{"id":61433,"date":"2024-10-13T11:05:16","date_gmt":"2024-10-13T03:05:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/61433\/"},"modified":"2024-10-13T11:05:16","modified_gmt":"2024-10-13T03:05:16","slug":"flink-sql-%e7%9f%a5%e5%85%b6%e6%89%80%e4%bb%a5%e7%84%b6%ef%bc%9a%e8%90%ac%e5%ad%97%e8%a9%b3%e8%bf%b0-flink-sql-%e5%9b%9b%e7%a8%ae%e6%99%82%e9%96%93%e7%aa%97%e5%8f%a3%e8%aa%9e%e7%be%a9%ef%bc%81","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/61433\/","title":{"rendered":"Flink SQL \u77e5\u5176\u6240\u4ee5\u7136\uff1a\u842c\u5b57\u8a73\u8ff0 Flink SQL \u56db\u7a2e\u6642\u9593\u7a97\u53e3\u8a9e\u7fa9\uff01"},"content":{"rendered":"

Flink SQL \u77e5\u5176\u6240\u4ee5\u7136\uff1a\u842c\u5b57\u8a73\u8ff0 Flink SQL \u56db\u7a2e\u6642\u9593\u7a97\u53e3\u8a9e\u7fa9\uff01<\/h1>\n

Apache Flink \u662f\u4e00\u500b\u5f37\u5927\u7684\u6d41\u8655\u7406\u6846\u67b6\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5927\u6578\u64da\u8655\u7406\u548c\u5be6\u6642\u6578\u64da\u5206\u6790\u3002Flink SQL \u4f5c\u70ba\u5176\u4e00\u90e8\u5206\uff0c\u63d0\u4f9b\u4e86\u4e00\u7a2e\u7c21\u55ae\u800c\u9ad8\u6548\u7684\u65b9\u5f0f\u4f86\u67e5\u8a62\u6d41\u6578\u64da\u3002\u5728\u9032\u884c\u6d41\u8655\u7406\u6642\uff0c\u6642\u9593\u7a97\u53e3\u7684\u6982\u5ff5\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e Flink SQL \u4e2d\u7684\u56db\u7a2e\u6642\u9593\u7a97\u53e3\u8a9e\u7fa9\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u5176\u80cc\u5f8c\u7684\u539f\u7406\u548c\u61c9\u7528\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u6642\u9593\u7a97\u53e3\uff1f<\/h2>\n

\u5728\u6d41\u8655\u7406\u4e2d\uff0c\u6578\u64da\u662f\u6301\u7e8c\u4e0d\u65b7\u5730\u6d41\u5165\u7684\uff0c\u9019\u4f7f\u5f97\u6211\u5011\u7121\u6cd5\u50cf\u6279\u8655\u7406\u90a3\u6a23\u4e00\u6b21\u6027\u8655\u7406\u6240\u6709\u6578\u64da\u3002\u70ba\u4e86\u6709\u6548\u5730\u5206\u6790\u9019\u4e9b\u6578\u64da\uff0c\u6211\u5011\u9700\u8981\u5c07\u5176\u5283\u5206\u70ba\u4e0d\u540c\u7684\u6642\u9593\u6bb5\uff0c\u9019\u5c31\u662f\u6642\u9593\u7a97\u53e3\u7684\u4f5c\u7528\u3002Flink SQL \u63d0\u4f9b\u4e86\u591a\u7a2e\u6642\u9593\u7a97\u53e3\u7684\u8a9e\u7fa9\uff0c\u4ee5\u9069\u61c9\u4e0d\u540c\u7684\u61c9\u7528\u5834\u666f\u3002<\/p>\n

1. \u6efe\u52d5\u7a97\u53e3\uff08Tumbling Window\uff09<\/h3>\n

\u6efe\u52d5\u7a97\u53e3\u662f\u6700\u57fa\u672c\u7684\u7a97\u53e3\u985e\u578b\u3002\u5b83\u5c07\u6578\u64da\u6d41\u5283\u5206\u70ba\u56fa\u5b9a\u5927\u5c0f\u7684\u6642\u9593\u6bb5\uff0c\u4e26\u4e14\u6bcf\u500b\u7a97\u53e3\u4e4b\u9593\u4e0d\u91cd\u758a\u3002\u7576\u4e00\u500b\u7a97\u53e3\u7d50\u675f\u6642\uff0c\u6240\u6709\u5c6c\u65bc\u8a72\u7a97\u53e3\u7684\u6578\u64da\u5c07\u88ab\u8655\u7406\u3002<\/p>\n

