{"id":178736,"date":"2024-11-08T20:28:22","date_gmt":"2024-11-08T12:28:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/178736\/"},"modified":"2024-11-08T20:28:23","modified_gmt":"2024-11-08T12:28:23","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%9a2201f-invalid_argument_for_power_function%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/178736\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a2201F &#8211; invalid_argument_for_power_function\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%9a2201f-invalid_argument_for_power_function-axAxXQOjKB\">\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a2201F &#8211; invalid_argument_for_power_function<\/h1>\n<p>\u5728\u4f7f\u7528PostgreSQL\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u4ee3\u78bc\uff0c\u5176\u4e2d\u4e4b\u4e00\u662f2201F &#8211; invalid_argument_for_power_function\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u51fa\u73fe\u5728\u4f7f\u7528<strong>POWER()<\/strong>\u51fd\u6578\u6642\uff0c\u7576\u50b3\u905e\u7d66\u8a72\u51fd\u6578\u7684\u53c3\u6578\u4e0d\u7b26\u5408\u8981\u6c42\u6642\uff0c\u5c31\u6703\u5f15\u767c\u6b64\u932f\u8aa4\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u6b64\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"%e7%90%86%e8%a7%a3power%e5%87%bd%e6%95%b8-axAxXQOjKB\">\u7406\u89e3POWER()\u51fd\u6578<\/h2>\n<p><strong>POWER()<\/strong>\u51fd\u6578\u7528\u65bc\u8a08\u7b97\u4e00\u500b\u6578\u7684\u51aa\u6b21\u65b9\uff0c\u5176\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>POWER(base, exponent)<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<strong>base<\/strong>\u662f\u5e95\u6578\uff0c<strong>exponent<\/strong>\u662f\u6307\u6578\u3002\u9019\u500b\u51fd\u6578\u7684\u8fd4\u56de\u503c\u662f\u5e95\u6578\u7684\u6307\u6578\u6b21\u65b9\u3002\u5982\u679c\u50b3\u905e\u7684\u53c3\u6578\u4e0d\u6b63\u78ba\uff0c\u5247\u6703\u5c0e\u81f42201F\u932f\u8aa4\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e5%8e%9f%e5%9b%a0-axAxXQOjKB\">\u932f\u8aa4\u539f\u56e0<\/h2>\n<p>2201F\u932f\u8aa4\u901a\u5e38\u7531\u4ee5\u4e0b\u5e7e\u500b\u539f\u56e0\u5f15\u8d77\uff1a<\/p>\n<ul>\n<li><strong>\u53c3\u6578\u985e\u578b\u4e0d\u6b63\u78ba\uff1a<\/strong>POWER()\u51fd\u6578\u8981\u6c42\u5e95\u6578\u548c\u6307\u6578\u5fc5\u9808\u662f\u6578\u5b57\u985e\u578b\u3002\u5982\u679c\u50b3\u905e\u4e86\u5b57\u7b26\u4e32\u6216\u5176\u4ed6\u985e\u578b\u7684\u6578\u64da\uff0c\u5247\u6703\u5f15\u767c\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u8ca0\u6578\u6307\u6578\u7684\u5e95\u6578\u70ba\u8ca0\uff1a<\/strong>\u5982\u679c\u5e95\u6578\u70ba\u8ca0\u6578\u4e14\u6307\u6578\u70ba\u975e\u6574\u6578\uff0c\u5247\u6703\u5c0e\u81f4\u7121\u6548\u7684\u8a08\u7b97\uff0c\u5f9e\u800c\u5f15\u767c\u932f\u8aa4\u3002<\/li>\n<li><strong>NULL\u503c\uff1a<\/strong>\u5982\u679c\u5e95\u6578\u6216\u6307\u6578\u70baNULL\uff0c\u5247POWER()\u51fd\u6578\u7121\u6cd5\u8a08\u7b97\uff0c\u9019\u4e5f\u6703\u5c0e\u81f4\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-axAxXQOjKB\">\u89e3\u6c7a\u65b9\u6848<\/h2>\n<p>\u8981\u4fee\u5fa92201F\u932f\u8aa4\uff0c\u53ef\u4ee5\u63a1\u53d6\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e5%8f%83%e6%95%b8%e9%a1%9e%e5%9e%8b-axAxXQOjKB\">1. \u6aa2\u67e5\u53c3\u6578\u985e\u578b<\/h3>\n<p>\u78ba\u4fdd\u50b3\u905e\u7d66POWER()\u51fd\u6578\u7684\u53c3\u6578\u662f\u6b63\u78ba\u7684\u6578\u5b57\u985e\u578b\u3002\u53ef\u4ee5\u4f7f\u7528<strong>CAST()<\/strong>\u51fd\u6578\u5c07\u5176\u4ed6\u985e\u578b\u8f49\u63db\u70ba\u6578\u5b57\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT POWER(CAST('2' AS NUMERIC), 3);<\/code><\/pre>\n<h3 id=\"2-%e8%99%95%e7%90%86%e8%b2%a0%e6%95%b8%e5%ba%95%e6%95%b8%e5%92%8c%e9%9d%9e%e6%95%b4%e6%95%b8%e6%8c%87%e6%95%b8-axAxXQOjKB\">2. \u8655\u7406\u8ca0\u6578\u5e95\u6578\u548c\u975e\u6574\u6578\u6307\u6578<\/h3>\n<p>\u5982\u679c\u5e95\u6578\u70ba\u8ca0\u6578\uff0c\u8acb\u78ba\u4fdd\u6307\u6578\u662f\u6574\u6578\u3002\u53ef\u4ee5\u4f7f\u7528\u689d\u4ef6\u8a9e\u53e5\u4f86\u6aa2\u67e5\u9019\u4e9b\u689d\u4ef6\uff1a<\/p>\n<pre><code>SELECT \n    CASE \n        WHEN base &lt; 0 AND exponent NOT IN (SELECT generate_series(1, 100)) THEN 'Invalid input'\n        ELSE POWER(base, exponent)\n    END\nFROM (SELECT -2 AS base, 0.5 AS exponent) AS subquery;<\/code><\/pre>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5null%e5%80%bc-axAxXQOjKB\">3. \u6aa2\u67e5NULL\u503c<\/h3>\n<p>\u5728\u8abf\u7528POWER()\u51fd\u6578\u4e4b\u524d\uff0c\u6aa2\u67e5\u53c3\u6578\u662f\u5426\u70baNULL\u3002\u5982\u679c\u6709NULL\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528<strong>COALESCE()<\/strong>\u51fd\u6578\u63d0\u4f9b\u9ed8\u8a8d\u503c\uff1a<\/p>\n<pre><code>SELECT POWER(COALESCE(base, 1), COALESCE(exponent, 0));<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-axAxXQOjKB\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL\u76842201F\u932f\u8aa4\u4ee3\u78bc\u901a\u5e38\u662f\u7531\u65bcPOWER()\u51fd\u6578\u7684\u53c3\u6578\u4e0d\u6b63\u78ba\u5f15\u8d77\u7684\u3002\u901a\u904e\u6aa2\u67e5\u53c3\u6578\u985e\u578b\u3001\u8655\u7406\u8ca0\u6578\u5e95\u6578\u548c\u975e\u6574\u6578\u6307\u6578\uff0c\u4ee5\u53ca\u6aa2\u67e5NULL\u503c\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\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u96f2\u4f3a\u670d\u5668<\/a>\u53ef\u4ee5\u63d0\u4f9b\u66f4\u597d\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002\u5e0c\u671b\u672c\u6587\u80fd\u5e6b\u52a9\u60a8\u89e3\u6c7aPostgreSQL\u4e2d\u7684\u76f8\u95dc\u554f\u984c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc2201F\uff1a\u7121\u6548\u7684power\u51fd\u6578\u53c3\u6578\uff0c\u89e3\u6c7a\u65b9\u6848\u548c\u6b65\u9a5f\u8a73\u89e3\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-178736","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178736","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=178736"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178736\/revisions"}],"predecessor-version":[{"id":178737,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178736\/revisions\/178737"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=178736"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=178736"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=178736"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}