{"id":1328,"date":"2023-03-19T17:39:32","date_gmt":"2023-03-19T09:39:32","guid":{"rendered":"http:\/\/viplao.com\/?p=1328"},"modified":"2023-03-19T17:39:56","modified_gmt":"2023-03-19T09:39:56","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%b57-%e4%b8%8d%e4%bc%9a%e8%bf%9e%e6%9c%80%e9%80%82%e5%90%88-flink-sql-%e7%9a%84-etl-%e5%92%8c-group-agg-%e5%9c%ba","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%b57-%e4%b8%8d%e4%bc%9a%e8%bf%9e%e6%9c%80%e9%80%82%e5%90%88-flink-sql-%e7%9a%84-etl-%e5%92%8c-group-agg-%e5%9c%ba\/","title":{"rendered":"\u3010\u8fd0\u7ef4\u5de5\u5177\u3011Flink SQL \u5b9e\u8df57 \u4e0d\u4f1a\u8fde\u6700\u9002\u5408 flink sql \u7684 ETL \u548c group agg \u573a\u666f\u90fd\u6ca1\u89c1\u8fc7\u5427\uff1f"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_71 counter-hierarchy ez-toc-counter 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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%b57-%e4%b8%8d%e4%bc%9a%e8%bf%9e%e6%9c%80%e9%80%82%e5%90%88-flink-sql-%e7%9a%84-etl-%e5%92%8c-group-agg-%e5%9c%ba\/#4%E5%AE%9E%E6%88%98%E7%AF%87-%E7%AE%80%E5%8D%95%E7%9A%84_query_%E6%A1%88%E4%BE%8B%E5%92%8C%E8%BF%90%E8%A1%8C%E5%8E%9F%E7%90%86\" title=\"4.\u5b9e\u6218\u7bc7-\u7b80\u5355\u7684 query \u6848\u4f8b\u548c\u8fd0\u884c\u539f\u7406\">4.\u5b9e\u6218\u7bc7-\u7b80\u5355\u7684 query \u6848\u4f8b\u548c\u8fd0\u884c\u539f\u7406<\/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%b57-%e4%b8%8d%e4%bc%9a%e8%bf%9e%e6%9c%80%e9%80%82%e5%90%88-flink-sql-%e7%9a%84-etl-%e5%92%8c-group-agg-%e5%9c%ba\/#41%E5%9C%BA%E6%99%AF%E9%97%AE%E9%A2%98%EF%BC%9A%E6%9C%89%E5%93%AA%E4%BA%9B%E5%9C%BA%E6%99%AF%E9%80%82%E5%90%88_flink_sql%EF%BC%9F\" title=\"4.1.\u573a\u666f\u95ee\u9898\uff1a\u6709\u54ea\u4e9b\u573a\u666f\u9002\u5408 flink sql\uff1f\">4.1.\u573a\u666f\u95ee\u9898\uff1a\u6709\u54ea\u4e9b\u573a\u666f\u9002\u5408 flink sql\uff1f<\/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%b57-%e4%b8%8d%e4%bc%9a%e8%bf%9e%e6%9c%80%e9%80%82%e5%90%88-flink-sql-%e7%9a%84-etl-%e5%92%8c-group-agg-%e5%9c%ba\/#42%E8%AF%AD%E6%B3%95%E8%BF%90%E8%A1%8C%E9%97%AE%E9%A2%98\" title=\"4.2.\u8bed\u6cd5\\\u8fd0\u884c\u95ee\u9898\">4.2.\u8bed\u6cd5\\\u8fd0\u884c\u95ee\u9898<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><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%b57-%e4%b8%8d%e4%bc%9a%e8%bf%9e%e6%9c%80%e9%80%82%e5%90%88-flink-sql-%e7%9a%84-etl-%e5%92%8c-group-agg-%e5%9c%ba\/#421ETL\" title=\"4.2.1.ETL\">4.2.1.ETL<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><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%b57-%e4%b8%8d%e4%bc%9a%e8%bf%9e%e6%9c%80%e9%80%82%e5%90%88-flink-sql-%e7%9a%84-etl-%e5%92%8c-group-agg-%e5%9c%ba\/#422%E5%8E%BB%E9%87%8D%E5%9C%BA%E6%99%AF\" title=\"4.2.2.\u53bb\u91cd\u573a\u666f\">4.2.2.\u53bb\u91cd\u573a\u666f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><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%b57-%e4%b8%8d%e4%bc%9a%e8%bf%9e%e6%9c%80%e9%80%82%e5%90%88-flink-sql-%e7%9a%84-etl-%e5%92%8c-group-agg-%e5%9c%ba\/#423group_%E8%81%9A%E5%90%88%E5%9C%BA%E6%99%AF\" title=\"4.2.3.group \u805a\u5408\u573a\u666f\">4.2.3.group \u805a\u5408\u573a\u666f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><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%b57-%e4%b8%8d%e4%bc%9a%e8%bf%9e%e6%9c%80%e9%80%82%e5%90%88-flink-sql-%e7%9a%84-etl-%e5%92%8c-group-agg-%e5%9c%ba\/#4231%E7%AE%80%E5%8D%95%E8%81%9A%E5%90%88%E5%9C%BA%E6%99%AF\" title=\"4.2.3.1.\u7b80\u5355\u805a\u5408\u573a\u666f\">4.2.3.1.\u7b80\u5355\u805a\u5408\u573a\u666f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><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%b57-%e4%b8%8d%e4%bc%9a%e8%bf%9e%e6%9c%80%e9%80%82%e5%90%88-flink-sql-%e7%9a%84-etl-%e5%92%8c-group-agg-%e5%9c%ba\/#4232%E5%8E%BB%E9%87%8D%E8%81%9A%E5%90%88%E5%9C%BA%E6%99%AF\" title=\"4.2.3.2.\u53bb\u91cd\u805a\u5408\u573a\u666f\">4.2.3.2.\u53bb\u91cd\u805a\u5408\u573a\u666f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><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%b57-%e4%b8%8d%e4%bc%9a%e8%bf%9e%e6%9c%80%e9%80%82%e5%90%88-flink-sql-%e7%9a%84-etl-%e5%92%8c-group-agg-%e5%9c%ba\/#4233%E8%AF%AD%E6%B3%95%E7%B3%96\" title=\"4.2.3.3.\u8bed\u6cd5\u7cd6\">4.2.3.3.\u8bed\u6cd5\u7cd6<\/a><\/li><\/ul><\/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%b57-%e4%b8%8d%e4%bc%9a%e8%bf%9e%e6%9c%80%e9%80%82%e5%90%88-flink-sql-%e7%9a%84-etl-%e5%92%8c-group-agg-%e5%9c%ba\/#5%E6%80%BB%E7%BB%93%E4%B8%8E%E5%B1%95%E6%9C%9B%E7%AF%87\" title=\"5.\u603b\u7ed3\u4e0e\u5c55\u671b\u7bc7\">5.\u603b\u7ed3\u4e0e\u5c55\u671b\u7bc7<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1%E5%BA%8F%E7%AF%87-%E6%9C%AC%E6%96%87%E7%BB%93%E6%9E%84\"><\/span>1.\u5e8f\u7bc7-\u672c\u6587\u7ed3\u6784<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u524d\u9762\u7684\u7ae0\u8282\u94fa\u57ab\u4e86\u90a3\u4e48\u591a\uff0c\u7ec8\u4e8e\u5728\u672c\u8282\u8d70\u5165\u4e00\u6761 query \u4e86\u3002<\/p>\n\n\n\n<p>\u9488\u5bf9 datastream api \u5927\u5bb6\u90fd\u6bd4\u8f83\u719f\u6089\u4e86\uff0c\u8fd8\u662f\u90a3\u53e5\u8bdd\uff0c\u5728 datastream \u4e2d\uff0c\u4f60\u5199\u7684\u4ee3\u7801\u903b\u8f91\u662f\u4ec0\u4e48\u6837\u7684\uff0c\u5b83\u6700\u7ec8\u7684\u6267\u884c\u65b9\u5f0f\u5c31\u662f\u4ec0\u4e48\u6837\u7684\u3002<\/p>\n\n\n\n<p>\u4f46\u662f\u5bf9\u4e8e flink sql \u7684\u6267\u884c\u8fc7\u7a0b\uff0c\u5927\u5bb6\u8fd8\u662f\u4e0d\u719f\u6089\u7684\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\u672c\u6587\u901a\u8fc7\u4ee5\u4e0b\u7ae0\u8282\u4f7f\u7528 ETL\uff0cgroup agg\uff08sum\uff0ccount\u7b49\uff09\u7b80\u5355\u805a\u5408\u7c7b query \u5e26\u5927\u5bb6\u8d70\u8fdb\u4e00\u6761 flink sql query \u903b\u8f91\u7684\u4e16\u754c\u3002\u5e2e\u5927\u5bb6\u81f3\u5c11\u80fd\u591f\u719f\u6089\u5728 flink sql \u7a0b\u5e8f\u8fd0\u884c\u65f6\u77e5\u9053 flink \u7a0b\u5e8f\u5728\u5e72\u4ec0\u4e48\u3002<\/p>\n\n\n\n<ol>\n<li>\u80cc\u666f\u7bc7-\u5927\u5bb6\u4e0d\u4e86\u89e3 flink sql \u4ec0\u4e48\uff1f<\/li>\n\n\n\n<li>\u76ee\u6807\u7bc7-\u672c\u6587\u80fd\u5e2e\u52a9\u5927\u5bb6\u4e86\u89e3 flink sql \u4ec0\u4e48\uff1f<\/li>\n\n\n\n<li>\u5b9e\u6218\u7bc7-\u7b80\u5355\u7684 query \u6848\u4f8b\u548c\u8fd0\u884c\u539f\u7406<\/li>\n\n\n\n<li>\u603b\u7ed3\u4e0e\u5c55\u671b\u7bc7<\/li>\n<\/ol>\n\n\n\n<p><strong>\u5148\u8bf4\u8bf4\u7ed3\u8bba\uff1a<\/strong><\/p>\n\n\n\n<ol>\n<li><strong>\u573a\u666f\u95ee\u9898<\/strong>\uff1aflink sql \u5f88\u9002\u5408\u7b80\u5355 ETL\uff0c\u4ee5\u53ca\u57fa\u672c\u5168\u90e8\u573a\u666f\u4e0b\u7684\u805a\u5408\u7c7b\u6307\u6807\u3002<\/li>\n\n\n\n<li><strong>\u8bed\u6cd5\u95ee\u9898<\/strong>\uff1aflink sql \u8bed\u6cd5\u5176\u5b9e\u662f\u548c\u5176\u4ed6 sql \u8bed\u6cd5\u57fa\u672c\u4e00\u81f4\u7684\u3002\u57fa\u672c\u4e0d\u4f1a\u4ea7\u751f\u8bed\u6cd5\u95ee\u9898\u963b\u788d\u4f7f\u7528 flink sql\u3002<\/li>\n\n\n\n<li><strong>\u8fd0\u884c\u95ee\u9898<\/strong>\uff1a\u67e5\u770b flink sql \u4efb\u52a1\u65f6\u7684\u4e00\u4e9b\u6280\u5de7\uff1a<\/li>\n<\/ol>\n\n\n\n<ul>\n<li>\u53bb flink webui \u770b\u770b\u8fd9\u4e2a\u4efb\u52a1\u76ee\u524d\u5728\u505a\u4ec0\u4e48\u3002\u5305\u62ec\u7b97\u5b50\u540d\u79f0\u90fd\u4f1a\u7ed9\u76f4\u63a5\u5c55\u793a\u7ed9\u6211\u4eec\u76ee\u524d\u54ea\u4e2a\u7b97\u5b50\u5728\u5e72\u5565\u4e8b\u60c5\uff0c\u5728\u5904\u7406\u5565\u903b\u8f91\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u4f60\u60f3\u77e5\u9053\u4f60\u7684 flink \u4efb\u52a1\u6267\u884c\u4e86\u4ec0\u4e48\u4ee3\u7801\uff0c\u5c31\u53bb\u770b\u770b sql \u6700\u540e\u8f6c\u6362\u6210\u7684 transformation \u91cc\u9762\u5177\u4f53\u8981\u6267\u884c\u54ea\u4e9b\u64cd\u4f5c\u3002flink sql \u751f\u6210\u7684\u4ee3\u7801\u4e5f\u5728\u91cc\u9762\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u4f60\u4e0d\u786e\u5b9a\u7ebf\u4e0a\u4efb\u52a1\u6267\u884c\u539f\u7406\uff0c\u53ef\u4ee5\u76f4\u63a5\u5728\u672c\u5730\u5c1d\u8bd5\u8fd0\u884c\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2%E8%83%8C%E6%99%AF%E7%AF%87-%E5%A4%A7%E5%AE%B6%E4%B8%8D%E4%BA%86%E8%A7%A3_flink_sql_%E4%BB%80%E4%B9%88%EF%BC%9F\"><\/span>2.\u80cc\u666f\u7bc7-\u5927\u5bb6\u4e0d\u4e86\u89e3 flink sql \u4ec0\u4e48\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u9996\u5148\u4ece\u5927\u5bb6\u7528 flink sql \u7684\u4e00\u4e2a\u521d\u8877\u548c\u72b6\u6001\u51fa\u53d1\uff0c\u60f3\u4e00\u4e0b\u5927\u5bb6\u5728\u5f00\u59cb\u4e0a\u624b flink sql \u65f6\uff0c\u662f\u4ec0\u4e48\u6837\u7684\u4e00\u4e2a\u60f3\u6cd5\uff1f<\/p>\n\n\n\n<p>\u535a\u4e3b\u5927\u6982\u6574\u7406\u4e86\u4e0b\uff0c\u5728\u521d\u6b65\u4e0a\u624b flink sql\uff0c\u4e00\u822c\u4ece\u5165\u624b\u5230\u8e29\u5751\u6574\u4e2a\u8fc7\u7a0b\u4e2d\uff0c\u4e00\u822c\u90fd\u4f1a\u6709\u4ee5\u4e0b\u51e0\u79cd\u95ee\u9898\u6216\u8005\u60f3\u6cd5\uff1a<\/p>\n\n\n\n<ol>\n<li><strong>\u573a\u666f\u95ee\u9898<\/strong>\uff1a\u9996\u5148 flink sql \u662f\u7528\u6765\u63d0\u6548\u7684\uff0c\u90a3\u76f8\u6bd4 datastream\uff0c\u54ea\u4e9b\u573a\u666f\u5f88\u9002\u5408 flink sql \u53bb\u505a\uff1f<\/li>\n\n\n\n<li><strong>\u8bed\u6cd5\u95ee\u9898<\/strong>\uff1a\u6211\u5199 sql \u65f6 flink sql \u8bed\u6cd5\u4f1a\u4e0d\u4f1a\u548c\u5176\u4ed6 sql \u8bed\u6cd5\u6709\u4e0d\u540c\uff1f<\/li>\n\n\n\n<li><strong>\u8fd0\u884c\u95ee\u9898<\/strong>\uff1a\u6211\u5199\u4e86\u4e00\u6761 sql\uff0c\u8fd0\u884c\u8d77\u6765\u4e86\uff0c\u4f46\u662f\u5bf9\u6211\u6765\u8bf4\u662f\u9ed1\u76d2\u7684\uff0c\u6211\u600e\u4e48\u77e5\u9053\u8fd9\u4e2a\u4efb\u52a1\u6b63\u5728\u6267\u884c\u4ec0\u4e48\u64cd\u4f5c\uff1f\u6709\u6ca1\u6709\u4ec0\u4e48\u597d\u529e\u6cd5\u5e2e\u6211\u53bb\u7406\u89e3 flink sql \u7684\u8fd0\u884c\u673a\u5236\uff1f<\/li>\n\n\n\n<li><strong>\u7406\u89e3\u8bef\u533a<\/strong>\uff1a\u5728\u7406\u89e3 flink sql \u7684\u8fd0\u7b97\u673a\u5236\u4e0a\u6709\u54ea\u4e9b\u8bef\u533a\uff1f<\/li>\n\n\n\n<li><strong>\u5751<\/strong>\uff1aflink sql \u4e00\u822c\u90fd\u6709\u5565\u5751\uff1f\u63d0\u524d\u4e86\u89e3\u5e2e\u6211\u4eec\u907f\u514d\u8e29\u5751\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u5c31\u662f\u4e0a\u9762\u8fd9\u4e9b\u60f3\u6cd5\uff0c\u4f1a\u8ba9\u5f88\u591a\u60f3\u5728\u516c\u53f8\u5185\u90e8\u5f15\u5165 flink sql \u7684\u540c\u5b66\u671b\u800c\u5374\u6b65\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3%E7%9B%AE%E6%A0%87%E7%AF%87-%E6%9C%AC%E6%96%87%E8%83%BD%E5%B8%AE%E5%8A%A9%E5%A4%A7%E5%AE%B6%E4%BA%86%E8%A7%A3_flink_sql_%E4%BB%80%E4%B9%88%EF%BC%9F\"><\/span>3.\u76ee\u6807\u7bc7-\u672c\u6587\u80fd\u5e2e\u52a9\u5927\u5bb6\u4e86\u89e3 flink sql \u4ec0\u4e48\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u6765\u770b\u770b\u672c\u6587\u7684\u76ee\u6807\uff1a<\/p>\n\n\n\n<ol>\n<li><strong>\u573a\u666f\u95ee\u9898\uff1a\u5e2e\u5927\u5bb6\u7406\u89e3\u54ea\u4e9b\u573a\u666f\u662f\u975e\u5e38\u9002\u5408 flink sql \u7684<\/strong><\/li>\n\n\n\n<li><strong>\u8bed\u6cd5\u95ee\u9898\uff1a\u5e2e\u5927\u5bb6\u7b80\u5355\u719f\u6089 flink sql \u7684\u8bed\u6cd5<\/strong><\/li>\n\n\n\n<li><strong>\u8fd0\u884c\u95ee\u9898\uff1a\u4f7f\u7528\u4e00\u6761\u7b80\u5355\u7684 query sql \u770b\u770b\u5176\u8fd0\u884c\u8d77\u6765\u7684\u8fc7\u7a0b\uff0c\u5176\u8fd0\u884c\u7684\u673a\u5236<\/strong><\/li>\n\n\n\n<li>\u7406\u89e3\u8bef\u533a\uff1a\u8fd0\u7b97\u673a\u5236\u4e0a\u7684\u5e38\u89c1\u8bef\u533a<\/li>\n\n\n\n<li>\u5751\uff1a\u770b\u770b sql \u4e00\u822c\u4f1a\u6709\u5565\u5751<\/li>\n<\/ol>\n\n\n\n<p>\u7531\u4e8e\u4e00\u7bc7\u6587\u7ae0\u4e0d\u80fd\u8986\u76d6\u6240\u6709\u6982\u5ff5\uff0c\u672c\u6587\u4e3b\u8981\u4ecb\u7ecd\u4e00\u4e9b\u6700\u7b80\u5355\u7684 ETL\uff0c\u805a\u5408\u573a\u666f\uff0c\u4e3b\u8981\u96c6\u4e2d\u4e8e\u524d\u4e09\u70b9\u3002<\/p>\n\n\n\n<p>\u540e\u4e24\u70b9\u5728\u540e\u7eed\u7cfb\u5217\u6587\u7ae0\u4e2d\u4f1a\u6309\u7167\u573a\u666f\u8be6\u7ec6\u5c55\u5f00\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4%E5%AE%9E%E6%88%98%E7%AF%87-%E7%AE%80%E5%8D%95%E7%9A%84_query_%E6%A1%88%E4%BE%8B%E5%92%8C%E8%BF%90%E8%A1%8C%E5%8E%9F%E7%90%86\"><\/span>4.