{"id":2923,"date":"2017-03-02T15:58:04","date_gmt":"2017-03-02T07:58:04","guid":{"rendered":"https:\/\/yanjingang.com\/blog\/?p=2923"},"modified":"2019-08-01T16:10:23","modified_gmt":"2019-08-01T08:10:23","slug":"mysql-icp%e7%b4%a2%e5%bc%95%e4%b8%8b%e6%8e%a8index-condition-pushdown","status":"publish","type":"post","link":"https:\/\/yanjingang.com\/blog\/?p=2923","title":{"rendered":"mysql ICP\u7d22\u5f15\u4e0b\u63a8(Index Condition Pushdown)"},"content":{"rendered":"<h2><strong>\u6982\u8ff0<\/strong><\/h2>\n<p>Index Condition Pushdown (ICP)\u662fMySQL\u7528\u7d22\u5f15\u53bb\u8868\u91cc\u53d6\u6570\u636e\u7684\u4e00\u79cd\u4f18\u5316\u3002\u5982\u679c\u7981\u7528ICP\uff0c\u5f15\u64ce\u5c42\u4f1a\u7a7f\u8fc7\u7d22\u5f15\u5728\u57fa\u8868\u4e2d\u5bfb\u627e\u6570\u636e\u884c\uff0c\u7136\u540e\u8fd4\u56de\u7ed9MySQL Server\u5c42\uff0c\u518d\u53bb\u4e3a\u8fd9\u4e9b\u6570\u636e\u884c\u8fdb\u884cWHERE\u540e\u7684\u6761\u4ef6\u7684\u8fc7\u6ee4\u3002ICP\u542f\u7528\uff0c\u5982\u679c\u90e8\u5206WHERE\u6761\u4ef6\u80fd\u4f7f\u7528\u7d22\u5f15\u4e2d\u7684\u5b57\u6bb5<span id=\"result_box\" lang=\"zh-CN\"><\/span>\uff0cMySQL Server \u4f1a\u628a\u8fd9\u90e8\u5206\u4e0b\u63a8\u5230\u5f15\u64ce\u5c42\u3002<span id=\"result_box\" class=\"short_text\" lang=\"zh-CN\">\u5b58\u50a8\u5f15\u64ce\u901a\u8fc7\u4f7f\u7528\u7d22\u5f15\u6761\u76ee\uff0c\u7136\u540e\u63a8\u7d22\u5f15\u6761\u4ef6\u8fdb\u884c\u8bc4\u4f30\uff0c\u4f7f\u7528\u8fd9\u4e2a\u7d22\u5f15\u628a\u6ee1\u8db3\u7684\u884c\u4ece\u8868\u4e2d\u8bfb\u53d6\u51fa\u3002ICP\u80fd\u51cf\u5c11\u5f15\u64ce\u5c42\u8bbf\u95ee\u57fa\u8868\u7684\u6b21\u6570\u548cMySQL Server \u8bbf\u95ee\u5b58\u50a8\u5f15\u64ce\u7684\u6b21\u6570\u3002<\/span>\u603b\u4e4b\u662f ICP\u7684\u4f18\u5316\u5728\u5f15\u64ce\u5c42\u5c31\u80fd\u591f\u8fc7\u6ee4\u6389\u5927\u91cf\u7684\u6570\u636e\uff0c\u8fd9\u6837\u65e0\u7591\u80fd\u591f\u51cf\u5c11\u4e86\u5bf9base table\u548cmysql server\u7684\u8bbf\u95ee\u6b21\u6570\u3002<\/p>\n<p>ICP\u7684\u4f18\u5316\u7528\u4e8erange, ref, eq_ref, and ref_or_null\u8bbf\u95ee\u65b9\u6cd5\uff0c\u5f53\u8fd9\u4e9b\u9700\u8981\u8bbf\u95ee\u5168\u8868\u7684\u884c\u3002\u8fd9\u4e2a\u7b56\u7565\u53ef\u4ee5\u7528\u4e8eINNODB\u548cMyISAM\u8868\u3002<\/p>\n<h2><strong>\u793a\u4f8b<\/strong><\/h2>\n<p>\u8868orders\uff1a<\/p>\n<p>CREATE TABLE orders (<\/p>\n<p>order_id INT NOT NULL PRIMARY KEY,<\/p>\n<p>customer_id INT,<\/p>\n<p>value INT,<\/p>\n<p>order_date DATE,<\/p>\n<p>KEY idx_custid_value (customer_id, value)<\/p>\n<p>);<\/p>\n<p>query \uff1a select * fromorders where customer_id&lt;4 and value=290;<\/p>\n<p><strong>\u5728\u6ca1\u6709ICP\u4e4b\u524d\u5b83\u662f\u8fd9\u6837\u6267\u884c\u7684\uff1a<\/strong><\/p>\n<p>1. \u4ece\u7d22\u5f15idx_custid_value\u7d22\u5f15\u91cc\u9762\u53d6\u51fa<span style=\"color: #000000;\">\u4e0b\u4e00\u6761<\/span>customer_id&lt;4\u7684\u8bb0\u5f55\uff0c\u7136\u540e\u5229\u7528\u4e3b\u952e\u5b57\u6bb5\u8bfb\u53d6\u6574\u4e2a\u884c<\/p>\n<p>2. \u7136\u540e\u5bf9\u8fd9\u4e2a\u5b8c\u6574\u7684\u884c\u5229\u7528value=290\u8fd9\u4e2a\u8fdb\u884c\u5224\u65ad\u770b\u662f\u5426\u7b26\u5408\u6761\u4ef6<\/p>\n<p>3. \u4ece1\u5f00\u59cb\u91cd\u590d\u8fd9\u4e2a\u8fc7\u7a0b<\/p>\n<p><strong>\u6709\u4e86ICP\u4e4b\u540e\u5219\u662f\u8fd9\u6837\u6267\u884c\u7684\uff1a<\/strong><\/p>\n<p>1. \u4ece\u7d22\u5f15idx_custid_value\u7d22\u5f15\u91cc\u9762\u53d6\u51fa<span style=\"color: #000000;\">\u4e0b\u4e00\u6761<\/span>customer_id&lt;4\u7684\u8bb0\u5f55\uff0c\u7136\u540e\u5229\u7528\u7d22\u5f15\u8bb0\u5f55\u5224\u65ad\u662f\u5426value=290\uff0c\u5982\u679c\u5339\u914d\u6267\u884c\u7b2c2\u6b65\uff0c\u5426\u5219\u7b2c3\u6b65<\/p>\n<p>2. \u4f7f\u7528\u7b26\u5408\u6761\u4ef6\u7684\u6570\u636eorder_id\u53bb\u4e3b\u952e\u7d22\u5f15\u91cc\u9762\u627e\u5230\u8fd9\u4e2a\u5b8c\u6574\u884c<\/p>\n<p>3. \u4ece1\u5f00\u59cb\u91cd\u590d\u8fd9\u4e2a\u8fc7\u7a0b<\/p>\n<p>&nbsp;<\/p>\n<div id=\"cnblogs_post_body\" class=\"blogpost-body\">\n<h2>ICP\u7684\u9650\u5236<\/h2>\n<p>1. \u5f53sql\u9700\u8981\u5168\u8868\u8bbf\u95ee\u65f6,ICP\u7684\u4f18\u5316\u7b56\u7565\u53ef\u7528\u4e8erange, ref, eq_ref,\u00a0 ref_or_null \u7c7b\u578b\u7684\u8bbf\u95ee\u6570\u636e\u65b9\u6cd5 \u3002<br \/>\n2. \u652f\u6301InnoDB\u548cMyISAM\u8868\u3002<br \/>\n3. ICP\u53ea\u80fd\u7528\u4e8e\u4e8c\u7ea7\u7d22\u5f15\uff0c\u4e0d\u80fd\u7528\u4e8e\u4e3b\u7d22\u5f15\u3002<br \/>\n4. \u5e76\u975e\u5168\u90e8where\u6761\u4ef6\u90fd\u53ef\u4ee5\u7528ICP\u7b5b\u9009\u3002<br \/>\n\u5982\u679cwhere\u6761\u4ef6\u7684\u5b57\u6bb5\u4e0d\u5728\u7d22\u5f15\u5217\u4e2d,\u8fd8\u662f\u8981\u8bfb\u53d6\u6574\u8868\u7684\u8bb0\u5f55\u5230server\u7aef\u505awhere\u8fc7\u6ee4\u3002<br \/>\n5. ICP\u7684\u52a0\u901f\u6548\u679c\u53d6\u51b3\u4e8e\u5728\u5b58\u50a8\u5f15\u64ce\u5185\u901a\u8fc7ICP\u7b5b\u9009\u6389\u7684\u6570\u636e\u7684\u6bd4\u4f8b\u3002<br \/>\n6. 5.6 \u7248\u672c\u7684\u4e0d\u652f\u6301\u5206\u8868\u7684ICP \u529f\u80fd\uff0c5.7 \u7248\u672c\u7684\u5f00\u59cb\u652f\u6301\u3002<br \/>\n7. \u5f53sql \u4f7f\u7528\u8986\u76d6\u7d22\u5f15\u65f6\uff0c\u4e0d\u652f\u6301ICP \u4f18\u5316\u65b9\u6cd5\u3002<br \/>\n\u53c2\u8003\uff1ahttps:\/\/www.cnblogs.com\/zhoujinyi\/archive\/2013\/04\/16\/3016223.html<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8ff0 Index Condition Pushdown (ICP)\u662fMySQL\u7528\u7d22\u5f15\u53bb\u8868\u91cc\u53d6\u6570\u636e\u7684\u4e00\u79cd\u4f18\u5316\u3002\u5982 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[7],"tags":[853,8,854],"_links":{"self":[{"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/2923"}],"collection":[{"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2923"}],"version-history":[{"count":0,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/2923\/revisions"}],"wp:attachment":[{"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2923"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2923"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2923"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}