{"id":21401,"date":"2024-01-02T08:46:25","date_gmt":"2024-01-02T08:46:25","guid":{"rendered":"https:\/\/server.hk\/blog\/21401\/"},"modified":"2024-11-14T10:35:07","modified_gmt":"2024-11-14T02:35:07","slug":"how-to-fix-postgresql-error-code-42p19-invalid_recursion","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/21401\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P19 &#8211; invalid_recursion"},"content":{"rendered":"<h1 id=\"how-to-fix-postgresql-error-code-42p19-invalid_recursion-PnIjBljtiI\">\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P19 &#8211; invalid_recursion<\/h1>\n<p>PostgreSQL \u662f\u4e00\u500b\u5f37\u5927\u7684\u958b\u6e90\u95dc\u806f\u5f0f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u3002\u7136\u800c\uff0c\u50cf\u4efb\u4f55\u8edf\u4ef6\u4e00\u6a23\uff0cPostgreSQL \u4e5f\u53ef\u80fd\u6703\u9047\u5230\u6703\u5e72\u64fe\u5176\u6b63\u5e38\u904b\u884c\u7684\u932f\u8aa4\u3002\u5176\u4e2d\u4e00\u500b\u932f\u8aa4\u662f PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P19 &#8211; invalid_recursion\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u6b64\u932f\u8aa4\u7684\u539f\u56e0\uff0c\u4e26\u63d0\u4f9b\u9010\u6b65\u7684\u4fee\u5fa9\u6307\u5c0e\u3002<\/p>\n<h2 id=\"understanding-the-error-PnIjBljtiI\">\u7406\u89e3\u932f\u8aa4<\/h2>\n<p>PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P19 &#8211; invalid_recursion \u767c\u751f\u5728\u57f7\u884c\u905e\u6b78\u67e5\u8a62\u6642\uff0c\u672a\u9032\u884c\u9069\u7576\u7684\u8a2d\u7f6e\u6216\u914d\u7f6e\u3002\u905e\u6b78\u67e5\u8a62\u662f\u6307\u5728\u5176\u81ea\u8eab\u5b9a\u7fa9\u4e2d\u5f15\u7528\u81ea\u5df1\u7684\u67e5\u8a62\uff0c\u5141\u8a31\u8907\u96dc\u7684\u6578\u64da\u6aa2\u7d22\u548c\u64cd\u4f5c\u3002\u7136\u800c\uff0c\u5982\u679c\u672a\u6b63\u78ba\u5be6\u73fe\uff0c\u5b83\u5011\u53ef\u80fd\u6703\u5c0e\u81f4\u6211\u5011\u8a0e\u8ad6\u7684\u932f\u8aa4\u3002<\/p>\n<h2 id=\"possible-causes-PnIjBljtiI\">\u53ef\u80fd\u7684\u539f\u56e0<\/h2>\n<p>\u9020\u6210 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P19 &#8211; invalid_recursion \u7684\u6f5b\u5728\u539f\u56e0\u6709\u5e7e\u500b\uff1a<\/p>\n<ul>\n<li><strong>\u7f3a\u5c11\u905e\u6b78\u95dc\u9375\u5b57\uff1a<\/strong>\u4e00\u500b\u5e38\u898b\u539f\u56e0\u662f\u5fd8\u8a18\u5728\u67e5\u8a62\u4e2d\u5305\u542b &#8220;RECURSIVE&#8221; \u95dc\u9375\u5b57\u3002\u9019\u500b\u95dc\u9375\u5b57\u5c0d\u65bc\u6307\u793a\u67e5\u8a62\u70ba\u905e\u6b78\u67e5\u8a62\u662f\u5fc5\u9700\u7684\u3002<\/li>\n<li><strong>\u905e\u6b78\u67e5\u8a62\u7d50\u69cb\u4e0d\u6b63\u78ba\uff1a<\/strong>\u53e6\u4e00\u500b\u539f\u56e0\u662f\u905e\u6b78\u67e5\u8a62\u7684\u7d50\u69cb\u4e0d\u6b63\u78ba\u3002\u78ba\u4fdd\u67e5\u8a62\u7684\u5b9a\u7fa9\u6b63\u78ba\uff0c\u5177\u6709\u9069\u7576\u7684\u57fa\u790e\u60c5\u6cc1\u548c\u905e\u6b78\u6b65\u9a5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/li>\n<li><strong>\u7121\u6548\u7684\u905e\u6b78\u5f15\u7528\uff1a<\/strong>\u5982\u679c\u905e\u6b78\u67e5\u8a62\u4e2d\u5b58\u5728\u7121\u6548\u5f15\u7528\uff0c\u4e5f\u6703\u5c0e\u81f4\u932f\u8aa4\u3002\u52d9\u5fc5\u4ed4\u7d30\u6aa2\u67e5\u6240\u6709\u5f15\u7528\u662f\u5426\u6709\u6548\u4e26\u6b63\u78ba\u5b9a\u7fa9\u3002<\/li>\n<\/ul>\n<h2 id=\"fixing-the-error-PnIjBljtiI\">\u4fee\u5fa9\u932f\u8aa4<\/h2>\n<p>\u8981\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P19 &#8211; invalid_recursion\uff0c\u8acb\u6309\u7167\u4ee5\u4e0b\u6b65\u9a5f\u9032\u884c\uff1a<\/p>\n<h3 id=\"step-1-review-the-recursive-query-PnIjBljtiI\">\u6b65\u9a5f 