\u8868 join \u5728\u79bb\u7ebf\u6570\u4ed3\u4e2d\u662f\u6700\u5e38\u89c1\u7684\u4e00\u79cd\u6570\u636e\u5904\u7406\u65b9\u5f0f\u4e86\uff0c\u5728\u5b9e\u65f6\u6570\u4ed3\u7684\u573a\u666f\u4e2d\uff0cflink sql \u76ee\u524d\u4e5f\u652f\u6301\u4e86\u7ef4\u8868\u7684 join\uff0c\u5373 lookup join\uff0c\u751f\u4ea7\u73af\u5883\u53ef\u4ee5\u7528 mysql\uff0credis\uff0chbase \u6765\u4f5c\u4e3a\u9ad8\u901f\u7ef4\u8868\u5b58\u50a8\u5f15\u64ce\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote\">\n<p>Notes\uff1a<br>\u5728\u5b9e\u65f6\u6570\u4ed3\u4e2d\uff0c\u5e38\u7528\u5b9e\u65f6\u7ef4\u8868\u6709\u4e24\u79cd\u66f4\u65b0\u9891\u7387<\/p>\n<\/blockquote>\n\n\n\n<ol>\n<li>\u5b9e\u65f6\u7684\u66f4\u65b0\uff1a\u7ef4\u5ea6\u4fe1\u606f\u662f\u5b9e\u65f6\u65b0\u5efa\u7684\uff0c\u5b9e\u65f6\u5199\u5165\u5230\u9ad8\u901f\u5b58\u50a8\u5f15\u64ce\u4e2d\u3002\u7136\u540e\u5176\u4ed6\u5b9e\u65f6\u4efb\u52a1\u5728\u505a\u5904\u7406\u65f6\u5b9e\u65f6\u7684\u5173\u8054\u8fd9\u4e9b\u7ef4\u5ea6\u4fe1\u606f\u3002<\/li>\n\n\n\n<li>\u5468\u671f\u6027\u7684\u66f4\u65b0\uff1a\u5bf9\u4e8e\u4e00\u4e9b\u7f13\u6162\u53d8\u5316\u7ef4\u5ea6\uff0c\u6bd4\u5982\u5e74\u9f84\u3001\u6027\u522b\u7684\u7528\u6237\u753b\u50cf\u7b49\uff0c\u51e0\u4e07\u5e74\u90fd\u4e0d\u53d8\u5316\u4e00\u6b21\u7684\u4e1c\u897f \uff0c\u5b9e\u65f6\u7ef4\u8868\u7684\u66f4\u65b0\u53ef\u4ee5\u662f\u5c0f\u65f6\u7ea7\u522b\uff0c\u5929\u7ea7\u522b\u7684\u3002<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3%E6%9D%A5%E4%B8%80%E4%B8%AA%E5%AE%9E%E6%88%98%E6%A1%88%E4%BE%8B\"><\/span>3.\u6765\u4e00\u4e2a\u5b9e\u6218\u6848\u4f8b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u6765\u770b\u770b\u5728\u5177\u4f53\u573a\u666f\u4e0b\uff0c\u5bf9\u5e94\u8f93\u5165\u503c\u7684\u8f93\u51fa\u503c\u5e94\u8be5\u957f\u5565\u6837\u3002<\/p>\n\n\n\n<p>\u9700\u6c42\u6307\u6807\uff1a\u4f7f\u7528\u66dd\u5149\u7528\u6237\u65e5\u5fd7\u6d41\uff08show_log\uff09\u5173\u8054\u7528\u6237\u753b\u50cf\u7ef4\u8868\uff08user_profile\uff09\u5173\u8054\u5230\u7528\u6237\u7684\u7ef4\u5ea6\u4e4b\u540e\uff0c\u63d0\u4f9b\u7ed9\u4e0b\u6e38\u8ba1\u7b97\u5206\u6027\u522b\uff0c\u5e74\u9f84\u6bb5\u7684\u66dd\u5149\u7528\u6237\u6570\u4f7f\u7528\u3002\u6b64\u5904\u6211\u4eec\u53ea\u5173\u5fc3\u5173\u8054\u7ef4\u8868\u8fd9\u4e00\u90e8\u5206\u7684\u8f93\u5165\u8f93\u51fa\u6570\u636e\u3002<\/p>\n\n\n\n<p>\u6765\u4e00\u6ce2\u8f93\u5165\u6570\u636e\uff1a<\/p>\n\n\n\n<p><strong>\u66dd\u5149\u7528\u6237\u65e5\u5fd7\u6d41\uff08show_log\uff09\u6570\u636e\uff08\u6570\u636e\u5b58\u50a8\u5728 kafka \u4e2d\uff09\uff1a<\/strong><\/p>\n\n\n\n<p><strong>\u7528\u6237\u753b\u50cf\u7ef4\u8868\uff08user_profile\uff09\u6570\u636e\uff08\u6570\u636e\u5b58\u50a8\u5728 redis \u4e2d\uff09\uff1a<\/strong><\/p>\n\n\n\n<p>\u6ce8\u610f\uff1aredis \u4e2d\u7684\u6570\u636e\u7ed3\u6784\u5b58\u50a8\u662f\u6309\u7167 key\uff0cvalue \u53bb\u5b58\u50a8\u7684\u3002\u5176\u4e2d key \u4e3a user_id\uff0cvalue \u4e3a age\uff0csex \u7684 