{"id":1342,"date":"2023-03-19T22:18:32","date_gmt":"2023-03-19T14:18:32","guid":{"rendered":"http:\/\/viplao.com\/?p=1342"},"modified":"2023-03-19T22:22:59","modified_gmt":"2023-03-19T14:22:59","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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7","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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/","title":{"rendered":"\u3010\u8fd0\u7ef4\u5de5\u5177\u3011Flink SQL \u5b9e\u8df512 \u6d41 join\u00a0\u5e38\u7528\u6280\u5de7"},"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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/#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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/#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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/#3%E5%85%88%E6%9D%A5%E4%B8%80%E4%B8%AA%E5%AE%9E%E6%88%98%E6%A1%88%E4%BE%8B\" title=\"3.\u5148\u6765\u4e00\u4e2a\u5b9e\u6218\u6848\u4f8b\">3.\u5148\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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/#4flink_sql_join\" title=\"4.flink sql join\">4.flink sql 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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/#41flink_sql\" title=\"4.1.flink sql\">4.1.flink sql<\/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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/#42left_join\" title=\"4.2.left join\">4.2.left join<\/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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/#43inner_join\" title=\"4.3.inner join\">4.3.inner join<\/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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/#44right_join\" title=\"4.4.right join\">4.4.right join<\/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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/#45full_join\" title=\"4.5.full join\">4.5.full join<\/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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/#46regular_join_%E7%9A%84%E6%80%BB%E7%BB%93\" title=\"4.6.regular join \u7684\u603b\u7ed3\">4.6.regular join \u7684\u603b\u7ed3<\/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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/#47%E6%80%8E%E6%A0%B7%E6%89%8D%E8%83%BD%E8%A7%A3%E5%86%B3_retract_%E5%AF%BC%E8%87%B4%E6%95%B0%E6%8D%AE%E9%87%8D%E5%A4%8D%E4%B8%8B%E5%8F%91%E5%88%B0_kafka_%E8%BF%99%E4%B8%AA%E9%97%AE%E9%A2%98%E5%91%A2%EF%BC%9F\" title=\"4.7.\u600e\u6837\u624d\u80fd\u89e3\u51b3 retract \u5bfc\u81f4\u6570\u636e\u91cd\u590d\u4e0b\u53d1\u5230 kafka \u8fd9\u4e2a\u95ee\u9898\u5462\uff1f\">4.7.\u600e\u6837\u624d\u80fd\u89e3\u51b3 retract \u5bfc\u81f4\u6570\u636e\u91cd\u590d\u4e0b\u53d1\u5230 kafka \u8fd9\u4e2a\u95ee\u9898\u5462\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" 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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/#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><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" 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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/#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-2\" 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-14\" 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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/#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-15\" 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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/#4flink_sql_interval_join\" title=\"4.flink sql interval join\">4.flink sql interval join<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" 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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/#41interval_join_%E5%AE%9A%E4%B9%89\" title=\"4.1.interval join \u5b9a\u4e49\">4.1.interval join \u5b9a\u4e49<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" 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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/#42%E6%A1%88%E4%BE%8B%E8%A7%A3%E5%86%B3%E6%96%B9%E6%A1%88\" title=\"4.2.\u6848\u4f8b\u89e3\u51b3\u65b9\u6848\">4.2.\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-18\" 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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/#43TimeIntervalJoin_%E7%AE%80%E7%89%88%E8%AF%B4%E6%98%8E\" title=\"4.3.TimeIntervalJoin \u7b80\u7248\u8bf4\u660e\">4.3.TimeIntervalJoin \u7b80\u7248\u8bf4\u660e<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" 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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/#44TimeIntervalJoin_%E8%AF%A6%E7%BB%86%E5%AE%9E%E7%8E%B0%E8%AF%B4%E6%98%8E\" title=\"4.4.TimeIntervalJoin \u8be6\u7ec6\u5b9e\u73b0\u8bf4\u660e\">4.4.TimeIntervalJoin \u8be6\u7ec6\u5b9e\u73b0\u8bf4\u660e<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" 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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/#45%E4%BD%BF%E7%94%A8%E6%B3%A8%E6%84%8F%E4%BA%8B%E9%A1%B9\" title=\"4.5.\u4f7f\u7528\u6ce8\u610f\u4e8b\u9879\">4.5.\u4f7f\u7528\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-21\" 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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/#5%E6%80%BB%E7%BB%93%E4%B8%8E%E5%B1%95%E6%9C%9B-2\" 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><em><strong>\u770b\u4e86\u90a3\u4e48\u591a\u7684\u6280\u672f\u6587\uff0c\u4f60\u80fd\u660e\u767d\u4f5c\u8005\u60f3\u8ba9\u4f60\u5728\u8bfb\u5b8c\u6587\u7ae0\u540e\u5b66\u5230\u4ec0\u4e48\u5417\uff1f<\/strong><\/em><\/p>\n\n\n\n<p><em><strong>\u5927\u6570\u636e\u7f8a\u8bf4\u7684\u6587\u7ae0\u4f1a\u8ba9\u4f60\u660e\u767d<\/strong><\/em><\/p>\n\n\n\n<p><em><strong>1. \u535a\u4e3b\u4f1a\u9610\u660e\u535a\u4e3b\u671f\u671b\u672c\u6587\u80fd\u7ed9\u5c0f\u4f19\u4f34\u4eec\u5e26\u6765\u4ec0\u4e48\u5e2e\u52a9\uff0c\u8ba9\u5c0f\u4f19\u4f34\u840c\u80fd\u76f4\u89c2\u660e\u767d\u535a\u4e3b\u7684\u5fc3\u601d<\/strong><\/em><\/p>\n\n\n\n<p><em><strong>2. \u535a\u4e3b\u4f1a\u4ee5\u5b9e\u9645\u7684\u5e94\u7528\u573a\u666f\u548c\u6848\u4f8b\u5165\u624b\uff0c\u4e0d\u53ea\u662f\u77e5\u8bc6\u70b9\u7684\u7b80\u5355\u5806\u780c<\/strong><\/em><\/p>\n\n\n\n<p><em><strong>3. \u535a\u4e3b\u4f1a\u628a\u91cd\u8981\u7684\u77e5\u8bc6\u70b9\u7684\u539f\u7406\u8fdb\u884c\u5256\u6790\uff0c\u8ba9\u5c0f\u4f19\u4f34\u840c\u505a\u5230\u6df1\u5165\u6d45\u51fa<\/strong><\/em><\/p>\n\n\n\n<p>\u8fdb\u5165\u6b63\u6587\u3002<\/p>\n\n\n\n<p>\u6e90\u7801\u516c\u4f17\u53f7\u540e\u53f0\u56de\u590d<strong>1.13.2 sql join \u7684\u5947\u5999\u89e3\u6790\u4e4b\u8def<\/strong>\u83b7\u53d6\u3002<\/p>\n\n\n\n<p>\u4e0b\u9762\u5373\u662f\u6587\u7ae0\u76ee\u5f55\uff0c\u4e5f\u5bf9\u5e94\u5230\u672c\u6587\u7684\u7ed3\u8bba\uff0c\u5c0f\u4f19\u4f34\u53ef\u4ee5\u5148\u770b\u7ed3\u8bba\u5feb\u901f\u4e86\u89e3\u672c\u6587\u80fd\u7ed9\u4f60\u5e26\u6765\u4ec0\u4e48\u5e2e\u52a9\uff1a<\/p>\n\n\n\n<ol>\n<li>\u80cc\u666f\u53ca\u5e94\u7528\u573a\u666f\u4ecb\u7ecd\uff1ajoin \u4f5c\u4e3a\u79bb\u7ebf\u6570\u4ed3\u4e2d\u6700\u5e38\u89c1\u7684\u573a\u666f\uff0c\u5728\u5b9e\u65f6\u6570\u4ed3\u4e2d\u4e5f\u5fc5\u7136\u4e0d\u53ef\u80fd\u7f3a\u5c11\u5b83\uff0cflink sql \u63d0\u4f9b\u7684\u4e30\u5bcc\u7684 join \u65b9\u5f0f\uff08\u603b\u7ed3 6 \u79cd\uff1aregular join\uff0c\u7ef4\u8868 join\uff0ctemporal join\uff0cinterval join\uff0carray \u62cd\u5e73\uff0ctable function \u51fd\u6570\uff09\u5bf9\u6211\u4eec\u6ee1\u8db3\u9700\u6c42\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u540e\u76fe<\/li>\n\n\n\n<li>\u5148\u6765\u4e00\u4e2a\u5b9e\u6218\u6848\u4f8b\uff1a\u4ee5\u4e00\u4e2a\u66dd\u5149\u65e5\u5fd7 left join \u70b9\u51fb\u65e5\u5fd7\u4e3a\u6848\u4f8b\u5c55\u5f00\uff0c\u4ecb\u7ecd flink sql join \u7684\u89e3\u51b3\u65b9\u6848<\/li>\n\n\n\n<li>flink sql join \u7684\u89e3\u51b3\u65b9\u6848\u4ee5\u53ca\u5b58\u5728\u95ee\u9898\u7684\u4ecb\u7ecd\uff1a\u4e3b\u8981\u4ecb\u7ecd regular join \u7684\u5728\u4e0a\u8ff0\u6848\u4f8b\u7684\u8fd0\u884c\u7ed3\u679c\u53ca\u5206\u6790\u6e90\u7801\u673a\u5236\uff0c\u5b83\u867d\u7136\u7b80\u5355\uff0c\u4f46\u662f left join\uff0cright join\uff0cfull join \u4f1a\u5b58\u5728\u7740 retract \u7684\u95ee\u9898\uff0c\u6240\u4ee5\u5728\u4f7f\u7528\u524d\uff0c\u4f60\u5e94\u8be5\u5145\u5206\u4e86\u89e3\u5176\u8fd0\u884c\u673a\u5236\uff0c\u907f\u514d\u51fa\u73b0\u6570\u636e\u53d1\u91cd\uff0c\u53d1\u591a\u7684\u95ee\u9898\u3002<\/li>\n\n\n\n<li>\u672c\u6587\u4e3b\u8981\u4ecb\u7ecd regular join retract \u7684\u95ee\u9898\uff0c\u4e0b\u8282\u4ecb\u7ecd\u600e\u4e48\u4f7f\u7528 interval join \u6765\u907f\u514d\u8fd9\u79cd retract \u95ee\u9898\uff0c\u5e76\u6ee1\u8db3\u7b2c 2 \u70b9\u7684\u5b9e\u6218\u6848\u4f8b\u9700\u6c42\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>\u5728\u6211\u4eec\u7684\u65e5\u5e38\u573a\u666f\u4e2d\uff0c\u5e94\u7528\u6700\u5e7f\u7684\u4e00\u79cd\u64cd\u4f5c\u5fc5\u7136\u6709 join \u7684\u4e00\u5e2d\u4e4b\u5730\uff0c\u4f8b\u5982<\/p>\n\n\n\n<ol>\n<li>\u8ba1\u7b97\u66dd\u5149\u6570\u636e\u548c\u70b9\u51fb\u6570\u636e\u7684 CTR\uff0c\u9700\u8981\u901a\u8fc7\u552f\u4e00 id \u8fdb\u884c join \u5173\u8054<\/li>\n\n\n\n<li>\u4e8b\u5b9e\u6570\u636e\u5173\u8054\u7ef4\u5ea6\u6570\u636e\u83b7\u53d6\u7ef4\u5ea6\uff0c\u8fdb\u800c\u8ba1\u7b97\u7ef4\u5ea6\u6307\u6807<\/li>\n<\/ol>\n\n\n\n<p>\u4e0a\u8ff0\u573a\u666f\uff0c\u5728\u79bb\u7ebf\u6570\u4ed3\u5e94\u7528\u4e4b\u5e7f\u5c31\u4e0d\u591a\u8bf4\u4e86\u3002<\/p>\n\n\n\n<p>\u90a3\u4e48\uff0c\u5b9e\u65f6\u6d41\u4e4b\u95f4\u7684\u5173\u8054\u8981\u600e\u4e48\u64cd\u4f5c\u5462\uff1f<\/p>\n\n\n\n<p>flink sql \u4e3a\u6211\u4eec\u63d0\u4f9b\u4e86\u56db\u79cd\u5f3a\u5927\u7684\u5173\u8054\u65b9\u5f0f\uff0c\u5e2e\u52a9\u6211\u4eec\u5728\u6d41\u5f0f\u573a\u666f\u4e2d\u8fbe\u5230\u6d41\u5173\u8054\u7684\u76ee\u7684\u3002\u5982\u4e0b\u56fe\u5b98\u7f51\u622a\u56fe\u6240\u793a\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic3.zhimg.com\/80\/v2-a52fa2e5a63a463ee272a4f2aa546aaa_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>join<\/p>\n\n\n\n<ol>\n<li>regular join\uff1a\u5373 left join\uff0cright join\uff0cfull join\uff0cinner join<\/li>\n\n\n\n<li>\u7ef4\u8868 lookup join\uff1a\u7ef4\u8868\u5173\u8054<\/li>\n\n\n\n<li>temporal join\uff1a\u5feb\u7167\u8868 join<\/li>\n\n\n\n<li>interval join\uff1a\u4e24\u6761\u6d41\u5728\u4e00\u6bb5\u65f6\u95f4\u533a\u95f4\u4e4b\u5185\u7684 join<\/li>\n\n\n\n<li>array \u70b8\u5f00\uff1a\u5217\u8f6c\u884c<\/li>\n\n\n\n<li>table function join\uff1a\u901a\u8fc7 table function \u81ea\u5b9a\u4e49\u51fd\u6570\u5b9e\u73b0 join\uff08\u7c7b\u4f3c\u4e8e\u5217\u8f6c\u884c\u7684\u6548\u679c\uff0c\u6216\u8005\u8bf4\u7c7b\u4f3c\u4e8e\u7ef4\u8868 join \u7684\u6548\u679c\uff09<\/li>\n<\/ol>\n\n\n\n<p>\u5728\u5b9e\u65f6\u6570\u4ed3\u4e2d\uff0cregular join \u4ee5\u53ca interval join\uff0c\u4ee5\u53ca\u4e24\u79cd join \u7684\u7ed3\u5408\u4f7f\u7528\u662f\u6700\u5e38\u4f7f\u7528\u7684\u3002\u6240\u4ee5\u672c\u6587\u4e3b\u8981\u4ecb\u7ecd\u8fd9\u4e24\u79cd\uff08\u592a\u957f\u7684\u7bc7\u5e45\u5927\u5bb6\u53ef\u80fd\u4e5f\u4e0d\u60f3\u770b\uff0c\u6240\u4ee5\u4e4b\u540e\u7684\u6587\u7ae0\u5c31\u4ee5\u7b80\u6d01\uff0c\u77ed\u4e3a\u76ee\u6807\uff09\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3%E5%85%88%E6%9D%A5%E4%B8%80%E4%B8%AA%E5%AE%9E%E6%88%98%E6%A1%88%E4%BE%8B\"><\/span>3.\u5148\u6765\u4e00\u4e2a\u5b9e\u6218\u6848\u4f8b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u5148\u6765\u4e00\u4e2a\u5b9e\u9645\u6848\u4f8b\u6765\u770b\u770b\u5728\u5177\u4f53\u8f93\u5165\u503c\u7684\u573a\u666f\u4e0b\uff0c\u8f93\u51fa\u503c\u5e94\u8be5\u957f\u5565\u6837\u3002<\/p>\n\n\n\n<p>\u573a\u666f\uff1a\u5373\u5e38\u89c1\u7684\u66dd\u5149\u65e5\u5fd7\u6d41\uff08show_log\uff09\u901a\u8fc7 log_id \u5173\u8054\u70b9\u51fb\u65e5\u5fd7\u6d41\uff08click_log\uff09\uff0c\u5c06\u6570\u636e\u7684\u5173\u8054\u7ed3\u679c\u8fdb\u884c\u4e0b\u53d1\u3002<\/p>\n\n\n\n<p>\u6765\u4e00\u6ce2\u8f93\u5165\u6570\u636e\uff1a<\/p>\n\n\n\n<p>\u66dd\u5149\u6570\u636e\uff1a<\/p>\n\n\n\n<p>\u70b9\u51fb\u6570\u636e\uff1a<\/p>\n\n\n\n<p>\u9884\u671f\u8f93\u51fa\u6570\u636e\u5982\u4e0b\uff1a<\/p>\n\n\n\n<p>\u719f\u6089\u79bb\u7ebf hive sql \u7684\u540c\u5b66\u53ef\u80fd 10s \u5c31\u5199\u5b8c\u4e0a\u9762\u8fd9\u4e2a sql \u4e86\uff0c\u5982\u4e0b hive sql<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>INSERT INTO sink_table\nSELECT\n    show_log.log_id as log_id,\n    show_log.timestamp as timestamp,\n    show_log.show_params as show_params,\n    click_log.click_params as click_params\nFROM show_log\nLEFT JOIN click_log ON show_log.log_id = click_log.log_id;\n<\/code><\/pre>\n\n\n\n<p>\u90a3\u4e48\u6211\u4eec\u770b\u770b\u4e0a\u8ff0\u9700\u6c42\u5982\u679c\u8981\u4ee5 flink sql \u5b9e\u73b0\u9700\u8981\u600e\u4e48\u505a\u5462\uff1f<\/p>\n\n\n\n<p>\u867d\u7136\u4e0d flink sql \u63d0\u4f9b\u4e86 left join \u7684\u80fd\u529b\uff0c\u4f46\u662f\u5728\u5b9e\u9645\u4f7f\u7528\u65f6\uff0c\u53ef\u80fd\u4f1a\u51fa\u73b0\u9884\u671f\u4e4b\u5916\u7684\u95ee\u9898\u3002\u4e0b\u8282\u8be6\u8ff0\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4flink_sql_join\"><\/span>4.flink sql join<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"41flink_sql\"><\/span>4.1.flink sql<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u8fd8\u662f\u4e0a\u9762\u7684\u6848\u4f8b\uff0c\u6211\u4eec\u5148\u5b9e\u9645\u8dd1\u4e00\u904d\u770b\u770b\u7ed3\u679c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>INSERT INTO sink_table\nSELECT\n    show_log.log_id as log_id,\n    show_log.timestamp as timestamp,\n    show_log.show_params as show_params,\n    click_log.click_params as click_params\nFROM show_log\nLEFT JOIN click_log ON show_log.log_id = click_log.log_id;\n<\/code><\/pre>\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:\/\/pic1.zhimg.com\/80\/v2-66f5302080ea89bfcee4f5475a95f6a8_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>flink web