{"id":178820,"date":"2024-11-08T21:10:27","date_gmt":"2024-11-08T13:10:27","guid":{"rendered":"https:\/\/server.hk\/cnblog\/178820\/"},"modified":"2024-11-08T21:10:28","modified_gmt":"2024-11-08T13:10:28","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9postgresql%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc%ef%bc%9a23514-check_violation%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/178820\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a23514 – check_violation\uff1f"},"content":{"rendered":"

\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a23514 – check_violation<\/h1>\n

\u5728\u4f7f\u7528PostgreSQL\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u4ee3\u78bc\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u932f\u8aa4\u4ee3\u78bc23514\uff0c\u9019\u662f\u4e00\u500b\u8207\u6aa2\u67e5\u7d04\u675f\uff08check constraint\uff09\u9055\u53cd\u6709\u95dc\u7684\u932f\u8aa4\u3002\u7576\u6578\u64da\u63d2\u5165\u6216\u66f4\u65b0\u6642\uff0c\u5982\u679c\u4e0d\u7b26\u5408\u5b9a\u7fa9\u7684\u6aa2\u67e5\u7d04\u675f\uff0cPostgreSQL\u5c07\u6703\u8fd4\u56de\u6b64\u932f\u8aa4\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u8b58\u5225\u548c\u4fee\u5fa9\u6b64\u932f\u8aa4\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u6aa2\u67e5\u7d04\u675f\uff1f<\/h2>\n

\u6aa2\u67e5\u7d04\u675f\u662f\u4e00\u7a2e\u7528\u65bc\u9650\u5236\u6578\u64da\u5217\u4e2d\u53ef\u63a5\u53d7\u503c\u7684\u898f\u5247\u3002\u5b83\u5011\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6709\u4e00\u500b\u540d\u70ba\u201cemployees\u201d\u7684\u8868\uff0c\u5176\u4e2d\u6709\u4e00\u500b\u201cage\u201d\u5217\uff0c\u60a8\u53ef\u4ee5\u8a2d\u7f6e\u4e00\u500b\u6aa2\u67e5\u7d04\u675f\uff0c\u78ba\u4fdd\u5e74\u9f61\u5fc5\u9808\u5927\u65bc0\uff1a<\/p>\n

