{"id":21335,"date":"2024-01-02T07:40:25","date_gmt":"2024-01-02T07:40:25","guid":{"rendered":"https:\/\/server.hk\/blog\/21335\/"},"modified":"2024-11-14T10:36:31","modified_gmt":"2024-11-14T02:36:31","slug":"how-to-fix-postgresql-error-code-2203a-sql_json_member_not_found","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/21335\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a2203A &#8211; sql_json_member_not_found"},"content":{"rendered":"<h1>\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a2203A &#8211; sql_json_member_not_found<\/h1>\n<p>PostgreSQL \u662f\u4e00\u500b\u5f37\u5927\u7684\u958b\u6e90\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5f0f\u4e2d\u3002\u7136\u800c\uff0c\u50cf\u4efb\u4f55\u8edf\u4ef6\u4e00\u6a23\uff0c\u5b83\u4e5f\u53ef\u80fd\u6703\u9047\u5230\u4e00\u4e9b\u932f\u8aa4\uff0c\u9019\u4e9b\u932f\u8aa4\u53ef\u80fd\u6703\u5e72\u64fe\u5176\u6b63\u5e38\u904b\u884c\u3002\u5176\u4e2d\u4e00\u500b\u932f\u8aa4\u662f PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a2203A &#8211; sql_json_member_not_found\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u5c07\u63a2\u8a0e\u6b64\u932f\u8aa4\u7684\u539f\u56e0\u4e26\u63d0\u4f9b\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2>\u4e86\u89e3\u932f\u8aa4<\/h2>\n<p>PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a2203A &#8211; sql_json_member_not_found \u7576 JSON \u5c0d\u8c61\u4e2d\u4e0d\u5305\u542b\u6307\u5b9a\u6210\u54e1\u6642\u6703\u767c\u751f\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u5728\u4f7f\u7528 &#8220;-&gt;&#8221; \u64cd\u4f5c\u7b26\u5617\u8a66\u8a2a\u554f JSON \u5c0d\u8c61\u4e2d\u4e0d\u5b58\u5728\u7684\u6210\u54e1\u6642\u7522\u751f\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u8003\u616e\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT json_column -&gt; 'non_existent_member' FROM table_name;<\/code><\/pre>\n<p>\u5982\u679c &#8216;non_existent_member&#8217; \u5728 &#8216;json_column&#8217; \u5217\u4e2d\u5b58\u5132\u7684 JSON \u5c0d\u8c61\u4e2d\u4e0d\u5b58\u5728\uff0cPostgreSQL \u5c07\u62cb\u51fa sql_json_member_not_found \u932f\u8aa4\u3002<\/p>\n<h2>\u53ef\u80fd\u7684\u539f\u56e0<\/h2>\n<p>\u9019\u500b\u932f\u8aa4\u53ef\u80fd\u7531\u5e7e\u500b\u539f\u56e0\u5f15\u8d77\uff1a<\/p>\n<ul>\n<li>JSON \u5c0d\u8c61\u4e0d\u5305\u542b\u6307\u5b9a\u7684\u6210\u54e1\u3002<\/li>\n<li>JSON \u5c0d\u8c61\u70ba null \u6216\u7a7a\u3002<\/li>\n<li>\u5217\u540d\u6216\u8868\u540d\u4e0d\u6b63\u78ba\u3002<\/li>\n<\/ul>\n<h2>\u4fee\u5fa9\u932f\u8aa4<\/h2>\n<p>\u8981\u89e3\u6c7a PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a2203A &#8211; sql_json_member_not_found\uff0c\u60a8\u53ef\u4ee5\u63a1\u53d6\u4ee5\u4e0b\u6b65\u9a5f\uff1a<\/p>\n<h3>1. \u6aa2\u67e5 JSON \u5c0d\u8c61<\/h3>\n<p>\u78ba\u4fdd JSON \u5c0d\u8c61\u5305\u542b\u6307\u5b9a\u7684\u6210\u54e1\u3002\u4ed4\u7d30\u6aa2\u67e5\u9375\u540d\u4e26\u9a57\u8b49\u5176\u5728 JSON \u5c0d\u8c61\u4e2d\u7684\u5b58\u5728\u6027\u3002\u5982\u679c\u6210\u54e1\u7f3a\u5931\uff0c\u60a8\u53ef\u4ee5\u4fee\u6539 