{"id":160261,"date":"2024-11-03T21:37:36","date_gmt":"2024-11-03T13:37:36","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160261\/"},"modified":"2024-11-03T21:37:37","modified_gmt":"2024-11-03T13:37:37","slug":"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-subplan-scan","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160261\/","title":{"rendered":"OceanBase \u6559\u7a0b\uff1aOceanBase SUBPLAN SCAN"},"content":{"rendered":"<h1 id=\"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-subplan-scan-FZkCRKtpwF\">OceanBase \u6559\u7a0b\uff1aOceanBase SUBPLAN SCAN<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u5eab\u6280\u8853\u4e2d\uff0cOceanBase \u4f5c\u70ba\u4e00\u500b\u9ad8\u6027\u80fd\u7684\u5206\u4f48\u5f0f\u6578\u64da\u5eab\u7cfb\u7d71\uff0c\u8d8a\u4f86\u8d8a\u53d7\u5230\u958b\u767c\u8005\u548c\u4f01\u696d\u7684\u9752\u775e\u3002\u5b83\u7684\u8a2d\u8a08\u65e8\u5728\u652f\u6301\u5927\u898f\u6a21\u7684\u4e8b\u52d9\u8655\u7406\u548c\u9ad8\u53ef\u7528\u6027\uff0c\u7279\u5225\u9069\u5408\u91d1\u878d\u3001\u96fb\u5546\u7b49\u884c\u696d\u7684\u9700\u6c42\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e OceanBase \u4e2d\u7684 SUBPLAN SCAN \u6a5f\u5236\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u5176\u5de5\u4f5c\u539f\u7406\u53ca\u61c9\u7528\u5834\u666f\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-subplan-scan%ef%bc%9f-FZkCRKtpwF\">\u4ec0\u9ebc\u662f SUBPLAN SCAN\uff1f<\/h2>\n<p>SUBPLAN SCAN \u662f OceanBase \u4e2d\u7684\u4e00\u7a2e\u67e5\u8a62\u57f7\u884c\u7b56\u7565\uff0c\u4e3b\u8981\u7528\u65bc\u512a\u5316\u8907\u96dc\u67e5\u8a62\u7684\u6027\u80fd\u3002\u7576\u67e5\u8a62\u6d89\u53ca\u591a\u500b\u8868\u7684\u806f\u63a5\u6216\u5b50\u67e5\u8a62\u6642\uff0cSUBPLAN SCAN \u53ef\u4ee5\u6709\u6548\u5730\u6e1b\u5c11\u6578\u64da\u7684\u6383\u63cf\u91cf\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/p>\n<h2 id=\"subplan-scan-%e7%9a%84%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86-FZkCRKtpwF\">SUBPLAN SCAN \u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n<p>\u5728 OceanBase \u4e2d\uff0c\u7576\u57f7\u884c\u4e00\u500b\u67e5\u8a62\u6642\uff0c\u67e5\u8a62\u512a\u5316\u5668\u6703\u5206\u6790\u67e5\u8a62\u7684\u7d50\u69cb\uff0c\u4e26\u6c7a\u5b9a\u6700\u512a\u7684\u57f7\u884c\u8a08\u5283\u3002SUBPLAN SCAN \u4e3b\u8981\u7528\u65bc\u8655\u7406\u4ee5\u4e0b\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li>\u7576\u67e5\u8a62\u4e2d\u5305\u542b\u5b50\u67e5\u8a62\u6642\uff0c\u512a\u5316\u5668\u6703\u5c07\u5b50\u67e5\u8a62\u7684\u7d50\u679c\u96c6\u4f5c\u70ba\u4e00\u500b\u81e8\u6642\u8868\u4f86\u9032\u884c\u6383\u63cf\u3002<\/li>\n<li>\u5728\u591a\u8868\u806f\u63a5\u7684\u60c5\u6cc1\u4e0b\uff0cSUBPLAN SCAN \u53ef\u4ee5\u6e1b\u5c11\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u6383\u63cf\uff0c\u50c5\u91dd\u5c0d\u9700\u8981\u7684\u6578\u64da\u9032\u884c\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<p>\u5177\u9ad4\u4f86\u8aaa\uff0c\u7576\u4e00\u500b\u67e5\u8a62\u9700\u8981\u5f9e\u591a\u500b\u8868\u4e2d\u63d0\u53d6\u6578\u64da\u6642\uff0cOceanBase \u6703\u9996\u5148\u57f7\u884c\u5b50\u67e5\u8a62\uff0c\u7136\u5f8c\u5c07\u5176\u7d50\u679c\u7528\u4f5c\u4e3b\u67e5\u8a62\u7684\u904e\u6ffe\u689d\u4ef6\u3002\u9019\u6a23\u53ef\u4ee5\u986f\u8457\u6e1b\u5c11\u4e3b\u67e5\u8a62\u7684\u6578\u64da\u91cf\uff0c\u5f9e\u800c\u63d0\u9ad8\u6574\u9ad4\u67e5\u8a62\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8-subplan-scan-%e7%9a%84%e7%a4%ba%e4%be%8b-FZkCRKtpwF\">\u4f7f\u7528 SUBPLAN SCAN \u7684\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728 OceanBase \u4e2d\u4f7f\u7528 SUBPLAN SCAN\u3002\u5047\u8a2d\u6211\u5011\u6709\u5169\u500b\u8868\uff1a<code>orders<\/code> \u548c <code>customers<\/code>\uff0c\u6211\u5011\u5e0c\u671b\u67e5\u8a62\u6240\u6709\u4e0b\u904e\u8a02\u55ae\u7684\u5ba2\u6236\u7684\u8a73\u7d30\u4fe1\u606f\u3002<\/p>\n<pre><code>SELECT * FROM customers \nWHERE customer_id IN (\n    SELECT customer_id FROM orders WHERE order_date &gt; '2023-01-01'\n);\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u5167\u90e8\u7684\u5b50\u67e5\u8a62\u6703\u9996\u5148\u57f7\u884c\uff0c\u7372\u53d6\u6240\u6709\u5728 2023 \u5e74 1 \u6708 1 \u65e5\u4e4b\u5f8c\u4e0b\u904e\u8a02\u55ae\u7684\u5ba2\u6236 ID\u3002\u7136\u5f8c\uff0c\u5916\u90e8\u67e5\u8a62\u5c07\u4f7f\u7528\u9019\u4e9b ID \u4f86\u904e\u6ffe <code>customers<\/code> \u8868\u4e2d\u7684\u6578\u64da\u3002\u9019\u6a23\u7684\u57f7\u884c\u65b9\u5f0f\u80fd\u5920\u6709\u6548\u5730\u6e1b\u5c11\u9700\u8981\u6383\u63cf\u7684\u6578\u64da\u91cf\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/p>\n<h2 id=\"subplan-scan-%e7%9a%84%e5%84%aa%e5%8b%a2-FZkCRKtpwF\">SUBPLAN SCAN \u7684\u512a\u52e2<\/h2>\n<p>\u4f7f\u7528 SUBPLAN SCAN \u6709\u4ee5\u4e0b\u5e7e\u500b\u512a\u52e2\uff1a<\/p>\n<ul>\n<li><strong>\u6027\u80fd\u63d0\u5347\uff1a<\/strong>\u901a\u904e\u6e1b\u5c11\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u6383\u63cf\uff0cSUBPLAN SCAN \u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u7684\u57f7\u884c\u901f\u5ea6\u3002<\/li>\n<li><strong>\u8cc7\u6e90\u7bc0\u7701\uff1a<\/strong>\u6e1b\u5c11\u4e86 I\/O \u64cd\u4f5c\uff0c\u5f9e\u800c\u964d\u4f4e\u4e86\u7cfb\u7d71\u8cc7\u6e90\u7684\u6d88\u8017\u3002<\/li>\n<li><strong>\u9748\u6d3b\u6027\uff1a<\/strong>\u80fd\u5920\u8655\u7406\u8907\u96dc\u7684\u67e5\u8a62\u7d50\u69cb\uff0c\u9069\u61c9\u591a\u7a2e\u67e5\u8a62\u9700\u6c42\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-FZkCRKtpwF\">\u7e3d\u7d50<\/h2>\n<p>SUBPLAN SCAN \u662f OceanBase \u4e2d\u4e00\u500b\u91cd\u8981\u7684\u67e5\u8a62\u512a\u5316\u6280\u8853\uff0c\u80fd\u5920\u6709\u6548\u63d0\u5347\u8907\u96dc\u67e5\u8a62\u7684\u6027\u80fd\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528 SUBPLAN SCAN\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5728\u8655\u7406\u5927\u898f\u6a21\u6578\u64da\u6642\u7372\u5f97\u66f4\u597d\u7684\u6027\u80fd\u548c\u8cc7\u6e90\u5229\u7528\u7387\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\u5834\u666f\uff0cOceanBase \u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u652f\u6301\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u670d\u52d9\u611f\u8208\u8da3\uff0c\u6216\u60f3\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">\u96f2\u4f3a\u670d\u5668<\/a> \u7684\u8cc7\u8a0a\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8a73\u7d30\u8cc7\u6599\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Learn how to optimize queries in OceanBase using SUBPLAN SCAN. This tutorial covers techniques for efficient data retrieval and performance enhancement.<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-160261","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160261","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=160261"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160261\/revisions"}],"predecessor-version":[{"id":160262,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160261\/revisions\/160262"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160261"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160261"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160261"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}