ui<\/p>\n\n\n\n<p>\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>+&#91;1 | 2021-11-01 00:01:03 | show_params | null]\n-&#91;1 | 2021-11-01 00:01:03 | show_params | null]\n+&#91;1 | 2021-11-01 00:01:03 | show_params | click_params]\n+&#91;2 | 2021-11-01 00:03:00 | show_params | click_params]\n+&#91;3 | 2021-11-01 00:05:00 | show_params | null]\n<\/code><\/pre>\n\n\n\n<p>\u4ece\u7ed3\u679c\u4e0a\u770b\uff0c\u5176\u8f93\u51fa\u6570\u636e\u6709&nbsp;<code>+<\/code>\uff0c<code>-<\/code>\uff0c\u4ee3\u8868\u5176\u8f93\u51fa\u7684\u6570\u636e\u662f\u4e00\u4e2a retract \u6d41\u7684\u6570\u636e\u3002\u5206\u6790\u539f\u56e0\u53d1\u73b0\u662f\uff0c\u7531\u4e8e\u7b2c\u4e00\u6761 show_log \u5148\u4e8e click_log \u5230\u8fbe\uff0c<br>\u6240\u4ee5\u5c31\u5148\u76f4\u63a5\u53d1\u51fa&nbsp;<code>+[1 | 2021-11-01 00:01:03 | show_params | null]<\/code>\uff0c\u540e\u9762 click_log \u5230\u8fbe\u4e4b\u540e\uff0c\u5c06\u4e0a\u4e00\u6b21\u672a\u5173\u8054\u5230\u7684 show_log \u64a4\u56de\uff0c<br>\u7136\u540e\u5c06\u5173\u8054\u5230\u7684&nbsp;<code>+[1 | 2021-11-01 00:01:03 | show_params | click_params]<\/code>&nbsp;\u4e0b\u53d1\u3002<\/p>\n\n\n\n<p>\u4f46\u662f retract \u6d41\u4f1a\u5bfc\u81f4\u5199\u5165\u5230 kafka \u7684\u6570\u636e\u53d8\u591a\uff0c\u8fd9\u662f\u4e0d\u53ef\u88ab\u63a5\u53d7\u7684\u3002\u6211\u4eec\u671f\u671b\u7684\u7ed3\u679c\u5e94\u8be5\u662f\u4e00\u4e2a append \u6570\u636e\u6d41\u3002<\/p>\n\n\n\n<p>\u4e3a\u4ec0\u4e48 left join \u4f1a\u51fa\u73b0\u8fd9\u79cd\u95ee\u9898\u5462\uff1f\u90a3\u5c31\u8981\u4ece left join \u7684\u539f\u7406\u8bf4\u8d77\u4e86\u3002<\/p>\n\n\n\n<p>\u6765\u5b9a\u4f4d\u5230\u5177\u4f53\u7684\u5b9e\u73b0\u6e90\u7801\u3002\u5148\u770b\u4e00\u4e0b transformations\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic3.zhimg.com\/80\/v2-630c36391a1d4fbd983b96b6dfd156fa_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>transformations<\/p>\n\n\n\n<p>\u53ef\u4ee5\u770b\u5230 left join \u7684\u5177\u4f53 operator \u662f&nbsp;<code>org.apache.flink.table.runtime.operators.join.stream.StreamingJoinOperator<\/code>\u3002<\/p>\n\n\n\n<p>\u5176\u6838\u5fc3\u903b\u8f91\u5c31\u96c6\u4e2d\u5728&nbsp;<code>processElement<\/code>&nbsp;\u65b9\u6cd5\u4e0a\u9762\u3002\u5e76\u4e14\u6e90\u7801\u5bf9\u4e8e&nbsp;<code>processElement<\/code>&nbsp;\u7684\u5904\u7406\u903b\u8f91\u6709\u8be6\u7ec6\u7684\u6ce8\u91ca\u8bf4\u660e\uff0c\u5982\u4e0b\u56fe\u6240\u793a\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic4.zhimg.com\/80\/v2-c53b77fa8254ae25d3fd5cd1cbf8a75b_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>StreamingJoinOperator#processElement<\/p>\n\n\n\n<p>\u6ce8\u91ca\u770b\u8d77\u6765\u903b\u8f91\u6bd4\u8f83\u590d\u6742\u3002\u6211\u4eec\u8fd9\u91cc\u6309\u7167 left join\uff0cinner join\uff0cright join\uff0cfull join \u5206\u7c7b\u7ed9\u5927\u5bb6\u89e3\u91ca\u4e00\u4e0b\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"42left_join\"><\/span>4.2.left join<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u9996\u5148\u662f left join\uff0c\u4ee5\u4e0a\u9762\u7684 show_log\uff08\u5de6\u8868\uff09 left join click_log\uff08\u53f3\u8868\uff09 \u4e3a\u4f8b\uff1a<\/p>\n\n\n\n<ol>\n<li>\u9996\u5148\u5982\u679c join xxx on \u4e2d\u7684\u6761\u4ef6\u662f\u7b49\u5f0f\u5219\u4ee3\u8868 join \u662f\u5728\u76f8\u540c key \u4e0b\u8fdb\u884c\u7684\uff0cjoin \u7684 key \u5373 show_log.log_id\uff0cclick_log.log_id\uff0c\u76f8\u540c key \u7684\u6570\u636e\u4f1a\u88ab\u53d1\u9001\u5230\u4e00\u4e2a\u5e76\u53d1\u4e2d\u8fdb\u884c\u5904\u7406\u3002\u5982\u679c join xxx on \u4e2d\u7684\u6761\u4ef6\u662f\u4e0d\u7b49\u5f0f\uff0c\u5219\u4e24\u4e2a\u6d41\u7684 source \u7b97\u5b50\u5411 join \u7b97\u5b50\u4e0b\u53d1\u6570\u636e\u662f\u6309\u7167 global \u7684 partition \u7b56\u7565\u8fdb\u884c\u4e0b\u53d1\u7684\uff0c\u5e76\u4e14 join \u7b97\u5b50\u5e76\u53d1\u4f1a\u88ab\u8bbe\u7f6e\u4e3a 1\uff0c\u6240\u6709\u7684\u6570\u636e\u4f1a\u88ab\u53d1\u9001\u5230\u8fd9\u4e00\u4e2a\u5e76\u53d1\u4e2d\u5904\u7406\u3002<\/li>\n\n\n\n<li>\u76f8\u540c key \u4e0b\uff0c\u5f53 show_log \u6765\u4e00\u6761\u6570\u636e\uff0c\u5982\u679c click_log \u6709\u6570\u636e\uff1a\u5219 show_log \u4e0e click_log \u4e2d\u7684\u6240\u6709\u6570\u636e\u8fdb\u884c\u904d\u5386\u5173\u8054\u4e00\u904d\u8f93\u51fa[+\uff08show_log\uff0cclick_log\uff09]\u6570\u636e\uff0c\u5e76\u4e14\u628a show_log \u4fdd\u5b58\u5230\u5de6\u8868\u7684\u72b6\u6001\u4e2d\uff08\u4ee5\u4f9b\u540e\u7eed join \u4f7f\u7528\uff09\u3002<\/li>\n\n\n\n<li>\u76f8\u540c key \u4e0b\uff0c\u5f53 show_log \u6765\u4e00\u6761\u6570\u636e\uff0c\u5982\u679c click_log \u4e2d\u6ca1\u6709\u6570\u636e\uff1a\u5219 show_log \u4e0d\u4f1a\u7b49\u5f85\uff0c\u76f4\u63a5\u8f93\u51fa[+\uff08show_log\uff0cnull\uff09]\u6570\u636e\uff0c\u5e76\u4e14\u628a show_log \u4fdd\u5b58\u5230\u5de6\u8868\u7684\u72b6\u6001\u4e2d\uff08\u4ee5\u4f9b\u540e\u7eed join \u4f7f\u7528\uff09\u3002<\/li>\n\n\n\n<li>\u76f8\u540c key \u4e0b\uff0c\u5f53 click_log \u6765\u4e00\u6761\u6570\u636e\uff0c\u5982\u679c show_log \u6709\u6570\u636e\uff1a\u5219 click_log \u5bf9 show_log \u4e2d\u6240\u6709\u7684\u6570\u636e\u8fdb\u884c\u904d\u5386\u5173\u8054\u4e00\u904d\u3002\u5728\u8f93\u51fa\u6570\u636e\u524d\uff0c\u4f1a\u5224\u65ad\uff0c\u5982\u679c\u88ab\u5173\u8054\u7684\u8fd9\u6761 show_log \u4e4b\u524d\u6ca1\u6709\u5173\u8054\u5230\u8fc7 click_log\uff08\u5373\u5f80\u4e0b\u53d1\u8fc7[+\uff08show_log\uff0cnull\uff09]\uff09\uff0c\u5219\u5148\u53d1\u4e00\u6761[-\uff08show_log\uff0cnull\uff09]\uff0c\u540e\u53d1\u4e00\u6761[+\uff08show_log\uff0cclick_log\uff09]<br>\uff0c\u4ee3\u8868\u628a\u4e4b\u524d\u7684\u90a3\u6761\u6ca1\u6709\u5173\u8054\u5230 click_log \u6570\u636e\u7684 show_log \u4e2d\u95f4\u7ed3\u679c\u7ed9\u64a4\u56de\uff0c\u628a\u5f53\u524d\u5173\u8054\u5230\u7684\u6700\u65b0\u7ed3\u679c\u8fdb\u884c\u4e0b\u53d1\uff0c\u5e76\u628a click_log \u4fdd\u5b58\u5230\u53f3\u8868\u7684\u72b6\u6001\u4e2d\uff08\u4ee5\u4f9b\u540e\u7eed\u5de6\u8868\u8fdb\u884c\u5173\u8054\uff09\u3002\u8fd9\u4e5f\u5c31\u89e3\u91ca\u4e86\u4e3a\u4ec0\u4e48\u8f93\u51fa\u6d41\u662f\u4e00\u4e2a retract \u6d41\u3002<\/li>\n\n\n\n<li>\u76f8\u540c key \u4e0b\uff0c\u5f53 click_log \u6765\u4e00\u6761\u6570\u636e\uff0c\u5982\u679c show_log \u6ca1\u6709\u6570\u636e\uff1a\u628a click_log \u4fdd\u5b58\u5230\u53f3\u8868\u7684\u72b6\u6001\u4e2d\uff08\u4ee5\u4f9b\u540e\u7eed\u5de6\u8868\u8fdb\u884c\u5173\u8054\uff09\u3002<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"43inner_join\"><\/span>4.3.inner join<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u4ee5\u4e0a\u9762\u7684 show_log\uff08\u5de6\u8868\uff09 inner join click_log\uff08\u53f3\u8868\uff09 \u4e3a\u4f8b\uff1a<\/p>\n\n\n\n<ol>\n<li>\u9996\u5148\u5982\u679c join xxx on \u4e2d\u7684\u6761\u4ef6\u662f\u7b49\u5f0f\u5219\u4ee3\u8868 join \u662f\u5728\u76f8\u540c key \u4e0b\u8fdb\u884c\u7684\uff0cjoin \u7684 key \u5373 show_log.log_id\uff0cclick_log.log_id\uff0c\u76f8\u540c key \u7684\u6570\u636e\u4f1a\u88ab\u53d1\u9001\u5230\u4e00\u4e2a\u5e76\u53d1\u4e2d\u8fdb\u884c\u5904\u7406\u3002\u5982\u679c