JSON \u5c0d\u8c61\u6216\u76f8\u61c9\u5730\u66f4\u65b0\u67e5\u8a62\u3002<\/p>\n<h3>2. \u8655\u7406 null \u6216\u7a7a\u7684 JSON \u5c0d\u8c61<\/h3>\n<p>\u5982\u679c JSON \u5c0d\u8c61\u53ef\u80fd\u70ba null \u6216\u7a7a\uff0c\u60a8\u61c9\u8a72\u5728\u67e5\u8a62\u4e2d\u8655\u7406\u9019\u7a2e\u60c5\u6cc1\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528 &#8220;IS NULL&#8221; \u6216 &#8220;IS NOT NULL&#8221; \u689d\u4ef6\u6aa2\u67e5 null \u503c\uff0c\u4e26\u4f7f\u7528 &#8220;jsonb_typeof&#8221; \u51fd\u6578\u4f86\u78ba\u5b9a JSON \u5c0d\u8c61\u662f\u5426\u70ba\u7a7a\u3002<\/p>\n<pre><code>SELECT CASE\r\n         WHEN json_column IS NULL THEN '\u8655\u7406 null \u60c5\u6cc1'\r\n         WHEN jsonb_typeof(json_column) = 'object' AND json_column -&gt; 'member' IS NULL THEN '\u8655\u7406\u7a7a\u5c0d\u8c61\u60c5\u6cc1'\r\n         ELSE json_column -&gt; 'member'\r\n       END\r\nFROM table_name;<\/code><\/pre>\n<h3>3. \u9a57\u8b49\u5217\u540d\u548c\u8868\u540d<\/h3>\n<p>\u78ba\u4fdd\u67e5\u8a62\u4e2d\u7684\u5217\u540d\u548c\u8868\u540d\u6b63\u78ba\u3002\u7c21\u55ae\u7684\u62fc\u5beb\u932f\u8aa4\u53ef\u80fd\u5c0e\u81f4 sql_json_member_not_found \u932f\u8aa4\u3002\u4ed4\u7d30\u6aa2\u67e5\u540d\u7a31\u4e26\u505a\u51fa\u5fc5\u8981\u7684\u66f4\u6b63\u3002<\/p>\n<h2>\u7e3d\u7d50<\/h2>\n<p>\u7e3d\u7d50\u4f86\u8aaa\uff0cPostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a2203A &#8211; sql_json_member_not_found \u767c\u751f\u5728 JSON \u5c0d\u8c61\u4e2d\u4e0d\u5305\u542b\u6307\u5b9a\u6210\u54e1\u6642\u3002\u8981\u4fee\u5fa9\u6b64\u932f\u8aa4\uff0c\u60a8\u61c9\u9a57\u8b49\u6210\u54e1\u5728 JSON \u5c0d\u8c61\u4e2d\u7684\u5b58\u5728\u6027\uff0c\u9069\u7576\u8655\u7406 null \u6216\u7a7a\u7684 JSON \u5c0d\u8c61\uff0c\u4e26\u78ba\u4fdd\u67e5\u8a62\u4e2d\u7684\u5217\u540d\u548c\u8868\u540d\u7684\u6e96\u78ba\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u9047\u5230\u6b64\u932f\u8aa4\u6216\u9700\u8981 PostgreSQL \u8a17\u7ba1\u7684\u5354\u52a9\uff0c\u8003\u616e\u4f7f\u7528 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\u3002\u6191\u85c9\u6211\u5011\u53ef\u9760\u4e14\u9ad8\u6027\u80fd\u7684 VPS \u8a17\u7ba1\u89e3\u6c7a\u65b9\u6848\uff0c\u60a8\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u9806\u5229\u548c\u9ad8\u6548\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-21335","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21335","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=21335"}],"version-history":[{"count":2,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21335\/revisions"}],"predecessor-version":[{"id":24170,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21335\/revisions\/24170"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=21335"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=21335"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=21335"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}