{"id":96852,"date":"2024-10-20T12:54:21","date_gmt":"2024-10-20T04:54:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96852\/"},"modified":"2024-10-20T12:54:22","modified_gmt":"2024-10-20T04:54:22","slug":"postgresql-42p18-%e4%b8%8d%e7%a2%ba%e5%ae%9a%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-%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\/96852\/","title":{"rendered":"PostgreSQL 42P18: \u4e0d\u78ba\u5b9a\u7684\u6578\u64da\u985e\u578b \u62a5\u9519 \u6545\u969c\u4fee\u590d \u8fdc\u7a0b\u5904\u7406"},"content":{"rendered":"<h1 id=\"postgresql-42p18-%e4%b8%8d%e7%a2%ba%e5%ae%9a%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%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-WHbfNSTjct\">PostgreSQL 42P18: \u4e0d\u78ba\u5b9a\u7684\u6578\u64da\u985e\u578b\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\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\uff0c\u5176\u4e2d\u4e4b\u4e00\u4fbf\u662f 42P18 \u932f\u8aa4\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u8207\u4e0d\u78ba\u5b9a\u7684\u6578\u64da\u985e\u578b\u6709\u95dc\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u67e5\u8a62\u5931\u6557\u6216\u6578\u64da\u8655\u7406\u4e0d\u7576\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e 42P18 \u932f\u8aa4\u7684\u6210\u56e0\u3001\u89e3\u6c7a\u65b9\u6848\u4ee5\u53ca\u5982\u4f55\u9032\u884c\u9060\u7a0b\u8655\u7406\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-42p18-%e9%8c%af%e8%aa%a4%ef%bc%9f-WHbfNSTjct\">\u4ec0\u9ebc\u662f 42P18 \u932f\u8aa4\uff1f<\/h2>\n<p>42P18 \u932f\u8aa4\u662f PostgreSQL \u4e2d\u7684\u4e00\u500b SQL \u932f\u8aa4\u4ee3\u78bc\uff0c\u8868\u793a\u300c\u4e0d\u78ba\u5b9a\u7684\u6578\u64da\u985e\u578b\u300d\u3002\u9019\u901a\u5e38\u767c\u751f\u5728\u4f7f\u7528\u4e0d\u660e\u78ba\u7684\u6578\u64da\u985e\u578b\u6642\uff0c\u4f8b\u5982\u5728\u51fd\u6578\u6216\u67e5\u8a62\u4e2d\u672a\u6b63\u78ba\u6307\u5b9a\u6578\u64da\u985e\u578b\uff0c\u5c0e\u81f4 PostgreSQL \u7121\u6cd5\u78ba\u5b9a\u61c9\u4f7f\u7528\u54ea\u4e00\u7a2e\u6578\u64da\u985e\u578b\u3002<\/p>\n<h2 id=\"%e5%b8%b8%e8%a6%8b%e7%9a%84%e6%88%90%e5%9b%a0-WHbfNSTjct\">\u5e38\u898b\u7684\u6210\u56e0<\/h2>\n<ul>\n<li><strong>\u51fd\u6578\u5b9a\u7fa9\u4e0d\u660e\u78ba\uff1a<\/strong>\u7576\u5275\u5efa\u51fd\u6578\u6642\uff0c\u5982\u679c\u672a\u660e\u78ba\u6307\u5b9a\u53c3\u6578\u7684\u6578\u64da\u985e\u578b\uff0c\u5247\u53ef\u80fd\u6703\u5c0e\u81f4\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u4f7f\u7528\u4e0d\u652f\u6301\u7684\u6578\u64da\u985e\u578b\uff1a<\/strong>\u67d0\u4e9b\u6578\u64da\u985e\u578b\u5728\u7279\u5b9a\u4e0a\u4e0b\u6587\u4e2d\u53ef\u80fd\u4e0d\u88ab\u652f\u6301\uff0c\u9019\u4e5f\u6703\u5f15\u767c 42P18 \u932f\u8aa4\u3002<\/li>\n<li><strong>\u67e5\u8a62\u4e2d\u7684\u985e\u578b\u4e0d\u5339\u914d\uff1a<\/strong>\u5728\u67e5\u8a62\u4e2d\uff0c\u5982\u679c\u4f7f\u7528\u4e86\u4e0d\u540c\u7684\u6578\u64da\u985e\u578b\u800c\u672a\u9032\u884c\u9069\u7576\u7684\u8f49\u63db\uff0c\u5247\u53ef\u80fd\u6703\u5c0e\u81f4\u6b64\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9-42p18-%e9%8c%af%e8%aa%a4-WHbfNSTjct\">\u5982\u4f55\u4fee\u5fa9 42P18 \u932f\u8aa4<\/h2>\n<p>\u4fee\u5fa9 42P18 \u932f\u8aa4\u7684\u7b2c\u4e00\u6b65\u662f\u78ba\u5b9a\u932f\u8aa4\u7684\u5177\u9ad4\u4f4d\u7f6e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u4fee\u5fa9\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e5%87%bd%e6%95%b8%e5%ae%9a%e7%be%a9-WHbfNSTjct\">1. \u6aa2\u67e5\u51fd\u6578\u5b9a\u7fa9<\/h3>\n<pre><code>CREATE OR REPLACE FUNCTION example_function(param1 TEXT, param2 INT)\nRETURNS VOID AS $$\nBEGIN\n    -- \u51fd\u6578\u908f\u8f2f\nEND;\n$$ LANGUAGE plpgsql;<\/code><\/pre>\n<p>\u78ba\u4fdd\u5728\u51fd\u6578\u5b9a\u7fa9\u4e2d\u660e\u78ba\u6307\u5b9a\u6bcf\u500b\u53c3\u6578\u7684\u6578\u64da\u985e\u578b\u3002\u5982\u679c\u53c3\u6578\u985e\u578b\u4e0d\u660e\u78ba\uff0c\u5247 