join xxx on \u4e2d\u7684\u6761\u4ef6\u662f\u4e0d\u7b49\u5f0f\uff0c\u5219\u4e24\u4e2a\u6d41\u7684 source \u7b97\u5b50\u5411 join \u7b97\u5b50\u4e0b\u53d1\u6570\u636e\u662f\u6309\u7167 global \u7684 partition \u7b56\u7565\u8fdb\u884c\u4e0b\u53d1\u7684\uff0c\u5e76\u4e14 join \u7b97\u5b50\u5e76\u53d1\u4f1a\u88ab\u8bbe\u7f6e\u4e3a 1\uff0c\u6240\u6709\u7684\u6570\u636e\u4f1a\u88ab\u53d1\u9001\u5230\u8fd9\u4e00\u4e2a\u5e76\u53d1\u4e2d\u5904\u7406\u3002<\/li>\n\n\n\n<li>\u76f8\u540c key \u4e0b\uff0c\u5f53 show_log \u6765\u4e00\u6761\u6570\u636e\uff0c\u5982\u679c click_log \u6709\u6570\u636e\uff1a\u5219 show_log \u4e0e click_log \u4e2d\u7684\u6240\u6709\u6570\u636e\u8fdb\u884c\u904d\u5386\u5173\u8054\u4e00\u904d\u8f93\u51fa[+\uff08show_log\uff0cclick_log\uff09]\u6570\u636e\uff0c\u5e76\u4e14\u628a show_log \u4fdd\u5b58\u5230\u5de6\u8868\u7684\u72b6\u6001\u4e2d\uff08\u4ee5\u4f9b\u540e\u7eed join \u4f7f\u7528\uff09\u3002<\/li>\n\n\n\n<li>\u76f8\u540c key \u4e0b\uff0c\u5f53 show_log \u6765\u4e00\u6761\u6570\u636e\uff0c\u5982\u679c click_log \u4e2d\u6ca1\u6709\u6570\u636e\uff1a\u5219 show_log \u4e0d\u4f1a\u8f93\u51fa\u6570\u636e\uff0c\u4f1a\u628a show_log \u4fdd\u5b58\u5230\u5de6\u8868\u7684\u72b6\u6001\u4e2d\uff08\u4ee5\u4f9b\u540e\u7eed join \u4f7f\u7528\uff09\u3002<\/li>\n\n\n\n<li>\u76f8\u540c key \u4e0b\uff0c\u5f53 click_log \u6765\u4e00\u6761\u6570\u636e\uff0c\u5982\u679c show_log \u6709\u6570\u636e\uff1a\u5219 click_log \u4e0e show_log \u4e2d\u7684\u6240\u6709\u6570\u636e\u8fdb\u884c\u904d\u5386\u5173\u8054\u4e00\u904d\u8f93\u51fa[+\uff08show_log\uff0cclick_log\uff09]\u6570\u636e\uff0c\u5e76\u4e14\u628a click_log \u4fdd\u5b58\u5230\u53f3\u8868\u7684\u72b6\u6001\u4e2d\uff08\u4ee5\u4f9b\u540e\u7eed join \u4f7f\u7528\uff09\u3002<\/li>\n\n\n\n<li>\u76f8\u540c key \u4e0b\uff0c\u5f53 click_log \u6765\u4e00\u6761\u6570\u636e\uff0c\u5982\u679c show_log \u6ca1\u6709\u6570\u636e\uff1a\u5219 click_log \u4e0d\u4f1a\u8f93\u51fa\u6570\u636e\uff0c\u4f1a\u628a click_log \u4fdd\u5b58\u5230\u53f3\u8868\u7684\u72b6\u6001\u4e2d\uff08\u4ee5\u4f9b\u540e\u7eed join \u4f7f\u7528\uff09\u3002<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"44right_join\"><\/span>4.4.right join<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>right join \u548c left join \u4e00\u6837\uff0c\u53ea\u4e0d\u8fc7\u987a\u5e8f\u53cd\u4e86\uff0c\u8fd9\u91cc\u4e0d\u518d\u8d58\u8ff0\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"45full_join\"><\/span>4.5.full join<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u4ee5\u4e0a\u9762\u7684 show_log\uff08\u5de6\u8868\uff09 full join click_log\uff08\u53f3\u8868\uff09 \u4e3a\u4f8b\uff1a<\/p>\n\n\n\n<ol>\n<li>\u9996\u5148\u5982\u679c join xxx on \u4e2d\u7684\u6761\u4ef6\u662f\u7b49\u5f0f\u5219\u4ee3\u8868 join \u662f\u5728\u76f8\u540c key \u4e0b\u8fdb\u884c\u7684\uff0cjoin \u7684 key \u5373 show_log.log_id\uff0cclick_log.log_id\uff0c\u76f8\u540c key \u7684\u6570\u636e\u4f1a\u88ab\u53d1\u9001\u5230\u4e00\u4e2a\u5e76\u53d1\u4e2d\u8fdb\u884c\u5904\u7406\u3002\u5982\u679c join xxx on \u4e2d\u7684\u6761\u4ef6\u662f\u4e0d\u7b49\u5f0f\uff0c\u5219\u4e24\u4e2a\u6d41\u7684 source \u7b97\u5b50\u5411 join \u7b97\u5b50\u4e0b\u53d1\u6570\u636e\u662f\u6309\u7167 global \u7684 partition \u7b56\u7565\u8fdb\u884c\u4e0b\u53d1\u7684\uff0c\u5e76\u4e14 join \u7b97\u5b50\u5e76\u53d1\u4f1a\u88ab\u8bbe\u7f6e\u4e3a 1\uff0c\u6240\u6709\u7684\u6570\u636e\u4f1a\u88ab\u53d1\u9001\u5230\u8fd9\u4e00\u4e2a\u5e76\u53d1\u4e2d\u5904\u7406\u3002<\/li>\n\n\n\n<li>\u76f8\u540c key \u4e0b\uff0c\u5f53 show_log \u6765\u4e00\u6761\u6570\u636e\uff0c\u5982\u679c click_log \u6709\u6570\u636e\uff1a\u5219 show_log \u5bf9 click_log \u4e2d\u6240\u6709\u7684\u6570\u636e\u8fdb\u884c\u904d\u5386\u5173\u8054\u4e00\u904d\u3002\u5728\u8f93\u51fa\u6570\u636e\u524d\uff0c\u4f1a\u5224\u65ad\uff0c\u5982\u679c\u88ab\u5173\u8054\u7684\u8fd9\u6761 click_log \u4e4b\u524d\u6ca1\u6709\u5173\u8054\u5230\u8fc7 show_log\uff08\u5373\u5f80\u4e0b\u53d1\u8fc7[+\uff08null\uff0cclick_log\uff09]\uff09\uff0c\u5219\u5148\u53d1\u4e00\u6761[-\uff08null\uff0cclick_log\uff09]\uff0c\u540e\u53d1\u4e00\u6761[+\uff08show_log\uff0cclick_log\uff09]<br>\uff0c\u4ee3\u8868\u628a\u4e4b\u524d\u7684\u90a3\u6761\u6ca1\u6709\u5173\u8054\u5230 show_log \u6570\u636e\u7684 click_log \u4e2d\u95f4\u7ed3\u679c\u7ed9\u64a4\u56de\uff0c\u628a\u5f53\u524d\u5173\u8054\u5230\u7684\u6700\u65b0\u7ed3\u679c\u8fdb\u884c\u4e0b\u53d1\uff0c\u5e76\u628a show_log \u4fdd\u5b58\u5230\u5de6\u8868\u7684\u72b6\u6001\u4e2d\uff08\u4ee5\u4f9b\u540e\u7eed join \u4f7f\u7528\uff09<\/li>\n\n\n\n<li>\u76f8\u540c key \u4e0b\uff0c\u5f53 show_log \u6765\u4e00\u6761\u6570\u636e\uff0c\u5982\u679c click_log \u4e2d\u6ca1\u6709\u6570\u636e\uff1a\u5219 show_log \u4e0d\u4f1a\u7b49\u5f85\uff0c\u76f4\u63a5\u8f93\u51fa[+\uff08show_log\uff0cnull\uff09]\u6570\u636e\uff0c\u5e76\u4e14\u628a show_log \u4fdd\u5b58\u5230\u5de6\u8868\u7684\u72b6\u6001\u4e2d\uff08\u4ee5\u4f9b\u540e\u7eed join \u4f7f\u7528\uff09\u3002<\/li>\n\n\n\n<li>\u76f8\u540c key \u4e0b\uff0c\u5f53 click_log \u6765\u4e00\u6761\u6570\u636e\uff0c\u5982\u679c show_log \u6709\u6570\u636e\uff1a\u5219 click_log \u5bf9 show_log \u4e2d\u6240\u6709\u7684\u6570\u636e\u8fdb\u884c\u904d\u5386\u5173\u8054\u4e00\u904d\u3002\u5728\u8f93\u51fa\u6570\u636e\u524d\uff0c\u4f1a\u5224\u65ad\uff0c\u5982\u679c\u88ab\u5173\u8054\u7684\u8fd9\u6761 show_log \u4e4b\u524d\u6ca1\u6709\u5173\u8054\u5230\u8fc7 click_log\uff08\u5373\u5f80\u4e0b\u53d1\u8fc7[+\uff08show_log\uff0cnull\uff09]\uff09\uff0c\u5219\u5148\u53d1\u4e00\u6761[-\uff08show_log\uff0cnull\uff09]\uff0c\u540e\u53d1\u4e00\u6761[+\uff08show_log\uff0cclick_log\uff09]<br>\uff0c\u4ee3\u8868\u628a\u4e4b\u524d\u7684\u90a3\u6761\u6ca1\u6709\u5173\u8054\u5230 click_log \u6570\u636e\u7684 show_log \u4e2d\u95f4\u7ed3\u679c\u7ed9\u64a4\u56de\uff0c\u628a\u5f53\u524d\u5173\u8054\u5230\u7684\u6700\u65b0\u7ed3\u679c\u8fdb\u884c\u4e0b\u53d1\uff0c\u5e76\u628a click_log \u4fdd\u5b58\u5230\u53f3\u8868\u7684\u72b6\u6001\u4e2d\uff08\u4ee5\u4f9b\u540e\u7eed join \u4f7f\u7528\uff09<\/li>\n\n\n\n<li>\u76f8\u540c key \u4e0b\uff0c\u5f53 click_log \u6765\u4e00\u6761\u6570\u636e\uff0c\u5982\u679c show_log \u4e2d\u6ca1\u6709\u6570\u636e\uff1a\u5219 click_log \u4e0d\u4f1a\u7b49\u5f85\uff0c\u76f4\u63a5\u8f93\u51fa[+\uff08null\uff0cclick_log\uff09]\u6570\u636e\uff0c\u5e76\u4e14\u628a click_log \u4fdd\u5b58\u5230\u53f3\u8868\u7684\u72b6\u6001\u4e2d\uff08\u4ee5\u4f9b\u540e\u7eed join \u4f7f\u7528\uff09\u3002<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"46regular_join_%E7%9A%84%E6%80%BB%E7%BB%93\"><\/span>4.6.regular join \u7684\u603b\u7ed3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u603b\u7684\u6765\u8bf4\u4e0a\u8ff0\u56db\u79cd join \u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u8fd9\u4e48\u5212\u5206\u3002<\/p>\n\n\n\n<ol>\n<li>inner join \u4f1a\u4e92\u76f8\u7b49\uff0c\u76f4\u5230\u6709\u6570\u636e\u624d\u4e0b\u53d1\u3002<\/li>\n\n\n\n<li>left join\uff0cright join\uff0cfull join \u4e0d\u4f1a\u4e92\u76f8\u7b49\uff0c\u53ea\u8981\u6765\u4e86\u6570\u636e\uff0c\u4f1a\u5c1d\u8bd5\u5173\u8054\uff0c\u80fd\u5173\u8054\u5230\u5219\u4e0b\u53d1\u7684\u5b57\u6bb5\u662f\u5168\u7684\uff0c\u5173\u8054\u4e0d\u5230\u5219\u53e6\u4e00\u8fb9\u7684\u5b57\u6bb5\u4e3a null\u3002\u540e\u7eed\u6570\u636e\u6765\u4e86\u4e4b\u540e\uff0c\u53d1\u73b0\u4e4b\u524d\u4e0b\u53d1\u8fc7\u4e3a\u6ca1\u6709\u5173\u8054\u5230\u7684\u6570\u636e\u65f6\uff0c\u5c31\u4f1a\u505a\u56de\u64a4\uff0c\u628a\u5173\u8054\u5230\u7684\u7ed3\u679c\u8fdb\u884c\u4e0b\u53d1<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"47%E6%80%8E%E6%A0%B7%E6%89%8D%E8%83%BD%E8%A7%A3%E5%86%B3_retract_%E5%AF%BC%E8%87%B4%E6%95%B0%E6%8D%AE%E9%87%8D%E5%A4%8D%E4%B8%8B%E5%8F%91%E5%88%B0_kafka_%E8%BF%99%E4%B8%AA%E9%97%AE%E9%A2%98%E5%91%A2%EF%BC%9F\"><\/span>4.7.