json\u3002\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic4.zhimg.com\/80\/v2-e4fa1fdd57b2ddd3969c642cd33dcf23_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>user_profile redis<\/p>\n\n\n\n<p>\u9884\u671f\u8f93\u51fa\u6570\u636e\u5982\u4e0b\uff1a<\/p>\n\n\n\n<p>flink sql lookup join \u767b\u573a\u3002\u4e0b\u9762\u662f\u5b98\u7f51\u7684\u94fe\u63a5\u3002<\/p>\n\n\n\n<figure class=\"wp-block-embed\"><div class=\"wp-block-embed__wrapper\">\nhttps:\/\/nightlies.apache.org\/flink\/flink-docs-release-1.13\/docs\/dev\/table\/sql\/queries\/joins\/#lookup-join\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4flink_sql_lookup_join\"><\/span>4.flink sql lookup join<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"41lookup_join_%E5%AE%9A%E4%B9%89\"><\/span>4.1.lookup join \u5b9a\u4e49<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u4ee5\u4e0a\u8ff0\u6848\u4f8b\u6765\u8bf4\uff0clookup join \u5176\u5b9e\u7b80\u5355\u7406\u89e3\u6765\uff0c\u5c31\u662f\u6bcf\u6765\u4e00\u6761\u6570\u636e\u53bb redis \u91cc\u9762\u6402\u4e00\u6b21\u6570\u636e\u3002\u7136\u540e\u628a\u5173\u8054\u5230\u7684\u7ef4\u5ea6\u6570\u636e\u7ed9\u62fc\u63a5\u5230\u5f53\u524d\u6570\u636e\u4e2d\u3002<\/p>\n\n\n\n<p>\u719f\u6089 DataStream api \u7684\u5c0f\u4f19\u4f34\u840c\uff0c\u7b80\u5355\u6765\u7406\u89e3\uff0c\u5c31\u662f lookup join \u7684\u7b97\u5b50\u5c31\u662f DataStream api \u4e2d\u7684 flatmap \u7b97\u5b50\u4e2d\u5904\u7406\u6bcf\u4e00\u6761\u6765\u7684\u6570\u636e\uff0c\u9488\u5bf9\u6bcf\u4e00\u6761\u6570\u636e\u53bb\u8bbf\u95ee\u7528\u6237\u753b\u50cf\u7684 redis\u3002\uff08\u5b9e\u9645\u4e0a\uff0cflink sql api \u4e2d\u4e5f\u786e\u5b9e\u662f\u8fd9\u6837\u5b9e\u73b0\u7684\uff01sql \u751f\u6210\u7684 lookup join \u4ee3\u7801\u5c31\u662f\u7ee7\u627f\u4e86 flatmap\uff09<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"42%E4%B8%8A%E8%BF%B0%E6%A1%88%E4%BE%8B%E8%A7%A3%E5%86%B3%E6%96%B9%E6%A1%88\"><\/span>4.2.\u4e0a\u8ff0\u6848\u4f8b\u89e3\u51b3\u65b9\u6848<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u6765\u770b\u770b\u4e0a\u8ff0\u6848\u4f8b\u7684 flink sql lookup join sql \u600e\u4e48\u5199\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE show_log (\n    log_id BIGINT,\n    `timestamp` as cast(CURRENT_TIMESTAMP as timestamp(3)),\n    user_id STRING,\n    proctime AS PROCTIME()\n)\nWITH (\n  'connector' = 'datagen',\n  'rows-per-second' = '10',\n  'fields.user_id.length' = '1',\n  'fields.log_id.min' = '1',\n  'fields.log_id.max' = '10'\n);\n\nCREATE TABLE user_profile (\n    user_id STRING,\n    age STRING,\n    sex STRING\n    ) WITH (\n  'connector' = 'redis',\n  'hostname' = '127.0.0.1',\n  'port' = '6379',\n  'format' = 'json',\n  'lookup.cache.max-rows' = '500',\n  'lookup.cache.ttl' = '3600',\n  'lookup.max-retries' = '1'\n);\n\nCREATE TABLE sink_table (\n    log_id BIGINT,\n    `timestamp` TIMESTAMP(3),\n    user_id STRING,\n    proctime TIMESTAMP(3),\n    age STRING,\n    sex STRING\n) WITH (\n  'connector' = 'print'\n);\n\n-- lookup join \u7684 query \u903b\u8f91\nINSERT INTO sink_table\nSELECT \n    s.log_id as log_id\n    , s.