{"id":119951,"date":"2026-10-30T18:48:58","date_gmt":"2026-10-30T10:48:58","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/119951.html"},"modified":"2026-10-30T18:48:58","modified_gmt":"2026-10-30T10:48:58","slug":"%e6%b7%b1%e5%85%a5%e7%90%86%e8%a7%a3%e7%b4%a2%e5%bc%95%e4%b8%8b%e6%8e%a8-icp%ef%bc%9a%e5%9c%a8%e5%a4%8d%e5%90%88%e7%b4%a2%e5%bc%95%e5%9c%ba%e6%99%af%e4%b8%8b%e5%87%8f%e5%b0%91%e5%bc%95%e6%93%8e","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/119951.html","title":{"rendered":"\u6df1\u5165\u7406\u89e3\u7d22\u5f15\u4e0b\u63a8 ICP\uff1a\u5728\u590d\u5408\u7d22\u5f15\u573a\u666f\u4e0b\u51cf\u5c11\u5f15\u64ce\u5c42\u4e0e\u670d\u52a1\u5668\u5c42\u4ea4\u4e92"},"content":{"rendered":"<p>        \/* MD \/ \u5bcc\u6587\u672c\u4e2d\u7684 .toc\uff08\u542b\u535a\u5ba2\u56ed\u642c\u5bb6\u7b49\u5d4c\u5957\u7ed3\u6784\uff09\uff1b.toc-box \u5728\u4fa7\u680f\uff0c\u4e0d\u53d7\u5f71\u54cd *\/<br \/>\n        #content_views .toc,<br \/>\n        \/* \u7f16\u8f91\u5668\u5e38\u5728\u76ee\u5f55\u524d\u540e\u63d2\u5165\u7a7a p\uff08:empty \u4ecd\u5360 20px\uff09\uff0c\u4e00\u5e76\u53bb\u6389\u907f\u514d\u9876\u7a7a\u9699 *\/<br \/>\n        #content_views.markdown_views &gt; p:empty:has(+ .toc),<br \/>\n        #content_views.markdown_views &gt; .toc + p:empty,<br \/>\n        \/* \u5bcc\u6587\u672c\u65e7\u7248\u76ee\u5f55\u6807\u8bb0 *\/<br \/>\n        #content_views.htmledit_views #main-toc,<br \/>\n        #content_views.htmledit_views #hr-toc,<br \/>\n        #content_views.htmledit_views p[id*=\\&#8221;-toc\\&#8221;] {<br \/>\n          display: none !important;<br \/>\n        }<br \/>\n        \/* \u76ee\u5f55\u53bb\u6389\u540e\uff0c\u7d27\u8ddf\u7684\u9996\u4e2a\u6807\u9898\u4e0d\u518d\u591a\u51fa\u4e00\u5757\u4e0a\u8fb9\u8ddd *\/<br \/>\n        #content_views.markdown_views &gt; .toc + h1,<br \/>\n        #content_views.markdown_views &gt; .toc + h2,<br \/>\n        #content_views.markdown_views &gt; .toc + h3,<br \/>\n        #content_views.markdown_views &gt; .toc + h4,<br \/>\n        #content_views.markdown_views &gt; .toc + p:empty + h1,<br \/>\n        #content_views.markdown_views &gt; .toc + p:empty + h2,<br \/>\n        #content_views.markdown_views &gt; .toc + p:empty + h3,<br \/>\n        #content_views.markdown_views &gt; .toc + p:empty + h4 {<br \/>\n          margin-top: 0 !important;<br \/>\n        }<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261030104857-6ae47619b7a91.webp\" alt=\"\u5c01\u9762\u4fe1\u606f\u56fe\" \/><\/p>\n<p>\u5728 