\u600e\u6837\u624d\u80fd\u89e3\u51b3 retract \u5bfc\u81f4\u6570\u636e\u91cd\u590d\u4e0b\u53d1\u5230 kafka \u8fd9\u4e2a\u95ee\u9898\u5462\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e2\u7136 flink sql \u5728 left join\u3001right join\u3001full join \u5b9e\u73b0\u4e0a\u7684\u539f\u7406\u5c31\u662f\u4ee5\u8fd9\u79cd retract \u7684\u65b9\u5f0f\u53bb\u5b9e\u73b0\u7684\uff0c\u5c31\u4e0d\u80fd\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\u6765\u6ee1\u8db3\u4e1a\u52a1\u4e86\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u6765\u8f6c\u53d8\u4e00\u4e0b\u601d\u8def\uff0c\u4e0a\u8ff0 join \u7684\u7279\u70b9\u5c31\u662f\u4e0d\u4f1a\u76f8\u4e92\u7b49\uff0c\u90a3\u6709\u6ca1\u6709\u4e00\u79cd join \u662f\u53ef\u4ee5\u76f8\u4e92\u7b49\u5f85\u7684\u5462\u3002\u4ee5 left join \u7684\u601d\u8def\u4e3a\u4f8b\uff0c\u5de6\u8868\u5728\u5173\u8054\u4e0d\u5230\u53f3\u8868\u7684\u65f6\u5019\uff0c\u53ef\u4ee5\u9009\u62e9\u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4\uff0c\u5982\u679c\u8d85\u8fc7\u8fd9\u6bb5\u65f6\u95f4\u8fd8\u7b49\u4e0d\u5230\u518d\u4e0b\u53d1 (show_log\uff0cnull)\uff0c\u5982\u679c\u7b49\u5230\u4e86\u5c31\u4e0b\u53d1\uff08show_log\uff0cclick_log\uff09\u3002<\/p>\n\n\n\n<p>interval join \u95ea\u4eae\u767b\u573a\u3002\u5173\u4e8e interval join \u662f\u5982\u4f55\u5b9e\u73b0\u4e0a\u8ff0\u573a\u666f\uff0c\u53ca\u5176\u539f\u7406\u5b9e\u73b0\uff0c\u672c\u7bc7\u7684\uff08\u4e0b\uff09\u4f1a\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u656c\u8bf7\u671f\u5f85\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 join \u7684\u5947\u5999\u89e3\u6790\u4e4b\u8def<\/strong>\u83b7\u53d6\u3002<\/p>\n\n\n\n<p>\u672c\u6587\u4e3b\u8981\u4ecb\u7ecd\u4e86 flink sql regular \u7684\u5728\u6ee1\u8db3 join \u573a\u666f\u65f6\u5b58\u5728\u7684\u95ee\u9898\uff0c\u5e76\u901a\u8fc7\u89e3\u6790\u5176\u5b9e\u73b0\u8bf4\u660e\u4e86\u8fd0\u884c\u539f\u7406\uff0c\u4e3b\u8981\u5305\u542b\u4e0b\u9762\u4e24\u90e8\u5206\uff1a<\/p>\n\n\n\n<ol>\n<li>\u80cc\u666f\u53ca\u5e94\u7528\u573a\u666f\u4ecb\u7ecd\uff1ajoin \u4f5c\u4e3a\u79bb\u7ebf\u6570\u4ed3\u4e2d\u6700\u5e38\u89c1\u7684\u573a\u666f\uff0c\u5728\u5b9e\u65f6\u6570\u4ed3\u4e2d\u4e5f\u5fc5\u7136\u4e0d\u53ef\u80fd\u7f3a\u5c11\u5b83\uff0cflink sql \u63d0\u4f9b\u7684\u4e30\u5bcc\u7684 join \u65b9\u5f0f\uff08\u603b\u7ed3 4 \u79cd\uff1aregular join\uff0c\u7ef4\u8868 join\uff0ctemporal join\uff0cinterval join\uff09\u5bf9\u6211\u4eec\u6ee1\u8db3\u9700\u6c42\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u540e\u76fe<\/li>\n\n\n\n<li>\u5148\u6765\u4e00\u4e2a\u5b9e\u6218\u6848\u4f8b\uff1a\u4ee5\u4e00\u4e2a\u66dd\u5149\u65e5\u5fd7 left join \u70b9\u51fb\u65e5\u5fd7\u4e3a\u6848\u4f8b\u5c55\u5f00\uff0c\u4ecb\u7ecd flink sql join \u7684\u89e3\u51b3\u65b9\u6848<\/li>\n\n\n\n<li>flink sql join \u7684\u89e3\u51b3\u65b9\u6848\u4ee5\u53ca\u5b58\u5728\u95ee\u9898\u7684\u4ecb\u7ecd\uff1a\u4e3b\u8981\u4ecb\u7ecd regular join \u7684\u5728\u4e0a\u8ff0\u6848\u4f8b\u7684\u8fd0\u884c\u7ed3\u679c\u53ca\u5206\u6790\u6e90\u7801\u673a\u5236\uff0c\u5b83\u867d\u7136\u7b80\u5355\uff0c\u4f46\u662f left join\uff0cright join\uff0cfull join \u4f1a\u5b58\u5728\u7740 retract \u7684\u95ee\u9898\uff0c\u6240\u4ee5\u5728\u4f7f\u7528\u524d\uff0c\u4f60\u5e94\u8be5\u5145\u5206\u4e86\u89e3\u5176\u8fd0\u884c\u673a\u5236\uff0c\u907f\u514d\u51fa\u73b0\u6570\u636e\u53d1\u91cd\uff0c\u53d1\u591a\u7684\u95ee\u9898\u3002<\/li>\n\n\n\n<li>\u672c\u6587\u4e3b\u8981\u4ecb\u7ecd regular join retract \u7684\u95ee\u9898\uff0c\u4e0b\u8282\u4ecb\u7ecd\u600e\u4e48\u4f7f\u7528 interval join \u6765\u907f\u514d\u8fd9\u79cd retract \u95ee\u9898\uff0c\u5e76\u6ee1\u8db3\u7b2c 2 \u70b9\u7684\u5b9e\u6218\u6848\u4f8b\u9700\u6c42\u3002<\/li>\n<\/ol>\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\u7684\u4e30\u5bcc\u7684 join \u65b9\u5f0f\uff08\u603b\u7ed3 6 \u79cd\uff1aregular join\uff0c\u7ef4\u8868 join\uff0c\u5feb\u7167 join\uff0cinterval join\uff0carray \u62cd\u5e73\uff0ctable function\uff09\u5bf9\u6211\u4eec\u6ee1\u8db3\u9700\u6c42\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u540e\u76fe\uff0c<br>\u8fd9 6 \u79cd join \u4e2d\u6d89\u53ca\u5230\u6d41\u4e0e\u6d41\u7684 join \u6700\u5e38\u7528\u7684\u662f regular join \u4ee5\u53ca interval join\uff0c\u672c\u8282\u4e3b\u8981\u4ecb\u7ecd interval join<\/li>\n\n\n\n<li><strong>\u6765\u4e00\u4e2a\u5b9e\u6218\u6848\u4f8b<\/strong>\uff1a\u535a\u4e3b\u4ee5\u4e0a\u8282\u8bf4\u5230\u7684\u66dd\u5149\u65e5\u5fd7\u6d41\u70b9\u51fb\u65e5\u5fd7\u6d41\u4e3a\u6848\u4f8b\u5c55\u5f00\uff0c\u4e3b\u8981\u662f\u60f3\u544a\u8bc9\u5c0f\u4f19\u4f34 flink sql left join \u6570\u636e\u4e0d\u4f1a\u4e92\u76f8\u7b49\u5f85\uff0c\u5b58\u5728 retract \u95ee\u9898\uff0c\u4f1a\u5bfc\u81f4\u5199\u5165 kafka \u7684\u6570\u636e\u91cf\u53d8\u5927\uff0c<br>\u7136\u540e\u8f6c\u53d8\u601d\u8def\u4e3a\u4f7f\u7528 flink sql interval join \u7684\u65b9\u5f0f\u53ef\u4ee5\u4f7f\u5f97\u6570\u636e\u4e92\u76f8\u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4\u8fdb\u884c join\uff0c\u8fd9\u79cd\u65b9\u5f0f\u4e0d\u4f1a\u5b58\u5728 retract \u95ee\u9898<\/li>\n\n\n\n<li><strong>flink sql interval join \u7684\u89e3\u51b3\u65b9\u6848\u4ee5\u53ca\u539f\u7406\u7684\u4ecb\u7ecd<\/strong>\uff1a\u4e3b\u8981\u4ecb\u7ecd interval join \u7684\u5728\u4e0a\u8ff0\u5b9e\u6218\u6848\u4f8b\u7684\u8fd0\u884c\u7ed3\u679c\u53ca\u5206\u6790\u6e90\u7801\u673a\u5236\uff0c\u535a\u4e3b\u671f\u671b\u4f60\u80fd\u4e86\u89e3\u5230\uff0cinterval join \u7684\u6267\u884c\u673a\u5236\u662f\u4f1a\u5728\u4f60\u8bbe\u7f6e\u7684 interval \u533a\u95f4\u4e4b\u5185\u4e92\u76f8\u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4\uff0c\u4e00\u65e6\u65f6\u95f4\u63a8\u8fdb\uff08\u4e8b\u4ef6\u65f6\u95f4\u7531 watermark \u63a8\u8fdb\uff09\u5230\u533a\u95f4\u4e4b\u5916\uff08\u5373\u5f53\u524d\u8fd9\u6761\u6570\u636e\u518d\u4e5f\u4e0d\u53ef\u80fd\u88ab\u53e6\u4e00\u6761\u6d41\u7684\u6570\u636e join \u5230\u65f6\uff09\uff0couter join \u4f1a\u8f93\u51fa\u6ca1\u6709 join \u5230\u7684\u6570\u636e\uff0cinner join \u4f1a\u4ece state \u4e2d\u5220\u9664\u8fd9\u6761\u6570\u636e<\/li>\n\n\n\n<li><strong>\u603b\u7ed3\u53ca\u5c55\u671b<\/strong><\/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-2\"><\/span>2.