\u5b9e\u6218\u7bc7-\u7b80\u5355\u7684 query \u6848\u4f8b\u548c\u8fd0\u884c\u539f\u7406<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"41%E5%9C%BA%E6%99%AF%E9%97%AE%E9%A2%98%EF%BC%9A%E6%9C%89%E5%93%AA%E4%BA%9B%E5%9C%BA%E6%99%AF%E9%80%82%E5%90%88_flink_sql%EF%BC%9F\"><\/span>4.1.\u573a\u666f\u95ee\u9898\uff1a\u6709\u54ea\u4e9b\u573a\u666f\u9002\u5408 flink sql\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u4e0d\u88c5\u4e86\uff0c\u6211\u5766\u767d\u4e86\uff0cflink sql \u5176\u5b9e\u5f88\u9002\u5408\u5e72\u7684\u6d3b\u5c31\u662f dwd \u6e05\u6d17\uff0cdws \u805a\u5408\u3002<\/p>\n\n\n\n<p>\u6b64\u5904\u4e3b\u8981\u9488\u5bf9\u5b9e\u65f6\u6570\u4ed3\u7684\u573a\u666f\u6765\u8bf4\u3002flink sql \u80fd\u5e72 dwd \u6e05\u6d17\uff0cdws \u805a\u5408\uff0c\u57fa\u672c\u4e0a\u5b9e\u65f6\u6570\u4ed3\u7684\u5927\u591a\u6570\u573a\u666f\u90fd\u80fd\u7ed9\u8986\u76d6\u4e86\u3002<\/p>\n\n\n\n<p>flink sql \u725b\u903c\uff01\uff01\uff01<\/p>\n\n\n\n<p>\u4f46\u662f\uff01\uff01\uff01<\/p>\n\n\n\n<p>\u7ecf\u8fc7\u535a\u4e3b\u4f7f\u7528 flink sql \u7ecf\u9a8c\u6765\u770b\uff0c\u5e76\u4e0d\u662f\u6240\u6709\u7684 dwd\uff0cdws \u805a\u5408\u573a\u666f\u90fd\u9002\u5408 flink sql\uff08\u622a\u6b62\u53d1\u6587\u9636\u6bb5\u6765\u8bf4\uff09\uff01\uff01\uff01<\/p>\n\n\n\n<p>\u5176\u5b9e\u8fd9\u4e9b\u76ee\u524d\u4e0d\u9002\u5408 flink sql \u7684\u573a\u666f\u603b\u7ed3\u4e0b\u6765\u5c31\u662f\u5728\u5904\u7406\u4e0a\u6bd4 datastream \u8fd8\u662f\u4f1a\u6709\u4e00\u5b9a\u7684\u635f\u5931\u3002<\/p>\n\n\n\n<p>\u5148\u603b\u7ed3\u4e0b\u4f7f\u7528\u573a\u666f\uff1a<\/p>\n\n\n\n<p><strong>1. dwd<\/strong>\uff1a\u7b80\u5355\u7684\u6e05\u6d17\u3001\u590d\u6742\u7684\u6e05\u6d17\u3001\u7ef4\u5ea6\u7684\u6269\u5145\u3001\u5404\u79cd udf \u7684\u4f7f\u7528<\/p>\n\n\n\n<p><strong>2. dws<\/strong>\uff1a\u5404\u7c7b\u805a\u5408<\/p>\n\n\n\n<p>\u7136\u540e\u5206\u9002\u5408\u7684\u573a\u666f\u548c\u4e0d\u9002\u5408\u7684\u573a\u666f\u6765\u8bf4\uff0c\u56e0\u4e3a\u53ea\u8fd9\u4e00\u7bc7\u4e0d\u80fd\u8986\u76d6\u6240\u6709\u7684\u5185\u5bb9\uff0c\u6240\u4ee5\u672c\u6587\u6b64\u5904\u5148\u5927\u81f4\u7ed9\u4e2a\u7ed3\u8bba\uff0c\u4e4b\u540e\u4f1a\u7ed3\u5408\u5177\u4f53\u7684\u573a\u666f\u8be6\u7ec6\u63cf\u8ff0\u3002<\/p>\n\n\n\n<ul>\n<li><strong>\u9002\u5408\u7684\u573a\u666f\uff1a<\/strong><\/li>\n<\/ul>\n\n\n\n<ol>\n<li>\u7b80\u5355\u7684 dwd \u6e05\u6d17\u573a\u666f<\/li>\n\n\n\n<li>\u5168\u573a\u666f\u7684 dws \u805a\u5408\u573a\u666f<\/li>\n<\/ol>\n\n\n\n<ul>\n<li><strong>\u76ee\u524d\u4e0d\u592a\u9002\u5408\u7684\u573a\u666f\uff1a<\/strong><\/li>\n<\/ul>\n\n\n\n<ol>\n<li>\u590d\u6742\u7684 dwd \u6e05\u6d17\u573a\u666f\uff1a\u4e3e\u4f8b\u6bd4\u5982\u4f7f\u7528\u4e86\u5f88\u591a udf \u6e05\u6d17\uff0c\u5c24\u5176\u662f\u4f7f\u7528\u5f88\u591a\u7684 json \u7c7b\u89e3\u6790\u6e05\u6d17<\/li>\n\n\n\n<li>\u5173\u8054\u7ef4\u5ea6\u573a\u666f\uff1a\u4e3e\u4f8b\u6bd4\u5982 datastream \u4e2d\u7ecf\u5e38\u4f1a\u6709\u6512\u4e00\u6279\u6570\u636e\u6279\u91cf\u8bbf\u95ee\u5916\u90e8\u63a5\u53e3\u7684\u573a\u666f\uff0cflink sql \u76ee\u524d\u5bf9\u4e8e\u8fd9\u79cd\u573a\u666f\u867d\u7136\u6709 localcache\u3001\u5f02\u6b65\u8bbf\u95ee\u80fd\u529b\uff0c\u4f46\u662f\u4f9d\u7136\u8fd8\u662f\u4e00\u6761\u4e00\u6761\u8bbf\u95ee\u5916\u90e8\u7f13\u5b58\uff0c\u8fd9\u6837\u76f8\u6bd4\u6279\u91cf\u8bbf\u95ee\u8fd8\u662f\u4f1a\u6709\u6027\u80fd\u5dee\u8ddd\u3002<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"42%E8%AF%AD%E6%B3%95%E8%BF%90%E8%A1%8C%E9%97%AE%E9%A2%98\"><\/span>4.2.\u8bed\u6cd5\\\u8fd0\u884c\u95ee\u9898<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u5176\u5b9e\u603b\u7ed3\u6765\u8bf4\uff0c\u5bf9\u4e8e\u63a5\u89e6\u8fc7 sql \u7684\u540c\u5b66\u6765\u8bf4\uff0c\u9664\u4e86 flink sql \u4e2d\u7a97\u53e3\u805a\u5408\u7c7b\u7684\u5199\u6cd5\u6765\u8bf4\uff0c\u5176\u4ed6\u7684 sql \u8bed\u6cd5\u90fd\u662f\u76f8\u540c\u7684\uff0c\u5f88\u5bb9\u6613\u7406\u89e3\u3002<\/p>\n\n\n\n<p>\u672c\u8282\u4f1a\u9488\u5bf9\u5177\u4f53\u7684\u6848\u4f8b\u8fdb\u884c\u8be6\u7ec6\u4ecb\u7ecd\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"421ETL\"><\/span>4.2.1.ETL<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u6700\u7b80\u5355\u7684 ETL \u7c7b\u578b\u4efb\u52a1\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT select_list FROM table_expression &#91; WHERE boolean_expression ]\n<\/code><\/pre>\n\n\n\n<p><strong>1.\u573a\u666f\uff1a\u7b80\u5355\u7684 dwd \u6e05\u6d17\u8fc7\u6ee4\u573a\u666f<\/strong><\/p>\n\n\n\n<p>\u6e90\u7801\u516c\u4f17\u53f7\u540e\u53f0\u56de\u590d<strong>\u4e0d\u4f1a\u8fde\u6700\u9002\u5408 flink sql \u7684 ETL \u548c group agg \u573a\u666f\u90fd\u6ca1\u89c1\u8fc7\u5427<\/strong>\u83b7\u53d6\u3002<\/p>\n\n\n\n<p>\u6570\u636e\u6e90\u8868\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE source_table (\n    order_number BIGINT,\n    price        DECIMAL(32,2)\n) WITH (\n  'connector' = 'datagen',\n  'rows-per-second' = '10',\n  'fields.order_number.min' = '10',\n  'fields.order_number.max' = '11'\n)\n<\/code><\/pre>\n\n\n\n<p>\u6570\u636e\u6c47\u8868\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE sink_table (\n    order_number BIGINT,\n    price        DECIMAL(32,2)\n) WITH (\n  'connector' = 'print'\n)\n<\/code><\/pre>\n\n\n\n<p>ETL \u903b\u8f91\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>insert into sink_table\nselect * from source_table\nwhere order_number = 10\n<\/code><\/pre>\n\n\n\n<p><strong>2.