{"id":21421,"date":"2024-01-02T09:06:22","date_gmt":"2024-01-02T09:06:22","guid":{"rendered":"https:\/\/server.hk\/blog\/21421\/"},"modified":"2024-11-14T10:34:43","modified_gmt":"2024-11-14T02:34:43","slug":"how-to-fix-postgresql-error-code-42p05-duplicate_prepared_statement","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/21421\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P05 – duplicate_prepared_statement"},"content":{"rendered":"

\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P05 – duplicate_prepared_statement<\/h1>\n

PostgreSQL \u662f\u4e00\u500b\u5f37\u5927\u7684\u958b\u6e90\u95dc\u806f\u5f0f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u5927\u4f01\u696d\u548c\u958b\u767c\u8005\u3002\u7136\u800c\uff0c\u8207\u6240\u6709\u8edf\u4ef6\u4e00\u6a23\uff0c\u5b83\u4e5f\u53ef\u80fd\u9047\u5230\u4e00\u4e9b\u932f\u8aa4\uff0c\u5f71\u97ff\u5176\u529f\u80fd\u3002\u5176\u4e2d\u4e00\u500b\u932f\u8aa4\u662f PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P05 – duplicate_prepared_statement\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u5c07\u63a2\u8a0e\u8a72\u932f\u8aa4\u7684\u6210\u56e0\u4e26\u63d0\u4f9b\u5206\u6b65\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n

\u7406\u89e3\u932f\u8aa4<\/h2>\n

PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P05 – duplicate_prepared_statement \u662f\u6307\u5728\u5617\u8a66\u5275\u5efa\u4e00\u500b\u5df2\u5b58\u5728\u540d\u7a31\u7684\u9810\u5099\u8a9e\u53e5\u6642\u767c\u751f\u7684\u932f\u8aa4\u3002\u9810\u5099\u8a9e\u53e5\u662f\u6307\u5df2\u7d93\u5728\u6578\u64da\u5eab\u670d\u52d9\u5668\u4e0a\u89e3\u6790\u3001\u7de8\u8b6f\u4e26\u5132\u5b58\u4ee5\u4f9b\u65e5\u5f8c\u4f7f\u7528\u7684 SQL \u8a9e\u53e5\u3002\u5b83\u5011\u901a\u904e\u6e1b\u5c11\u53cd\u8986\u89e3\u6790\u548c\u8a08\u5283\u67e5\u8a62\u7684\u958b\u92b7\u4f86\u63d0\u4f9b\u6027\u80fd\u4e0a\u7684\u597d\u8655\u3002<\/p>\n

\u932f\u8aa4\u539f\u56e0<\/h2>\n
    \n
  1. \u91cd\u8907\u4f7f\u7528\u9810\u5099\u8a9e\u53e5\u540d\u7a31\uff1a<\/strong> \u5982\u679c\u4f60\u5617\u8a66\u4f7f\u7528\u4e00\u500b\u5df2\u7d93\u5b58\u5728\u7684\u540d\u7a31\u4f86\u5275\u5efa\u9810\u5099\u8a9e\u53e5\uff0cPostgreSQL \u6703\u62cb\u51fa duplicate_prepared_statement \u932f\u8aa4\u3002\u9019\u7a2e\u60c5\u6cc1\u53ef\u80fd\u6703\u767c\u751f\u5728\u4f60\u591a\u6b21\u57f7\u884c\u76f8\u540c\u4ee3\u78bc\uff0c\u800c\u6c92\u6709\u6b63\u78ba\u91cb\u653e\u6216\u91cd\u7528\u9810\u5099\u8a9e\u53e5\u6642\u3002<\/li>\n
  2. \u4e26\u884c\u9023\u63a5\uff1a<\/strong> \u5728\u591a\u7528\u6236\u74b0\u5883\u4e2d\uff0c\u5982\u679c\u591a\u500b\u9023\u63a5\u540c\u6642\u5617\u8a66\u5275\u5efa\u76f8\u540c\u540d\u7a31\u7684\u9810\u5099\u8a9e\u53e5\uff0c\u53ef\u80fd\u6703\u51fa\u73fe\u6b64\u932f\u8aa4\u3002\u9019\u7a2e\u60c5\u6cc1\u901a\u5e38\u767c\u751f\u65bc\u4f7f\u7528\u9023\u63a5\u6c60\u6216\u4e26\u767c\u57f7\u884c\u6846\u67b6\u6642\u3002<\/li>\n<\/ol>\n

    \u89e3\u6c7a\u65b9\u6848<\/h2>\n

    1. \u91cb\u653e\u73fe\u6709\u7684\u9810\u5099\u8a9e\u53e5<\/h3>\n

    \u5728\u5275\u5efa\u65b0\u7684\u9810\u5099\u8a9e\u53e5\u4e4b\u524d\uff0c\u78ba\u4fdd\u91cb\u653e\u4efb\u4f55\u5177\u6709\u76f8\u540c\u540d\u7a31\u7684\u73fe\u6709\u8a9e\u53e5\u3002\u4f60\u53ef\u4ee5\u4f7f\u7528 DEALLOCATE \u8a9e\u53e5\u5f9e\u5167\u5b58\u4e2d\u79fb\u9664\u9810\u5099\u8a9e\u53e5\u3002\u4f8b\u5982\uff1a<\/p>\n