\u80cc\u666f\u53ca\u5e94\u7528\u573a\u666f\u4ecb\u7ecd<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u4e66\u63a5\u4e0a\u6587\uff0c\u4e0a\u6587\u4ecb\u7ecd\u4e86\u66dd\u5149\u6d41\u5728\u5173\u8054\u70b9\u51fb\u6d41\u65f6\uff0c\u4f7f\u7528 flink sql regular join \u5b58\u5728\u7684 retract \u95ee\u9898\u3002<\/p>\n\n\n\n<p>\u672c\u6587\u4ecb\u7ecd\u600e\u4e48\u4f7f\u7528 flink sql interval join \u89e3\u51b3\u8fd9\u4e9b\u95ee\u9898\u3002<\/p>\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><a href=\"https:\/\/link.zhihu.com\/?target=http%3A\/\/mp.weixin.qq.com\/s%3F__biz%3DMzkxNjA1MzM5OQ%3D%3D%26mid%3D2247489633%26idx%3D1%26sn%3D24b418a8192116306eb3aab00ff24600%26chksm%3Dc1549499f6231d8ff40cdacd0504a21e605c07ba37fcfb4f5877523bac727e7955702882d7a2%26scene%3D21%23wechat_redirect\" target=\"_blank\" rel=\"noreferrer noopener\">flink sql \u77e5\u5176\u6240\u4ee5\u7136\uff08\u5341\u4e8c\uff09\uff1a\u6d41 join \u5f88\u96be\u561b\uff1f\uff1f\uff1f\uff08\u4e0a\uff09<\/a><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic2.zhimg.com\/80\/v2-9935866eaf66dea768575e853e67f8d5_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u770b\u770b\u4e0a\u8282\u7684\u5b9e\u9645\u6848\u4f8b\uff0c\u6765\u770b\u770b\u5728\u5177\u4f53\u8f93\u5165\u503c\u7684\u573a\u666f\u4e0b\uff0c\u8f93\u51fa\u503c\u5e94\u8be5\u957f\u5565\u6837\u3002<\/p>\n\n\n\n<p>\u573a\u666f\uff1a\u5373\u5e38\u89c1\u7684\u66dd\u5149\u65e5\u5fd7\u6d41\uff08show_log\uff09\u901a\u8fc7 log_id \u5173\u8054\u70b9\u51fb\u65e5\u5fd7\u6d41\uff08click_log\uff09\uff0c\u5c06\u6570\u636e\u7684\u5173\u8054\u7ed3\u679c\u8fdb\u884c\u4e0b\u53d1\u3002<\/p>\n\n\n\n<p>\u6765\u4e00\u6ce2\u8f93\u5165\u6570\u636e\uff1a<\/p>\n\n\n\n<p>\u66dd\u5149\u6570\u636e\uff1a<\/p>\n\n\n\n<p>\u70b9\u51fb\u6570\u636e\uff1a<\/p>\n\n\n\n<p>\u9884\u671f\u8f93\u51fa\u6570\u636e\u5982\u4e0b\uff1a<\/p>\n\n\n\n<p>\u4e0a\u8282\u7684 flink sql regular join \u89e3\u51b3\u65b9\u6848\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>INSERT INTO sink_table\nSELECT\n    show_log.log_id as log_id,\n    show_log.timestamp as timestamp,\n    show_log.show_params as show_params,\n    click_log.click_params as click_params\nFROM show_log\nLEFT JOIN click_log ON show_log.log_id = click_log.log_id;\n<\/code><\/pre>\n\n\n\n<p>\u4e0a\u8282\u8bf4\u9053\uff0cflink sql left join \u5728\u6d41\u6570\u636e\u5230\u8fbe\u65f6\uff0c\u5982\u679c\u5de6\u8868\u6d41\uff08show_log\uff09join \u4e0d\u5230\u53f3\u8868\u6d41\uff08click_log\uff09<br>\uff0c\u5219\u4e0d\u4f1a\u7b49\u5f85\u53f3\u6d41\u76f4\u63a5\u8f93\u51fa\uff08show_log\uff0cnull\uff09\uff0c\u5728\u540e\u7eed\u53f3\u8868\u6d41\u6570\u636e\u4ee3\u6253\u65f6\uff0c\u4f1a\u5c06\uff08show_log\uff0cnull\uff09\u64a4\u56de\uff0c\u53d1\u9001\uff08show_log\uff0cclick_log\uff09\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u4ea7\u751f\u4e86 retract \u6d41\uff0c\u4ece\u800c\u5bfc\u81f4\u91cd\u590d\u5199\u5165 kafka\u3002<\/p>\n\n\n\n<p>\u5bf9\u6b64\uff0c\u6211\u4eec\u4e5f\u662f\u63d0\u51fa\u4e86\u5bf9\u5e94\u7684\u89e3\u51b3\u601d\u8def\uff0c\u65e2\u7136 left join \u4e2d\u5de6\u6d41\u4e0d\u4f1a\u7b49\u5f85\u53f3\u6d41\uff0c\u90a3\u4e48\u80fd\u4e0d\u80fd\u8ba9\u5de6\u6d41\u5f3a\u884c\u7b49\u5f85\u53f3\u6d41\u4e00\u6bb5\u65f6\u95f4\uff0c\u5b9e\u5728\u7b49\u4e0d\u5230\u5728\u6570\u636e\u5173\u8054\u4e0d\u5230\u7684\u6570\u636e\u5373\u53ef\u3002<\/p>\n\n\n\n<p>\u5f53\u5f53\u5f53\uff01\uff01\uff01<\/p>\n\n\n\n<p>\u672c\u6587\u7684 flink sql interval join \u767b\u573a\uff0c\u5b83\u5c31\u80fd\u7b49\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4flink_sql_interval_join\"><\/span>4.flink sql interval join<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"41interval_join_%E5%AE%9A%E4%B9%89\"><\/span>4.1.interval join \u5b9a\u4e49<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u5927\u5bb6\u5148\u901a\u8fc7\u4e0b\u9762\u8fd9\u53e5\u8bdd\u548c\u56fe\u7b80\u5355\u4e86\u89e3\u4e00\u4e0b interval join \u7684\u4f5c\u7528\uff08\u719f\u6089 DataStream \u7684\u5c0f\u4f19\u4f34\u840c\u53ef\u80fd\u5df2\u7ecf\u4f7f\u7528\u8fc7\u4e86\uff09\uff0c\u540e\u7eed\u4f1a\u8be6\u7ec6\u4ecb\u7ecd\u539f\u7406\u3002<\/p>\n\n\n\n<p>interval join \u5c31\u662f\u7528\u4e00\u4e2a\u6d41\u7684\u6570\u636e\u53bb\u5173\u8054\u53e6\u4e00\u4e2a\u6d41\u7684\u4e00\u6bb5\u65f6\u95f4\u533a\u95f4\u5185\u7684\u6570\u636e\u3002\u5173\u8054\u5230\u5c31\u4e0b\u53d1\u5173\u8054\u5230\u7684\u6570\u636e\uff0c\u5173\u8054\u4e0d\u5230\u4e14\u5728\u8d85\u65f6\u540e\u5c31\u6839\u636e\u662f\u5426\u662f outer join\uff08left join\uff0cright join\uff0cfull join\uff09\u4e0b\u53d1\u6ca1\u5173\u8054\u5230\u7684\u6570\u636e\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic3.zhimg.com\/80\/v2-cbcc9ef907b9b0b19936faa0a3276fba_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>interval join<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"42%E6%A1%88%E4%BE%8B%E8%A7%A3%E5%86%B3%E6%96%B9%E6%A1%88\"><\/span>4.2.\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 interval join sql \u600e\u4e48\u5199\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>INSERT INTO sink_table\nSELECT\n    show_log.log_id as log_id,\n    show_log.timestamp as timestamp,\n    show_log.show_params as show_params,\n    click_log.click_params as click_params\nFROM show_log LEFT JOIN click_log ON show_log.log_id = click_log.log_id\nAND show_log.row_time \n    BETWEEN click_log.row_time - INTERVAL '10' MINUTE \n    AND click_log.row_time + INTERVAL '10' MINUTE;\n<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u8bbe\u7f6e\u4e86&nbsp;<code>show_log.row_time BETWEEN click_log.row_time - INTERVAL '10' MINUTE AND click_log.row_time + INTERVAL '10' MINUTE<\/code>\u4ee3\u8868 show_log \u8868\u4e2d\u7684\u6570\u636e\u4f1a\u548c click_log \u8868\u4e2d\u7684 row_time \u5728\u524d\u540e 10 \u5206\u949f\u4e4b\u5185\u7684\u6570\u636e\u8fdb\u884c\u5173\u8054\u3002<\/p>\n\n\n\n<p>\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>+&#91;1 | 2021-11-01 00:01:03 | show_params | click_params]\n+&#91;2 | 2021-11-01 00:03:00 | show_params | click_params]\n+&#91;3 | 2021-11-01 00:05:00 | show_params | null]\n<\/code><\/pre>\n\n\n\n<p>\u5982\u4e0a\u5c31\u662f\u6211\u4eec\u671f\u671b\u7684\u6b63\u786e\u7ed3\u679c\u4e86\u3002<\/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:\/\/pic4.zhimg.com\/80\/v2-6eefda40fd3e98fbc2541fae8e6d56af_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>flink web ui<\/p>\n\n\n\n<p>\u90a3\u4e48\u6b64\u65f6\u4f60\u53ef\u80fd\u6709\u4e00\u4e2a\u95ee\u9898\uff0c\u7ed3\u679c\u4e2d\u7684\u524d\u4e24\u6761\u6570\u636e join \u5230\u4e86\u8f93\u51fa\u6211\u662f\u7406\u89e3\u7684\uff0c\u90a3\u5f53 show_log join \u4e0d\u5230 click_log \u65f6\u4e3a\u5565\u4e5f\u8f93\u51fa\u4e86\uff1f\u539f\u7406\u662f\u5565\uff1f<\/p>\n\n\n\n<p>\u535a\u4e3b\u5e26\u4f60\u4eec\u6765\u5b9a\u4f4d\u5230\u5177\u4f53\u7684\u5b9e\u73b0\u6e90\u7801\u3002\u5148\u770b\u4e00\u4e0b