\u8fd0\u884c\uff1a\u53ef\u4ee5\u770b\u5230\uff0c\u5176\u5b9e\u5728 flink sql \u4efb\u52a1\u4e2d\uff0c\u5176\u4f1a\u628a\u5bf9\u5e94\u7684\u5904\u7406\u903b\u8f91\u7ed9\u5199\u5230\u7b97\u5b50\u540d\u79f0\u4e0a\u9762\u3002<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote\">\n<p><strong>Notes &#8211; \u89c2\u5bdf flink sql \u6280\u5de7 1\uff1a<\/strong><br>\u8fd9\u4e2a\u5176\u5b9e\u5c31\u662f\u6211\u4eec\u89c2\u5bdf flink sql \u4efb\u52a1\u7684\u7b2c\u4e00\u4e2a\u6280\u5de7\u3002\u5982\u679c\u4f60\u60f3\u77e5\u9053\u4f60\u7684 flink \u4efb\u52a1\u5728\u5e72\u5565\uff0c\u7b2c\u4e00\u53cd\u5e94\u662f\u53bb flink webui \u770b\u770b\u8fd9\u4e2a\u4efb\u52a1\u76ee\u524d\u5728\u505a\u4ec0\u4e48\u3002\u5305\u62ec\u7b97\u5b50\u540d\u79f0\u90fd\u4f1a\u7ed9\u76f4\u63a5\u5c55\u793a\u7ed9\u6211\u4eec\u76ee\u524d\u54ea\u4e2a\u7b97\u5b50\u5728\u5e72\u5565\u4e8b\u60c5\uff0c\u5728\u5904\u7406\u5565\u903b\u8f91<\/p>\n<\/blockquote>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic3.zhimg.com\/80\/v2-180ad1173d1cb0bba9717d40801ea3ae_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>5<\/p>\n\n\n\n<p><strong>3.\u7ed3\u679c<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>+I&#91;10, 337546916355686018150362513408.00]\n+I&#91;10, 734895198061906189720381030400.00]\n+I&#91;10, 496632591763800912960818249728.00]\n+I&#91;10, 495090465926828588045441171456.00]\n+I&#91;10, 167305033642317182838130081792.00]\n+I&#91;10, 409466913112794578407573684224.00]\n+I&#91;10, 894352160414515330502514180096.00]\n+I&#91;10, 680063350384451712068576346112.00]\n+I&#91;10, 50807402446574997641386524672.00]\n+I&#91;10, 646597093362022945955245981696.00]\n+I&#91;10, 233317961584082024331537809408.00]\n...\n<\/code><\/pre>\n\n\n\n<p><strong>4.\u539f\u7406\uff1a<\/strong><\/p>\n\n\n\n<p>\u5148\u770b\u4e00\u4e0b\u4e00\u4e2a flink sql \u4efb\u52a1\u7684\u5165\u53e3\u6267\u884c\u903b\u8f91\u3002<\/p>\n\n\n\n<p>\u9996\u5148\u770b\u770b\u5efa\u8868\u8bed\u53e5\u7684\u6267\u884c\u548c query \u8bed\u53e5\u6267\u884c\u7684\u903b\u8f91\u6709\u4ec0\u4e48\u4e0d\u540c\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic3.zhimg.com\/80\/v2-03c13b58df8bad81e3c6fbcc8861de62_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic4.zhimg.com\/80\/v2-6cfd7c45289903765e9dadd87d0fe977_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u53ef\u4ee5\u53d1\u73b0\u6267\u884c\u5230&nbsp;<code>executeInternal<\/code>&nbsp;\u65f6\u4f1a\u9488\u5bf9\u5177\u4f53\u7684&nbsp;<code>operation<\/code>&nbsp;\u6765\u6267\u884c\u4e0d\u540c\u7684\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p>\u6267\u884c\u5efa\u8868\u64cd\u4f5c\u5c31\u662f\u5177\u4f53\u7684&nbsp;<code>CreateTableOperation<\/code>&nbsp;\u65f6\uff0c\u4f1a\u5c06\u8868\u7684\u4fe1\u606f\u4fdd\u5b58\u5230&nbsp;<code>catalogManager<\/code>\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic3.zhimg.com\/80\/v2-2fa64ba23426023fffc388178beb5a06_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>8<\/p>\n\n\n\n<p>\u6267\u884c query \u64cd\u4f5c\u5c31\u662f\u5177\u4f53\u7684&nbsp;<code>ModifyOperation<\/code>&nbsp;\u65f6\uff0c\u4f1a\u5c06\u5bf9\u5e94\u7684\u903b\u8f91\u8f6c\u6362\u6210\u5bf9\u5e94\u7684&nbsp;<code>Transformation<\/code>\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic3.zhimg.com\/80\/v2-4538b2bcbdeaa37eb132ab154e153662_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>9<\/p>\n\n\n\n<p><code>Transformation<\/code>&nbsp;\u4e2d\u5c31\u5305\u542b\u4e86\u6267\u884c\u7684\u6574\u4f53\u903b\u8f91\u4ee5\u53ca\u5bf9\u5e94\u8981\u6267\u884c\u7684 sql \u4ee3\u7801\u5185\u5bb9\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic1.zhimg.com\/80\/v2-cb248597a2c0aa2206c035065ac5a780_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>10<\/p>\n\n\n\n<p>\u63a5\u4e0b\u6765\u6211\u4eec\u8be6\u7ec6\u770b\u4e0b\u5bf9\u5e94\u7684 transform \u4e2d\u5305\u542b\u4e86\u4ec0\u4e48\u5185\u5bb9\u3002<\/p>\n\n\n\n<p>\u9996\u5148\u662f\u6700\u5916\u5c42&nbsp;<code>LegacySinkTransformation<\/code>\uff0c\u5373 sink \u7b97\u5b50\uff0c\u5982\u56fe\u5c31\u662f print sink function\u3002\u6bd4\u8f83\u597d\u7406\u89e3\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic4.zhimg.com\/80\/v2-4fd2f52d185542f00c3dd6dba8b116e7_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>11<\/p>\n\n\n\n<p>\u7136\u540e\u662f\u4e2d\u95f4\u5c42&nbsp;<code>OneInputTransformation<\/code>\uff0c\u5373 sql \u4e2d\u8fc7\u6ee4\u548c\u8f6c\u6362\u64cd\u4f5c\uff08<code>select * from source_table where order_number = 10<\/code>\uff09\uff0c\u5982\u56fe\u662f\u4ee3\u7801\u751f\u6210\u7684\u5177\u4f53\u8fc7\u6ee4\u548c\u8f6c\u6362\u903b\u8f91\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic2.zhimg.com\/80\/v2-d42893bb75903e92c5a2d7aa9a75af11_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>12<\/p>\n\n\n\n<p>\u751f\u6210\u7684\u4ee3\u7801\u5c31\u5728&nbsp;<code>GeneratedOperator<\/code>&nbsp;\u4e2d\u7684&nbsp;<code>code<\/code>&nbsp;\u5b57\u6bb5\u3002\u6211\u4eec\u5c06\u5bf9\u5e94\u7684&nbsp;<code>code<\/code>&nbsp;\u590d\u5236\u5230\u4e00\u4e2a\u65b0\u7684\u6587\u4ef6\u5939\u4e2d\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic1.zhimg.com\/80\/v2-bbea27ad233ccc81d72d322f634efc20_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>13<\/p>\n\n\n\n<p>\u8fd9\u4e2a\u7b97\u5b50\u662f\u76f4\u63a5\u7ee7\u627f\u4e86&nbsp;<code>OneInputStreamOperator<\/code>&nbsp;\u8fdb\u884c\u76f4\u63a5\u6267\u884c\u903b\u8f91\uff0c\u8df3\u8fc7\u4e86 