MySQL \u6027\u80fd\u8c03\u4f18\u7684\u9762\u8bd5\u548c\u5b9e\u6218\u4e2d&#xff0c;\u201c\u7d22\u5f15\u4e0b\u63a8&#xff08;Index Condition Pushdown, \u7b80\u79f0 ICP&#xff09;\u201d\u662f\u4e00\u4e2a\u9ad8\u9891\u51fa\u73b0\u7684\u8bcd\u6c47\u3002\u5f88\u591a\u5de5\u7a0b\u5e08\u5728\u6267\u884c\u8ba1\u5212\u91cc\u770b\u5230 Using index condition \u65f6&#xff0c;\u53ea\u77e5\u9053\u201c\u8fd9\u8bf4\u660e\u8d70\u7d22\u5f15\u4e0b\u63a8\u4e86&#xff0c;\u67e5\u8be2\u53d8\u5feb\u4e86\u201d&#xff0c;\u4f46\u5982\u679c\u8ffd\u95ee\u4e00\u53e5&#xff1a;<\/p>\n<ul>\n<li>\u201c\u5230\u5e95\u4ec0\u4e48\u4e1c\u897f\u88ab\u2018\u4e0b\u63a8\u2019\u5230\u4e86\u54ea\u91cc&#xff1f;\u201d<\/li>\n<li>\u201c\u4e3a\u4ec0\u4e48\u6709\u4e86\u590d\u5408\u7d22\u5f15&#xff0c;\u8fd8\u4f1a\u4ea7\u751f\u5927\u91cf\u7684\u56de\u8868 I\/O&#xff1f;\u201d<\/li>\n<li>\u201c\u5728 MySQL 5.6 \u4e4b\u524d\u6ca1\u6709 ICP \u7684\u65f6\u4ee3&#xff0c;\u5b58\u50a8\u5f15\u64ce\u548c\u670d\u52a1\u5c42\u4e4b\u95f4\u7a76\u7adf\u53d1\u751f\u4e86\u4ec0\u4e48\u4f4e\u6548\u7684\u2018\u626f\u76ae\u2019&#xff1f;\u201d<\/li>\n<\/ul>\n<p>\u7edd\u5927\u591a\u6570\u4eba\u5f80\u5f80\u5c31\u8bed\u7109\u4e0d\u8be6\u4e86\u3002<\/p>\n<p>ICP \u662f\u5173\u7cfb\u578b\u6570\u636e\u5e93\u5185\u6838\u4ece\u201c\u7c97\u653e\u5f0f\u67b6\u6784\u201d\u8d70\u5411\u201c\u7cbe\u7ec6\u5316\u4e0b\u63a8\u534f\u540c\u201d\u7684\u91cc\u7a0b\u7891\u5f0f\u6280\u672f\u3002\u4eca\u5929\u6211\u4eec\u5c31\u6765\u6df1\u5165\u5256\u6790 MySQL \u7684\u5206\u5c42\u67b6\u6784&#xff0c;\u590d\u76d8 ICP \u7684\u5e95\u5c42\u6267\u884c\u673a\u5236&#xff0c;\u641e\u61c2\u5b83\u662f\u5982\u4f55\u5728\u590d\u5408\u7d22\u5f15\u573a\u666f\u4e0b\u5c06\u56de\u8868\u7269\u7406 I\/O \u524a\u51cf 90% \u4ee5\u4e0a\u7684\u3002<\/p>\n<hr \/>\n<h3>\u4e00\u3001\u67b6\u6784\u6839\u6e90&#xff1a;Server \u5c42\u4e0e Storage Engine \u5c42\u7684\u9e3f\u6c9f<\/h3>\n<p>\u8981\u60f3\u5f7b\u5e95\u7406\u89e3 ICP&#xff0c;\u9996\u5148\u5fc5\u987b\u5728\u8111\u6d77\u4e2d\u5efa\u7acb\u6e05\u6670\u7684 MySQL \u53cc\u5c42\u5206\u5de5\u6a21\u578b&#xff1a;<\/p>\n<p>\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510<br \/>\n\u2502 MySQL Server \u5c42 (\u670d\u52a1\u5c42)                                    \u2502<br \/>\n\u2502 \u2022 \u8fde\u63a5\u5668\u3001\u89e3\u6790\u5668\u3001CBO \u4f18\u5316\u5668\u3001\u6267\u884c\u5668                        \u2502<br \/>\n\u2502 \u2022 \u8d1f\u8d23\u901a\u7528 SQL \u8bed\u6cd5\u3001\u8de8\u5b58\u50a8\u5f15\u64ce\u7b97\u5b50\u3001\u5185\u5b58\u8fc7\u6ee4\u4e0e\u51fd\u6570\u8ba1\u7b97     \u2502<br \/>\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<br \/>\n                               \u2502 \u5185\u90e8\u884c\u83b7\u53d6\u63a5\u53e3 (handler API)<br \/>\n                               \u2502 \u4f20\u9012\u6bcf\u4e00\u884c\u5b8c\u6574\u8bb0\u5f55 (Row Records)<br \/>\n                               \u25bc<br \/>\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510<br \/>\n\u2502 Storage Engine \u5c42 (\u5982 InnoDB \u5b58\u50a8\u5f15\u64ce)                      \u2502<br \/>\n\u2502 \u2022 \u8d1f\u8d23\u7269\u7406\u6587\u4ef6\u7ba1\u7406\u3001B&#043; \u6811\u7d22\u5f15\u68c0\u7d22\u3001Buffer Pool \u7f13\u5b58\u4e0e\u4e8b\u52a1\u65e5\u5fd7\u2502<br \/>\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/p>\n<p>\u5728\u8fd9\u4e2a\u5206\u5c42\u67b6\u6784\u4e0b&#xff0c;Server \u5c42\u662f\u53d1\u53f7\u65bd\u4ee4\u7684\u201c\u5927\u8111\u201d&#xff0c;\u800c InnoDB \u662f\u5e72\u4f53\u529b\u6d3b\u7684\u201c\u624b\u811a\u201d\u3002\u4e24\u8005\u4e4b\u95f4\u901a\u8fc7\u6807\u51c6\u7684 handler \u62bd\u8c61\u63a5\u53e3\u8fdb\u884c\u901a\u4fe1\u3002\u95ee\u9898\u6070\u6070\u5c31\u51fa\u5728\u8fd9\u6761\u8de8\u5c42\u901a\u4fe1\u4e0e\u56de\u8868\u7684\u6d41\u6c34\u7ebf\u4e0a&#xff01;<\/p>\n<hr \/>\n<h3>\u4e8c\u3001\u6ca1\u6709 ICP \u7684\u6697\u9ed1\u65f6\u4ee3&#xff1a;\u65e0\u4f11\u6b62\u7684\u201c\u65e0\u6548\u56de\u8868\u201d<\/h3>\n<p>\u6211\u4eec\u6765\u770b\u4e00\u4e2a\u7ecf\u5178\u4e1a\u52a1\u573a\u666f&#xff1a;\u7528\u6237\u8ba2\u5355\u8868 orders&#xff0c;\u5305\u542b\u5b57\u6bb5 (user_id, age, phone, address, status)\u3002\u6211\u4eec\u5efa\u7acb\u4e86\u4e00\u4e2a\u8054\u5408\u4e8c\u7ea7\u7d22\u5f15&#xff1a;<\/p>\n<p>CREATE INDEX idx_user_phone ON orders (user_id, phone);<\/p>\n<p>\u73b0\u5728\u4e1a\u52a1\u53d1\u8d77\u4e86\u4e00\u6761\u67e5\u8be2&#xff1a;<\/p>\n<p>SELECT * FROM orders<br \/>\nWHERE user_id LIKE &#039;1001%&#039;<br \/>\n  AND phone LIKE &#039;%8888&#039;;<\/p>\n<h4>1. \u7d22\u5f15\u7684\u6700\u5de6\u5339\u914d\u622a\u65ad<\/h4>\n<p>\u5728\u8fd9\u4e2a\u67e5\u8be2\u4e2d&#xff0c;user_id LIKE &#039;1001%&#039; \u662f\u524d\u7f00\u5339\u914d&#xff0c;\u53ef\u4ee5\u5229\u7528\u4e8c\u7ea7\u7d22\u5f15\u6811\u8fdb\u884c\u4e8c\u5206\u8303\u56f4\u67e5\u627e\u3002\u4f46\u5bf9\u4e8e\u7b2c\u4e8c\u4e2a\u6761\u4ef6 phone LIKE &#039;%8888&#039;&#xff0c;\u7531\u4e8e\u5176\u5f00\u5934\u662f\u6a21\u7cca\u901a\u914d\u7b26 %&#xff0c;\u6839\u636e B&#043; \u6811\u7684\u6709\u5e8f\u6027\u539f\u5219&#xff0c;\u8fd9\u4e2a\u6761\u4ef6\u65e0\u6cd5\u7528\u4e8e\u7f29\u5c0f\u7d22\u5f15\u7684\u68c0\u7d22\u8303\u56f4\u3002<\/p>\n<h4>2. \u5728 MySQL 5.6 \u4e4b\u524d&#xff08;\u672a\u5f15\u5165 ICP&#xff09;\u7684\u60b2\u5267\u6267\u884c\u6d41&#xff1a;<\/h4>\n<p>1. Server \u5c42\u4e0b\u8fbe\u6307\u4ee4: &#034;\u4ece idx_user_phone \u67e5\u627e\u7b2c\u4e00\u4e2a user_id LIKE &#039;1001%&#039; \u7684\u8bb0\u5f55&#034;<br \/>\n2. InnoDB \u5b58\u50a8\u5f15\u64ce:<br \/>\n   &#8211; \u5728\u4e8c\u7ea7\u7d22\u5f15\u6811\u4e2d\u627e\u5230\u4e86\u4e00\u4e2a\u53f6\u5b50\u8282\u70b9 (user_id&#061;&#039;1001A&#039;, phone&#061;&#039;13911118888&#039;)<br \/>\n   &#8211; \u83b7\u53d6\u5230\u8be5\u8bb0\u5f55\u7684\u4e3b\u952e ID (\u5982 id&#061;999)<br \/>\n   &#8211; \u3010\u65e0\u8111\u56de\u8868\u3011&#xff1a;\u6839\u636e\u4e3b\u952e ID&#061;999&#xff0c;\u53bb\u805a\u7c07\u7d22\u5f15 B&#043; \u6811\u628a\u5305\u542b address\u3001status \u7b49\u6574\u6574 1KB \u7684\u5b8c\u6574\u884c\u8bb0\u5f55\u8bfb\u51fa\u6765&#xff01;<br \/>\n   &#8211; \u628a\u8fd9\u884c\u5b8c\u6574\u6570\u636e\u901a\u8fc7 handler API \u9012\u4ea4\u7ed9 Server \u5c42\u3002<br \/>\n3. Server \u5c42\u63a5\u6536\u5230\u6570\u636e:<br \/>\n   &#8211; \u9010\u6761\u68c0\u9a8c: \u8fd9\u884c\u7684 phone \u5305\u542b &#039;8888&#039; \u5417&#xff1f;<br \/>\n   &#8211; \u5982\u679c\u6ee1\u8db3&#xff0c;\u4fdd\u7559&#xff1b;\u5982\u679c\u4e0d\u6ee1\u8db3&#xff0c;\u4e22\u5f03&#xff01;<br \/>\n4. \u91cd\u590d\u4e0a\u8ff0\u6b65\u9aa4 2 \u548c 3&#xff0c;\u76f4\u5230\u626b\u63cf\u5b8c\u6240\u6709 user_id LIKE &#039;1001%&#039; \u7684\u8bb0\u5f55\u3002<\/p>\n<p>\u6ce8\u610f\u770b\u6b65\u9aa4 2 \u4e2d\u7684\u8352\u8c2c\u4e4b\u5904&#xff1a;phone \u5b57\u6bb5\u7684\u503c\u660e\u660e\u5c31\u5df2\u7ecf\u6e05\u6e05\u695a\u695a\u5730\u5b58\u653e\u5728\u5f53\u524d\u7684\u4e8c\u7ea7\u7d22\u5f15\u53f6\u5b50\u8282\u70b9\u91cc\u4e86&#xff01;\u4f46 InnoDB \u5f15\u64ce\u89c6\u800c\u4e0d\u89c1&#xff0c;\u5b83\u53ea\u77e5\u9053\u6309\u7167\u6700\u5de6\u5339\u914d\u62ff\u5230\u4e3b\u952e&#xff0c;\u7136\u540e\u8017\u8d39\u6781\u5176\u6602\u8d35\u7684\u78c1\u76d8\u968f\u673a I\/O \u53bb\u805a\u7c07\u7d22\u5f15\u91cc\u628a\u6574\u884c\u8bfb\u51fa\u6765&#xff0c;\u9012\u7ed9 Server \u5c42&#xff0c;\u7531 Server \u5c42\u53bb\u5224\u5b9a\u5b83\u662f\u4e0d\u662f\u4ee5 