{"id":15755,"date":"2023-12-04T22:16:51","date_gmt":"2023-12-04T14:16:51","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=15755"},"modified":"2023-12-04T22:26:01","modified_gmt":"2023-12-04T14:26:01","slug":"oracle-zhong-ru-he-shi-yong-cbocbo-yu-rule-de-qu-b","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/oracle-zhong-ru-he-shi-yong-cbocbo-yu-rule-de-qu-b\/","title":{"rendered":"Oracle \u4e2d\u5982\u4f55\u4f7f\u7528 CBO\uff0cCBO \u4e0e RULE \u7684\u533a\u522b\uff1f"},"content":{"rendered":"<p>CBO\uff08Cost-Based Optimizer\uff09\u548c RULE \u4f18\u5316\u5668\u662f Oracle \u6570\u636e\u5e93\u4e2d\u4e24\u79cd\u4e0d\u540c\u7684\u67e5\u8be2\u4f18\u5316\u5668\u3002<\/p>\n<ol>\n<li>\n<strong>CBO\uff08Cost-Based Optimizer\uff09\uff1a<\/strong><\/p>\n<ul>\n<li><strong>\u5de5\u4f5c\u539f\u7406\uff1a<\/strong> \u57fa\u4e8e\u6210\u672c\u4f30\u7b97\uff0c\u8003\u8651\u67e5\u8be2\u7684\u590d\u6742\u5ea6\u3001\u7edf\u8ba1\u4fe1\u606f\u548c\u7cfb\u7edf\u8d44\u6e90\u7b49\u591a\u4e2a\u56e0\u7d20\uff0c\u9009\u62e9\u6210\u672c\u6700\u4f4e\u7684\u6267\u884c\u8ba1\u5212\u3002<\/li>\n<li><strong>\u4f7f\u7528\u65b9\u6cd5\uff1a<\/strong> \u662f Oracle \u7684\u9ed8\u8ba4\u4f18\u5316\u5668\uff0c\u4e00\u822c\u60c5\u51b5\u4e0b\u65e0\u9700\u989d\u5916\u914d\u7f6e\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e <code>OPTIMIZER_MODE<\/code> \u53c2\u6570\u4e3a <code>CHOOSE<\/code> \u6216\u5176\u4ed6\u9002\u5f53\u7684\u503c\u6765\u4f7f\u7528 CBO\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>RULE \u4f18\u5316\u5668\uff1a<\/strong><\/p>\n<ul>\n<li><strong>\u5de5\u4f5c\u539f\u7406\uff1a<\/strong> \u57fa\u4e8e\u7b80\u5355\u7684\u542f\u53d1\u5f0f\u89c4\u5219\uff0c\u4e0d\u8003\u8651\u7edf\u8ba1\u4fe1\u606f\uff0c\u76f4\u63a5\u4f9d\u8d56\u4e8e\u9884\u5b9a\u4e49\u7684\u89c4\u5219\u751f\u6210\u6267\u884c\u8ba1\u5212\u3002<\/li>\n<li><strong>\u4f7f\u7528\u65b9\u6cd5\uff1a<\/strong> \u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e <code>OPTIMIZER_MODE<\/code> \u53c2\u6570\u4e3a <code>RULE<\/code> \u6765\u5f3a\u5236\u4f7f\u7528 RULE \u4f18\u5316\u5668\u3002\u4e0d\u9700\u8981\u6536\u96c6\u8868\u548c\u7d22\u5f15\u7684\u7edf\u8ba1\u4fe1\u606f\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>\u603b\u4f53\u800c\u8a00\uff0cCBO\u63d0\u4f9b\u66f4\u9ad8\u7ea7\u3001\u66f4\u7cbe\u786e\u7684\u4f18\u5316\uff0c\u800cRULE\u5219\u66f4\u4e3a\u7b80\u5355\uff0c\u901a\u5e38\u5728\u7279\u6b8a\u60c5\u51b5\u4e0b\u4f7f\u7528\u3002\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u63a8\u8350\u4f7f\u7528CBO\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CBO\uff08Cost-Based Optimizer\uff09\u548c RULE \u4f18\u5316\u5668\u662f Oracle \u6570\u636e\u5e93\u4e2d\u4e24\u79cd\u4e0d\u540c\u7684\u67e5\u8be2 [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[120],"tags":[],"class_list":["post-15755","post","type-post","status-publish","format-standard","hentry","category-oracel"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15755","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=15755"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15755\/revisions"}],"predecessor-version":[{"id":15756,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15755\/revisions\/15756"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=15755"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=15755"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=15755"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}