datastream \u90a3\u4e00\u5c42\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic4.zhimg.com\/80\/v2-fecf9bec98b23707cf265f466ab46f0f_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>14<\/p>\n\n\n\n<p>\u6211\u4eec\u6765\u770b\u770b\u6700\u91cd\u8981\u7684&nbsp;<code>processElement<\/code>&nbsp;\u903b\u8f91\uff0c\u5177\u4f53\u5b57\u6bb5\u89e3\u91ca\u548c\u6267\u884c\u903b\u8f91\u5982\u56fe\u6240\u793a\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic3.zhimg.com\/80\/v2-eef7f1380cd545c2388c010b83d5cd42_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic4.zhimg.com\/80\/v2-709bd8a50c67ebf0b6c61b053be3dc5f_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote\">\n<p><strong>Notes &#8211; \u89c2\u5bdf flink sql \u6280\u5de7 2\uff1a<\/strong><br>\u8fd9\u4e2a\u5176\u5b9e\u5c31\u662f\u6211\u4eec\u89c2\u5bdf flink sql \u4efb\u52a1\u7684\u7b2c\u4e8c\u4e2a\u6280\u5de7\u3002\u5982\u679c\u4f60\u60f3\u77e5\u9053\u4f60\u7684 flink \u4efb\u52a1\u6267\u884c\u4e86\u4ec0\u4e48\u4ee3\u7801\uff0c\u5c31\u53bb\u770b\u770b sql \u6700\u540e\u8f6c\u6362\u6210\u7684 transformation \u91cc\u9762\u5177\u4f53\u8981\u6267\u884c\u54ea\u4e9b\u64cd\u4f5c\u3002<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"422%E5%8E%BB%E9%87%8D%E5%9C%BA%E6%99%AF\"><\/span>4.2.2.\u53bb\u91cd\u573a\u666f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>1.\u573a\u666f\uff1a\u6700\u7b80\u5355\u7684\u53bb\u91cd\u573a\u666f<\/strong><\/p>\n\n\n\n<p>\u6e90\u7801\u516c\u4f17\u53f7\u540e\u53f0\u56de\u590d<strong>\u4e0d\u4f1a\u8fde\u6700\u9002\u5408 flink sql \u7684 ETL \u548c group agg \u573a\u666f\u90fd\u6ca1\u89c1\u8fc7\u5427<\/strong>\u83b7\u53d6\u3002<\/p>\n\n\n\n<p>\u6570\u636e\u6e90\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE source_table (\n    string_field STRING\n) WITH (\n  'connector' = 'datagen',\n  'rows-per-second' = '10',\n  'fields.string_field.length' = '3'\n)\n<\/code><\/pre>\n\n\n\n<p>\u6570\u636e\u6c47\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE sink_table (\n    string_field STRING\n) WITH (\n  'connector' = 'print'\n)\n<\/code><\/pre>\n\n\n\n<p>\u6570\u636e\u5904\u7406\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>insert into sink_table\nselect distinct string_field\nfrom source_table\n<\/code><\/pre>\n\n\n\n<p><strong>2.\u8fd0\u884c\uff1a\u53ef\u4ee5\u770b\u5230\uff0c\u5176\u5b9e\u5728 flink sql \u4efb\u52a1\u4e2d\uff0c\u5176\u4f1a\u628a\u5bf9\u5e94\u7684\u5904\u7406\u903b\u8f91\u7ed9\u5199\u5230\u7b97\u5b50\u540d\u79f0\u4e0a\u9762\u3002<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic3.zhimg.com\/80\/v2-5507ddb23467e843cc76e55c0875e64a_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>17<\/p>\n\n\n\n<p><strong>3.\u4e0a\u9762\u8fd9\u4e2a\u6848\u4f8b\u7684\u7ed3\u679c\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>+I&#91;cd3]\n+I&#91;8fc]\n+I&#91;b0c]\n+I&#91;1d8]\n+I&#91;e28]\n+I&#91;c5f]\n+I&#91;e7d]\n+I&#91;dfa]\n+I&#91;1fe]\n...\n<\/code><\/pre>\n\n\n\n<p><strong>4.\u539f\u7406\uff1a<\/strong><\/p>\n\n\n\n<p>\u6b64\u5904\u6211\u4eec\u53ea\u5173\u6ce8\u548c\u4e0a\u9762\u4e0d\u540c\u7684\u903b\u8f91\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e00\u4e2a\u5c31\u662f&nbsp;<code>PartitionTransform<\/code>&nbsp;\u4e2d\u7684&nbsp;<code>KeyGroupStreamPartitioner<\/code>\uff0c\u5c31\u662f\u5bf9\u5e94\u7684\u5206\u533a\u903b\u8f91\u3002\u6765\u770b\u770b\u751f\u6210\u4ee3\u7801\u7684\u903b\u8f91\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic1.zhimg.com\/80\/v2-27e8b11e284a8fd7c5226a9dd041b2cc_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic4.zhimg.com\/80\/v2-4267e8c73dc21d5b08bffc4d52b0c6ab_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u5176\u4e2d\u505a shuffle \u903b\u8f91\u65f6\uff0c\u662f\u6309\u7167&nbsp;<code>string_field<\/code>&nbsp;\u4f5c\u4e3a key \u8fdb\u884c shuffle\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e8c\u4e2a\u5c31\u662f&nbsp;<code>OneInputTransformation<\/code>&nbsp;\u4e2d\u7684&nbsp;<code>KeyedProcessOperator<\/code>\uff0c\u5c31\u662f\u5bf9\u5e94\u7684\u53bb\u91cd\u903b\u8f91\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic1.zhimg.com\/80\/v2-16d27f89de7591b1e57e6584fed7d5a0_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic4.zhimg.com\/80\/v2-3087ef5c8744634b3509304bae4e63bf_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic4.zhimg.com\/80\/v2-eabcb58581d0628ae2c8778a88443313_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic1.zhimg.com\/80\/v2-9efe89e55368dfdfb065f688c5a11da0_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u53ef\u4ee5\u770b\u5230\u751f\u6210\u7684 function \u4e2d\u53ea\u6709\u8fd9\u4e09\u6bb5\u4ee3\u7801\u662f\u4e1a\u52a1\u903b\u8f91\u4ee3\u7801\uff0c\u4f46\u662f\u5176\u4e2d\u7684 RowData \u521d\u59cb\u5316\u5927\u5c0f\u90fd\u662f 0\u3002\u90a3\u4e48\u5230\u5e95\u662f\u54ea\u91cc\u505a\u7684\u53bb\u91cd\u903b\u8f91\u5462\uff1f<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic1.zhimg.com\/80\/v2-c1cbbdbd2e9199bfdb66128679490964_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>24<\/p>\n\n\n\n<p>\u6211\u4eec\u8ddf\u4e00\u4e0b\u5904\u7406\u903b\u8f91\u4f1a\u53d1\u73b0\u3002\u53bb\u91cd\u903b\u8f91\u4e3b\u8981\u96c6\u4e2d\u5728&nbsp;<code>GroupAggFunction#processElement<\/code>\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic3.zhimg.com\/80\/v2-c13f786a970e18186841db17ab97416a_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>25<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"423group_%E8%81%9A%E5%90%88%E5%9C%BA%E6%99%AF\"><\/span>4.2.3.group \u805a\u5408\u573a\u666f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4231%E7%AE%80%E5%8D%95%E8%81%9A%E5%90%88%E5%9C%BA%E6%99%AF\"><\/span>4.2.3.1.