8888 \u7ed3\u5c3e\u3002\u5982\u679c\u6ee1\u8db3 user_id LIKE &#039;1001%&#039; \u7684\u8bb0\u5f55\u6709 10 \u4e07\u6761&#xff0c;\u800c\u5176\u4e2d\u771f\u6b63\u7b26\u5408 phone LIKE &#039;%8888&#039; \u7684\u53ea\u6709 10 \u6761&#xff0c;\u7cfb\u7edf\u5c31\u8981\u6267\u884c\u6574\u6574 100,000 \u6b21\u7269\u7406\u56de\u8868&#xff0c;\u5176\u4e2d 99,990 \u6b21\u90fd\u662f\u5f7b\u5e95\u6d6a\u8d39\u7684\u65e0\u7528\u529f&#xff01;<\/p>\n<hr \/>\n<h3>\u4e09\u3001\u7834\u5c40&#xff1a;\u7d22\u5f15\u4e0b\u63a8&#xff08;ICP&#xff09;\u7684\u5e95\u5c42\u91cd\u6784<\/h3>\n<p>MySQL 5.6 \u5f15\u5165 ICP \u540e&#xff0c;\u6267\u884c\u6743\u88ab\u4e0b\u63a8\u5230\u4e86\u5b58\u50a8\u5f15\u64ce\u5185\u90e8&#xff1a;<\/p>\n<p>                       \u3010\u5f00\u542f ICP \u540e\u7684\u7269\u7406\u6267\u884c\u6d41\u3011<\/p>\n<p>\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510<br \/>\n\u2502 1. Server \u5c42\u751f\u6210\u6267\u884c\u8ba1\u5212&#xff0c;\u5c06 where \u6761\u4ef6\u4e2d\u7684\u590d\u5408\u7d22\u5f15\u8c13\u8bcd       \u2502<br \/>\n\u2502    (phone LIKE &#039;%8888&#039;) \u76f4\u63a5\u4e0b\u63a8\u6253\u5305\u7ed9 InnoDB \u5b58\u50a8\u5f15\u64ce       \u2502<br \/>\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<br \/>\n                               \u2502 \u4e0b\u63a8\u8c13\u8bcd (Pushed Condition)<br \/>\n                               \u25bc<br \/>\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510<br \/>\n\u2502 2. InnoDB \u5b58\u50a8\u5f15\u64ce\u5728\u4e8c\u7ea7\u7d22\u5f15\u6811\u4e0a\u904d\u5386:                       \u2502<br \/>\n\u2502    \u251c\u2500\u2500 \u547d\u4e2d user_id LIKE &#039;1001%&#039;                            \u2502<br \/>\n\u2502    \u251c\u2500\u2500 \u3010\u5c31\u5730\u5224\u5b9a\u3011: \u76f4\u63a5\u63d0\u53d6\u5f53\u524d\u7d22\u5f15\u9875\u4e0a\u7684 phone \u5b57\u6bb5\u6bd4\u8f83     \u2502<br \/>\n\u2502    \u2502    \u2514\u2500\u2500 phone \u662f\u5426\u5339\u914d &#039;%8888&#039;&#xff1f;                         \u2502<br \/>\n\u2502    \u2502         \u251c\u2500\u2500 \u274c \u5426: \u76f4\u63a5\u8df3\u8fc7&#xff01;\u5f7b\u5e95\u653e\u5f03\u56de\u8868&#xff01;              \u2502<br \/>\n\u2502    \u2502         \u2514\u2500\u2500 \u2705 \u662f: \u4ec5\u9488\u5bf9\u8fd9\u6781\u5c11\u6570\u884c\u6267\u884c\u4e3b\u952e\u805a\u7c07\u7d22\u5f15\u56de\u8868! \u2502<br \/>\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<br \/>\n                               \u2502 \u4ec5\u8fd4\u56de\u771f\u6b63\u6709\u6548\u7684\u6570\u636e<br \/>\n                               \u25bc<br \/>\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510<br \/>\n\u2502 3. Server \u5c42\u63a5\u6536\u5230\u7684\u6bcf\u4e00\u884c\u51e0\u4e4e\u90fd\u662f\u6709\u6548\u6570\u636e&#xff0c;\u8de8\u5c42\u4ea4\u4e92\u5927\u5e45\u9510\u51cf  \u2502<br \/>\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/p>\n<h4>\u6539\u53d8\u5e26\u6765\u7684\u98de\u8dc3&#xff1a;<\/h4>\n<p>InnoDB \u5728\u626b\u63cf\u4e8c\u7ea7\u7d22\u5f15\u65f6&#xff0c;\u5c31\u5730\u6d88\u5316\u4e86\u6240\u6709\u80fd\u5728\u7d22\u5f15\u4e2d\u76f4\u63a5\u8ba1\u7b97\u7684\u8fc7\u6ee4\u8c13\u8bcd\u3002\u539f\u672c\u7684 100,000 \u6b21\u78c1\u76d8\u56de\u8868&#xff0c;\u77ac\u95f4\u88ab\u62e6\u622a\u538b\u7f29\u4e3a\u4e86\u4ec5\u4ec5 10 \u6b21\u7cbe\u51c6\u56de\u8868&#xff01;\u78c1\u76d8 I\/O \u6d88\u8017\u76f4\u63a5\u7f29\u51cf\u4e86 4 \u4e2a\u6570\u91cf\u7ea7&#xff0c;\u67e5\u8be2\u8017\u65f6\u4ece\u51e0\u79d2\u77ac\u95f4\u7f29\u77ed\u81f3\u6beb\u79d2\u7ea7\u3002<\/p>\n<hr \/>\n<h3>\u56db\u3001\u6df1\u5165 EXPLAIN&#xff1a;\u8bc6\u522b Using index condition<\/h3>\n<p>\u6211\u4eec\u901a\u8fc7\u5b9e\u9645\u7684 SQL \u6267\u884c\u8ba1\u5212\u6765\u9a8c\u8bc1 ICP \u7684\u4ecb\u5165&#xff1a;<\/p>\n<p>EXPLAIN SELECT * FROM orders<br \/>\nWHERE user_id LIKE &#039;1001%&#039;<br \/>\n  AND phone LIKE &#039;%8888&#039;;<\/p>\n<p>\u8f93\u51fa\u7684\u6267\u884c\u8ba1\u5212\u5173\u952e\u7ed3\u679c\u5982\u4e0b&#xff1a;<\/p>\n<p>&#043;&#8212;-&#043;&#8212;&#8212;&#8212;&#8212;-&#043;&#8212;&#8212;&#8211;&#043;&#8212;&#8212;&#8212;&#8212;&#043;&#8212;&#8212;-&#043;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;&#8212;&#8212;&#8212;&#043;&#8212;&#8212;&#043;&#8212;&#8212;&#043;&#8212;&#8212;&#8212;-&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;&#043;<br \/>\n| id | select_type | table  | partitions | type  | possible_keys  | key            | key_len | ref  | rows | filtered | Extra                 |<br \/>\n&#043;&#8212;-&#043;&#8212;&#8212;&#8212;&#8212;-&#043;&#8212;&#8212;&#8211;&#043;&#8212;&#8212;&#8212;&#8212;&#043;&#8212;&#8212;-&#043;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;&#8212;&#8212;&#8212;&#043;&#8212;&#8212;&#043;&#8212;&#8212;&#043;&#8212;&#8212;&#8212;-&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;&#043;<br \/>\n|  1 | SIMPLE      | orders | NULL       | range | idx_user_phone | idx_user_phone | 