{"id":21033,"date":"2024-01-02T06:40:26","date_gmt":"2024-01-02T06:40:26","guid":{"rendered":"https:\/\/server.hk\/blog\/21033\/"},"modified":"2024-11-14T10:37:46","modified_gmt":"2024-11-14T02:37:46","slug":"how-to-fix-postgresql-error-code-2202e-array_subscript_error","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/21033\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a2202E – array_subscript_error"},"content":{"rendered":"

\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a2202E – array_subscript_error<\/h1>\n

PostgreSQL \u662f\u4e00\u500b\u5f37\u5927\u7684\u958b\u6e90\u95dc\u806f\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\uff0c\u5b83\u4e5f\u4e0d\u514d\u51fa\u73fe\u932f\u8aa4\u548c\u554f\u984c\u3002PostgreSQL \u7528\u6236\u53ef\u80fd\u6703\u9047\u5230\u7684\u4e00\u500b\u5e38\u898b\u932f\u8aa4\u662f\u932f\u8aa4\u4ee3\u78bc 2202E \u7684 “array_subscript_error”\u3002\u7576\u5617\u8a66\u4f7f\u7528\u7121\u6548\u7684\u4e0b\u6a19\u6216\u7d22\u5f15\u8a2a\u554f\u6578\u7d44\u5143\u7d20\u6642\uff0c\u901a\u5e38\u6703\u51fa\u73fe\u6b64\u932f\u8aa4\u3002<\/p>\n

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

\u5728 PostgreSQL \u4e2d\u8655\u7406\u6578\u7d44\u6642\uff0c\u6bcf\u500b\u5143\u7d20\u90fd\u7531\u4e00\u500b\u7d22\u5f15\u6216\u4e0b\u6a19\u8b58\u5225\u3002\u7d22\u5f15\u5f9e\u7b2c\u4e00\u500b\u5143\u7d20\u7684 1 \u958b\u59cb\uff0c\u96a8\u5f8c\u6bcf\u500b\u5143\u7d20\u589e\u52a0 1\u3002\u7576\u60a8\u5617\u8a66\u4f7f\u7528\u8d85\u51fa\u7bc4\u570d\u6216\u7121\u6548\u7684\u7d22\u5f15\u8a2a\u554f\u6578\u7d44\u5143\u7d20\u6642\uff0c\u5c31\u6703\u767c\u751f “array_subscript_error”\u3002<\/p>\n

\u4f8b\u5982\uff0c\u8003\u616e\u4e00\u500b\u5305\u542b\u4e09\u500b\u5143\u7d20\u7684\u6578\u7d44\uff1a[1, 2, 3]\u3002\u5982\u679c\u60a8\u5617\u8a66\u4f7f\u7528\u7d22\u5f15 4 \u8a2a\u554f\u7b2c\u56db\u500b\u5143\u7d20\uff0c\u60a8\u5c07\u9047\u5230\u932f\u8aa4\u4ee3\u78bc 2202E \u7684 “array_subscript_error”\u3002<\/p>\n

\u4fee\u5fa9\u932f\u8aa4<\/h2>\n

\u8981\u4fee\u5fa9 PostgreSQL \u4e2d\u7684 “array_subscript_error”\uff0c\u60a8\u9700\u8981\u78ba\u4fdd\u4f7f\u7528\u6709\u6548\u4e14\u6b63\u78ba\u7684\u6578\u7d44\u4e0b\u6a19\u6216\u7d22\u5f15\u3002\u4ee5\u4e0b\u662f\u60a8\u53ef\u4ee5\u9075\u5faa\u7684\u4e00\u4e9b\u6b65\u9a5f\uff1a<\/p>\n

1. \u6aa2\u67e5\u6578\u7d44\u9577\u5ea6<\/h3>\n

\u5728\u8a2a\u554f\u6578\u7d44\u5143\u7d20\u4e4b\u524d\uff0c\u8acb\u78ba\u4fdd\u6aa2\u67e5\u6578\u7d44\u7684\u9577\u5ea6\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528 “array_length” \u51fd\u6578\u4f86\u78ba\u5b9a\u6578\u7d44\u4e2d\u5143\u7d20\u7684\u6578\u91cf\u3002\u4f8b\u5982\uff1a<\/p>\n

SELECT array_length(my_array, 1);<\/code><\/p>\n

\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de “my_array” \u5728\u7b2c\u4e00\u7dad\u5ea6\u7684\u9577\u5ea6\u3002\u5982\u679c\u60a8\u5617\u8a66\u8a2a\u554f\u7684\u7d22\u5f15\u5927\u65bc\u6578\u7d44\u9577\u5ea6\uff0c\u60a8\u9700\u8981\u76f8\u61c9\u5730\u8abf\u6574\u60a8\u7684\u4ee3\u78bc\u3002<\/p>\n