\u7b80\u5355\u805a\u5408\u573a\u666f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>1.\u573a\u666f\uff1a\u6700\u7b80\u5355\u7684\u805a\u5408\u573a\u666f<\/strong><\/p>\n\n\n\n<p>\u6e90\u7801\u516c\u4f17\u53f7\u540e\u53f0\u56de\u590d<strong>\u4e0d\u4f1a\u8fde\u6700\u9002\u5408 flink sql \u7684 ETL \u548c group agg \u573a\u666f\u90fd\u6ca1\u89c1\u8fc7\u5427<\/strong>\u83b7\u53d6\u3002<\/p>\n\n\n\n<p>count\uff0csum\uff0cavg\uff0cmax\uff0cmin \u7b49\uff1a<\/p>\n\n\n\n<p>\u6570\u636e\u6e90\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE source_table (\n    order_id STRING,\n    price BIGINT\n) WITH (\n  'connector' = 'datagen',\n  'rows-per-second' = '10',\n  'fields.order_id.length' = '1',\n  'fields.price.min' = '1',\n  'fields.price.max' = '1000000'\n)\n<\/code><\/pre>\n\n\n\n<p>\u6570\u636e\u6c47\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE sink_table (\n    order_id STRING,\n    count_result BIGINT,\n    sum_result BIGINT,\n    avg_result DOUBLE,\n    min_result BIGINT,\n    max_result BIGINT\n) WITH (\n  'connector' = 'print'\n)\n<\/code><\/pre>\n\n\n\n<p>\u6570\u636e\u5904\u7406\u903b\u8f91\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>insert into sink_table\nselect order_id,\n       count(*) as count_result,\n       sum(price) as sum_result,\n       avg(price) as avg_result,\n       min(price) as min_result,\n       max(price) as max_result\nfrom source_table\ngroup by order_id\n<\/code><\/pre>\n\n\n\n<p><strong>2.\u8fd0\u884c\uff1a<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic2.zhimg.com\/80\/v2-10e9fd2afe988c3ee63b79287be5d7f1_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic2.zhimg.com\/80\/v2-7c22035d74308098f06de8e65f30393d_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p><strong>3.\u4e0a\u9762\u8fd9\u4e2a\u6848\u4f8b\u7684\u7ed3\u679c\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>+I&#91;1, 1, 415300, 415300.0, 415300, 415300]\n+I&#91;d, 1, 416878, 416878.0, 416878, 416878]\n+I&#91;0, 1, 120837, 120837.0, 120837, 120837]\n+I&#91;c, 1, 337749, 337749.0, 337749, 337749]\n+I&#91;7, 1, 387053, 387053.0, 387053, 387053]\n+I&#91;8, 1, 387042, 387042.0, 387042, 387042]\n+I&#91;2, 1, 546317, 546317.0, 546317, 546317]\n+I&#91;e, 1, 22131, 22131.0, 22131, 22131]\n+I&#91;9, 1, 651731, 651731.0, 651731, 651731]\n-U&#91;0, 1, 120837, 120837.0, 120837, 120837]\n+U&#91;0, 2, 566664, 283332.0, 120837, 445827]\n+I&#91;b, 1, 748659, 748659.0, 748659, 748659]\n-U&#91;7, 1, 387053, 387053.0, 387053, 387053]\n+U&#91;7, 2, 1058056, 529028.0, 387053, 671003]\n<\/code><\/pre>\n\n\n\n<p><strong>4.\u539f\u7406\uff1a<\/strong><\/p>\n\n\n\n<p>\u6765\u7785\u4e00\u773c transformation\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic3.zhimg.com\/80\/v2-834f46e2211b6abca2c880d814c1b4de_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>28<\/p>\n\n\n\n<p>\u8fd8\u662f\u548c\u4e4b\u524d\u7684\u903b\u8f91\u4e00\u6837\uff0c\u8ddf\u4e00\u4e0b GroupAggFunction \u7684\u903b\u8f91\u3002\u5982\u4e0b\u56fe\uff0c\u6709\u4e94\u4e2a\u6267\u884c\u6b65\u9aa4\u6267\u884c\u8ba1\u7b97\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic4.zhimg.com\/80\/v2-31763d965111c975f16e0c8f59bc3b1f_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>33<\/p>\n\n\n\n<p>\u518d\u770b\u6700\u7ec8\u751f\u6210\u7684 function \u4ee3\u7801\u903b\u8f91\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic3.zhimg.com\/80\/v2-2ca5919de25f78e247c91721681043de_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>31<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic3.zhimg.com\/80\/v2-da529cbd1962d896b656cd0a8d01e8d6_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>29<\/p>\n\n\n\n<p>\u9996\u5148\u770b\u770b count \u600e\u4e48\u7b97\u7684\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic3.zhimg.com\/80\/v2-0eb136f57f1c1f30ae154f593406e78e_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>30<\/p>\n\n\n\n<p>sum \u600e\u4e48\u7b97\u7684\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic4.zhimg.com\/80\/v2-2359a94e7cd5140fce7715346b88abc7_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>32<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4232%E5%8E%BB%E9%87%8D%E8%81%9A%E5%90%88%E5%9C%BA%E6%99%AF\"><\/span>4.2.3.2.\u53bb\u91cd\u805a\u5408\u573a\u666f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>1.\u573a\u666f\uff1a\u53bb\u91cd\u805a\u5408\u573a\u666f<\/strong><\/p>\n\n\n\n<p>\u6570\u636e\u6e90\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE source_table (\n    dim STRING,\n    user_id BIGINT\n) WITH (\n  'connector' = 'datagen',\n  'rows-per-second' = '10',\n  'fields.dim.length' = '1',\n  'fields.user_id.min' = '1',\n  'fields.user_id.max' = '1000000'\n)\n<\/code><\/pre>\n\n\n\n<p>\u6570\u636e\u6c47\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE sink_table (\n    dim STRING,\n    uv BIGINT\n) WITH (\n  'connector' = 'print'\n)\n<\/code><\/pre>\n\n\n\n<p>\u6570\u636e\u5904\u7406\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>insert into sink_table\nselect dim,\n       count(distinct user_id) as uv\nfrom source_table\ngroup by dim\n<\/code><\/pre>\n\n\n\n<p><strong>2.\u8fd0\u884c\uff1a<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic1.zhimg.com\/80\/v2-70ddaf4339c9eff04f9da9a9f27bc564_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>35<\/p>\n\n\n\n<p><strong>3.\u4e0a\u9762\u8fd9\u4e2a\u6848\u4f8b\u7684\u7ed3\u679c\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>+U&#91;9, 3097]\n-U&#91;a, 3054]\n+U&#91;a, 3055]\n-U&#91;8, 3030]\n+U&#91;8, 3031]\n-U&#91;4, 3137]\n+U&#91;4, 3138]\n-U&#91;6, 3139]\n+U&#91;6, 3140]\n-U&#91;0, 3082]\n+U&#91;0, 3083]\n<\/code><\/pre>\n\n\n\n<p><strong>4.