{"id":96838,"date":"2024-10-20T12:47:16","date_gmt":"2024-10-20T04:47:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96838\/"},"modified":"2024-10-20T12:47:17","modified_gmt":"2024-10-20T04:47:17","slug":"postgresql-42p04-%e9%87%8d%e8%a4%87%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab-%e6%8a%a5%e9%94%99-%e6%95%85%e9%9a%9c%e4%bf%ae%e5%a4%8d-%e8%bf%9c%e7%a8%8b%e5%a4%84%e7%90%86","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/96838\/","title":{"rendered":"PostgreSQL 42P04: \u91cd\u8907\u7684\u6578\u64da\u5eab \u62a5\u9519 \u6545\u969c\u4fee\u590d \u8fdc\u7a0b\u5904\u7406"},"content":{"rendered":"<h1 id=\"postgresql-42p04-%e9%87%8d%e8%a4%87%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e5%a0%b1%e9%8c%af%e6%95%85%e9%9a%9c%e4%bf%ae%e5%be%a9%e9%81%a0%e7%a8%8b%e8%99%95%e7%90%86-zdpVqBjHNW\">PostgreSQL 42P04: \u91cd\u8907\u7684\u6578\u64da\u5eab\u5831\u932f\u6545\u969c\u4fee\u5fa9\u9060\u7a0b\u8655\u7406<\/h1>\n<p>\u5728\u4f7f\u7528 PostgreSQL \u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u548c\u7cfb\u7d71\u7ba1\u7406\u54e1\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f 42P04 \u932f\u8aa4\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u8868\u793a\u5617\u8a66\u5275\u5efa\u4e00\u500b\u5df2\u7d93\u5b58\u5728\u7684\u6578\u64da\u5eab\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\u3001\u89e3\u6c7a\u65b9\u6848\u4ee5\u53ca\u5982\u4f55\u9032\u884c\u9060\u7a0b\u8655\u7406\u3002<\/p>\n<h2 id=\"42p04-%e9%8c%af%e8%aa%a4%e7%9a%84%e5%8e%9f%e5%9b%a0-zdpVqBjHNW\">42P04 \u932f\u8aa4\u7684\u539f\u56e0<\/h2>\n<p>PostgreSQL \u7684 42P04 \u932f\u8aa4\u4ee3\u78bc\u8868\u793a\u300c\u91cd\u8907\u7684\u6578\u64da\u5eab\u300d\u3002\u7576\u7528\u6236\u5617\u8a66\u5275\u5efa\u4e00\u500b\u5df2\u5b58\u5728\u7684\u6578\u64da\u5eab\u6642\uff0c\u7cfb\u7d71\u6703\u8fd4\u56de\u6b64\u932f\u8aa4\u3002\u9019\u901a\u5e38\u767c\u751f\u5728\u4ee5\u4e0b\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li>\u7528\u6236\u5728\u57f7\u884c <code>CREATE DATABASE<\/code> \u547d\u4ee4\u6642\uff0c\u6307\u5b9a\u7684\u6578\u64da\u5eab\u540d\u7a31\u5df2\u7d93\u5b58\u5728\u3002<\/li>\n<li>\u5728\u81ea\u52d5\u5316\u8173\u672c\u4e2d\uff0c\u672a\u6aa2\u67e5\u6578\u64da\u5eab\u662f\u5426\u5df2\u5b58\u5728\u5c31\u76f4\u63a5\u57f7\u884c\u5275\u5efa\u547d\u4ee4\u3002<\/li>\n<li>\u591a\u500b\u7528\u6236\u540c\u6642\u5617\u8a66\u5275\u5efa\u540c\u4e00\u6578\u64da\u5eab\uff0c\u5c0e\u81f4\u7af6\u722d\u689d\u4ef6\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9-42p04-%e9%8c%af%e8%aa%a4-zdpVqBjHNW\">\u5982\u4f55\u4fee\u5fa9 42P04 \u932f\u8aa4<\/h2>\n<p>\u4fee\u5fa9 42P04 \u932f\u8aa4\u7684\u7b2c\u4e00\u6b65\u662f\u78ba\u8a8d\u6578\u64da\u5eab\u662f\u5426\u5df2\u5b58\u5728\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u67e5\u8a62\u4f86\u6aa2\u67e5\uff1a<\/p>\n<pre><code>SELECT datname FROM pg_database WHERE datname = 'your_database_name';<\/code><\/pre>\n<p>\u5982\u679c\u67e5\u8a62\u7d50\u679c\u986f\u793a\u6578\u64da\u5eab\u5df2\u5b58\u5728\uff0c\u5247\u53ef\u4ee5\u9078\u64c7\u4ee5\u4e0b\u5e7e\u7a2e\u89e3\u6c7a\u65b9\u6848\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u4e0d\u540c\u7684\u6578\u64da\u5eab\u540d\u7a31\uff1a<\/strong>\u5982\u679c\u4e0d\u9700\u8981\u7279\u5b9a\u7684\u6578\u64da\u5eab\u540d\u7a31\uff0c\u53ef\u4ee5\u9078\u64c7\u4e00\u500b\u65b0\u7684\u540d\u7a31\u4f86\u5275\u5efa\u6578\u64da\u5eab\u3002<\/li>\n<li><strong>\u522a\u9664\u5df2\u5b58\u5728\u7684\u6578\u64da\u5eab\uff1a<\/strong>\u5982\u679c\u78ba\u5b9a\u4e0d\u518d\u9700\u8981\u8a72\u6578\u64da\u5eab\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u522a\u9664\uff1a<\/strong><\/li>\n<pre><code>DROP DATABASE