2. \u9a57\u8b49\u4e0b\u6a19<\/h3>\n

\u78ba\u4fdd\u60a8\u7528\u65bc\u8a2a\u554f\u6578\u7d44\u5143\u7d20\u7684\u4e0b\u6a19\u6216\u7d22\u5f15\u5728\u6709\u6548\u7bc4\u570d\u5167\u3002\u8acb\u8a18\u4f4f\uff0c\u6578\u7d44\u7d22\u5f15\u5f9e 1 \u958b\u59cb\uff0c\u56e0\u6b64\u5982\u679c\u60a8\u4f7f\u7528 0 \u6216\u8ca0\u6578\u4f5c\u70ba\u4e0b\u6a19\uff0c\u5c07\u6703\u5c0e\u81f4 “array_subscript_error”\u3002\u6b64\u5916\uff0c\u5982\u679c\u4e0b\u6a19\u8d85\u904e\u6578\u7d44\u9577\u5ea6\uff0c\u60a8\u4e5f\u6703\u9047\u5230\u540c\u6a23\u7684\u932f\u8aa4\u3002<\/p>\n

3. \u8655\u7406\u7a7a\u503c<\/h3>\n

\u5982\u679c\u60a8\u6b63\u5728\u8655\u7406\u7684\u6578\u7d44\u5305\u542b\u7a7a\u503c\uff0c\u5247\u9700\u8981\u9069\u7576\u8655\u7406\u5b83\u5011\u3002\u5617\u8a66\u8a2a\u554f\u7a7a\u7684\u6578\u7d44\u5143\u7d20\u4e5f\u6703\u89f8\u767c “array_subscript_error”\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528 “coalesce” \u51fd\u6578\u5c07\u7a7a\u503c\u66ff\u63db\u70ba\u9ed8\u8a8d\u503c\uff0c\u6216\u4ee5\u7b26\u5408\u60a8\u7684\u61c9\u7528\u908f\u8f2f\u7684\u65b9\u5f0f\u8655\u7406\u5b83\u5011\u3002<\/p>\n

4. \u8abf\u8a66\u548c\u6e2c\u8a66<\/h3>\n

\u5982\u679c\u5728\u9075\u5faa\u4e0a\u8ff0\u6b65\u9a5f\u5f8c\u4ecd\u7136\u9047\u5230 “array_subscript_error”\uff0c\u5247\u9700\u8981\u5fb9\u5e95\u8abf\u8a66\u548c\u6e2c\u8a66\u60a8\u7684\u4ee3\u78bc\u3002\u6aa2\u67e5\u662f\u5426\u5b58\u5728\u908f\u8f2f\u932f\u8aa4\u6216\u4e0d\u6b63\u78ba\u7684\u6578\u7d44\u64cd\u4f5c\u53ef\u80fd\u5c0e\u81f4\u554f\u984c\u3002\u60a8\u9084\u53ef\u4ee5\u4f7f\u7528\u7279\u5b9a\u65bc\u60a8\u7de8\u7a0b\u8a9e\u8a00\u6216\u958b\u767c\u74b0\u5883\u7684\u8abf\u8a66\u5de5\u5177\u548c\u6280\u8853\u4f86\u8b58\u5225\u932f\u8aa4\u7684\u6839\u672c\u539f\u56e0\u3002<\/p>\n

\u7e3d\u7d50<\/h2>\n

\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc 2202E – “array_subscript_error” \u9700\u8981\u4ed4\u7d30\u8655\u7406\u6578\u7d44\u4e0b\u6a19\u548c\u7d22\u5f15\u3002\u901a\u904e\u6aa2\u67e5\u6578\u7d44\u9577\u5ea6\u3001\u9a57\u8b49\u4e0b\u6a19\u3001\u8655\u7406\u7a7a\u503c\u548c\u5fb9\u5e95\u8abf\u8a66\uff0c\u60a8\u53ef\u4ee5\u89e3\u6c7a\u6b64\u932f\u8aa4\uff0c\u78ba\u4fdd PostgreSQL \u6578\u64da\u5eab\u7684\u9806\u5229\u904b\u884c\u3002<\/p>\n

\u5982\u9700\u53ef\u9760\u548c\u9ad8\u6548\u7684 VPS \u8a17\u7ba1\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e Server.HK<\/a>\u3002\u6191\u85c9\u6211\u5011\u4e00\u6d41\u7684 VPS \u8a17\u7ba1\u670d\u52d9\uff0c\u60a8\u53ef\u4ee5\u9ad4\u9a57\u865b\u64ec\u79c1\u6709\u4f3a\u670d\u5668\u7684\u5f37\u5927\u548c\u9748\u6d3b\u6027\uff0c\u6eff\u8db3\u60a8\u7684\u61c9\u7528\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-21033","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21033","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=21033"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21033\/revisions"}],"predecessor-version":[{"id":24248,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21033\/revisions\/24248"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=21033"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=21033"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=21033"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}