transformations\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic1.zhimg.com\/80\/v2-a2d5f34a505454f209ae96f3416845c4_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>transformations<\/p>\n\n\n\n<p>\u53ef\u4ee5\u770b\u5230\u4e8b\u4ef6\u65f6\u95f4\u4e0b interval join \u7684\u5177\u4f53 operator \u662f&nbsp;<code>org.apache.flink.table.runtime.operators.join.KeyedCoProcessOperatorWithWatermarkDelay<\/code>\u3002<\/p>\n\n\n\n<p>\u5176\u6838\u5fc3\u903b\u8f91\u5c31\u96c6\u4e2d\u5728&nbsp;<code>processElement1<\/code>&nbsp;\u548c&nbsp;<code>processElement2<\/code>&nbsp;\u4e2d\uff0c\u5728&nbsp;<code>processElement1<\/code>&nbsp;\u548c&nbsp;<code>processElement2<\/code>&nbsp;\u4e2d\u4f7f\u7528&nbsp;<code>org.apache.flink.table.runtime.operators.join.interval.RowTimeIntervalJoin<\/code>&nbsp;\u6765\u5904\u7406\u5177\u4f53 join \u903b\u8f91\u3002<code>RowTimeIntervalJoin<\/code>&nbsp;\u91cd\u8981\u65b9\u6cd5\u5982\u4e0b\u56fe\u6240\u793a\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic4.zhimg.com\/80\/v2-dc1715ce0cc9a393b1f5efd37825525f_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>TimeIntervalJoin<\/p>\n\n\n\n<p>\u4e0b\u9762\u8be6\u7ec6\u7ed9\u5927\u5bb6\u89e3\u91ca\u4e00\u4e0b\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"43TimeIntervalJoin_%E7%AE%80%E7%89%88%E8%AF%B4%E6%98%8E\"><\/span>4.3.TimeIntervalJoin \u7b80\u7248\u8bf4\u660e<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>join \u65f6\uff0c\u5de6\u6d41\u548c\u53f3\u6d41\u4f1a\u5728 interval \u65f6\u95f4\u4e4b\u5185\u76f8\u4e92\u7b49\u5f85\uff0c\u5982\u679c\u7b49\u5230\u4e86\u5219\u8f93\u51fa\u6570\u636e[+\uff08show_log\uff0cclick_log\uff09]\uff0c\u5982\u679c\u7b49\u4e0d\u5230\uff0c\u5e76\u4e14\u53e6\u4e00\u6761\u6d41\u7684\u65f6\u95f4\u5df2\u7ecf\u63a8\u8fdb\u5230\u5f53\u524d\u8fd9\u6761\u6570\u636e\u5728\u4e5f\u4e0d\u53ef\u80fd join \u5230\u53e6\u4e00\u6761\u6d41\u7684\u6570\u636e\u65f6\uff0c\u5219\u76f4\u63a5\u8f93\u51fa[+\uff08show_log\uff0cnull\uff09]\uff0c[+\uff08null\uff0cclick_log\uff09]\u3002<\/p>\n\n\n\n<p>\u4e3e\u4e2a\u4f8b\u5b50\uff0c<code>show_log.row_time BETWEEN click_log.row_time - INTERVAL '10' MINUTE AND click_log.row_time + INTERVAL '10' MINUTE<\/code>\uff0c<br>\u5f53 click_log \u7684\u65f6\u95f4\u63a8\u8fdb\u5230&nbsp;<code>2021-11-01 11:00:00<\/code>&nbsp;\u65f6\uff0c\u8fd9\u65f6 show_log \u6765\u4e00\u6761&nbsp;<code>2021-11-01 02:00:00<\/code>&nbsp;\u7684\u6570\u636e\uff0c<br>\u90a3\u8fd9\u6761 show_log \u5fc5\u7136\u4e0d\u53ef\u80fd\u548c click_log \u4e2d\u7684\u6570\u636e join \u5230\u4e86\uff0c\u56e0\u4e3a click_log \u4e2d&nbsp;<code>2021-11-01 01:50:00<\/code>&nbsp;\u5230&nbsp;<code>2021-11-01 02:10:00<\/code>&nbsp;\u4e4b\u95f4\u7684\u6570\u636e\u4ee5\u53ca\u8fc7\u671f\u5220\u9664\u4e86\u3002\u5219 show_log \u76f4\u63a5\u8f93\u51fa [+\uff08show_log\uff0cnull\uff09]<\/p>\n\n\n\n<blockquote class=\"wp-block-quote\">\n<p>Notes\uff1a<br>\u5982\u679c\u4f60\u8bbe\u7f6e\u4e86 allowLateness\uff0cjoin \u4e0d\u5230\u7684\u6570\u636e\u7684\u8f93\u51fa\u548c state \u7684\u6e05\u7406\u4f1a\u591a\u4fdd\u7559 allowLateness \u65f6\u95f4<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"44TimeIntervalJoin_%E8%AF%A6%E7%BB%86%E5%AE%9E%E7%8E%B0%E8%AF%B4%E6%98%8E\"><\/span>4.4.TimeIntervalJoin \u8be6\u7ec6\u5b9e\u73b0\u8bf4\u660e<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u4ee5\u4e0a\u9762\u6848\u4f8b\u7684 show_log\uff08\u5de6\u8868\uff09 interval join click_log\uff08\u53f3\u8868\uff09 \u4e3a\u4f8b\uff08\u4e0d\u7ba1\u662f inner interval join\uff0cleft interval join\uff0cright interval join \u8fd8\u662f full interval join\uff0c\u90fd\u4f1a\u6309\u7167\u4e0b\u9762\u7684\u6d41\u7a0b\u6267\u884c\uff09\uff1a<\/p>\n\n\n\n<ol>\n<li><strong>\u7b2c\u4e00\u6b65<\/strong>\uff0c\u9996\u5148\u5982\u679c join xxx on \u4e2d\u7684\u6761\u4ef6\u662f\u7b49\u5f0f\u5219\u4ee3\u8868 join \u662f\u5728\u76f8\u540c key \u4e0b\u8fdb\u884c\u7684\uff08\u4e0a\u8ff0\u6848\u4f8b\u4e2d join \u7684 key \u5373 show_log.log_id\uff0cclick_log.log_id\uff09\uff0c\u76f8\u540c key \u7684\u6570\u636e\u4f1a\u88ab\u53d1\u9001\u5230\u4e00\u4e2a\u5e76\u53d1\u4e2d\u8fdb\u884c\u5904\u7406\u3002\u5982\u679c join xxx on \u4e2d\u7684\u6761\u4ef6\u662f\u4e0d\u7b49\u5f0f\uff0c\u5219\u4e24\u4e2a\u6d41\u7684 source \u7b97\u5b50\u5411 join \u7b97\u5b50\u4e0b\u53d1\u6570\u636e\u662f\u6309\u7167 global \u7684 partition \u7b56\u7565\u8fdb\u884c\u4e0b\u53d1\u7684\uff0c\u5e76\u4e14 join \u7b97\u5b50\u5e76\u53d1\u4f1a\u88ab\u8bbe\u7f6e\u4e3a 1\uff0c\u6240\u6709\u7684\u6570\u636e\u4f1a\u88ab\u53d1\u9001\u5230\u8fd9\u4e00\u4e2a\u5e76\u53d1\u4e2d\u5904\u7406\u3002<\/li>\n\n\n\n<li><strong>\u7b2c\u4e8c\u6b65<\/strong>\uff0c\u76f8\u540c key \u4e0b\uff0c\u4e00\u6761 show_log \u7684\u6570\u636e\u5148\u5230\u8fbe\uff0c\u9996\u5148\u4f1a\u8ba1\u7b97\u51fa\u4e0b\u9762\u8981\u4f7f\u7528\u7684\u6700\u91cd\u8981\u7684\u4e09\u7c7b\u65f6\u95f4\u6233\uff1a<\/li>\n<\/ol>\n\n\n\n<ul>\n<li>\u6839\u636e show_log \u7684\u65f6\u95f4\u6233\uff08l_time\uff09\u8ba1\u7b97\u51fa\u80fd\u5173\u8054\u5230\u7684\u53f3\u6d41\u7684\u65f6\u95f4\u533a\u95f4\u4e0b\u9650\uff08r_lower\uff09\u3001\u4e0a\u9650\uff08r_upper\uff09<\/li>\n\n\n\n<li>\u6839\u636e show_log \u76ee\u524d\u7684 watermark \u8ba1\u7b97\u51fa\u76ee\u524d\u53f3\u6d41\u7684\u6570\u636e\u80fd\u591f\u8fc7\u671f\u505a\u8fc7\u671f\u5904\u7406\u7684\u65f6\u95f4\u7684\u6700\u5c0f\u503c\uff08r_expire\uff09<\/li>\n\n\n\n<li>\u83b7\u53d6\u5de6\u6d41\u7684 l_watermark\uff0c\u53f3\u6d41\u7684 r_watermark\uff0c\u8fd9\u4e24\u4e2a\u65f6\u95f4\u6233\u5728\u4e8b\u4ef6\u8bed\u4e49\u7684\u4efb\u52a1\u4e2d\u90fd\u662f watermark<\/li>\n<\/ul>\n\n\n\n<ol>\n<li><strong>\u7b2c\u4e09\u6b65<\/strong>\uff0c\u904d\u5386\u6240\u6709\u540c key \u4e0b\u7684 click_log \u6765\u505a join<\/li>\n<\/ol>\n\n\n\n<ul>\n<li>\u5bf9\u4e8e\u904d\u5386\u7684\u6bcf\u4e00\u6761 click_log\uff0c\u8d70\u5982\u4e0b\u6b65\u9aa4<\/li>\n\n\n\n<li>\u7ecf\u8fc7\u5224\u65ad\uff0c\u5982\u679c on \u4e2d\u7684\u6761\u4ef6\u4e3a true\uff0c\u5219\u548c click_log \u5173\u8054\uff0c\u8f93\u51fa[+\uff08show_log\uff0cclick_log\uff09]\u6570\u636e\uff1b\u5982\u679c on \u4e2d\u7684\u6761\u4ef6\u4e3a false\uff0c\u5219\u5565\u4e5f\u4e0d\u5e72<\/li>\n\n\n\n<li>\u63a5\u7740\u5224\u65ad\u5f53\u524d\u8fd9\u6761 click_log \u7684\u6570\u636e\u65f6\u95f4\uff08r_time\uff09\u662f\u5426\u5c0f\u4e8e\u53f3\u6d41\u7684\u6570\u636e\u8fc7\u671f\u65f6\u95f4\u7684\u6700\u5c0f\u503c\uff08r_expire\uff09\uff08\u5373\u5224\u65ad\u8fd9\u6761 click_log \u662f\u5426\u6c38\u8fdc\u4e0d\u4f1a\u518d\u88ab show_log join \u5230\u4e86\uff09\u3002\u5982\u679c\u5c0f\u4e8e\uff0c\u5e76\u4e14\u5f53\u524d click_log \u8fd9\u4e00\u4fa7\u662f outer join\uff0c\u5219\u4e0d\u7528\u7b49\u76f4\u63a5\u8f93\u51fa[+\uff08null\uff0cclick_log\uff09]\uff09\uff0c\u4ece\u72b6\u6001\u5220\u9664\u8fd9\u6761 click_log\uff1b\u5982\u679c click_log \u8fd9\u4e00\u4fa7\u4e0d\u662f outer join\uff0c\u5219\u76f4\u63a5\u4ece\u72b6\u6001\u91cc\u5220\u9664\u8fd9\u6761 