`timestamp` as `timestamp`\n    , s.user_id as user_id\n    , s.proctime as proctime\n    , u.sex as sex\n    , u.age as age\nFROM show_log AS s\nLEFT JOIN user_profile FOR SYSTEM_TIME AS OF s.proctime AS u\nON s.user_id = u.user_id<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u4f7f\u7528\u4e86&nbsp;<code>for SYSTEM_TIME as of<\/code>&nbsp;\u65f6\u6001\u8868\u7684\u8bed\u6cd5\u6765\u4f5c\u4e3a\u7ef4\u8868\u5173\u8054\u7684\u6807\u8bc6\u8bed\u6cd5\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote\">\n<p>Notes\uff1a<br>\u5b9e\u65f6\u7684 lookup \u7ef4\u8868\u5173\u8054\u80fd\u4f7f\u7528\u5904\u7406\u65f6\u95f4\u53bb\u505a\u5173\u8054\u3002<\/p>\n<\/blockquote>\n\n\n\n<p>\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<p>flink web ui \u7b97\u5b50\u56fe\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic3.zhimg.com\/80\/v2-4dd37f58aba8f86e95ec2417a76845ce_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>flink web ui<\/p>\n\n\n\n<p>\u4f46\u662f\uff01\uff01\uff01\u4f46\u662f\uff01\uff01\uff01\u4f46\u662f\uff01\uff01\uff01<\/p>\n\n\n\n<p>flink \u5b98\u65b9\u5e76\u6ca1\u6709\u63d0\u4f9b redis \u7684\u7ef4\u8868 connector \u5b9e\u73b0\u3002<\/p>\n\n\n\n<p>\u6ca1\u9519\uff0c\u535a\u4e3b\u81ea\u5df1\u5b9e\u73b0\u4e86\u4e00\u5957\u3002\u5173\u4e8e redis \u7ef4\u8868\u7684 connector \u5b9e\u73b0\uff0c\u76f4\u63a5\u53c2\u8003\u4e0b\u9762\u7684\u6587\u7ae0\u3002\u90fd\u662f\u53ef\u4ee5\u4ece github \u4e0a\u627e\u5230\u6e90\u7801\u62ff\u6765\u7528\u7684\uff01<\/p>\n\n\n\n<p><a href=\"https:\/\/link.zhihu.com\/?target=http%3A\/\/mp.weixin.qq.com\/s%3F__biz%3DMzkxNjA1MzM5OQ%3D%3D%26mid%3D2247488635%26idx%3D1%26sn%3D41817a078ef456fb036e94072b2383ff%26chksm%3Dc1549883f623119559c47047c6d2a9540531e0e6f0b58b155ef9da17e37e32a9c486fe50f8e3%26scene%3D21%23wechat_redirect\" target=\"_blank\" rel=\"noreferrer noopener\">flink sql \u77e5\u5176\u6240\u4ee5\u7136\uff08\u4e8c\uff09| \u81ea\u5b9a\u4e49 redis \u6570\u636e\u7ef4\u8868\uff08\u9644\u6e90\u7801\uff09<\/a><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic4.zhimg.com\/80\/v2-e65e732461d2a726c46603bddc366943_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"43%E5%85%B3%E4%BA%8E%E7%BB%B4%E8%A1%A8%E4%BD%BF%E7%94%A8%E7%9A%84%E4%B8%80%E4%BA%9B%E6%B3%A8%E6%84%8F%E4%BA%8B%E9%A1%B9\"><\/span>4.3.\u5173\u4e8e\u7ef4\u8868\u4f7f\u7528\u7684\u4e00\u4e9b\u6ce8\u610f\u4e8b\u9879<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ol>\n<li><strong>\u540c\u4e00\u6761\u6570\u636e\u5173\u8054\u5230\u7684\u7ef4\u5ea6\u6570\u636e\u53ef\u80fd\u4e0d\u540c<\/strong>\uff1a\u5b9e\u65f6\u6570\u4ed3\u4e2d\u5e38\u7528\u7684<strong>\u5b9e\u65f6\u7ef4\u8868<\/strong>\u90fd\u662f\u5728\u4e0d\u65ad\u7684\u53d8\u5316\u4e2d\u7684\uff0c\u5f53\u524d\u6d41\u8868\u6570\u636e\u5173\u8054\u5b8c\u7ef4\u8868\u6570\u636e\u540e\uff0c\u5982\u679c\u540c\u4e00\u4e2a key \u7684\u7ef4\u8868\u7684\u6570\u636e\u53d1\u751f\u4e86\u53d8\u5316\uff0c\u5df2\u5173\u8054\u5230\u7684\u7ef4\u8868\u7684\u7ed3\u679c\u6570\u636e<strong>\u4e0d\u4f1a<\/strong>\u518d\u540c\u6b65\u66f4\u65b0\u3002\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u7ef4\u8868\u4e2d user_id \u4e3a 1 \u7684\u6570\u636e\u5728 08\uff1a00 \u65f6 age \u7531 12-18 \u53d8\u4e3a\u4e86 18-24\uff0c\u90a3\u4e48\u5f53\u6211\u4eec\u7684\u4efb\u52a1\u5728 08\uff1a01 failover \u4e4b\u540e\u4ece 07\uff1a59 \u5f00\u59cb\u56de\u6eaf\u6570\u636e\u65f6\uff0c\u539f\u672c\u5e94\u8be5\u5173\u8054\u5230 12-18 \u7684\u6570\u636e\u4f1a\u5173\u8054\u5230 18-24 \u7684 age \u6570\u636e\u3002\u8fd9\u662f\u6709\u53ef\u80fd\u4f1a\u5f71\u54cd\u6570\u636e\u8d28\u91cf\u7684\u3002\u6240\u4ee5\u5c0f\u4f19\u4f34\u840c\u5728\u8bc4\u4f30\u4f60\u4eec\u7684\u5b9e\u65f6\u4efb\u52a1\u65f6\u8981\u8003\u8651\u5230\u8fd9\u4e00\u70b9\u3002<\/li>\n\n\n\n<li><strong>\u4f1a\u53d1\u751f\u5b9e\u65f6\u7684\u65b0\u5efa\u53ca\u66f4\u65b0\u7684\u7ef4\u8868\u535a\u4e3b\u5efa\u8bae\u5c0f\u4f19\u4f34\u840c\u5e94\u8be5\u5efa\u7acb\u8d77\u6570\u636e\u5ef6\u8fdf\u7684\u76d1\u63a7\u673a\u5236\uff0c\u9632\u6b62\u51fa\u73b0\u6d41\u8868\u6570\u636e\u5148\u4e8e\u7ef4\u8868\u6570\u636e\u5230\u8fbe\uff0c\u5bfc\u81f4\u5173\u8054\u4e0d\u5230\u7ef4\u8868\u6570\u636e<\/strong><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"44%E5%86%8D%E8%AF%B4%E8%AF%B4%E7%BB%B4%E8%A1%A8%E5%B8%B8%E8%A7%81%E7%9A%84%E6%80%A7%E8%83%BD%E9%97%AE%E9%A2%98%E5%8F%8A%E4%BC%98%E5%8C%96%E6%80%9D%E8%B7%AF\"><\/span>4.4.\u518d\u8bf4\u8bf4\u7ef4\u8868\u5e38\u89c1\u7684\u6027\u80fd\u95ee\u9898\u53ca\u4f18\u5316\u601d\u8def<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u6240\u6709\u7684\u7ef4\u8868\u6027\u80fd\u95ee\u9898\u90fd\u53ef\u4ee5\u603b\u7ed3\u4e3a\uff1a\u9ad8 qps \u4e0b\u8bbf\u95ee\u7ef4\u8868\u5b58\u50a8\u5f15\u64ce\u4ea7\u751f\u7684\u4efb\u52a1\u80cc\u538b\uff0c\u6570\u636e\u4ea7\u51fa\u5ef6\u8fdf\u95ee\u9898\u3002<\/p>\n\n\n\n<p>\u4e3e\u4e2a\u4f8b\u5b50\uff1a<\/p>\n\n\n\n<ul>\n<li><strong>\u5728\u6ca1\u6709\u4f7f\u7528\u7ef4\u8868\u7684\u60c5\u51b5\u4e0b<\/strong>\uff1a\u4e00\u6761\u6570\u636e\u4ece\u8f93\u5165 flink \u4efb\u52a1\u5230\u8f93\u51fa flink \u4efb\u52a1\u7684\u65f6\u5ef6\u5047\u5982\u4e3a&nbsp;<code>0.1 ms<\/code>\uff0c\u90a3\u4e48\u5e76\u884c\u5ea6\u4e3a&nbsp;<code>1<\/code>&nbsp;\u7684\u4efb\u52a1\u7684\u541e\u5410\u53ef\u4ee5\u8fbe\u5230&nbsp;<code>1 query \/ 0.1 ms = 1w qps<\/code>\u3002<\/li>\n\n\n\n<li><strong>\u5728\u4f7f\u7528\u7ef4\u8868\u4e4b\u540e<\/strong>\uff1a\u6bcf\u6761\u6570\u636e\u8bbf\u95ee\u7ef4\u8868\u7684\u5916\u90e8\u5b58\u50a8\u7684\u65f6\u957f\u4e3a&nbsp;<code>2 ms<\/code>\uff0c\u90a3\u4e48\u4e00\u6761\u6570\u636e\u4ece\u8f93\u5165 flink \u4efb\u52a1\u5230\u8f93\u51fa flink \u4efb\u52a1\u7684\u65f6\u5ef6\u5c31\u4f1a\u53d8\u6210&nbsp;<code>2.1 ms<\/code>\uff0c\u90a3\u4e48\u540c\u6837\u5e76\u884c\u5ea6\u4e3a&nbsp;<code>1<\/code>&nbsp;\u7684\u4efb\u52a1\u7684\u541e\u5410\u53ea\u80fd\u8fbe\u5230&nbsp;<code>1 query \/ 2.1 ms = 476 qps<\/code>\u3002\u4e24\u8005\u7684\u541e\u5410\u91cf\u76f8\u5dee&nbsp;<code>21 \u500d<\/code>\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u7ef4\u8868 join \u7684\u7b97\u5b50\u4f1a\u4ea7\u751f\u80cc\u538b\uff0c\u4efb\u52a1\u4ea7\u51fa\u4f1a\u5ef6\u8fdf\u3002<\/p>\n\n\n\n<p>\u90a3\u4e48\u5f53\u7136\uff0c\u89e3\u51b3\u65b9\u6848\u4e5f\u662f\u6709\u5f88\u591a\u7684\u3002\u629b\u5f00 flink sql \u60f3\u4e00\u4e0b\uff0c\u5982\u679c\u6211\u4eec\u4f7f\u7528 DataStream api\uff0c\u751a\u81f3\u662f\u5728\u505a\u4e00\u4e2a\u540e\u7aef\u5e94\u7528\uff0c\u9700\u8981\u8bbf\u95ee\u5916\u90e8\u5b58\u50a8\u65f6\uff0c\u5e38\u7528\u7684\u4f18\u5316\u65b9\u6848\u6709\u54ea\u4e9b\uff1f\u8fd9\u91cc\u5217\u4e3e\u4e00\u4e0b\uff1a<\/p>\n\n\n\n<ol>\n<li><strong>\u6309\u7167 redis \u7ef4\u8868\u7684 key \u5206\u6876 + local cache<\/strong>\uff1a\u901a\u8fc7\u6309\u7167 key \u5206\u6876\u7684\u65b9\u5f0f\uff0c\u8ba9\u5927\u591a\u6570\u636e\u7684\u7ef4\u8868\u5173\u8054\u7684\u6570\u636e\u8bbf\u95ee\u8d70\u4e4b\u524d\u8bbf\u95ee\u8fc7\u5f97 local cache \u5373\u53ef\u3002\u8fd9\u6837\u5c31\u53ef\u4ee5\u628a\u8bbf\u95ee\u5916\u90e8\u5b58\u50a8 2.1 ms \u5904\u7406\u4e00\u4e2a query \u53d8\u4e3a\u8bbf\u95ee\u5185\u5b58\u7684 0.1 ms \u5904\u7406\u4e00\u4e2a query \u7684\u65f6\u957f\u3002<\/li>\n\n\n\n<li><strong>\u5f02\u6b65\u8bbf\u95ee\u5916\u5b58<\/strong>\uff1aDataStream api \u6709\u5f02\u6b65\u7b97\u5b50\uff0c\u53ef\u4ee5\u5229\u7528\u7ebf\u7a0b\u6c60\u53bb\u540c\u65f6\u591a\u6b21\u8bf7\u6c42\u7ef4\u8868\u5916\u90e8\u5b58\u50a8\u3002\u8fd9\u6837\u5c31\u53ef\u4ee5\u628a 2.1 ms \u5904\u7406 1 \u4e2a query \u53d8\u4e3a 2.1 ms \u5904\u7406 10 \u4e2a query\u3002\u541e\u5410\u53ef\u53d8\u4f18\u5316\u5230&nbsp;<code>10 \/ 2.1 ms = 4761 qps<\/code>\u3002<\/li>\n\n\n\n<li><strong>\u6279\u91cf\u8bbf\u95ee\u5916\u5b58<\/strong>\uff1a\u9664\u4e86\u5f02\u6b65\u8bbf\u95ee\u4e4b\u5916\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u6279\u91cf\u8bbf\u95ee\u5916\u90e8\u5b58\u50a8\u3002\u4e3e\u4e00\u4e2a\u4f8b\u5b50\uff1a\u5728\u8bbf\u95ee redis \u7ef4\u8868\u7684 1 query \u5360\u7528 2.1 ms \u65f6\u957f\u4e2d\uff0c\u5176\u4e2d\u53ef\u80fd\u6709 2 ms \u90fd\u662f\u5728\u7f51\u7edc\u8bf7\u6c42\u4e0a\u9762\u7684\u8017\u65f6<br>\uff0c\u5176\u4e2d\u53ea\u6709 0.1 ms \u662f redis server \u5904\u7406\u8bf7\u6c42\u7684\u65f6\u957f\u3002\u90a3\u4e48\u6211\u4eec\u5c31\u53ef\u4ee5\u4f7f\u7528 redis \u63d0\u4f9b\u7684 pipeline \u80fd\u529b\uff0c\u5728\u5ba2\u6237\u7aef\uff08\u4e5f\u5c31\u662f flink \u4efb\u52a1 lookup join \u7b97\u5b50\u4e2d\uff09\uff0c\u6512\u4e00\u6279\u6570\u636e\uff0c\u4f7f\u7528 pipeline \u53bb\u540c\u65f6\u8bbf\u95ee redis sever\u3002\u8fd9\u6837\u5c31\u53ef\u4ee5\u628a 2.1 ms \u5904\u7406 1 \u4e2a query \u53d8\u4e3a 7ms\uff082ms + 50 * 0.1ms\uff09 \u5904\u7406 50 \u4e2a query\u3002\u541e\u5410\u53ef\u53d8\u4e3a&nbsp;<code>50 query \/ 7 ms = 7143 qps<\/code>\u3002\u535a\u4e3b\u8fd9\u91cc\u6d4b\u8bd5\u4e86\u4e0b\u4f7f\u7528 redis pipeline \u548c\u672a\u4f7f\u7528\u7684\u65f6\u957f\u6d88\u8017\u5bf9\u6bd4\u3002\u5982\u4e0b\u56fe\u6240\u793a\u3002<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic1.zhimg.com\/80\/v2-47a502ab146743cce5bbf8eea4009ff8_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>redis pipeline<\/p>\n\n\n\n<p>\u535a\u4e3b\u8ba4\u4e3a\u4e0a\u8ff0\u4f18\u5316\u6548\u679c\u4e2d\uff0c\u6700\u597d\u7528\u7684\u662f 1 + 3\uff0c2 \u76f8\u6bd4 3 \u8fd8\u662f\u4e00\u6761\u4e00\u6761\u53d1\u8bf7\u6c42\uff0c\u6027\u80fd\u4f1a\u5dee\u4e00\u4e9b\u3002<\/p>\n\n\n\n<p>\u65e2\u7136 DataStream \u53ef\u4ee5\u8fd9\u6837\u505a\uff0cflink sql \u5fc5\u987b\u5fc5\u7684\u4e5f\u53ef\u4ee5\u501f\u9274\u4e0a\u9762\u7684\u8fd9\u4e9b\u4f18\u5316\u65b9\u6848\u3002\u5177\u4f53\u600e\u4e48\u64cd\u4f5c\u5462\uff1f\u770b\u4e0b\u6587\u9a9a\u64cd\u4f5c<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"45lookup_join_%E7%9A%84%E5%85%B7%E4%BD%93%E6%80%A7%E8%83%BD%E4%BC%98%E5%8C%96%E6%96%B9%E6%A1%88\"><\/span>4.5.lookup join \u7684\u5177\u4f53\u6027\u80fd\u4f18\u5316\u65b9\u6848<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ol>\n<li><strong>\u6309\u7167 redis \u7ef4\u8868\u7684 key \u5206\u6876 + local cache<\/strong>\uff1asql \u4e2d\u5982\u679c\u8981\u505a\u5206\u6876\uff0c\u5f97\u5148\u505a group by\uff0c\u4f46\u662f\u5982\u679c\u505a\u4e86 group by \u7684\u805a\u5408\uff0c\u5c31\u53ea\u80fd\u5728 udaf \u4e2d\u505a\u8bbf\u95ee redis \u5904\u7406\uff0c\u5e76\u4e14 udaf \u4ea7\u51fa\u7684\u7ed3\u679c\u53ea\u80fd\u662f\u4e00\u6761\uff0c\u6240\u4ee5\u8fd9\u79cd\u5b9e\u73b0\u8d77\u6765\u975e\u5e38\u590d\u6742\u3002\u6211\u4eec\u9009\u62e9\u4e0d\u505a keyby \u5206\u6876\u3002\u4f46\u662f\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528 local cache \u53bb\u505a\u672c\u5730\u7f13\u5b58\uff0c\u867d\u7136\u3010\u76f4\u63a5\u7f13\u5b58\u3011\u7684\u6548\u679c\u6bd4\u3010\u5148\u6309\u7167 key \u5206\u6876\u518d\u505a\u7f13\u5b58\u3011\u7684\u6548\u679c\u5dee\uff0c\u4f46\u662f\u4e5f\u80fd\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u51cf\u5c11\u8bbf\u95ee redis \u538b\u529b\u3002\u5728\u535a\u4e3b\u5b9e\u73b0\u7684 redis connector \u4e2d\uff0c\u5185\u7f6e\u4e86 local cache \u7684\u5b9e\u73b0\uff0c\u5c0f\u4f19\u4f34\u840c\u53ef\u4ee5\u53c2\u8003\u4e0b\u9762\u8fd9\u90e8\u7bc7\u6587\u7ae0\u8fdb\u884c\u914d\u7f6e\u3002<\/li>\n\n\n\n<li><strong>\u5f02\u6b65\u8bbf\u95ee\u5916\u5b58<\/strong>\uff1a\u76ee\u524d\u535a\u4e3b\u5b9e\u73b0\u7684 redis connector \u4e0d\u652f\u6301\u5f02\u6b65\u8bbf\u95ee\uff0c\u4f46\u662f\u5b98\u65b9\u5b9e\u73b0\u7684 hbase connector \u652f\u6301\u8fd9\u4e2a\u529f\u80fd\uff0c\u53c2\u8003\u4e0b\u9762\u94fe\u63a5\u6587\u7ae0\u7684\uff0c\u70b9\u5f00\u4e4b\u540e\u641c\u7d22&nbsp;<code>lookup.async<\/code>\u3002<a href=\"https:\/\/link.zhihu.com\/?target=https%3A\/\/nightlies.apache.org\/flink\/flink-docs-release-1.13\/docs\/connectors\/table\/hbase\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/nightlies.apache.org\/flink\/flink-docs-release-1.13\/docs\/connectors\/table\/hbase\/<\/a><\/li>\n\n\n\n<li><strong>\u6279\u91cf\u8bbf\u95ee\u5916\u5b58<\/strong>\uff1a\u8fd9\u73a9\u610f\u5b98\u65b9\u5fc5\u7136\u6ca1\u6709\u5b9e\u73b0\u554a\uff0c\u4f46\u662f\uff0c\u4f46\u662f\uff0c\u4f46\u662f\uff0c\u7ecf\u8fc7\u535a\u4e3b\u5468\u672b\u4e24\u5929\u7684\u75af\u72c2 