PostgreSQL \u53ef\u80fd\u7121\u6cd5\u6b63\u78ba\u89e3\u6790\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e9%a1%af%e5%bc%8f%e9%a1%9e%e5%9e%8b%e8%bd%89%e6%8f%9b-WHbfNSTjct\">2. \u4f7f\u7528\u986f\u5f0f\u985e\u578b\u8f49\u63db<\/h3>\n<p>\u5728\u67e5\u8a62\u4e2d\uff0c\u4f7f\u7528\u986f\u5f0f\u985e\u578b\u8f49\u63db\u53ef\u4ee5\u5e6b\u52a9 PostgreSQL \u78ba\u5b9a\u6b63\u78ba\u7684\u6578\u64da\u985e\u578b\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT * FROM example_table WHERE example_column = '123'::INT;<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u56e0\u985e\u578b\u4e0d\u5339\u914d\u800c\u5f15\u767c\u7684\u932f\u8aa4\u3002<\/p>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e6%94%af%e6%8c%81-WHbfNSTjct\">3. \u6aa2\u67e5\u6578\u64da\u985e\u578b\u652f\u6301<\/h3>\n<p>\u78ba\u4fdd\u4f7f\u7528\u7684\u6578\u64da\u985e\u578b\u5728 PostgreSQL \u4e2d\u662f\u88ab\u652f\u6301\u7684\u3002\u67d0\u4e9b\u81ea\u5b9a\u7fa9\u6578\u64da\u985e\u578b\u6216\u64f4\u5c55\u53ef\u80fd\u5728\u7279\u5b9a\u7248\u672c\u4e2d\u4e0d\u88ab\u652f\u6301\uff0c\u9019\u9700\u8981\u9032\u884c\u76f8\u61c9\u7684\u8abf\u6574\u3002<\/p>\n<h2 id=\"%e9%81%a0%e7%a8%8b%e8%99%95%e7%90%86-42p18-%e9%8c%af%e8%aa%a4-WHbfNSTjct\">\u9060\u7a0b\u8655\u7406 42P18 \u932f\u8aa4<\/h2>\n<p>\u5728\u9060\u7a0b\u74b0\u5883\u4e2d\u8655\u7406 42P18 \u932f\u8aa4\u6642\uff0c\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u9060\u7a0b\u9023\u63a5\u5de5\u5177\uff1a<\/strong>\u4f7f\u7528\u5982 pgAdmin \u6216 DBeaver \u7b49\u5de5\u5177\uff0c\u9023\u63a5\u5230\u9060\u7a0b PostgreSQL \u6578\u64da\u5eab\uff0c\u4e26\u6aa2\u67e5\u932f\u8aa4\u65e5\u8a8c\u3002<\/li>\n<li><strong>\u57f7\u884c SQL \u8a9e\u53e5\uff1a<\/strong>\u5728\u9060\u7a0b\u74b0\u5883\u4e2d\u57f7\u884c SQL \u8a9e\u53e5\uff0c\u4e26\u89c0\u5bdf\u662f\u5426\u80fd\u91cd\u73fe\u932f\u8aa4\uff0c\u4ee5\u4fbf\u9032\u884c\u8abf\u8a66\u3002<\/li>\n<li><strong>\u66f4\u65b0\u6578\u64da\u5eab\u7248\u672c\uff1a<\/strong>\u78ba\u4fdd PostgreSQL \u6578\u64da\u5eab\u7248\u672c\u662f\u6700\u65b0\u7684\uff0c\u56e0\u70ba\u67d0\u4e9b\u932f\u8aa4\u53ef\u80fd\u5728\u65b0\u7248\u672c\u4e2d\u5df2\u88ab\u4fee\u5fa9\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-WHbfNSTjct\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL \u7684 42P18 \u932f\u8aa4\u901a\u5e38\u8207\u4e0d\u78ba\u5b9a\u7684\u6578\u64da\u985e\u578b\u6709\u95dc\uff0c\u901a\u904e\u6aa2\u67e5\u51fd\u6578\u5b9a\u7fa9\u3001\u4f7f\u7528\u986f\u5f0f\u985e\u578b\u8f49\u63db\u4ee5\u53ca\u78ba\u4fdd\u6578\u64da\u985e\u578b\u652f\u6301\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u6b64\u932f\u8aa4\u3002\u5728\u9060\u7a0b\u8655\u7406\u6642\uff0c\u4f7f\u7528\u5408\u9069\u7684\u5de5\u5177\u548c\u65b9\u6cd5\u5c07\u6709\u52a9\u65bc\u5feb\u901f\u5b9a\u4f4d\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u6216 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u61c9\u7528\u63d0\u4f9b\u66f4\u597d\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u6c7aPostgreSQL 42P18\u932f\u8aa4\uff0c\u8655\u7406\u4e0d\u78ba\u5b9a\u6578\u64da\u985e\u578b\u554f\u984c\uff0c\u63d0\u4f9b\u6545\u969c\u4fee\u5fa9\u548c\u9060\u7a0b\u8655\u7406\u65b9\u6848\uff0c\u63d0\u5347\u6578\u64da\u5eab\u7a69\u5b9a\u6027\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-96852","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96852","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=96852"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96852\/revisions"}],"predecessor-version":[{"id":96853,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96852\/revisions\/96853"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96852"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96852"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96852"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}