click_log\u3002<\/li>\n<\/ul>\n\n\n\n<ol>\n<li><strong>\u7b2c\u56db\u6b65<\/strong>\uff0c\u5224\u65ad\u53f3\u6d41\u7684\u65f6\u95f4\u6233\uff08r_watermark\uff09\u662f\u5426\u5c0f\u4e8e\u80fd\u5173\u8054\u5230\u7684\u53f3\u6d41\u7684\u65f6\u95f4\u533a\u95f4\u4e0a\u9650\uff08r_upper\uff09\uff1a<\/li>\n<\/ol>\n\n\n\n<ul>\n<li>\u5982\u679c\u662f\uff0c\u5219\u8bf4\u660e\u8fd9\u6761 show_log \u8fd8\u6709\u53ef\u80fd\u88ab click_log join \u5230\uff0c\u5219 show_log \u653e\u5230 state \u4e2d\uff0c\u5e76\u6ce8\u518c\u540e\u9762\u7528\u4e8e\u72b6\u6001\u6e05\u9664\u7684 timer\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u5426\uff0c\u5219\u8bf4\u660e\u5173\u8054\u4e0d\u5230\u4e86\uff0c\u5219\u8f93\u51fa[+\uff08show_log\uff0cnull\uff09]<\/li>\n<\/ul>\n\n\n\n<ol>\n<li><strong>\u7b2c\u4e94\u6b65<\/strong>\uff0ctimer \u89e6\u53d1\u65f6\uff1a<\/li>\n<\/ol>\n\n\n\n<ul>\n<li>timer \u89e6\u53d1\u65f6\uff0c\u6839\u636e\u5f53\u524d l_watermark\uff0cr_watermark \u4ee5\u53ca state \u4e2d\u5b58\u50a8\u7684 show_log\uff0cclick_log \u7684 l_time\uff0cr_time \u5224\u65ad\u662f\u5426\u518d\u4e5f\u4e0d\u4f1a\u88ab\u5bf9\u65b9 join \u5230\uff0c\u5982\u679c\u662f\uff0c\u5219\u6839\u636e\u662f\u5426\u4e3a outer join \u5bf9\u5e94\u8f93\u51fa[+\uff08show_log\uff0cnull\uff09]\uff0c[+\uff08null\uff0cclick_log\uff09]\uff0c\u5e76\u4ece\u72b6\u6001\u4e2d\u5220\u9664\u5bf9\u5e94\u7684 show_log\uff0cclick_log\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4e0a\u9762\u53ea\u662f\u5de6\u6d41 show_log \u6570\u636e\u5230\u8fbe\u65f6\u7684\u6267\u884c\u6d41\u7a0b\uff08\u5373&nbsp;<code>ProcessElement1<\/code>\uff09\uff0c\u5f53\u53f3\u6d41 click_log \u5230\u8fbe\u65f6\u4e5f\u662f\u5b8c\u5168\u7c7b\u4f3c\u7684\u6267\u884c\u6d41\u7a0b\uff08\u5373&nbsp;<code>ProcessElement2<\/code>\uff09\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"45%E4%BD%BF%E7%94%A8%E6%B3%A8%E6%84%8F%E4%BA%8B%E9%A1%B9\"><\/span>4.5.\u4f7f\u7528\u6ce8\u610f\u4e8b\u9879<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u5c0f\u4f19\u4f34\u840c\u5728\u4f7f\u7528 interval join \u9700\u8981\u6ce8\u610f\u7684\u4e24\u70b9\u4e8b\u9879\uff1a<\/p>\n\n\n\n<ol>\n<li><strong>interval join \u7684\u65f6\u95f4\u533a\u95f4\u53d6\u51b3\u4e8e\u65e5\u5fd7\u7684\u771f\u5b9e\u60c5\u51b5<\/strong>\uff1a\u8bbe\u7f6e\u5927\u4e86\u5bb9\u6613\u9020\u6210\u4efb\u52a1\u7684 state \u592a\u5927\uff0c\u5e76\u4e14\u65f6\u6548\u6027\u4e5f\u4f1a\u53d8\u5dee\u3002\u8bbe\u7f6e\u5c0f\u4e86\uff0cjoin \u4e0d\u5230\uff0c\u4e0b\u53d1\u7684\u6570\u636e\u5728\u540e\u7eed\u4f7f\u7528\u65f6\uff0c\u6570\u636e\u8d28\u91cf\u4f1a\u5b58\u5728\u95ee\u9898\u3002\u6240\u4ee5\u5c0f\u4f19\u4f34\u840c\u5728\u4f7f\u7528\u65f6\u5efa\u8bae\u5148\u4f7f\u7528\u79bb\u7ebf\u6570\u636e\u505a\u4e00\u904d\u4e24\u6761\u6d41\u7684\u65f6\u95f4\u6233 diff \u6bd4\u8f83\uff0c\u6765\u786e\u5b9a\u771f\u5b9e\u60c5\u51b5\u4e0b\u7684\u65f6\u95f4\u6233 diff \u7684\u5206\u5e03\u662f\u600e\u6837\u7684\u3002\u4e3e\u4f8b\uff1a\u4f60\u901a\u8fc7\u79bb\u7ebf\u6570\u636e join \u5e76\u505a\u65f6\u95f4\u6233 diff \u540e\u53d1\u73b0 99% \u7684\u6570\u636e\u90fd\u80fd\u5728\u65f6\u95f4\u6233\u76f8\u5dee 5min \u4ee5\u5185 join \u5230\uff0c\u90a3\u4e48\u4f60\u5c31\u6709\u4f9d\u636e\u53bb\u8bbe\u7f6e interval \u65f6\u95f4\u5dee\u4e3a 5min\u3002<\/li>\n\n\n\n<li><strong>interval join \u4e2d\u7684\u65f6\u95f4\u533a\u95f4\u6761\u4ef6\u5373\u652f\u6301\u4e8b\u4ef6\u65f6\u95f4\uff0c\u4e5f\u652f\u6301\u5904\u7406\u65f6\u95f4<\/strong>\u3002\u4e8b\u4ef6\u65f6\u95f4\u7531 watermark \u63a8\u8fdb\u3002<\/li>\n<\/ol>\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-2\"><\/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 interval join<\/strong>\u83b7\u53d6\u3002<\/p>\n\n\n\n<p>\u672c\u6587\u4e3b\u8981\u4ecb\u7ecd\u4e86 flink sql interval \u662f\u600e\u4e48\u907f\u514d\u51fa\u73b0 flink regular join \u5b58\u5728\u7684 retract \u95ee\u9898\u7684\uff0c\u5e76\u901a\u8fc7\u89e3\u6790\u5176\u5b9e\u73b0\u8bf4\u660e\u4e86\u8fd0\u884c\u539f\u7406\uff0c\u535a\u4e3b\u671f\u671b\u4f60\u8bfb\u5b8c\u672c\u6587\u4e4b\u540e\u80fd\u4e86\u89e3\u5230\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\u7684\u4e30\u5bcc\u7684 join \u65b9\u5f0f\uff08\u603b\u7ed3 6 \u79cd\uff1aregular join\uff0c\u7ef4\u8868 join\uff0c\u5feb\u7167 join\uff0cinterval join\uff0carray \u62cd\u5e73\uff0ctable function\uff09\u5bf9\u6211\u4eec\u6ee1\u8db3\u9700\u6c42\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u540e\u76fe\uff0c<br>\u8fd9 6 \u79cd join \u4e2d\u6d89\u53ca\u5230\u6d41\u4e0e\u6d41\u7684 join \u6700\u5e38\u7528\u7684\u662f regular join \u4ee5\u53ca interval join\uff0c\u672c\u8282\u4e3b\u8981\u4ecb\u7ecd interval join<\/li>\n\n\n\n<li><strong>\u6765\u4e00\u4e2a\u5b9e\u6218\u6848\u4f8b<\/strong>\uff1a\u535a\u4e3b\u4ee5\u4e0a\u8282\u8bf4\u5230\u7684\u66dd\u5149\u65e5\u5fd7\u6d41\u70b9\u51fb\u65e5\u5fd7\u6d41\u4e3a\u6848\u4f8b\u5c55\u5f00\uff0c\u4e3b\u8981\u662f\u60f3\u544a\u8bc9\u5c0f\u4f19\u4f34 flink sql left join \u6570\u636e\u4e0d\u4f1a\u4e92\u76f8\u7b49\u5f85\uff0c\u5b58\u5728 retract \u95ee\u9898\uff0c\u4f1a\u5bfc\u81f4\u5199\u5165 kafka \u7684\u6570\u636e\u91cf\u53d8\u5927\uff0c<br>\u7136\u540e\u8f6c\u53d8\u601d\u8def\u4e3a\u4f7f\u7528 flink sql interval join \u7684\u65b9\u5f0f\u53ef\u4ee5\u4f7f\u5f97\u6570\u636e\u4e92\u76f8\u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4\u8fdb\u884c join\uff0c\u8fd9\u79cd\u65b9\u5f0f\u4e0d\u4f1a\u5b58\u5728 retract \u95ee\u9898<\/li>\n\n\n\n<li><strong>flink sql interval join \u7684\u89e3\u51b3\u65b9\u6848\u4ee5\u53ca\u539f\u7406\u7684\u4ecb\u7ecd<\/strong>\uff1a\u4e3b\u8981\u4ecb\u7ecd interval join \u7684\u5728\u4e0a\u8ff0\u5b9e\u6218\u6848\u4f8b\u7684\u8fd0\u884c\u7ed3\u679c\u53ca\u5206\u6790\u6e90\u7801\u673a\u5236\uff0c\u535a\u4e3b\u671f\u671b\u4f60\u80fd\u4e86\u89e3\u5230\uff0cinterval join \u7684\u6267\u884c\u673a\u5236\u662f\u4f1a\u5728\u4f60\u8bbe\u7f6e\u7684 interval \u533a\u95f4\u4e4b\u5185\u4e92\u76f8\u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4\uff0c\u4e00\u65e6\u65f6\u95f4\u63a8\u8fdb\uff08\u4e8b\u4ef6\u65f6\u95f4\u7531 watermark \u63a8\u8fdb\uff09\u5230\u533a\u95f4\u4e4b\u5916\uff08\u5373\u5f53\u524d\u8fd9\u6761\u6570\u636e\u518d\u4e5f\u4e0d\u53ef\u80fd\u88ab\u53e6\u4e00\u6761\u6d41\u7684\u6570\u636e join \u5230\u65f6\uff09\uff0couter join \u4f1a\u8f93\u51fa\u6ca1\u6709 join \u5230\u7684\u6570\u636e\uff0cinner join \u4f1a\u4ece state \u4e2d\u5220\u9664\u8fd9\u6761\u6570\u636e<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>1.\u5e8f\u7bc7 \u770b\u4e86\u90a3\u4e48\u591a\u7684\u6280\u672f\u6587\uff0c\u4f60\u80fd\u660e\u767d\u4f5c\u8005\u60f3\u8ba9\u4f60\u5728\u8bfb\u5b8c\u6587\u7ae0\u540e\u5b66\u5230\u4ec0\u4e48\u5417\uff1f \u5927\u6570\u636e\u7f8a\u8bf4\u7684\u6587\u7ae0\u4f1a\u8ba9\u4f60\u660e\u767d&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%b512-%e6%b5%81-join-%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7\/\" class=\"more-link read-more\" rel=\"bookmark\">\u7ee7\u7eed\u9605\u8bfb <span class=\"screen-reader-text\">\u3010\u8fd0\u7ef4\u5de5\u5177\u3011Flink SQL \u5b9e\u8df512 \u6d41 join\u00a0\u5e38\u7528\u6280\u5de7<\/span><i class=\"fa 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