debug\uff0c\u6539\u4e86\u6539\u6e90\u7801\uff0c\u641e\u5b9a\u4e86\u57fa\u4e8e redis \u7684\u6279\u91cf\u8bbf\u95ee\u5916\u5b58\u4f18\u5316\u7684\u529f\u80fd\u3002<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"46%E5%9F%BA%E4%BA%8E_redis_connector_%E7%9A%84%E6%89%B9%E9%87%8F%E8%AE%BF%E9%97%AE%E6%9C%BA%E5%88%B6%E4%BC%98%E5%8C%96\"><\/span>4.6.\u57fa\u4e8e redis connector \u7684\u6279\u91cf\u8bbf\u95ee\u673a\u5236\u4f18\u5316<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u5148\u63cf\u8ff0\u4e00\u4e0b\u5927\u6982\u662f\u4e2a\u4ec0\u4e48\u4e1c\u897f\uff0c\u5177\u4f53\u600e\u4e48\u7528\u3002<\/p>\n\n\n\n<p>\u4f60\u53ea\u9700\u8981\u5728 StreamTableEnvironment \u4e2d\u7684 table config \u914d\u7f6e\u4e0a&nbsp;<code>is.dim.batch.mode<\/code>&nbsp;\u4e3a&nbsp;<code>true<\/code>\uff0csql \u4e0d\u7528\u505a\u4efb\u4f55\u6539\u52a8\u7684\u60c5\u51b5\u4e0b\uff0cflink lookup join \u7b97\u5b50\u4f1a\u81ea\u52a8\u4f18\u5316\uff0c\u4f18\u5316\u6548\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<p>lookup join \u7b97\u5b50\u7684\u6bcf\u4e2a task \u4e0a\uff0c<code>\u6bcf\u6512\u591f 30 \u6761\u6570\u636e<\/code>&nbsp;or&nbsp;<code>\u6bcf\u9694\u4e94\u79d2\uff08\u5904\u7406\u65f6\u95f4\uff09<\/code>&nbsp;\u53bb\u89e6\u53d1\u4e00\u6b21\u6279\u91cf\u8bbf\u95ee redis \u7684\u8bf7\u6c42\uff0c\u4f7f\u7528\u7684\u662f jedis client \u7684 pipeline \u529f\u80fd\u8bbf\u95ee redis server\u3002\u5b9e\u6d4b\u6027\u80fd\u6709\u5f88\u5927\u63d0\u5347\u3002<\/p>\n\n\n\n<p>\u5173\u4e8e\u8fd9\u4e2a\u6279\u91cf\u8bbf\u95ee\u673a\u5236\u7684\u4f18\u5316\u4ecb\u7ecd\u548c\u4f7f\u7528\u65b9\u5f0f\u4ecb\u7ecd\uff0c\u5c0f\u4f19\u4f34\u4eec\u5148\u522b\u6025\uff0c\u4e0b\u7bc7\u6587\u7ae0\u4f1a\u8be6\u7ec6\u4ecb\u7ecd\u5230\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5%E6%80%BB%E7%BB%93%E4%B8%8E%E5%B1%95%E6%9C%9B\"><\/span>5.\u603b\u7ed3\u4e0e\u5c55\u671b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u6e90\u7801\u516c\u4f17\u53f7\u540e\u53f0\u56de\u590d<strong>1.13.2 sql lookup join<\/strong>\u83b7\u53d6\u3002<\/p>\n\n\n\n<p>\u672c\u6587\u4e3b\u8981\u4ecb\u7ecd\u4e86 flink sql lookup join \u7684\u4f7f\u7528\u65b9\u5f0f\uff0c\u5e76\u4ecb\u7ecd\u4e86\u4e00\u4e9b\u7ecf\u5e38\u51fa\u73b0\u7684\u6027\u80fd\u95ee\u9898\u4ee5\u53ca\u4f18\u5316\u601d\u8def\uff0c\u603b\u7ed3\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ol>\n<li><strong>\u80cc\u666f\u53ca\u5e94\u7528\u573a\u666f\u4ecb\u7ecd<\/strong>\uff1a\u535a\u4e3b\u671f\u671b\u4f60\u80fd\u4e86\u89e3\u5230\uff0cflink sql \u63d0\u4f9b\u4e86\u8f7b\u677e\u8bbf\u95ee<strong>\u5916\u90e8\u5b58\u50a8<\/strong>\u7684 lookup join\uff08\u4e0e\u4e0a\u8282\u4e0d\u540c\uff0c\u4e0a\u8282\u8bf4\u7684\u662f\u6d41\u4e0e\u6d41\u7684 join\uff09\u3002lookup join \u53ef\u4ee5\u7b80\u5355\u7406\u89e3\u4e3a\u4f7f\u7528 flatmap \u8bbf\u95ee\u5916\u90e8\u5b58\u50a8\u6570\u636e\u7136\u540e\u5c06\u7ef4\u5ea6\u5b57\u6bb5\u62fc\u63a5\u5230\u5f53\u524d\u8fd9\u6761\u6570\u636e\u4e0a\u9762<\/li>\n\n\n\n<li><strong>\u6765\u4e00\u4e2a\u5b9e\u6218\u6848\u4f8b<\/strong>\uff1a\u535a\u4e3b\u4ee5\u66dd\u5149\u7528\u6237\u65e5\u5fd7\u6d41\u5173\u8054\u7528\u6237\u753b\u50cf\uff08\u5e74\u9f84\u3001\u6027\u522b\uff09\u7ef4\u8868\u4e3a\u4f8b\u4ecb\u7ecd lookup join \u5e94\u8be5\u8fbe\u5230\u7684\u5173\u8054\u7684\u9884\u671f\u6548\u679c\u3002<\/li>\n\n\n\n<li><strong>flink sql lookup join \u7684\u89e3\u51b3\u65b9\u6848\u4ee5\u53ca\u539f\u7406\u7684\u4ecb\u7ecd<\/strong>\uff1a\u4e3b\u8981\u4ecb\u7ecd lookup join \u7684\u5728\u4e0a\u8ff0\u5b9e\u6218\u6848\u4f8b\u7684 sql \u5199\u6cd5\uff0c\u535a\u4e3b\u671f\u671b\u4f60\u80fd\u4e86\u89e3\u5230\uff0clookup join \u662f\u57fa\u4e8e\u5904\u7406\u65f6\u95f4\u7684\uff0c\u5e76\u4e14 lookup join \u7ecf\u5e38\u4f1a\u7531\u4e8e\u8bbf\u95ee\u5916\u90e8\u5b58\u50a8\u7684 qps \u8fc7\u9ad8\u800c\u5bfc\u81f4\u80cc\u538b\uff0c\u4ea7\u51fa\u5ef6\u8fdf\u7b49\u6027\u80fd\u95ee\u9898\u3002\u6211\u4eec\u53ef\u4ee5\u501f\u9274\u5728 DataStream api \u4e2d\u7684\u7ef4\u8868 join \u4f18\u5316\u601d\u8def\u5728 flink sql \u4f7f\u7528&nbsp;<code>local cache<\/code>\uff0c<code>\u5f02\u6b65\u8bbf\u95ee\u7ef4\u8868<\/code>\uff0c<code>\u6279\u91cf\u8bbf\u95ee\u7ef4\u8868<\/code>\u4e09\u79cd\u65b9\u5f0f\u53bb\u89e3\u51b3\u6027\u80fd\u95ee\u9898\u3002<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>1.\u5e8f\u7bc7 \u6e90\u7801\u516c\u4f17\u53f7\u540e\u53f0\u56de\u590d1.13.2 sql lookup join\u83b7\u53d6\u3002 \u5e9f\u8bdd\u4e0d\u591a\u8bf4\uff0c\u54b1\u4eec\u5148\u76f4&hellip; <a href=\"http:\/\/viplao.com\/index.php\/2023\/03\/19\/%e3%80%90%e8%bf%90%e7%bb%b4%e5%b7%a5%e5%85%b7%e3%80%91flink-sql-%e5%ae%9e%e8%b7%b513-%e7%bb%b4%e8%a1%a8-join-%e7%9a%84%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e4%b9%8b%e8%b7%af%ef%bc%88%e4%b8%8a%ef%bc%89\/\" class=\"more-link read-more\" rel=\"bookmark\">\u7ee7\u7eed\u9605\u8bfb <span class=\"screen-reader-text\">\u3010\u8fd0\u7ef4\u5de5\u5177\u3011Flink SQL \u5b9e\u8df513 \u7ef4\u8868 join \u7684\u6027\u80fd\u4f18\u5316\u4e4b\u8def\uff08\u4e0a\uff09\u9644\u6e90\u7801<\/span><i class=\"fa fa-arrow-right\"><\/i><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[25],"views":1533,"_links":{"self":[{"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/posts\/1345"}],"collection":[{"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/comments?post=1345"}],"version-history":[{"count":1,"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/posts\/1345\/revisions"}],"predecessor-version":[{"id":1346,"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/posts\/1345\/revisions\/1346"}],"wp:attachment":[{"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/media?parent=1345"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/categories?post=1345"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/tags?post=1345"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}