\u539f\u7406\uff1a<\/strong><\/p>\n\n\n\n<p>\u6b64\u5904\u53ea\u770b\u548c\u4e4b\u524d\u7684\u6848\u4f8b\u4e0d\u4e00\u6837\u7684\u5730\u65b9\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic3.zhimg.com\/80\/v2-ccec12728a8f8f5a7306220b3fbfb7e6_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic4.zhimg.com\/80\/v2-8f9ad37db295f5f514406b568c125ffb_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4233%E8%AF%AD%E6%B3%95%E7%B3%96\"><\/span>4.2.3.3.\u8bed\u6cd5\u7cd6<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>1.grouping sets<\/strong><\/p>\n\n\n\n<p>\u591a\u7ef4\u8ba1\u7b97\u3002\u76f8\u5f53\u4e8e\u8bed\u6cd5\u7cd6\uff0c\u7528\u6237\u53ef\u4ee5\u6839\u636e\u81ea\u5df1\u7684\u573a\u666f\u53bb\u6307\u5b9a\u81ea\u5df1\u60f3\u8981\u7684\u7ef4\u5ea6\u7ec4\u5408\u3002<\/p>\n\n\n\n<p>\u6570\u636e\u6c47\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE sink_table (\n    supplier_id STRING,\n    product_id STRING,\n    total BIGINT\n) WITH (\n  'connector' = 'print'\n)\n<\/code><\/pre>\n\n\n\n<p>\u6570\u636e\u5904\u7406\u903b\u8f91\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>insert into sink_table\nSELECT\n     supplier_id,\n     product_id,\n     COUNT(*) AS total\nFROM (VALUES\n     ('supplier1', 'product1', 4),\n     ('supplier1', 'product2', 3),\n     ('supplier2', 'product3', 3),\n     ('supplier2', 'product4', 4))\nAS Products(supplier_id, product_id, rating)\nGROUP BY GROUPING SETS ((supplier_id, product_id), (supplier_id), ())\n<\/code><\/pre>\n\n\n\n<p>\u5176\u7ed3\u679c\u7b49\u540c\u4e8e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>insert into sink_table\nSELECT\n     supplier_id,\n     product_id,\n     COUNT(*) AS total\nFROM (VALUES\n     ('supplier1', 'product1', 4),\n     ('supplier1', 'product2', 3),\n     ('supplier2', 'product3', 3),\n     ('supplier2', 'product4', 4))\nAS Products(supplier_id, product_id, rating)\nGROUP BY supplier_id, product_id\nUNION ALL\nSELECT\n     supplier_id,\n     cast(null as string) as product_id,\n     COUNT(*) AS total\nFROM (VALUES\n     ('supplier1', 'product1', 4),\n     ('supplier1', 'product2', 3),\n     ('supplier2', 'product3', 3),\n     ('supplier2', 'product4', 4))\nAS Products(supplier_id, product_id, rating)\nGROUP BY supplier_id\nUNION ALL\nSELECT\n     cast(null as string) AS supplier_id,\n     cast(null as string) AS product_id,\n     COUNT(*) AS total\nFROM (VALUES\n     ('supplier1', 'product1', 4),\n     ('supplier1', 'product2', 3),\n     ('supplier2', 'product3', 3),\n     ('supplier2', 'product4', 4))\nAS Products(supplier_id, product_id, rating)\n<\/code><\/pre>\n\n\n\n<p>\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>+I&#91;supplier1, product1, 1]\n+I&#91;supplier1, null, 1]\n+I&#91;null, null, 1]\n+I&#91;supplier1, product2, 1]\n-U&#91;supplier1, null, 1]\n+U&#91;supplier1, null, 2]\n-U&#91;null, null, 1]\n+U&#91;null, null, 2]\n+I&#91;supplier2, product3, 1]\n+I&#91;supplier2, null, 1]\n-U&#91;null, null, 2]\n+U&#91;null, null, 3]\n+I&#91;supplier2, product4, 1]\n-U&#91;supplier2, null, 1]\n+U&#91;supplier2, null, 2]\n-U&#91;null, null, 3]\n+U&#91;null, null, 4]\n<\/code><\/pre>\n\n\n\n<p>grouping sets \u80fd\u5e2e\u52a9\u6211\u4eec\u5728\u591a\u7ef4\u573a\u666f\u4e0b\uff0c\u51cf\u5c11\u5f88\u591a\u5197\u4f59\u4ee3\u7801\u3002\u5173\u4e8e grouping sets \u539f\u7406\u540e\u9762\u7684\u7cfb\u5217\u6587\u7ae0\u4f1a\u4ecb\u7ecd\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic4.zhimg.com\/80\/v2-3fae9e0ab2e0f79f9860d5b41a119a07_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>38<\/p>\n\n\n\n<p><strong>2.rollup<\/strong><\/p>\n\n\n\n<p>rollup \u662f\u4e0a\u5377\u8ba1\u7b97\u7684\u4e00\u79cd\u7b80\u5316\u5199\u6cd5\u3002\u6bd4\u5982\u53ef\u4ee5\u628a&nbsp;<code>GROUPING SETS ((supplier_id, product_id), (supplier_id), ())<\/code>&nbsp;\u7b80\u5316\u4e3a&nbsp;<code>ROLLUP (supplier_id, product_id)<\/code>\u3002<\/p>\n\n\n\n<p>\u6570\u636e\u6c47\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE sink_table (\n    supplier_id STRING,\n    product_id STRING,\n    total BIGINT\n) WITH (\n  'connector' = 'print'\n)\n<\/code><\/pre>\n\n\n\n<p>\u6570\u636e\u5904\u7406\u903b\u8f91\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT supplier_id, rating, COUNT(*)\nFROM (VALUES\n    ('supplier1', 'product1', 4),\n    ('supplier1', 'product2', 3),\n    ('supplier2', 'product3', 3),\n    ('supplier2', 'product4', 4))\nAS Products(supplier_id, product_id, rating)\nGROUP BY ROLLUP (supplier_id, product_id)\n<\/code><\/pre>\n\n\n\n<p>\u5176\u7ed3\u679c\u7b49\u540c\u4e8e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT supplier_id, rating, product_id, COUNT(*)\nFROM (VALUES\n    ('supplier1', 'product1', 4),\n    ('supplier1', 'product2', 3),\n    ('supplier2', 'product3', 3),\n    ('supplier2', 'product4', 4))\nAS Products(supplier_id, product_id, rating)\nGROUP BY GROUPING SET (\n    ( supplier_id, product_id ),\n    ( supplier_id             ),\n    (                         )\n)\n<\/code><\/pre>\n\n\n\n<p>\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>+I&#91;supplier1, product1, 1]\n+I&#91;supplier1, null, 1]\n+I&#91;null, null, 1]\n+I&#91;supplier1, product2, 1]\n-U&#91;supplier1, null, 1]\n+U&#91;supplier1, null, 2]\n-U&#91;null, null, 1]\n+U&#91;null, null, 2]\n+I&#91;supplier2, product3, 1]\n+I&#91;supplier2, null, 1]\n-U&#91;null, null, 2]\n+U&#91;null, null, 3]\n+I&#91;supplier2, product4, 1]\n-U&#91;supplier2, null, 1]\n+U&#91;supplier2, null, 2]\n-U&#91;null, null, 3]\n+U&#91;null, null, 