{"id":20771,"date":"2024-01-02T05:40:24","date_gmt":"2024-01-02T05:40:24","guid":{"rendered":"https:\/\/server.hk\/blog\/20771\/"},"modified":"2024-11-14T10:38:59","modified_gmt":"2024-11-14T02:38:59","slug":"postgresql-command-drop-rule","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/20771\/","title":{"rendered":"PostgreSQL \u547d\u4ee4: DROP RULE"},"content":{"rendered":"

PostgreSQL \u547d\u4ee4: DROP RULE<\/h1>\n

PostgreSQL \u662f\u4e00\u500b\u529f\u80fd\u5f37\u5927\u7684\u958b\u6e90\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u5ee3\u6cdb\u7684\u529f\u80fd\u548c\u7279\u6027\u3002\u5176\u4e2d\u4e00\u500b\u91cd\u8981\u7684\u547d\u4ee4\u662f DROP RULE<\/code> \u547d\u4ee4\uff0c\u5b83\u5141\u8a31\u7528\u6236\u5f9e\u8868\u6216\u6a21\u5f0f\u4e2d\u79fb\u9664\u898f\u5247\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u5c07\u8a73\u7d30\u63a2\u8a0e DROP RULE<\/code> \u547d\u4ee4\u53ca\u5176\u6709\u6548\u4f7f\u7528\u65b9\u6cd5\u3002<\/p>\n

\u7406\u89e3 PostgreSQL \u4e2d\u7684\u898f\u5247<\/h2>\n

\u5728 PostgreSQL \u4e2d\uff0c\u898f\u5247\u662f\u4e00\u7a2e\u5728\u7279\u5b9a\u689d\u4ef6\u6eff\u8db3\u6642\u5b9a\u7fa9\u8981\u57f7\u884c\u7684\u52d5\u4f5c\u7684\u65b9\u6cd5\u3002\u5b83\u5011\u985e\u4f3c\u65bc\u89f8\u767c\u5668\uff0c\u4f46\u904b\u4f5c\u65bc\u66f4\u9ad8\u7684\u5c64\u7d1a\u3002\u898f\u5247\u53ef\u4ee5\u5728\u8868\u5c64\u7d1a\u6216\u6a21\u5f0f\u5c64\u7d1a\u5b9a\u7fa9\uff0c\u4e26\u53ef\u7528\u65bc\u4fee\u6539\u67e5\u8a62\u3001\u63d2\u5165\u6216\u66f4\u65b0\u6578\u64da\u6216\u57f7\u884c\u5176\u4ed6\u64cd\u4f5c\u3002<\/p>\n

\u898f\u5247\u7531\u5169\u90e8\u5206\u7d44\u6210\uff1a\u4e8b\u4ef6\u548c\u52d5\u4f5c\u3002\u4e8b\u4ef6\u6307\u5b9a\u89f8\u767c\u898f\u5247\u7684\u689d\u4ef6\uff0c\u800c\u52d5\u4f5c\u5b9a\u7fa9\u7576\u689d\u4ef6\u6eff\u8db3\u6642\u61c9\u8a72\u57f7\u884c\u7684\u64cd\u4f5c\u3002\u898f\u5247\u53ef\u4ee5\u4f7f\u7528 CREATE RULE<\/code> \u547d\u4ee4\u4f86\u5b9a\u7fa9\u3002<\/p>\n

\u4f7f\u7528 DROP RULE \u547d\u4ee4<\/h2>\n

DROP RULE<\/code> \u547d\u4ee4\u5141\u8a31\u7528\u6236\u5f9e\u8868\u6216\u6a21\u5f0f\u4e2d\u79fb\u9664\u898f\u5247\u3002DROP RULE<\/code> \u547d\u4ee4\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n

