{"id":178782,"date":"2024-11-08T20:51:20","date_gmt":"2024-11-08T12:51:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/178782\/"},"modified":"2024-11-08T20:51:21","modified_gmt":"2024-11-08T12:51:21","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%9a22039-sql_json_array_not_found%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/178782\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a22039 &#8211; sql_json_array_not_found\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%9a22039-sql_json_array_not_found-jogedjpXtM\">\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a22039 &#8211; sql_json_array_not_found<\/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\u78bc22039\uff0c\u8a72\u932f\u8aa4\u901a\u5e38\u8868\u793a\u5728\u57f7\u884cJSON\u76f8\u95dc\u67e5\u8a62\u6642\uff0c\u6307\u5b9a\u7684JSON\u6578\u7d44\u672a\u627e\u5230\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u6df1\u5165\u63a2\u8a0e\u8a72\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u8655\u7406\u6b64\u554f\u984c\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc22039%e7%9a%84%e8%83%8c%e6%99%af-jogedjpXtM\">\u932f\u8aa4\u4ee3\u78bc22039\u7684\u80cc\u666f<\/h2>\n<p>PostgreSQL\u662f\u4e00\u500b\u5f37\u5927\u7684\u958b\u6e90\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u652f\u6301\u591a\u7a2e\u6578\u64da\u985e\u578b\uff0c\u5305\u62ecJSON\u548cJSONB\u3002\u7576\u4f60\u5617\u8a66\u5f9e\u4e00\u500bJSON\u6578\u7d44\u4e2d\u63d0\u53d6\u6578\u64da\u6642\uff0c\u5982\u679c\u6307\u5b9a\u7684\u6578\u7d44\u4e0d\u5b58\u5728\uff0c\u5247\u6703\u5f15\u767c\u932f\u8aa4\u4ee3\u78bc22039\u3002\u9019\u901a\u5e38\u767c\u751f\u5728\u4f7f\u7528`json_array_elements`\u6216`jsonb_array_elements`\u7b49\u51fd\u6578\u6642\u3002<\/p>\n<h2 id=\"%e5%b8%b8%e8%a6%8b%e5%8e%9f%e5%9b%a0-jogedjpXtM\">\u5e38\u898b\u539f\u56e0<\/h2>\n<ul>\n<li><strong>\u6578\u64da\u683c\u5f0f\u932f\u8aa4\uff1a<\/strong>\u5982\u679c\u4f60\u5617\u8a66\u5f9e\u4e00\u500b\u4e0d\u662f\u6578\u7d44\u7684JSON\u5c0d\u8c61\u4e2d\u63d0\u53d6\u6578\u64da\uff0c\u5247\u6703\u5c0e\u81f4\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u67e5\u8a62\u689d\u4ef6\u4e0d\u6b63\u78ba\uff1a<\/strong>\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u4e86\u932f\u8aa4\u7684\u9375\u540d\u6216\u7d22\u5f15\uff0c\u5c0e\u81f4\u7121\u6cd5\u627e\u5230\u6307\u5b9a\u7684\u6578\u7d44\u3002<\/li>\n<li><strong>\u6578\u64da\u7f3a\u5931\uff1a<\/strong>\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u67d0\u4e9b\u8a18\u9304\u53ef\u80fd\u7f3a\u5c11\u9810\u671f\u7684JSON\u6578\u7d44\u5b57\u6bb5\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%bc22039-jogedjpXtM\">\u5982\u4f55\u4fee\u5fa9\u932f\u8aa4\u4ee3\u78bc22039<\/h2>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e6%95%b8%e6%93%9a%e6%a0%bc%e5%bc%8f-jogedjpXtM\">1. \u6aa2\u67e5\u6578\u64da\u683c\u5f0f<\/h3>\n<p>\u9996\u5148\uff0c\u78ba\u4fdd\u4f60\u6b63\u5728\u67e5\u8a62\u7684\u6578\u64da\u78ba\u5be6\u662fJSON\u6578\u7d44\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u67e5\u8a62\u4f86\u6aa2\u67e5\u6578\u64da\u683c\u5f0f\uff1a<\/p>\n<pre><code>SELECT