    DEALLOCATE name_of_prepared_statement;<\/code><\/pre>\n
    2. \u4f7f\u7528\u552f\u4e00\u540d\u7a31\u7684\u9810\u5099\u8a9e\u53e5<\/h3>\n
    \u70ba\u907f\u514d\u885d\u7a81\uff0c\u8acb\u59cb\u7d42\u70ba\u4f60\u7684\u9810\u5099\u8a9e\u53e5\u4f7f\u7528\u552f\u4e00\u540d\u7a31\u3002\u8003\u616e\u5c07\u552f\u4e00\u6a19\u8b58\u7b26\uff08\u5982\u6642\u9593\u6233\u6216\u6703\u8a71\u7279\u5b9a\u503c\uff09\u7d0d\u5165\u540d\u7a31\u3002\u9019\u7a2e\u65b9\u6cd5\u53ef\u78ba\u4fdd\u6bcf\u500b\u9810\u5099\u8a9e\u53e5\u90fd\u6709\u4e0d\u540c\u7684\u540d\u7a31\uff0c\u5f9e\u800c\u6e1b\u5c11\u9047\u5230\u932f\u8aa4\u7684\u6a5f\u6703\u3002<\/p>\n
    3. \u5be6\u65bd\u9023\u63a5\u6c60\u7b56\u7565<\/h3>\n
    \u5982\u679c\u4f60\u6b63\u5728\u4f7f\u7528\u9023\u63a5\u6c60\uff0c\u8acb\u78ba\u4fdd\u8a72\u6c60\u6b63\u78ba\u914d\u7f6e\u4ee5\u8655\u7406\u9810\u5099\u8a9e\u53e5\u3002\u6709\u4e9b\u9023\u63a5\u6c60\u5eab\u53ef\u80fd\u4e0d\u6703\u81ea\u52d5\u91cb\u653e\u9810\u5099\u8a9e\u53e5\uff0c\u5f9e\u800c\u5c0e\u81f4\u885d\u7a81\u3002\u53c3\u8003\u4f60\u7684\u9023\u63a5\u6c60\u5eab\u7684\u6587\u6a94\uff0c\u4e86\u89e3\u5982\u4f55\u6709\u6548\u7ba1\u7406\u9810\u5099\u8a9e\u53e5\u3002<\/p>\n
    4. \u512a\u5316\u9810\u5099\u8a9e\u53e5\u7684\u4f7f\u7528<\/h3>\n
    \u8a55\u4f30\u4f60\u7684\u4ee3\u78bc\uff0c\u78ba\u4fdd\u9ad8\u6548\u4f7f\u7528\u9810\u5099\u8a9e\u53e5\u3002\u907f\u514d\u5275\u5efa\u4e0d\u5fc5\u8981\u7684\u9810\u5099\u8a9e\u53e5\u6216\u904e\u65bc\u983b\u7e41\u5730\u5275\u5efa\u5b83\u5011\u3002\u76e1\u53ef\u80fd\u91cd\u7528\u9810\u5099\u8a9e\u53e5\uff0c\u6709\u52a9\u65bc\u964d\u4f4e\u9047\u5230\u932f\u8aa4\u7684\u98a8\u96aa\u3002<\/p>\n
    \u7e3d\u7d50<\/h2>\n
    PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P05 – duplicate_prepared_statement \u6703\u5728\u5617\u8a66\u5275\u5efa\u4e00\u500b\u5df2\u5b58\u5728\u540d\u7a31\u7684\u9810\u5099\u8a9e\u53e5\u6642\u767c\u751f\u3002\u8981\u89e3\u6c7a\u6b64\u932f\u8aa4\uff0c\u53ef\u4ee5\u91cb\u653e\u4efb\u4f55\u5177\u6709\u76f8\u540c\u540d\u7a31\u7684\u73fe\u6709\u9810\u5099\u8a9e\u53e5\uff0c\u4f7f\u7528\u552f\u4e00\u7684\u9810\u5099\u8a9e\u53e5\u540d\u7a31\uff0c\u6709\u6548\u5be6\u65bd\u9023\u63a5\u6c60\u7b56\u7565\uff0c\u4e26\u512a\u5316\u9810\u5099\u8a9e\u53e5\u7684\u4f7f\u7528\u3002\u5982\u679c\u4f60\u5728\u4f7f\u7528 PostgreSQL \u6642\u9047\u5230\u6b64\u932f\u8aa4\uff0c\u8acb\u8003\u616e\u9078\u64c7 Server.HK \u63d0\u4f9b\u53ef\u9760\u4e14\u9ad8\u6548\u7684 VPS \u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n
    \u6211\u5011\u7684 \u9999\u6e2f VPS<\/a> \u8a17\u7ba1\u670d\u52d9\u63d0\u4f9b\u5353\u8d8a\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\uff0c\u78ba\u4fdd\u4f60\u7684 PostgreSQL \u6578\u64da\u5eab\u5e73\u7a69\u904b\u884c\u3002\u4eca\u5929\u5c31\u806f\u7d61\u6211\u5011\uff0c\u4e86\u89e3\u66f4\u591a\u95dc\u65bc\u5982\u4f55\u6eff\u8db3\u4f60\u7684 VPS \u8a17\u7ba1\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5982\u4f55\u4fee\u5fa9 PostgreSQL ...<\/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-21421","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21421","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=21421"}],"version-history":[{"count":2,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21421\/revisions"}],"predecessor-version":[{"id":24070,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21421\/revisions\/24070"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=21421"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=21421"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=21421"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}