{"id":179060,"date":"2024-11-08T22:40:19","date_gmt":"2024-11-08T14:40:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/179060\/"},"modified":"2024-11-08T22:40:20","modified_gmt":"2024-11-08T14:40:20","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9-postgresql-%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc%ef%bc%9a42p21-collation_mismatch%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/179060\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P21 &#8211; collation_mismatch\uff1f"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9-postgresql-%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc%ef%bc%9a42p21-collation_mismatch-oFdVKEvimc\">\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P21 &#8211; collation_mismatch<\/h1>\n<p>\u5728\u4f7f\u7528 PostgreSQL \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\u78bc 42P21\uff0c\u9019\u901a\u5e38\u8207\u300ccollation mismatch\u300d\u6709\u95dc\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u767c\u751f\u5728\u9032\u884c\u5b57\u7b26\u4e32\u6bd4\u8f03\u6216\u6392\u5e8f\u6642\uff0c\u7576\u6d89\u53ca\u7684\u5b57\u7b26\u4e32\u4f7f\u7528\u4e86\u4e0d\u540c\u7684\u6392\u5e8f\u898f\u5247\uff08collation\uff09\u6642\uff0c\u5c31\u6703\u51fa\u73fe\u9019\u500b\u554f\u984c\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-collation%ef%bc%9f-oFdVKEvimc\">\u4ec0\u9ebc\u662f Collation\uff1f<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\uff0ccollation \u662f\u7528\u4f86\u5b9a\u7fa9\u5b57\u7b26\u4e32\u7684\u6392\u5e8f\u548c\u6bd4\u8f03\u898f\u5247\u7684\u3002\u5b83\u6c7a\u5b9a\u4e86\u5982\u4f55\u5c0d\u5b57\u7b26\u4e32\u9032\u884c\u6392\u5e8f\u3001\u6bd4\u8f03\u4ee5\u53ca\u5982\u4f55\u8655\u7406\u5927\u5c0f\u5beb\u548c\u91cd\u97f3\u7b26\u865f\u7b49\u3002PostgreSQL \u652f\u6301\u591a\u7a2e collation\uff0c\u4e26\u4e14\u53ef\u4ee5\u5728\u6578\u64da\u5eab\u3001\u8868\u683c\u6216\u5217\u7684\u5c64\u7d1a\u4e0a\u9032\u884c\u8a2d\u7f6e\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc-42p21-%e7%9a%84%e5%8e%9f%e5%9b%a0-oFdVKEvimc\">\u932f\u8aa4\u4ee3\u78bc 42P21 \u7684\u539f\u56e0<\/h2>\n<p>\u7576\u4f60\u5728 PostgreSQL \u4e2d\u57f7\u884c\u67e5\u8a62\u6642\uff0c\u5982\u679c\u6d89\u53ca\u5230\u7684\u5217\u6216\u8868\u4f7f\u7528\u4e86\u4e0d\u540c\u7684 collation\uff0c\u5c31\u6703\u5c0e\u81f4\u932f\u8aa4 42P21\u3002\u9019\u901a\u5e38\u767c\u751f\u5728\u4ee5\u4e0b\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li>\u5728\u67e5\u8a62\u4e2d\u6bd4\u8f03\u4e86\u4f86\u81ea\u4e0d\u540c\u8868\u7684\u5b57\u7b26\u4e32\u5217\uff0c\u9019\u4e9b\u5217\u4f7f\u7528\u4e86\u4e0d\u540c\u7684 collation\u3002<\/li>\n<li>\u5728 JOIN \u64cd\u4f5c\u4e2d\uff0c\u6d89\u53ca\u7684\u5217\u4f7f\u7528\u4e86\u4e0d\u540c\u7684 collation\u3002<\/li>\n<li>\u5728 ORDER BY \u5b50\u53e5\u4e2d\uff0c\u4f7f\u7528\u4e86\u4e0d\u540c\u7684 collation\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9-collation_mismatch-%e9%8c%af%e8%aa%a4-oFdVKEvimc\">\u5982\u4f55\u4fee\u5fa9 collation_mismatch \u932f\u8aa4<\/h2>\n<p>\u4fee\u5fa9\u9019\u500b\u932f\u8aa4\u7684\u95dc\u9375\u5728\u65bc\u78ba\u4fdd\u6240\u6709\u6d89\u53ca\u7684\u5b57\u7b26\u4e32\u5217\u4f7f\u7528\u76f8\u540c\u7684 collation\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u89e3\u6c7a\u65b9\u6848\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e4%b8%a6%e7%b5%b1%e4%b8%80-collation-oFdVKEvimc\">1. \u6aa2\u67e5\u4e26\u7d71\u4e00 collation<\/h3>\n<p>\u9996\u5148\uff0c\u4f60\u9700\u8981\u6aa2\u67e5\u6d89\u53ca\u7684\u5217\u7684 collation \u8a2d\u7f6e\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u67e5\u8a62\u4f86\u67e5\u770b\u8868\u4e2d\u5217\u7684 collation\uff1a<\/p>\n<pre><code>SELECT column_name, collation_name \nFROM information_schema.columns \nWHERE table_name = 'your_table_name';<\/code><\/pre>\n<p>\u6839\u64da\u67e5\u8a62\u7d50\u679c\uff0c\u4f60\u53ef\u4ee5\u6c7a\u5b9a\u662f\u5426\u9700\u8981\u66f4\u6539\u67d0\u4e9b\u5217\u7684 collation\u3002\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\u4f86\u4fee\u6539\u5217\u7684 collation\uff1a<\/p>\n<pre><code>ALTER TABLE your_table_name \nALTER COLUMN your_column_name \nSET COLLATION 'desired_collation';<\/code><\/pre>\n<h3 id=\"2-%e5%9c%a8%e6%9f%a5%e8%a9%a2%e4%b8%ad%e6%98%8e%e7%a2%ba%e6%8c%87%e5%ae%9a-collation-oFdVKEvimc\">2. \u5728\u67e5\u8a62\u4e2d\u660e\u78ba\u6307\u5b9a collation<\/h3>\n<p>\u5982\u679c\u4e0d\u60f3\u66f4\u6539\u8868\u7d50\u69cb\uff0c\u53ef\u4ee5\u5728\u67e5\u8a62\u4e2d\u660e\u78ba\u6307\u5b9a collation\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT * FROM table1 \nJOIN table2 \nON table1.column_name COLLATE \"desired_collation\" = table2.column_name;<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u5728\u67e5\u8a62\u57f7\u884c\u6642\u5f37\u5236\u4f7f\u7528\u76f8\u540c\u7684 collation\u3002<\/p>\n<h3 id=\"3-%e5%89%b5%e5%bb%ba%e6%96%b0%e7%9a%84%e8%a1%a8%e6%88%96%e5%88%97-oFdVKEvimc\">3. \u5275\u5efa\u65b0\u7684\u8868\u6216\u5217<\/h3>\n<p>\u5982\u679c\u4ee5\u4e0a\u65b9\u6cd5\u4e0d\u9069\u7528\uff0c\u8003\u616e\u5275\u5efa\u4e00\u500b\u65b0\u7684\u8868\u6216\u5217\uff0c\u4e26\u5728\u5275\u5efa\u6642\u6307\u5b9a\u6b63\u78ba\u7684 collation\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u672a\u4f86\u7684 collation mismatch \u554f\u984c\u3002<\/p>\n<pre><code>CREATE TABLE new_table (\n    new_column VARCHAR(255) COLLATE \"desired_collation\"\n);<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-oFdVKEvimc\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL \u932f\u8aa4\u4ee3\u78bc 42P21 &#8211; collation_mismatch \u662f\u4e00\u500b\u5e38\u898b\u7684\u554f\u984c\uff0c\u901a\u5e38\u7531\u65bc\u4e0d\u540c\u7684 collation \u8a2d\u7f6e\u5f15\u8d77\u3002\u901a\u904e\u6aa2\u67e5\u4e26\u7d71\u4e00 collation\u3001\u5728\u67e5\u8a62\u4e2d\u660e\u78ba\u6307\u5b9a collation \u6216\u5275\u5efa\u65b0\u7684\u8868\u6216\u5217\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u9019\u500b\u554f\u984c\u3002\u4e86\u89e3 collation \u7684\u91cd\u8981\u6027\u4ee5\u53ca\u5982\u4f55\u6b63\u78ba\u4f7f\u7528\u5b83\uff0c\u5c0d\u65bc\u7dad\u8b77\u6578\u64da\u5eab\u7684\u7a69\u5b9a\u6027\u548c\u6027\u80fd\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u5e6b\u52a9\u60a8\u8f15\u9b06\u7ba1\u7406\u6578\u64da\u5eab\u548c\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc 42P21 &#8211; collation_mismatch\uff0c\u89e3\u6c7a\u8cc7\u6599\u5eab\u4e2d\u7684\u6392\u5e8f\u898f\u5247\u4e0d\u5339\u914d\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-179060","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179060","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=179060"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179060\/revisions"}],"predecessor-version":[{"id":179061,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179060\/revisions\/179061"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=179060"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=179060"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=179060"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}