your_json_column\nFROM your_table\nWHERE your_condition;<\/code><\/pre>\n<p>\u6aa2\u67e5\u8fd4\u56de\u7684\u7d50\u679c\uff0c\u78ba\u4fdd`your_json_column`\u7684\u6578\u64da\u683c\u5f0f\u6b63\u78ba\u3002\u5982\u679c\u4e0d\u662f\u6578\u7d44\uff0c\u5247\u9700\u8981\u8abf\u6574\u6578\u64da\u6216\u67e5\u8a62\u3002<\/p>\n<h3 id=\"2-%e9%a9%97%e8%ad%89%e6%9f%a5%e8%a9%a2%e6%a2%9d%e4%bb%b6-jogedjpXtM\">2. \u9a57\u8b49\u67e5\u8a62\u689d\u4ef6<\/h3>\n<p>\u78ba\u4fdd\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u7684\u9375\u540d\u548c\u7d22\u5f15\u662f\u6b63\u78ba\u7684\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u4f7f\u7528`json_array_elements`\uff0c\u8acb\u78ba\u8a8d\u4f60\u6307\u5b9a\u7684\u6578\u7d44\u7d22\u5f15\u5b58\u5728\uff1a<\/p>\n<pre><code>SELECT json_array_elements(your_json_column-&gt;'your_array_key')\nFROM your_table\nWHERE your_condition;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c`your_array_key`\u5fc5\u9808\u662f\u5b58\u5728\u65bcJSON\u5c0d\u8c61\u4e2d\u7684\u6709\u6548\u9375\u540d\u3002<\/p>\n<h3 id=\"3-%e8%99%95%e7%90%86%e6%95%b8%e6%93%9a%e7%bc%ba%e5%a4%b1-jogedjpXtM\">3. \u8655\u7406\u6578\u64da\u7f3a\u5931<\/h3>\n<p>\u5982\u679c\u67d0\u4e9b\u8a18\u9304\u7f3a\u5c11\u9810\u671f\u7684JSON\u6578\u7d44\u5b57\u6bb5\uff0c\u53ef\u4ee5\u4f7f\u7528`COALESCE`\u51fd\u6578\u4f86\u8655\u7406\u9019\u7a2e\u60c5\u6cc1\uff0c\u907f\u514d\u67e5\u8a62\u5931\u6557\uff1a<\/p>\n<pre><code>SELECT json_array_elements(COALESCE(your_json_column-&gt;'your_array_key', '[]'::json))\nFROM your_table\nWHERE your_condition;<\/code><\/pre>\n<p>\u9019\u6a23\uff0c\u5373\u4f7f`your_array_key`\u4e0d\u5b58\u5728\uff0c\u67e5\u8a62\u4e5f\u6703\u8fd4\u56de\u4e00\u500b\u7a7a\u7684JSON\u6578\u7d44\uff0c\u800c\u4e0d\u6703\u5f15\u767c\u932f\u8aa4\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-jogedjpXtM\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL\u932f\u8aa4\u4ee3\u78bc22039\u901a\u5e38\u662f\u7531\u65bc\u6578\u64da\u683c\u5f0f\u932f\u8aa4\u3001\u67e5\u8a62\u689d\u4ef6\u4e0d\u6b63\u78ba\u6216\u6578\u64da\u7f3a\u5931\u5f15\u8d77\u7684\u3002\u901a\u904e\u6aa2\u67e5\u6578\u64da\u683c\u5f0f\u3001\u9a57\u8b49\u67e5\u8a62\u689d\u4ef6\u4ee5\u53ca\u8655\u7406\u6578\u64da\u7f3a\u5931\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u6b64\u932f\u8aa4\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u6216 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc22039\uff1asql_json_array_not_found\uff0c\u89e3\u6c7aJSON\u6578\u64da\u67e5\u8a62\u4e2d\u7684\u5e38\u898b\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-178782","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178782","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=178782"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178782\/revisions"}],"predecessor-version":[{"id":178783,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178782\/revisions\/178783"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=178782"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=178782"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=178782"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}