66      | NULL | 1480 |    11.11 | Using index condition |<br \/>\n&#043;&#8212;-&#043;&#8212;&#8212;&#8212;&#8212;-&#043;&#8212;&#8212;&#8211;&#043;&#8212;&#8212;&#8212;&#8212;&#043;&#8212;&#8212;-&#043;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;&#8212;&#8212;&#8212;&#8212;&#8212;-&#043;&#8212;&#8212;&#8212;&#043;&#8212;&#8212;&#043;&#8212;&#8212;&#043;&#8212;&#8212;&#8212;-&#043;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;&#043;<\/p>\n<h4>\u5173\u952e\u6807\u5fd7\u89e3\u8bfb&#xff1a;<\/h4>\n<ul>\n<li>Extra: Using index condition&#xff1a;\u8fd9\u662f\u5f00\u542f ICP \u7684\u94c1\u8bc1&#xff01;\u8868\u660e\u5b58\u50a8\u5f15\u64ce\u5728\u5229\u7528\u7d22\u5f15\u8303\u56f4\u67e5\u627e\u65f6&#xff0c;\u540c\u6b65\u4e0b\u63a8\u4e86\u8fc7\u6ee4\u6761\u4ef6&#xff0c;\u5728\u7d22\u5f15\u5c42\u5254\u9664\u4e86\u4e0d\u5408\u683c\u884c&#xff1b;<\/li>\n<li>\u4e0e Using index \u7684\u6839\u672c\u533a\u522b&#xff1a;\n<ul>\n<li>Using index&#xff08;\u8986\u76d6\u7d22\u5f15&#xff09;&#xff1a;\u67e5\u8be2\u7684\u6240\u6709\u5217\u90fd\u5728\u4e8c\u7ea7\u7d22\u5f15\u91cc&#xff0c;\u5b8c\u5168\u4e0d\u9700\u8981\u56de\u8868&#xff1b;<\/li>\n<li>Using index condition&#xff08;\u7d22\u5f15\u4e0b\u63a8&#xff09;&#xff1a;\u67e5\u8be2\u7684\u5217\u8d85\u51fa\u4e86\u4e8c\u7ea7\u7d22\u5f15&#xff08;\u5982 SELECT * \u5305\u542b address&#xff09;&#xff0c;\u4f9d\u7136\u9700\u8981\u56de\u8868&#xff0c;\u4f46\u56de\u8868\u7684\u6b21\u6570\u88ab\u7d22\u5f15\u5185\u90e8\u4e0b\u63a8\u6761\u4ef6\u5927\u5e45\u88c1\u526a\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<h3>\u4e94\u3001ICP \u7684\u751f\u6548\u8fb9\u754c\u4e0e\u590d\u5408\u7d22\u5f15\u8bbe\u8ba1\u519b\u89c4<\/h3>\n<p>\u867d\u7136 ICP \u662f\u81ea\u52a8\u5f00\u542f\u7684&#xff08;\u9ed8\u8ba4\u7531\u7cfb\u7edf\u53c2\u6570 optimizer_switch&#061;&#039;index_condition_pushdown&#061;on&#039; \u63a7\u5236&#xff09;&#xff0c;\u4f46\u5b83\u5e76\u4e0d\u662f\u65e0\u6761\u4ef6\u751f\u6548\u7684&#xff0c;\u67b6\u6784\u5e08\u5728\u8bbe\u8ba1\u590d\u5408\u7d22\u5f15\u65f6\u5fc5\u987b\u7262\u8bb0\u4ee5\u4e0b\u6cd5\u5219&#xff1a;<\/p>\n<li>\u53ea\u6709\u590d\u5408\u7d22\u5f15\u4e2d\u7684\u5b57\u6bb5\u624d\u80fd\u88ab\u4e0b\u63a8&#xff1a;\u5982\u679c SQL \u6761\u4ef6\u4e2d\u5305\u542b\u4e86\u7d22\u5f15\u91cc\u6ca1\u6709\u7684\u5b57\u6bb5&#xff08;\u5982 status &#061; 1&#xff09;&#xff0c;\u7531\u4e8e\u4e8c\u7ea7\u7d22\u5f15\u4e2d\u6ca1\u6709\u8be5\u6570\u636e&#xff0c;\u5f15\u64ce\u65e0\u6cd5\u4e0b\u63a8&#xff0c;\u8be5\u5b57\u6bb5\u4f9d\u7136\u53ea\u80fd\u5728\u56de\u8868\u4e4b\u540e\u7531 