{"id":178734,"date":"2024-11-08T20:27:20","date_gmt":"2024-11-08T12:27:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/178734\/"},"modified":"2024-11-08T20:27:21","modified_gmt":"2024-11-08T12:27:21","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%9a2201e-invalid_argument_for_logarithm%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/178734\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a2201E &#8211; invalid_argument_for_logarithm\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%9a2201e-invalid_argument_for_logarithm-wfHpJENmCX\">\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a2201E &#8211; invalid_argument_for_logarithm<\/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\u662f2201E &#8211; invalid_argument_for_logarithm\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u51fa\u73fe\u5728\u5617\u8a66\u8a08\u7b97\u5c0d\u6578\u6642\uff0c\u7576\u50b3\u905e\u7d66\u5c0d\u6578\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\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e5%8e%9f%e5%9b%a0-wfHpJENmCX\">\u932f\u8aa4\u539f\u56e0<\/h2>\n<p>PostgreSQL\u4e2d\u7684\u5c0d\u6578\u51fd\u6578\uff08\u5982 <code>ln()<\/code> \u548c <code>log()<\/code>\uff09\u8981\u6c42\u5176\u53c3\u6578\u5fc5\u9808\u662f\u6b63\u6578\u3002\u7576\u50b3\u905e\u7684\u53c3\u6578\u70ba\u96f6\u6216\u8ca0\u6578\u6642\uff0c\u7cfb\u7d71\u5c07\u7121\u6cd5\u8a08\u7b97\u5c0d\u6578\uff0c\u5f9e\u800c\u5f15\u767c2201E\u932f\u8aa4\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u60c5\u6cc1\uff0c\u53ef\u80fd\u5c0e\u81f4\u6b64\u932f\u8aa4\u7684\u767c\u751f\uff1a<\/p>\n<ul>\n<li><strong>\u96f6\u6216\u8ca0\u6578\u4f5c\u70ba\u53c3\u6578\uff1a<\/strong>\u5c0d\u6578\u51fd\u6578\u4e0d\u63a5\u53d7\u96f6\u6216\u8ca0\u6578\u4f5c\u70ba\u6709\u6548\u8f38\u5165\u3002<\/li>\n<li><strong>\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\uff1a<\/strong>\u5982\u679c\u50b3\u905e\u7684\u53c3\u6578\u985e\u578b\u4e0d\u6b63\u78ba\uff0c\u4f8b\u5982\u5c07\u5b57\u7b26\u4e32\u50b3\u905e\u7d66\u6578\u5b57\u51fd\u6578\uff0c\u4e5f\u53ef\u80fd\u5c0e\u81f4\u932f\u8aa4\u3002<\/li>\n<li><strong>\u8a08\u7b97\u7d50\u679c\u70ba\u96f6\u6216\u8ca0\u6578\uff1a<\/strong>\u5728\u67d0\u4e9b\u8a08\u7b97\u4e2d\uff0c\u53ef\u80fd\u6703\u51fa\u73fe\u7d50\u679c\u70ba\u96f6\u6216\u8ca0\u6578\u7684\u60c5\u6cc1\uff0c\u9019\u4e5f\u6703\u5f15\u767c\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-wfHpJENmCX\">\u5982\u4f55\u4fee\u5fa9\u932f\u8aa4<\/h2>\n<p>\u8981\u4fee\u5fa92201E\u932f\u8aa4\uff0c\u958b\u767c\u8005\u9700\u8981\u6aa2\u67e5\u50b3\u905e\u7d66\u5c0d\u6578\u51fd\u6578\u7684\u53c3\u6578\uff0c\u78ba\u4fdd\u5b83\u5011\u7b26\u5408\u8981\u6c42\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5177\u9ad4\u7684\u6b65\u9a5f\u548c\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e5%8f%83%e6%95%b8%e5%80%bc-wfHpJENmCX\">1. \u6aa2\u67e5\u53c3\u6578\u503c<\/h3>\n<p>\u9996\u5148\uff0c\u6aa2\u67e5\u50b3\u905e\u7d66\u5c0d\u6578\u51fd\u6578\u7684\u53c3\u6578\u503c\u3002\u78ba\u4fdd\u5b83\u5011\u90fd\u662f\u6b63\u6578\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT ln(-5); -- \u9019\u5c07\u5f15\u767c2201E\u932f\u8aa4\nSELECT ln(0);  -- \u9019\u4e5f\u6703\u5f15\u767c2201E\u932f\u8aa4\nSELECT ln(10); -- \u9019\u662f\u6709\u6548\u7684\uff0c\u5c07\u8fd4\u56de2.302585\n<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e6%a2%9d%e4%bb%b6%e8%aa%9e%e5%8f%a5-wfHpJENmCX\">2. \u4f7f\u7528\u689d\u4ef6\u8a9e\u53e5<\/h3>\n<p>\u5982\u679c\u53c3\u6578\u7684\u503c\u53ef\u80fd\u70ba\u96f6\u6216\u8ca0\u6578\uff0c\u53ef\u4ee5\u4f7f\u7528\u689d\u4ef6\u8a9e\u53e5\u4f86\u907f\u514d\u932f\u8aa4\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT CASE \n           WHEN value &gt; 0 THEN ln(value) \n           ELSE NULL \n       END AS log_value\nFROM your_table;\n<\/code><\/pre>\n<p>\u9019\u6a23\uff0c\u7576 <code>value<\/code> \u70ba\u96f6\u6216\u8ca0\u6578\u6642\uff0c\u5c07\u8fd4\u56deNULL\uff0c\u800c\u4e0d\u662f\u5f15\u767c\u932f\u8aa4\u3002<\/p>\n<h3 id=\"3-%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e6%aa%a2%e6%9f%a5-wfHpJENmCX\">3. \u6578\u64da\u985e\u578b\u6aa2\u67e5<\/h3>\n<p>\u78ba\u4fdd\u50b3\u905e\u7d66\u5c0d\u6578\u51fd\u6578\u7684\u53c3\u6578\u985e\u578b\u6b63\u78ba\u3002\u5982\u679c\u9700\u8981\uff0c\u53ef\u4ee5\u4f7f\u7528\u985e\u578b\u8f49\u63db\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT ln(CAST('10' AS numeric)); -- \u5c07\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u6578\u5b57\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-wfHpJENmCX\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL\u932f\u8aa4\u4ee3\u78bc2201E &#8211; invalid_argument_for_logarithm\u901a\u5e38\u662f\u7531\u65bc\u50b3\u905e\u7d66\u5c0d\u6578\u51fd\u6578\u7684\u53c3\u6578\u4e0d\u7b26\u5408\u8981\u6c42\u6240\u5f15\u8d77\u7684\u3002\u901a\u904e\u6aa2\u67e5\u53c3\u6578\u503c\u3001\u4f7f\u7528\u689d\u4ef6\u8a9e\u53e5\u4ee5\u53ca\u78ba\u4fdd\u6578\u64da\u985e\u578b\u6b63\u78ba\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u6b64\u932f\u8aa4\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u904b\u884c\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\uff0c\u4ee5\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u9ad8\u6548\u904b\u884c\u548c\u7ba1\u7406\u3002\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc2201E\uff1ainvalid_argument_for_logarithm\uff0c\u89e3\u6c7a\u6578\u5b78\u904b\u7b97\u4e2d\u7684\u7121\u6548\u53c3\u6578\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-178734","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178734","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=178734"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178734\/revisions"}],"predecessor-version":[{"id":178735,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178734\/revisions\/178735"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=178734"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=178734"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=178734"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}