your_database_name;<\/code><\/pre>\n<li><strong>\u6aa2\u67e5\u81ea\u52d5\u5316\u8173\u672c\uff1a<\/strong>\u5982\u679c\u662f\u81ea\u52d5\u5316\u8173\u672c\u5c0e\u81f4\u7684\u932f\u8aa4\uff0c\u61c9\u5728\u5275\u5efa\u6578\u64da\u5eab\u4e4b\u524d\u6dfb\u52a0\u6aa2\u67e5\u908f\u8f2f\uff0c\u4ee5\u907f\u514d\u91cd\u8907\u5275\u5efa\u3002<\/li>\n<\/ul>\n<h2 id=\"%e9%81%a0%e7%a8%8b%e8%99%95%e7%90%86-42p04-%e9%8c%af%e8%aa%a4-zdpVqBjHNW\">\u9060\u7a0b\u8655\u7406 42P04 \u932f\u8aa4<\/h2>\n<p>\u5728\u9060\u7a0b\u74b0\u5883\u4e2d\u8655\u7406 PostgreSQL \u7684 42P04 \u932f\u8aa4\u6642\uff0c\u9996\u5148\u9700\u8981\u78ba\u4fdd\u53ef\u4ee5\u5b89\u5168\u5730\u9023\u63a5\u5230\u6578\u64da\u5eab\u3002\u4f7f\u7528 SSH \u6216\u5176\u4ed6\u5b89\u5168\u901a\u9053\u9023\u63a5\u5230\u6578\u64da\u5eab\u4f3a\u670d\u5668\u5f8c\uff0c\u53ef\u4ee5\u57f7\u884c\u4e0a\u8ff0\u6aa2\u67e5\u548c\u4fee\u5fa9\u6b65\u9a5f\u3002<\/p>\n<p>\u5982\u679c\u60a8\u4f7f\u7528\u7684\u662f\u96f2\u4f3a\u670d\u5668\u6216 VPS\uff0c\u78ba\u4fdd\u60a8\u7684\u9632\u706b\u7246\u8a2d\u7f6e\u5141\u8a31 PostgreSQL \u7684\u7aef\u53e3\uff08\u9ed8\u8a8d\u70ba 5432\uff09\u9032\u884c\u9060\u7a0b\u9023\u63a5\u3002\u9023\u63a5\u5f8c\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 psql \u547d\u4ee4\u884c\u5de5\u5177\u6216\u5176\u4ed6\u6578\u64da\u5eab\u7ba1\u7406\u5de5\u5177\u4f86\u57f7\u884c SQL \u67e5\u8a62\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e6%ad%a3%e7%a2%ba%e6%96%b9%e5%bc%8f-zdpVqBjHNW\">\u793a\u4f8b\uff1a\u5275\u5efa\u6578\u64da\u5eab\u7684\u6b63\u78ba\u65b9\u5f0f<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u5275\u5efa\u6578\u64da\u5eab\u7684\u793a\u4f8b\uff0c\u5305\u542b\u6aa2\u67e5\u6578\u64da\u5eab\u662f\u5426\u5b58\u5728\u7684\u908f\u8f2f\uff1a<\/p>\n<pre><code>DO $$\nBEGIN\n    IF NOT EXISTS (SELECT 1 FROM pg_database WHERE datname = 'your_database_name') THEN\n        CREATE DATABASE your_database_name;\n    ELSE\n        RAISE NOTICE 'Database already exists.';\n    END IF;\nEND $$;<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u5c07\u5728\u6578\u64da\u5eab\u4e0d\u5b58\u5728\u7684\u60c5\u6cc1\u4e0b\u5275\u5efa\u6578\u64da\u5eab\uff0c\u4e26\u5728\u6578\u64da\u5eab\u5df2\u5b58\u5728\u6642\u767c\u51fa\u901a\u77e5\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-zdpVqBjHNW\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL \u7684 42P04 \u932f\u8aa4\u901a\u5e38\u662f\u7531\u65bc\u5617\u8a66\u5275\u5efa\u5df2\u5b58\u5728\u7684\u6578\u64da\u5eab\u5f15\u8d77\u7684\u3002\u901a\u904e\u6aa2\u67e5\u6578\u64da\u5eab\u662f\u5426\u5b58\u5728\u3001\u4f7f\u7528\u4e0d\u540c\u7684\u540d\u7a31\u6216\u522a\u9664\u4e0d\u9700\u8981\u7684\u6578\u64da\u5eab\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u6b64\u554f\u984c\u3002\u5728\u9060\u7a0b\u8655\u7406\u6642\uff0c\u78ba\u4fdd\u5b89\u5168\u9023\u63a5\u4e26\u4f7f\u7528\u9069\u7576\u7684\u5de5\u5177\u9032\u884c\u64cd\u4f5c\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u6578\u64da\u5eab\u7ba1\u7406\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u5c07\u662f\u660e\u667a\u7684\u9078\u64c7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u6c7aPostgreSQL 42P04\u91cd\u8907\u6578\u64da\u5eab\u932f\u8aa4\u7684\u6545\u969c\u4fee\u5fa9\u6307\u5357\uff0c\u63d0\u4f9b\u9060\u7a0b\u8655\u7406\u6280\u5de7\uff0c\u52a9\u60a8\u5feb\u901f\u6062\u5fa9\u6578\u64da\u5eab\u6b63\u5e38\u904b\u884c\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-96838","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96838","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=96838"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96838\/revisions"}],"predecessor-version":[{"id":96839,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96838\/revisions\/96839"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96838"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96838"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96838"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}