{"id":201078,"date":"2025-05-06T13:28:23","date_gmt":"2025-05-06T05:28:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201078\/"},"modified":"2025-05-06T13:28:23","modified_gmt":"2025-05-06T05:28:23","slug":"mysql-explain-%e4%b8%ad-filtered-%e5%ad%97%e6%ae%b5%e7%9a%84%e7%9c%9f%e5%ae%9e%e5%90%ab%e4%b9%89%ef%bc%9a%e5%80%bc%e8%b6%8a%e5%a4%a7%e8%b6%8a%e5%a5%bd%e8%bf%98%e6%98%af%e8%b6%8a%e5%b0%8f%e8%b6%8a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201078\/","title":{"rendered":"MySQL EXPLAIN \u4e2d filtered \u5b57\u6bb5\u7684\u771f\u5b9e\u542b\u4e49\uff1a\u503c\u8d8a\u5927\u8d8a\u597d\u8fd8\u662f\u8d8a\u5c0f\u8d8a\u597d\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

MySQL EXPLAIN \u4e2d filtered \u5b57\u6bb5\u7684\u771f\u5b9e\u542b\u4e49\uff1a\u503c\u8d8a\u5927\u8d8a\u597d\u8fd8\u662f\u8d8a\u5c0f\u8d8a\u597d\uff1f<\/h1>\n<\/p>\n

<\/p>\n

MySQL EXPLAIN \u4e2d filtered \u5b57\u6bb5\u7684\u8bef\u89e3<\/strong><\/p>\n

EXPLAIN \u547d\u4ee4\u662f MySQL \u4e2d\u7528\u4e8e\u5206\u6790\u67e5\u8be2\u6267\u884c\u8ba1\u5212\u7684\u91cd\u8981\u5de5\u5177\u3002\u5176\u4e2d\uff0cfiltered \u5b57\u6bb5\u5f15\u8d77\u4e86\u5f88\u591a\u56f0\u60d1\u3002\u6709\u8bf4\u6cd5\u79f0 filtered \u5b57\u6bb5\u503c\u8d8a\u5c0f\u8d8a\u597d\uff0c\u4f46\u5b9e\u9645\u60c5\u51b5\u5e76\u975e\u5982\u6b64\u3002<\/p>\n

filtered \u5b57\u6bb5\u7684\u771f\u5b9e\u542b\u4e49<\/strong><\/p>\n

filtered \u5b57\u6bb5\u8868\u793a\u5b58\u50a8\u5f15\u64ce\u8fd4\u56de\u7684\u6570\u636e\u5728\u670d\u52a1\u5668\u5c42\u8fc7\u6ee4\u540e\uff0c\u5269\u4f59\u6ee1\u8db3\u67e5\u8be2\u6761\u4ef6\u7684\u8bb0\u5f55\u6570\u91cf\u5360\u603b\u8bb0\u5f55\u6570\u91cf\u7684\u767e\u5206\u6bd4\u3002\u56e0\u6b64\uff0c\u66f4\u9ad8\u7684 filtered \u503c\u610f\u5473\u7740\u8fc7\u6ee4\u6389\u7684\u8bb0\u5f55\u66f4\u5c11\u3002<\/p>\n

\u4e3a\u4ec0\u4e48 filtered \u503c\u8d8a\u5927\u8d8a\u597d<\/strong><\/p>\n

\u5f53 filtered \u503c\u8f83\u5927\u65f6\uff0c\u8868\u793a\u5b58\u50a8\u5f15\u64ce\u8fd4\u56de\u7684\u6570\u636e\u4e2d\u6ee1\u8db3\u67e5\u8be2\u6761\u4ef6\u7684\u8bb0\u5f55\u6bd4\u4f8b\u8f83\u9ad8\u3002\u8fd9\u901a\u5e38\u8868\u660e\u7d22\u5f15\u5229\u7528\u826f\u597d\uff0c\u5e76\u4e14\u5b58\u50a8\u5f15\u64ce\u6709\u6548\u5730\u6267\u884c\u4e86\u8fc7\u6ee4\u64cd\u4f5c\u3002<\/p>\n

\u4e3a\u4ec0\u4e48 filtered \u503c\u5f88\u5c0f\u4e0d\u4e00\u5b9a\u8868\u660e\u7d22\u5f15\u95ee\u9898<\/strong><\/p>\n

\u7136\u800c\uff0cfiltered \u503c\u5f88\u5c0f\u5e76\u4e0d\u4e00\u5b9a\u610f\u5473\u7740\u7d22\u5f15\u4e0d\u597d\u6216\u5b58\u50a8\u5f15\u64ce\u6548\u7387\u4f4e\u3002\u5b83\u53ea\u8868\u660e\u8fc7\u6ee4\u6389\u7684\u8bb0\u5f55\u6bd4\u4f8b\u8f83\u5927\u3002\u8fd9\u53ef\u80fd\u662f\u7531\u4e8e\u67e5\u8be2\u6761\u4ef6\u9650\u5236\u5bfc\u81f4\u7684\uff0c\u6216\u8005\u53ef\u80fd\u662f\u7531\u4e8e\u4f7f\u7528\u4e86\u7d22\u5f15\u8986\u76d6\u6a21\u5f0f\u800c\u65e0\u9700\u4ece\u8868\u4e2d\u8bfb\u53d6\u989d\u5916\u6570\u636e\u3002<\/p>\n

\u7ed3\u8bed<\/strong><\/p>\n

\u56e0\u6b64\uff0c\u5728\u8bc4\u4f30 EXPLAIN \u7ed3\u679c\u65f6\uff0c\u91cd\u8981\u7684\u662f\u8981\u8003\u8651 filtered \u5b57\u6bb5\u7684\u5b9e\u9645\u542b\u4e49\u3002\u867d\u7136\u8f83\u5927\u7684 filtered \u503c\u901a\u5e38\u662f\u53ef\u53d6\u7684\uff0c\u4f46\u5b83\u5e76\u4e0d\u662f\u552f\u4e00\u51b3\u5b9a\u7d22\u5f15\u6548\u7387\u7684\u56e0\u7d20\u3002\u9700\u8981\u6839\u636e\u5177\u4f53\u60c5\u51b5\u8fdb\u884c\u5206\u6790\uff0c\u4ee5\u786e\u5b9a\u7d22\u5f15\u662f\u5426\u6b63\u5728\u6709\u6548\u5730\u7528\u4e8e\u63d0\u5347\u67e5\u8be2\u6027\u80fd\u3002<\/p>\n

\u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\u4e3b\u673a\u5b9d\u8d1d\uff01\u66f4\u591a\u5173\u4e8e\u6570\u636e\u5e93\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\u3002<\/p>\n

\n
\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"

MySQL EXPLAIN \u4e2d ...<\/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-201078","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201078","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=201078"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201078\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201078"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201078"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201078"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}