DROP RULE [ IF EXISTS ] rule_name ON table_name [ CASCADE | RESTRICT ];\r\n<\/code><\/pre>\n
IF EXISTS<\/code> \u5b50\u53e5\u662f\u53ef\u9078\u7684\uff0c\u5141\u8a31\u547d\u4ee4\u5728\u898f\u5247\u4e0d\u5b58\u5728\u6642\u4ecd\u7136\u6210\u529f\u57f7\u884c\u3002rule_name<\/code> \u6307\u5b9a\u8981\u522a\u9664\u7684\u898f\u5247\u540d\u7a31\uff0c\u800c table_name<\/code> \u6307\u5b9a\u8981\u5f9e\u4e2d\u522a\u9664\u898f\u5247\u7684\u8868\u540d\u3002<\/p>\n
CASCADE<\/code> \u9078\u9805\u7528\u65bc\u81ea\u52d5\u522a\u9664\u4efb\u4f55\u4f9d\u8cf4\u65bc\u8a72\u898f\u5247\u7684\u5c0d\u8c61\uff0c\u4f8b\u5982\u8996\u5716\u6216\u5176\u4ed6\u898f\u5247\u3002\u53e6\u4e00\u65b9\u9762\uff0cRESTRICT<\/code> \u9078\u9805\u5247\u9632\u6b62\u5728\u6709\u4efb\u4f55\u4f9d\u8cf4\u5c0d\u8c61\u7684\u60c5\u6cc1\u4e0b\u522a\u9664\u898f\u5247\u3002<\/p>\n
\u793a\u4f8b<\/h2>\n
\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba update_price_rule<\/code> \u7684\u898f\u5247\uff0c\u5b9a\u7fa9\u5728\u540d\u70ba products<\/code> \u7684\u8868\u4e0a\u3002\u8981\u522a\u9664\u6b64\u898f\u5247\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n
DROP RULE update_price_rule ON products;\r\n<\/code><\/pre>\n
\u5982\u679c\u6211\u5011\u53ea\u60f3\u5728\u898f\u5247\u5b58\u5728\u7684\u60c5\u6cc1\u4e0b\u522a\u9664\u5b83\uff0c\u53ef\u4ee5\u5c07\u547d\u4ee4\u4fee\u6539\u70ba\uff1a<\/p>\n
DROP RULE IF EXISTS update_price_rule ON products;\r\n<\/code><\/pre>\n
\u5982\u679c\u8a72\u898f\u5247\u6709\u4f9d\u8cf4\u5c0d\u8c61\uff0c\u4f8b\u5982\u8996\u5716\u6216\u5176\u4ed6\u898f\u5247\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 CASCADE<\/code> \u9078\u9805\u81ea\u52d5\u522a\u9664\u5b83\u5011\uff1a<\/p>\n
DROP RULE update_price_rule ON products CASCADE;\r\n<\/code><\/pre>\n
\u6216\u8005\uff0c\u5982\u679c\u6211\u5011\u5e0c\u671b\u5728\u6709\u4efb\u4f55\u4f9d\u8cf4\u5c0d\u8c61\u7684\u60c5\u6cc1\u4e0b\u9632\u6b62\u522a\u9664\u898f\u5247\uff0c\u53ef\u4ee5\u4f7f\u7528 RESTRICT<\/code> \u9078\u9805\uff1a<\/p>\n
DROP RULE update_price_rule ON products RESTRICT;\r\n<\/code><\/pre>\n
\u7e3d\u7d50<\/h2>\n
PostgreSQL \u4e2d\u7684 DROP RULE<\/code> \u547d\u4ee4\u5141\u8a31\u7528\u6236\u5f9e\u8868\u6216\u6a21\u5f0f\u4e2d\u79fb\u9664\u898f\u5247\u3002\u898f\u5247\u662f PostgreSQL \u4e2d\u4e00\u500b\u5f37\u5927\u7684\u529f\u80fd\uff0c\u53ef\u4ee5\u7528\u4f86\u6839\u64da\u7279\u5b9a\u689d\u4ef6\u5b9a\u7fa9\u52d5\u4f5c\u3002\u901a\u904e\u4f7f\u7528 DROP RULE<\/code> \u547d\u4ee4\uff0c\u7528\u6236\u53ef\u4ee5\u6839\u64da\u9700\u8981\u8f15\u9b06\u7ba1\u7406\u548c\u4fee\u6539\u5176\u898f\u5247\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u53ef\u9760\u7684\u9999\u6e2f VPS \u8a17\u7ba1\u63d0\u4f9b\u5546\uff0c\u8003\u616e Server.HK<\/a>\u3002Server.HK \u63d0\u4f9b\u4e00\u6d41\u7684 VPS \u89e3\u6c7a\u65b9\u6848\u548c\u512a\u79c0\u7684\u5ba2\u6236\u652f\u6301\uff0c\u662f\u6eff\u8db3\u60a8\u8a17\u7ba1\u9700\u6c42\u7684\u5b8c\u7f8e\u9078\u64c7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
PostgreSQL \u547d\u4ee4: D...<\/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-20771","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20771","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=20771"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20771\/revisions"}],"predecessor-version":[{"id":24333,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20771\/revisions\/24333"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=20771"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=20771"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=20771"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}