Server \u5c42\u8fc7\u6ee4\u3002\u56e0\u6b64&#xff0c;\u9ad8\u9891\u7684\u8fc7\u6ee4\u5b57\u6bb5\u5c3d\u91cf\u6253\u5305\u8fdb\u590d\u5408\u7d22\u5f15&#xff1b;<\/li>\n<li>ICP \u4ec5\u9002\u7528\u4e8e\u4e8c\u7ea7\u7d22\u5f15&#xff08;Secondary Index&#xff09;&#xff1a;\u5bf9\u4e8e\u805a\u7c07\u4e3b\u952e\u7d22\u5f15&#xff0c;\u6240\u6709\u7684\u7269\u7406\u5217\u672c\u6765\u5c31\u5df2\u7ecf\u5b58\u5728\u4e8e\u540c\u4e00\u4e2a\u53f6\u5b50\u8282\u70b9\u4e0a&#xff0c;\u4e0d\u5b58\u5728\u6240\u8c13\u201c\u56de\u8868\u201d\u52a8\u4f5c&#xff0c;\u56e0\u6b64\u4e3b\u952e\u626b\u63cf\u65e0\u9700\u4e5f\u4e0d\u5b58\u5728 ICP&#xff1b;<\/li>\n<li>\u5b50\u67e5\u8be2\u4e0e\u5b58\u50a8\u8fc7\u7a0b\u4e2d\u7684\u8c13\u8bcd\u65e0\u6cd5\u4e0b\u63a8&#xff1a;\u5982\u679c\u8fc7\u6ee4\u6761\u4ef6\u6d89\u53ca\u590d\u6742\u7684\u5b50\u67e5\u8be2\u8c03\u7528&#xff0c;CBO \u65e0\u6cd5\u5c06\u4e0a\u4e0b\u6587\u5305\u88c5\u8fdb\u5b58\u50a8\u5f15\u64ce\u7684\u4e0b\u63a8\u7ed3\u6784\u4e2d\u3002<\/li>\n<hr \/>\n<h3>\u516d\u3001\u603b\u7ed3<\/h3>\n<p>\u6280\u672f\u6f14\u8fdb\u7684\u9b45\u529b&#xff0c;\u5f80\u5f80\u5c31\u9690\u85cf\u5728\u8fd9\u4e9b\u8de8\u5c42\u4ea4\u4e92\u7684\u5fae\u89c2\u4f18\u5316\u4e4b\u4e2d\u3002<\/p>\n<p>\u7d22\u5f15\u4e0b\u63a8&#xff08;ICP&#xff09;\u6253\u7834\u4e86 Server \u5c42\u4e0e\u5b58\u50a8\u5f15\u64ce\u5c42\u50f5\u5316\u7684\u804c\u8d23\u5212\u5206&#xff0c;\u7528**\u201c\u5c31\u5730\u8ba1\u7b97\u3001\u5c3d\u65e9\u526a\u679d\u201d**\u7684\u7406\u5ff5&#xff0c;\u5c06\u6d77\u91cf\u65e0\u6548\u7684\u56de\u8868\u78c1\u76d8 I\/O \u627c\u6740\u5728\u6447\u7bee\u4e4b\u4e2d\u3002\u6df1\u5165\u7406\u89e3 ICP \u7684\u5e95\u5c42\u6d41\u8f6c&#xff0c;\u6211\u4eec\u624d\u80fd\u5728\u8bbe\u8ba1\u590d\u5408\u7d22\u5f15\u65f6\u6e38\u5203\u6709\u4f59&#xff0c;\u8ba9\u5e95\u5c42\u7684\u5b58\u50a8\u5f15\u64ce\u53d1\u6325\u51fa\u6700\u5927\u7684\u541e\u5410\u6548\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\/* MD \/ \u5bcc\u6587\u672c\u4e2d\u7684 .toc\uff08\u542b\u535a\u5ba2\u56ed\u642c\u5bb6\u7b49\u5d4c\u5957\u7ed3\u6784\uff09\uff1b.toc-box \u5728\u4fa7\u680f\uff0c\u4e0d\u53d7\u5f71\u54cd *\/#content_views .toc,\/* \u7f16\u8f91\u5668\u5e38\u5728\u76ee\u5f55\u524d\u540e\u63d2\u5165\u7a7a p\uff08:empty \u4ecd\u5360 20px\uff09\uff0c\u4e00\u5e76\u53bb\u6389\u907f\u514d\u9876\u7a7a\u9699 *\/#content_views.markdown_views &gt; 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