{"id":20767,"date":"2024-01-02T05:36:21","date_gmt":"2024-01-02T05:36:21","guid":{"rendered":"https:\/\/server.hk\/blog\/20767\/"},"modified":"2024-11-14T10:39:04","modified_gmt":"2024-11-14T02:39:04","slug":"postgresql-command-drop-operator-class","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/20767\/","title":{"rendered":"PostgreSQL \u547d\u4ee4: DROP OPERATOR CLASS"},"content":{"rendered":"<h1 id=\"postgresql-command-drop-operator-class-lbTQlxyQdC\">PostgreSQL \u547d\u4ee4: DROP OPERATOR CLASS<\/h1>\n<p>PostgreSQL \u662f\u4e00\u500b\u529f\u80fd\u5f37\u5927\u7684\u958b\u6e90\u95dc\u806f\u5f0f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u591a\u7a2e\u529f\u80fd\u548c\u7279\u6027\u3002\u5176\u4e2d\u4e00\u500b\u91cd\u8981\u7684\u547d\u4ee4\u662f <code>DROP OPERATOR CLASS<\/code> \u547d\u4ee4\uff0c\u5141\u8a31\u7528\u6236\u5f9e\u6578\u64da\u5eab\u4e2d\u79fb\u9664\u64cd\u4f5c\u7b26\u985e\u5225\u3002<\/p>\n<h2 id=\"understanding-operator-classes-lbTQlxyQdC\">\u4e86\u89e3\u64cd\u4f5c\u7b26\u985e\u5225<\/h2>\n<p>\u5728 PostgreSQL \u4e2d\uff0c\u64cd\u4f5c\u7b26\u985e\u5225\u662f\u4e00\u7d44\u64cd\u4f5c\u7b26\u548c\u652f\u6301\u51fd\u6578\uff0c\u5b9a\u7fa9\u4e86\u7279\u5b9a\u6578\u64da\u985e\u578b\u5728\u7d22\u5f15\u4e2d\u7684\u884c\u70ba\u3002\u5b83\u63d0\u4f9b\u4e86\u5fc5\u8981\u7684\u4fe1\u606f\uff0c\u8b93\u67e5\u8a62\u898f\u5283\u5668\u80fd\u5920\u78ba\u5b9a\u8655\u7406\u8a72\u6578\u64da\u985e\u578b\u6642\uff0c\u57f7\u884c\u67e5\u8a62\u7684\u6700\u6709\u6548\u65b9\u5f0f\u3002<\/p>\n<p>\u64cd\u4f5c\u7b26\u985e\u5225\u5c0d\u512a\u5316\u67e5\u8a62\u6027\u80fd\u81f3\u95dc\u91cd\u8981\uff0c\u56e0\u70ba\u5b83\u5011\u5141\u8a31\u6578\u64da\u5eab\u6839\u64da\u6578\u64da\u985e\u578b\u7684\u7279\u6027\u9078\u64c7\u6700\u5408\u9069\u7684\u7d22\u5f15\u8a2a\u554f\u65b9\u6cd5\u3002PostgreSQL \u63d0\u4f9b\u4e86\u591a\u7a2e\u5167\u5efa\u64cd\u4f5c\u7b26\u985e\u5225\uff0c\u9069\u7528\u65bc\u5404\u7a2e\u6578\u64da\u985e\u578b\uff0c\u4f46\u7528\u6236\u4e5f\u53ef\u4ee5\u5275\u5efa\u81ea\u5b9a\u7fa9\u7684\u64cd\u4f5c\u7b26\u985e\u5225\uff0c\u4ee5\u6eff\u8db3\u7279\u5b9a\u9700\u6c42\u3002<\/p>\n<h2 id=\"the-drop-operator-class-command-lbTQlxyQdC\">DROP OPERATOR CLASS \u547d\u4ee4<\/h2>\n<p>PostgreSQL \u4e2d\u7684 <code>DROP OPERATOR CLASS<\/code> \u547d\u4ee4\u5141\u8a31\u7528\u6236\u5f9e\u6578\u64da\u5eab\u4e2d\u79fb\u9664\u73fe\u6709\u7684\u64cd\u4f5c\u7b26\u985e\u5225\u3002\u6b64\u547d\u4ee4\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>DROP OPERATOR CLASS [ IF EXISTS ] operator_class_name USING index_method_name;\r\n<\/code><\/pre>\n<p>\u6211\u5011\u4f86\u5206\u89e3\u9019\u500b\u8a9e\u6cd5\uff1a<\/p>\n<ul>\n<li><code>IF EXISTS<\/code>\uff08\u53ef\u9078\uff09\uff1a\u6b64\u5b50\u53e5\u5141\u8a31\u5373\u4f7f\u6307\u5b9a\u7684\u64cd\u4f5c\u7b26\u985e\u5225\u4e0d\u5b58\u5728\uff0c\u547d\u4ee4\u4e5f\u80fd\u6210\u529f\u57f7\u884c\u3002<\/li>\n<li><code>operator_class_name<\/code>\uff1a\u6307\u5b9a\u8981\u522a\u9664\u7684\u64cd\u4f5c\u7b26\u985e\u5225\u7684\u540d\u7a31\u3002<\/li>\n<li><code>USING index_method_name<\/code>\uff1a\u6307\u5b9a\u8207\u8a72\u64cd\u4f5c\u7b26\u985e\u5225\u76f8\u95dc\u7684\u7d22\u5f15\u65b9\u6cd5\u540d\u7a31\u3002<\/li>\n<\/ul>\n<p>\u5728\u57f7\u884c <code>DROP OPERATOR CLASS<\/code> \u547d\u4ee4\u6642\uff0c\u8acb\u6ce8\u610f\u8a72\u64cd\u4f5c\u7b26\u985e\u5225\u4e0d\u5f97\u8207\u4efb\u4f55\u7d22\u5f15\u6216\u6578\u64da\u985e\u578b\u76f8\u95dc\u806f\u3002\u5982\u679c\u5b58\u5728\u4f9d\u8cf4\u95dc\u4fc2\uff0c\u547d\u4ee4\u5c07\u5931\u6557\uff0c\u7528\u6236\u9700\u8981\u5148\u89e3\u6c7a\u9019\u4e9b\u4f9d\u8cf4\u95dc\u4fc2\uff0c\u7136\u5f8c\u518d\u5617\u8a66\u522a\u9664\u64cd\u4f5c\u7b26\u985e\u5225\u3002<\/p>\n<h2 id=\"examples-lbTQlxyQdC\">\u793a\u4f8b<\/h2>\n<p>\u8b93\u6211\u5011\u901a\u904e\u4e00\u500b\u5be6\u969b\u793a\u4f8b\u4f86\u8aaa\u660e <code>DROP OPERATOR CLASS<\/code> \u547d\u4ee4\u7684\u4f7f\u7528\uff1a<\/p>\n<pre><code>DROP OPERATOR CLASS int4_ops USING btree;\r\n<\/code><\/pre>\n<p>\u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u6b63\u5728\u522a\u9664\u4e00\u500b\u540d\u70ba <code>int4_ops<\/code> \u7684\u64cd\u4f5c\u7b26\u985e\u5225\uff0c\u8a72\u985e\u5225\u4f7f\u7528 <code>btree<\/code> \u7d22\u5f15\u65b9\u6cd5\u3002\u5982\u679c\u8a72\u64cd\u4f5c\u7b26\u985e\u5225\u5b58\u5728\u4e14\u672a\u8207\u4efb\u4f55\u7d22\u5f15\u6216\u6578\u64da\u985e\u578b\u76f8\u95dc\u806f\uff0c\u5b83\u5c07\u6703\u6210\u529f\u5730\u5f9e\u6578\u64da\u5eab\u4e2d\u79fb\u9664\u3002<\/p>\n<h2 id=\"summary-lbTQlxyQdC\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL \u4e2d\u7684 <code>DROP OPERATOR CLASS<\/code> \u547d\u4ee4\u5141\u8a31\u7528\u6236\u5f9e\u6578\u64da\u5eab\u4e2d\u79fb\u9664\u64cd\u4f5c\u7b26\u985e\u5225\u3002\u64cd\u4f5c\u7b26\u985e\u5225\u5728\u512a\u5316\u67e5\u8a62\u6027\u80fd\u65b9\u9762\u626e\u6f14\u8457\u91cd\u8981\u89d2\u8272\uff0c\u901a\u904e\u5b9a\u7fa9\u7279\u5b9a\u6578\u64da\u985e\u578b\u5728\u7d22\u5f15\u4e2d\u7684\u884c\u70ba\uff0c\u5e6b\u52a9\u6578\u64da\u5eab\u9ad8\u6548\u904b\u884c\u3002\u4f7f\u7528 <code>DROP OPERATOR CLASS<\/code> \u547d\u4ee4\uff0c\u7528\u6236\u53ef\u4ee5\u6709\u6548\u7ba1\u7406\u5176\u64cd\u4f5c\u7b26\u985e\u5225\uff0c\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u6700\u4f73\u6027\u80fd\u3002<\/p>\n<p>\u60f3\u4e86\u89e3\u66f4\u591a\u95dc\u65bc VPS \u8a17\u7ba1\u7684\u4fe1\u606f\u4ee5\u53ca\u5b83\u5982\u4f55\u63d0\u5347\u60a8\u7684\u696d\u52d9\uff0c\u8acb\u8a2a\u554f <a href=\"https:\/\/server.hk\">Server.HK<\/a>\u3002\u6211\u5011\u7684 VPS \u89e3\u6c7a\u65b9\u6848\u4e00\u6d41\uff0c\u5c08\u70ba\u6eff\u8db3\u60a8\u7684\u7279\u5b9a\u8a17\u7ba1\u9700\u6c42\u800c\u8a2d\u8a08\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PostgreSQL \u547d\u4ee4: D&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-20767","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20767","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=20767"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20767\/revisions"}],"predecessor-version":[{"id":24344,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20767\/revisions\/24344"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=20767"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=20767"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=20767"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}