{"id":178874,"date":"2024-11-08T21:37:20","date_gmt":"2024-11-08T13:37:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/178874\/"},"modified":"2024-11-08T21:37:21","modified_gmt":"2024-11-08T13:37:21","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9postgresql%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc%ef%bc%9a34000-invalid_cursor_name%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/178874\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a34000 &#8211; invalid_cursor_name\uff1f"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9postgresql%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc%ef%bc%9a34000-invalid_cursor_name%ef%bc%9f-GibBqRWwag\">\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a34000 &#8211; invalid_cursor_name\uff1f<\/h1>\n<p>\u5728\u4f7f\u7528PostgreSQL\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\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\u78bc34000\uff0c\u8868\u793a\u201cinvalid_cursor_name\u201d\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u767c\u751f\u5728\u5617\u8a66\u4f7f\u7528\u4e00\u500b\u672a\u6b63\u78ba\u5b9a\u7fa9\u6216\u5df2\u7d93\u95dc\u9589\u7684\u6e38\u6a19\u6642\u3002\u672c\u6587\u5c07\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%e6%b8%b8%e6%a8%99%ef%bc%9f-GibBqRWwag\">\u4ec0\u9ebc\u662f\u6e38\u6a19\uff1f<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u6e38\u6a19\u662f\u4e00\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u7528\u65bc\u5728\u67e5\u8a62\u7d50\u679c\u4e2d\u9010\u884c\u8655\u7406\u6578\u64da\u3002\u6e38\u6a19\u5141\u8a31\u958b\u767c\u8005\u5728\u67e5\u8a62\u7d50\u679c\u4e2d\u9032\u884c\u904d\u6b77\uff0c\u4e26\u5c0d\u6bcf\u4e00\u884c\u6578\u64da\u57f7\u884c\u64cd\u4f5c\u3002PostgreSQL\u652f\u6301\u591a\u7a2e\u6e38\u6a19\u985e\u578b\uff0c\u5305\u62ec\u975c\u614b\u6e38\u6a19\u548c\u52d5\u614b\u6e38\u6a19\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc34000%e7%9a%84%e5%8e%9f%e5%9b%a0-GibBqRWwag\">\u932f\u8aa4\u4ee3\u78bc34000\u7684\u539f\u56e0<\/h2>\n<p>\u7576\u4f60\u5728PostgreSQL\u4e2d\u9047\u5230\u932f\u8aa4\u4ee3\u78bc34000\u6642\uff0c\u901a\u5e38\u662f\u7531\u65bc\u4ee5\u4e0b\u5e7e\u500b\u539f\u56e0\uff1a<\/p>\n<ul>\n<li><strong>\u6e38\u6a19\u540d\u7a31\u932f\u8aa4\uff1a<\/strong>\u5982\u679c\u4f60\u5617\u8a66\u4f7f\u7528\u4e00\u500b\u4e0d\u5b58\u5728\u7684\u6e38\u6a19\u540d\u7a31\uff0cPostgreSQL\u5c07\u7121\u6cd5\u8b58\u5225\u8a72\u6e38\u6a19\uff0c\u5f9e\u800c\u5f15\u767c\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u6e38\u6a19\u5df2\u95dc\u9589\uff1a<\/strong>\u5982\u679c\u6e38\u6a19\u5df2\u7d93\u88ab\u95dc\u9589\uff0c\u4efb\u4f55\u5c0d\u8a72\u6e38\u6a19\u7684\u64cd\u4f5c\u90fd\u6703\u5c0e\u81f4\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u4f5c\u7528\u57df\u554f\u984c\uff1a<\/strong>\u6e38\u6a19\u7684\u4f5c\u7528\u57df\u53ef\u80fd\u6703\u5f71\u97ff\u5176\u53ef\u7528\u6027\u3002\u5982\u679c\u6e38\u6a19\u5728\u4e00\u500b\u4e8b\u52d9\u4e2d\u5b9a\u7fa9\uff0c\u4f46\u5728\u53e6\u4e00\u500b\u4e8b\u52d9\u4e2d\u4f7f\u7528\uff0c\u5247\u53ef\u80fd\u6703\u51fa\u73fe\u6b64\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc34000-GibBqRWwag\">\u5982\u4f55\u4fee\u5fa9\u932f\u8aa4\u4ee3\u78bc34000<\/h2>\n<p>\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc34000\u7684\u5177\u9ad4\u6b65\u9a5f\u5982\u4e0b\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e6%b8%b8%e6%a8%99%e5%90%8d%e7%a8%b1-GibBqRWwag\">1. \u6aa2\u67e5\u6e38\u6a19\u540d\u7a31<\/h3>\n<p>\u9996\u5148\uff0c\u78ba\u4fdd\u4f60\u4f7f\u7528\u7684\u6e38\u6a19\u540d\u7a31\u662f\u6b63\u78ba\u7684\u3002\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0bSQL\u67e5\u8a62\u4f86\u6aa2\u67e5\u7576\u524d\u6d3b\u52d5\u7684\u6e38\u6a19\uff1a<\/p>\n<pre><code>SELECT * FROM pg_cursors;<\/code><\/pre>\n<p>\u9019\u5c07\u5217\u51fa\u7576\u524d\u6240\u6709\u6d3b\u52d5\u7684\u6e38\u6a19\uff0c\u78ba\u4fdd\u4f60\u6240\u4f7f\u7528\u7684\u6e38\u6a19\u540d\u7a31\u5728\u5217\u8868\u4e2d\u3002<\/p>\n<h3 id=\"2-%e7%a2%ba%e8%aa%8d%e6%b8%b8%e6%a8%99%e7%9a%84%e7%8b%80%e6%85%8b-GibBqRWwag\">2. \u78ba\u8a8d\u6e38\u6a19\u7684\u72c0\u614b<\/h3>\n<p>\u5982\u679c\u6e38\u6a19\u5df2\u7d93\u95dc\u9589\uff0c\u5247\u9700\u8981\u91cd\u65b0\u6253\u958b\u5b83\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u4f86\u91cd\u65b0\u5b9a\u7fa9\u6e38\u6a19\uff1a<\/p>\n<pre><code>DECLARE cursor_name CURSOR FOR SELECT * FROM your_table;<\/code><\/pre>\n<p>\u78ba\u4fdd\u5728\u4f7f\u7528\u6e38\u6a19\u4e4b\u524d\uff0c\u6e38\u6a19\u5df2\u7d93\u6b63\u78ba\u5730\u88ab\u8072\u660e\u548c\u6253\u958b\u3002<\/p>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5%e4%ba%8b%e5%8b%99%e7%af%84%e5%9c%8d-GibBqRWwag\">3. \u6aa2\u67e5\u4e8b\u52d9\u7bc4\u570d<\/h3>\n<p>\u5982\u679c\u6e38\u6a19\u662f\u5728\u4e00\u500b\u4e8b\u52d9\u4e2d\u5b9a\u7fa9\u7684\uff0c\u8acb\u78ba\u4fdd\u5728\u540c\u4e00\u4e8b\u52d9\u4e2d\u4f7f\u7528\u5b83\u3002\u6e38\u6a19\u7684\u4f5c\u7528\u57df\u662f\u6709\u9650\u7684\uff0c\u8d85\u51fa\u5176\u4f5c\u7528\u57df\u5c07\u5c0e\u81f4\u7121\u6cd5\u8a2a\u554f\u8a72\u6e38\u6a19\u3002<\/p>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8%e4%be%8b%e5%a4%96%e8%99%95%e7%90%86-GibBqRWwag\">4. \u4f7f\u7528\u4f8b\u5916\u8655\u7406<\/h3>\n<p>\u5728\u958b\u767c\u904e\u7a0b\u4e2d\uff0c\u5efa\u8b70\u4f7f\u7528\u4f8b\u5916\u8655\u7406\u4f86\u6355\u7372\u548c\u8655\u7406\u6b64\u985e\u932f\u8aa4\u3002\u53ef\u4ee5\u4f7f\u7528PL\/pgSQL\u7684\u4f8b\u5916\u8655\u7406\u6a5f\u5236\u4f86\u6355\u7372\u932f\u8aa4\u4e26\u9032\u884c\u76f8\u61c9\u7684\u8655\u7406\uff1a<\/p>\n<pre><code>BEGIN\n    -- \u5617\u8a66\u4f7f\u7528\u6e38\u6a19\nEXCEPTION\n    WHEN invalid_cursor_name THEN\n        RAISE NOTICE '\u6e38\u6a19\u540d\u7a31\u7121\u6548\uff0c\u8acb\u6aa2\u67e5\u6e38\u6a19\u7684\u5b9a\u7fa9\u548c\u72c0\u614b';\nEND;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-GibBqRWwag\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL\u932f\u8aa4\u4ee3\u78bc34000 &#8211; invalid_cursor_name\u901a\u5e38\u662f\u7531\u65bc\u6e38\u6a19\u540d\u7a31\u932f\u8aa4\u3001\u6e38\u6a19\u5df2\u95dc\u9589\u6216\u4f5c\u7528\u57df\u554f\u984c\u5f15\u8d77\u7684\u3002\u901a\u904e\u6aa2\u67e5\u6e38\u6a19\u540d\u7a31\u3001\u78ba\u8a8d\u6e38\u6a19\u72c0\u614b\u3001\u6aa2\u67e5\u4e8b\u52d9\u7bc4\u570d\u4ee5\u53ca\u4f7f\u7528\u4f8b\u5916\u8655\u7406\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u6b64\u932f\u8aa4\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u7a69\u5b9a\u6027\u548c\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc34000\uff1a\u7121\u6548\u7684\u6e38\u6a19\u540d\u7a31\uff0c\u89e3\u6c7a\u5e38\u898b\u7684\u6578\u64da\u5eab\u67e5\u8a62\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-178874","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178874","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=178874"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178874\/revisions"}],"predecessor-version":[{"id":178875,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178874\/revisions\/178875"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=178874"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=178874"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=178874"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}