SELECT COUNT(*) \nFROM table_name \nGROUP BY TUMBLE(event_time, INTERVAL '10' MINUTE);\n<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6578\u64da\u5c07\u6bcf 10 \u5206\u9418\u9032\u884c\u4e00\u6b21\u805a\u5408\uff0c\u4e26\u4e14\u6bcf\u500b\u7a97\u53e3\u7684\u6578\u64da\u4e0d\u6703\u91cd\u758a\u3002<\/p>\n
2. \u6ed1\u52d5\u7a97\u53e3\uff08Sliding Window\uff09<\/h3>\n
\u6ed1\u52d5\u7a97\u53e3\u5141\u8a31\u7a97\u53e3\u4e4b\u9593\u91cd\u758a\uff0c\u9019\u610f\u5473\u8457\u5728\u6bcf\u500b\u6642\u9593\u9ede\u4e0a\uff0c\u53ef\u80fd\u6703\u6709\u591a\u500b\u7a97\u53e3\u540c\u6642\u5b58\u5728\u3002\u9019\u7a2e\u7a97\u53e3\u985e\u578b\u9069\u5408\u9700\u8981\u66f4\u7d30\u7dfb\u5206\u6790\u7684\u5834\u666f\u3002<\/p>\n
SELECT COUNT(*) \nFROM table_name \nGROUP BY SLIDE(event_time, INTERVAL '10' MINUTE, INTERVAL '5' MINUTE);\n<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u7a97\u53e3\u6bcf 5 \u5206\u9418\u6ed1\u52d5\u4e00\u6b21\uff0c\u6bcf\u500b\u7a97\u53e3\u7684\u5927\u5c0f\u70ba 10 \u5206\u9418\uff0c\u9019\u6a23\u53ef\u4ee5\u7372\u5f97\u66f4\u9023\u7e8c\u7684\u6578\u64da\u5206\u6790\u3002<\/p>\n
3. \u6703\u8a71\u7a97\u53e3\uff08Session Window\uff09<\/h3>\n
\u6703\u8a71\u7a97\u53e3\u6839\u64da\u4e8b\u4ef6\u4e4b\u9593\u7684\u9593\u9694\u81ea\u52d5\u8abf\u6574\u7a97\u53e3\u7684\u5927\u5c0f\u3002\u7576\u4e8b\u4ef6\u4e4b\u9593\u7684\u6642\u9593\u9593\u9694\u8d85\u904e\u6307\u5b9a\u7684\u95be\u503c\u6642\uff0c\u7a97\u53e3\u5c07\u7d50\u675f\uff0c\u4e26\u958b\u59cb\u4e00\u500b\u65b0\u7684\u7a97\u53e3\u3002\u9019\u7a2e\u7a97\u53e3\u985e\u578b\u7279\u5225\u9069\u5408\u7528\u65bc\u8655\u7406\u7528\u6236\u884c\u70ba\u6578\u64da\u3002<\/p>\n
SELECT COUNT(*) \nFROM table_name \nGROUP BY SESSION(event_time, INTERVAL '30' MINUTE);\n<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6703\u8a71\u7a97\u53e3\u6703\u5728\u4e8b\u4ef6\u4e4b\u9593\u7684\u9593\u9694\u8d85\u904e 30 \u5206\u9418\u6642\u7d50\u675f\uff0c\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u5730\u6355\u6349\u7528\u6236\u7684\u6d3b\u52d5\u6a21\u5f0f\u3002<\/p>\n
4. \u81ea\u5b9a\u7fa9\u7a97\u53e3\uff08Custom Window\uff09<\/h3>\n
\u9664\u4e86\u4e0a\u8ff0\u4e09\u7a2e\u7a97\u53e3\uff0cFlink SQL \u9084\u652f\u6301\u7528\u6236\u81ea\u5b9a\u7fa9\u7a97\u53e3\u3002\u9019\u610f\u5473\u8457\u7528\u6236\u53ef\u4ee5\u6839\u64da\u7279\u5b9a\u9700\u6c42\u8a2d\u8a08\u81ea\u5df1\u7684\u7a97\u53e3\u908f\u8f2f\uff0c\u4ee5\u6eff\u8db3\u7279\u5b9a\u7684\u696d\u52d9\u9700\u6c42\u3002<\/p>\n
SELECT COUNT(*) \nFROM table_name \nGROUP BY CUSTOM(event_time, YOUR_CUSTOM_LOGIC);\n<\/code><\/pre>\n
\u9019\u88e1\u7684 YOUR_CUSTOM_LOGIC \u53ef\u4ee5\u662f\u7528\u6236\u6839\u64da\u696d\u52d9\u9700\u6c42\u5b9a\u7fa9\u7684\u4efb\u4f55\u908f\u8f2f\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
Flink SQL \u63d0\u4f9b\u4e86\u591a\u7a2e\u6642\u9593\u7a97\u53e3\u8a9e\u7fa9\uff0c\u5e6b\u52a9\u7528\u6236\u6839\u64da\u4e0d\u540c\u7684\u9700\u6c42\u9032\u884c\u6578\u64da\u5206\u6790\u3002\u7121\u8ad6\u662f\u6efe\u52d5\u7a97\u53e3\u3001\u6ed1\u52d5\u7a97\u53e3\u3001\u6703\u8a71\u7a97\u53e3\u9084\u662f\u81ea\u5b9a\u7fa9\u7a97\u53e3\uff0c\u9019\u4e9b\u5de5\u5177\u90fd\u80fd\u6709\u6548\u5730\u8655\u7406\u6d41\u6578\u64da\uff0c\u4e26\u63d0\u4f9b\u6709\u50f9\u503c\u7684\u898b\u89e3\u3002\u5c0d\u65bc\u5e0c\u671b\u5728\u9999\u6e2f\u9032\u884c\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u5c07\u662f\u6210\u529f\u7684\u95dc\u9375\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6df1\u5165\u63a2\u8a0eFlink SQL\u7684\u56db\u7a2e\u6642\u9593\u7a97\u53e3\u8a9e\u7fa9\uff0c\u842c\u5b57\u8a73\u8ff0\u5176\u80cc\u5f8c\u539f\u7406\u8207\u61c9\u7528\uff0c\u52a9\u4f60\u638c\u63e1\u6d41\u8655\u7406\u7684\u7cbe\u9ad3\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-61433","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61433","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=61433"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61433\/revisions"}],"predecessor-version":[{"id":61434,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61433\/revisions\/61434"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=61433"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=61433"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=61433"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}