4]\n<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic4.zhimg.com\/80\/v2-3106bfac41c31a6afe015027fd2bb1e3_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>39<\/p>\n\n\n\n<p><strong>5.CUBE \u8ba1\u7b97<\/strong><\/p>\n\n\n\n<p>\u6e90\u7801\u516c\u4f17\u53f7\u540e\u53f0\u56de\u590d<strong>\u4e0d\u4f1a\u8fde\u6700\u9002\u5408 flink sql \u7684 ETL \u548c group agg \u573a\u666f\u90fd\u6ca1\u89c1\u8fc7\u5427<\/strong>\u83b7\u53d6\u3002<\/p>\n\n\n\n<p>cube \u76f8\u5f53\u4e8e\u662f\u4e00\u79cd\u8986\u76d6\u4e86\u6240\u6709\u7ef4\u5ea6\u7ec4\u5408\u805a\u5408\u8ba1\u7b97\u3002\u6bd4\u5982 group by a, b, c\u3002\u5176\u4f1a\u5c06 a, b, c \u4e09\u4e2a\u7ef4\u5ea6\u7684\u6240\u6709\u7ef4\u5ea6\u7ec4\u5408\u8fdb\u884c group by\u3002<\/p>\n\n\n\n<p>\u6570\u636e\u6c47\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE sink_table (\n    supplier_id STRING,\n    product_id STRING,\n    total BIGINT\n) WITH (\n  'connector' = 'print'\n)\n<\/code><\/pre>\n\n\n\n<p>\u6570\u636e\u5904\u7406\u903b\u8f91\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT supplier_id, rating, product_id, COUNT(*)\nFROM (VALUES\n    ('supplier1', 'product1', 4),\n    ('supplier1', 'product2', 3),\n    ('supplier2', 'product3', 3),\n    ('supplier2', 'product4', 4))\nAS Products(supplier_id, product_id, rating)\nGROUP BY CUBE (supplier_id, product_id)\n<\/code><\/pre>\n\n\n\n<p>\u5b83\u7b49\u540c\u4e8e<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT supplier_id, rating, product_id, COUNT(*)\nFROM (VALUES\n    ('supplier1', 'product1', 4),\n    ('supplier1', 'product2', 3),\n    ('supplier2', 'product3', 3),\n    ('supplier2', 'product4', 4))\nAS Products(supplier_id, product_id, rating)\nGROUP BY GROUPING SET (\n    ( supplier_id, product_id ),\n    ( supplier_id             ),\n    (              product_id ),\n    (                         )\n)\n<\/code><\/pre>\n\n\n\n<p>\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>+I&#91;supplier1, product1, 1]\n+I&#91;supplier1, null, 1]\n+I&#91;null, product1, 1]\n+I&#91;null, null, 1]\n+I&#91;supplier1, product2, 1]\n-U&#91;supplier1, null, 1]\n+U&#91;supplier1, null, 2]\n+I&#91;null, product2, 1]\n-U&#91;null, null, 1]\n+U&#91;null, null, 2]\n+I&#91;supplier2, product3, 1]\n+I&#91;supplier2, null, 1]\n+I&#91;null, product3, 1]\n-U&#91;null, null, 2]\n+U&#91;null, null, 3]\n+I&#91;supplier2, product4, 1]\n-U&#91;supplier2, null, 1]\n+U&#91;supplier2, null, 2]\n+I&#91;null, product4, 1]\n-U&#91;null, null, 3]\n+U&#91;null, null, 4]\n<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic4.zhimg.com\/80\/v2-b641ddc8dfbeb1cbfd17ab81edd4ba07_720w.webp\" alt=\"\"\/><\/figure>\n\n\n\n<p>40<\/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%E7%AF%87\"><\/span>5.\u603b\u7ed3\u4e0e\u5c55\u671b\u7bc7<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u672c\u6587\u4e3b\u8981\u4ecb\u7ecd\u4e86 ETL\uff0cgroup agg \u805a\u5408\u7c7b\u6307\u6807\u7684\u4e00\u4e9b\u5e38\u89c1\u573a\u666f\u6848\u4f8b\u4ee5\u53ca\u5176\u5e95\u5c42\u8fd0\u884c\u539f\u7406\u3002\u6211\u4eec\u53ef\u4ee5\u53d1\u73b0 flink sql \u7684\u8bed\u6cd5\u5176\u5b9e\u548c hive sql\uff0cmysql \u5565\u7684\u8bed\u6cd5\u90fd\u662f\u57fa\u672c\u4e00\u81f4\u7684\u3002\u6240\u4ee5\u4e0a\u624b flink sql \u65f6\uff0c\u8bed\u6cd5\u57fa\u672c\u4e0d\u4f1a\u6210\u4e3a\u6211\u4eec\u7684\u969c\u788d\u3002<\/p>\n\n\n\n<p>\u800c\u4e14\u4e5f\u4ecb\u7ecd\u4e86\u5728\u67e5\u770b flink sql \u4efb\u52a1\u65f6\u7684\u4e00\u4e9b\u6280\u5de7\uff1a<\/p>\n\n\n\n<ol>\n<li>\u53bb flink webui \u770b\u770b\u8fd9\u4e2a\u4efb\u52a1\u76ee\u524d\u5728\u505a\u4ec0\u4e48\u3002\u5305\u62ec\u7b97\u5b50\u540d\u79f0\u90fd\u4f1a\u7ed9\u76f4\u63a5\u5c55\u793a\u7ed9\u6211\u4eec\u76ee\u524d\u54ea\u4e2a\u7b97\u5b50\u5728\u5e72\u5565\u4e8b\u60c5\uff0c\u5728\u5904\u7406\u5565\u903b\u8f91\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u4f60\u60f3\u77e5\u9053\u4f60\u7684 flink \u4efb\u52a1\u6267\u884c\u4e86\u4ec0\u4e48\u4ee3\u7801\uff0c\u5c31\u53bb\u770b\u770b sql \u6700\u540e\u8f6c\u6362\u6210\u7684 transformation \u91cc\u9762\u5177\u4f53\u8981\u6267\u884c\u54ea\u4e9b\u64cd\u4f5c\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u8f6c\u81ea\uff1a<a rel=\"noreferrer noopener\" href=\"https:\/\/www.zhihu.com\/people\/onemango\" target=\"_blank\">\u5927\u6570\u636e\u7f8a\u8bf4<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>1.\u5e8f\u7bc7-\u672c\u6587\u7ed3\u6784 \u524d\u9762\u7684\u7ae0\u8282\u94fa\u57ab\u4e86\u90a3\u4e48\u591a\uff0c\u7ec8\u4e8e\u5728\u672c\u8282\u8d70\u5165\u4e00\u6761 query \u4e86\u3002 \u9488\u5bf9 datast&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%b57-%e4%b8%8d%e4%bc%9a%e8%bf%9e%e6%9c%80%e9%80%82%e5%90%88-flink-sql-%e7%9a%84-etl-%e5%92%8c-group-agg-%e5%9c%ba\/\" class=\"more-link read-more\" rel=\"bookmark\">\u7ee7\u7eed\u9605\u8bfb <span class=\"screen-reader-text\">\u3010\u8fd0\u7ef4\u5de5\u5177\u3011Flink SQL \u5b9e\u8df57 \u4e0d\u4f1a\u8fde\u6700\u9002\u5408 flink sql \u7684 ETL \u548c group agg \u573a\u666f\u90fd\u6ca1\u89c1\u8fc7\u5427\uff1f<\/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":806,"_links":{"self":[{"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/posts\/1328"}],"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=1328"}],"version-history":[{"count":2,"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/posts\/1328\/revisions"}],"predecessor-version":[{"id":1330,"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/posts\/1328\/revisions\/1330"}],"wp:attachment":[{"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/media?parent=1328"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/categories?post=1328"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/tags?post=1328"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}