1\uff1a\u6aa2\u67e5\u905e\u6b78\u67e5\u8a62<\/h3>\n<p>\u9996\u5148\u6aa2\u67e5\u89f8\u767c\u932f\u8aa4\u7684\u905e\u6b78\u67e5\u8a62\u3002\u6aa2\u67e5\u662f\u5426\u6709\u7f3a\u5c11\u7684\u95dc\u9375\u5b57\u3001\u4e0d\u6b63\u78ba\u7684\u7d50\u69cb\u6216\u7121\u6548\u7684\u5f15\u7528\u3002\u78ba\u4fdd\u67e5\u8a62\u9075\u5faa PostgreSQL \u4e2d\u905e\u6b78\u67e5\u8a62\u7684\u6b63\u78ba\u8a9e\u6cd5\u3002<\/p>\n<h3 id=\"step-2-add-the-recursive-keyword-PnIjBljtiI\">\u6b65\u9a5f 2\uff1a\u6dfb\u52a0\u905e\u6b78\u95dc\u9375\u5b57<\/h3>\n<p>\u5982\u679c\u67e5\u8a62\u7f3a\u5c11 &#8220;RECURSIVE&#8221; \u95dc\u9375\u5b57\uff0c\u8acb\u5c07\u5176\u6dfb\u52a0\u5230\u67e5\u8a62\u7684\u958b\u982d\u3002\u6b64\u95dc\u9375\u5b57\u5c0d\u65bc\u6307\u793a\u67e5\u8a62\u70ba\u905e\u6b78\u67e5\u8a62\u662f\u5fc5\u8981\u7684\u3002<\/p>\n<h3 id=\"step-3-verify-recursive-query-structure-PnIjBljtiI\">\u6b65\u9a5f 3\uff1a\u9a57\u8b49\u905e\u6b78\u67e5\u8a62\u7d50\u69cb<\/h3>\n<p>\u4ed4\u7d30\u6aa2\u67e5\u905e\u6b78\u67e5\u8a62\u7684\u7d50\u69cb\u3002\u78ba\u4fdd\u5177\u6709\u9069\u7576\u7684\u57fa\u790e\u60c5\u6cc1\u548c\u905e\u6b78\u6b65\u9a5f\u3002\u57fa\u790e\u60c5\u6cc1\u5b9a\u7fa9\u905e\u6b78\u7684\u7d42\u6b62\u689d\u4ef6\uff0c\u800c\u905e\u6b78\u6b65\u9a5f\u5247\u5b9a\u7fa9\u67e5\u8a62\u5982\u4f55\u5f15\u7528\u81ea\u8eab\u3002<\/p>\n<h3 id=\"step-4-validate-recursive-references-PnIjBljtiI\">\u6b65\u9a5f 4\uff1a\u9a57\u8b49\u905e\u6b78\u5f15\u7528<\/h3>\n<p>\u6aa2\u67e5\u905e\u6b78\u67e5\u8a62\u4e2d\u7684\u6240\u6709\u5f15\u7528\uff0c\u4ee5\u78ba\u4fdd\u5b83\u5011\u6709\u6548\u4e14\u6b63\u78ba\u5b9a\u7fa9\u3002\u78ba\u4fdd\u5f15\u7528\u7684\u8868\u6216\u5217\u5b58\u5728\u4e26\u5728\u67e5\u8a62\u4e2d\u53ef\u8a2a\u554f\u3002<\/p>\n<h3 id=\"step-5-test-the-query-PnIjBljtiI\">\u6b65\u9a5f 5\uff1a\u6e2c\u8a66\u67e5\u8a62<\/h3>\n<p>\u5728\u9032\u884c\u5fc5\u8981\u7684\u4fee\u6b63\u5f8c\uff0c\u6e2c\u8a66\u67e5\u8a62\u4ee5\u78ba\u4fdd\u4e0d\u518d\u51fa\u73fe PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P19 &#8211; invalid_recursion\u3002\u57f7\u884c\u67e5\u8a62\u4e26\u9a57\u8b49\u8fd4\u56de\u7684\u7d50\u679c\u662f\u5426\u7b26\u5408\u9810\u671f\uff0c\u4e14\u7121\u932f\u8aa4\u3002<\/p>\n<h2 id=\"summary-PnIjBljtiI\">\u7e3d\u7d50<\/h2>\n<p>\u7e3d\u4e4b\uff0cPostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P19 &#8211; invalid_recursion \u53ef\u4ee5\u901a\u904e\u4ed4\u7d30\u6aa2\u67e5\u548c\u4fee\u6b63\u905e\u6b78\u67e5\u8a62\u4f86\u89e3\u6c7a\u3002\u78ba\u4fdd\u67e5\u8a62\u5305\u542b &#8220;RECURSIVE&#8221; \u95dc\u9375\u5b57\uff0c\u5177\u6709\u6b63\u78ba\u7684\u7d50\u69cb\uff0c\u4e26\u5305\u542b\u6709\u6548\u7684\u5f15\u7528\u3002\u6309\u7167\u672c\u6587\u4e2d\u6982\u8ff0\u7684\u6b65\u9a5f\u64cd\u4f5c\uff0c\u53ef\u4ee5\u6210\u529f\u4fee\u5fa9\u6b64\u932f\u8aa4\uff0c\u4e26\u7e7c\u7e8c\u4f7f\u7528 PostgreSQL \u4f86\u6eff\u8db3\u4f60\u7684\u6578\u64da\u5eab\u9700\u6c42\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u6709\u95dc VPS \u8a17\u7ba1\u7684\u66f4\u591a\u4fe1\u606f\u53ca\u5176\u5c0d\u60a8\u696d\u52d9\u7684\u597d\u8655\uff0c\u8acb\u8a2a\u554f <a href=\"https:\/\/server.hk\">Server.HK<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u4fee\u5fa9 PostgreSQL &#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-21401","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21401","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=21401"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21401\/revisions"}],"predecessor-version":[{"id":24092,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21401\/revisions\/24092"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=21401"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=21401"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=21401"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}