CREATE TABLE employees (\n    id SERIAL PRIMARY KEY,\n    name VARCHAR(100),\n    age INT CHECK (age > 0)\n);<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u5982\u679c\u5617\u8a66\u63d2\u5165\u4e00\u500b\u5e74\u9f61\u70ba\u8ca0\u6578\u7684\u8a18\u9304\uff0cPostgreSQL\u5c07\u8fd4\u56de\u932f\u8aa4\u4ee3\u78bc23514\u3002<\/p>\n
\u5982\u4f55\u8b58\u5225\u932f\u8aa4\u4ee3\u78bc23514<\/h2>\n
\u7576\u60a8\u9047\u5230\u932f\u8aa4\u4ee3\u78bc23514\u6642\uff0cPostgreSQL\u6703\u63d0\u4f9b\u4e00\u689d\u932f\u8aa4\u6d88\u606f\uff0c\u901a\u5e38\u6703\u5305\u542b\u9055\u53cd\u7684\u7d04\u675f\u540d\u7a31\u3002\u9019\u53ef\u4ee5\u5e6b\u52a9\u60a8\u5feb\u901f\u5b9a\u4f4d\u554f\u984c\u3002\u4f8b\u5982\uff1a<\/p>\n
ERROR:  new row for relation \"employees\" violates check constraint \"employees_age_check\"\nDETAIL:  Failing row contains (1, John Doe, -5).<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u932f\u8aa4\u6d88\u606f\u544a\u8a34\u6211\u5011\uff0c\u63d2\u5165\u7684\u884c\u9055\u53cd\u4e86\u201cemployees_age_check\u201d\u9019\u500b\u6aa2\u67e5\u7d04\u675f\uff0c\u56e0\u70ba\u5e74\u9f61\u70ba-5\u3002<\/p>\n
\u4fee\u5fa9\u932f\u8aa4\u4ee3\u78bc23514\u7684\u65b9\u6cd5<\/h2>\n
1. \u6aa2\u67e5\u6578\u64da<\/h3>\n
\u9996\u5148\uff0c\u60a8\u9700\u8981\u6aa2\u67e5\u5c0e\u81f4\u932f\u8aa4\u7684\u6578\u64da\u3002\u78ba\u4fdd\u6240\u6709\u63d2\u5165\u6216\u66f4\u65b0\u7684\u6578\u64da\u90fd\u7b26\u5408\u6aa2\u67e5\u7d04\u675f\u7684\u689d\u4ef6\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u6aa2\u67e5\u8868\u4e2d\u7684\u6578\u64da\uff1a<\/p>\n
SELECT * FROM employees WHERE age <= 0;<\/code><\/pre>\n
\u9019\u5c07\u8fd4\u56de\u6240\u6709\u5e74\u9f61\u5c0f\u65bc\u6216\u7b49\u65bc0\u7684\u8a18\u9304\uff0c\u5e6b\u52a9\u60a8\u8b58\u5225\u554f\u984c\u6578\u64da\u3002<\/p>\n
2. \u4fee\u6539\u6578\u64da<\/h3>\n
\u4e00\u65e6\u8b58\u5225\u51fa\u554f\u984c\u6578\u64da\uff0c\u60a8\u53ef\u4ee5\u9078\u64c7\u522a\u9664\u6216\u66f4\u65b0\u9019\u4e9b\u8a18\u9304\u3002\u4f8b\u5982\uff0c\u5982\u679c\u60a8\u767c\u73fe\u67d0\u500b\u54e1\u5de5\u7684\u5e74\u9f61\u70ba-5\uff0c\u60a8\u53ef\u4ee5\u5c07\u5176\u66f4\u65b0\u70ba\u6709\u6548\u7684\u5e74\u9f61\uff1a<\/p>\n
UPDATE employees SET age = 30 WHERE id = 1;<\/code><\/pre>\n
3. \u8abf\u6574\u6aa2\u67e5\u7d04\u675f<\/h3>\n
\u5982\u679c\u60a8\u767c\u73fe\u6aa2\u67e5\u7d04\u675f\u672c\u8eab\u4e0d\u518d\u9069\u7528\uff0c\u60a8\u53ef\u4ee5\u8003\u616e\u8abf\u6574\u6216\u522a\u9664\u5b83\u3002\u4f8b\u5982\uff0c\u5982\u679c\u60a8\u5e0c\u671b\u5141\u8a31\u5e74\u9f61\u70ba0\u7684\u60c5\u6cc1\uff0c\u53ef\u4ee5\u4fee\u6539\u6aa2\u67e5\u7d04\u675f\uff1a<\/p>\n
ALTER TABLE employees DROP CONSTRAINT employees_age_check;\nALTER TABLE employees ADD CONSTRAINT employees_age_check CHECK (age >= 0);<\/code><\/pre>\n
\u7e3d\u7d50<\/h2>\n
PostgreSQL\u932f\u8aa4\u4ee3\u78bc23514\u901a\u5e38\u662f\u7531\u65bc\u6578\u64da\u4e0d\u7b26\u5408\u6aa2\u67e5\u7d04\u675f\u800c\u5f15\u8d77\u7684\u3002\u901a\u904e\u6aa2\u67e5\u6578\u64da\u3001\u4fee\u6539\u4e0d\u5408\u898f\u7684\u8a18\u9304\u6216\u8abf\u6574\u6aa2\u67e5\u7d04\u675f\uff0c\u60a8\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u6b64\u932f\u8aa4\u3002\u4e86\u89e3\u5982\u4f55\u8655\u7406\u9019\u4e9b\u932f\u8aa4\u5c0d\u65bc\u7dad\u8b77\u6578\u64da\u5eab\u7684\u5b8c\u6574\u6027\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 \u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\u4ee5\u6eff\u8db3\u60a8\u7684\u9700\u6c42\uff0c\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u5176\u4ed6\u61c9\u7528\u7a0b\u5e8f\u7684\u904b\u884c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc23514 – check_violation\uff0c\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\u4e26\u89e3\u6c7a\u7d04\u675f\u6aa2\u67e5\u554f\u984c\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-178820","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178820","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=178820"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178820\/revisions"}],"predecessor-version":[{"id":178821,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178820\/revisions\/178821"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=178820"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=178820"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=178820"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}