{"id":21208,"date":"2024-01-02T06:43:23","date_gmt":"2024-01-02T06:43:23","guid":{"rendered":"https:\/\/server.hk\/blog\/21208\/"},"modified":"2024-11-14T10:37:43","modified_gmt":"2024-11-14T02:37:43","slug":"how-to-fix-postgresql-error-code-22012-division_by_zero","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/21208\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a22012 – division_by_zero"},"content":{"rendered":"

\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a22012 – division_by_zero<\/h1>\n

PostgreSQL \u662f\u4e00\u6b3e\u529f\u80fd\u5f37\u5927\u7684\u958b\u6e90\u95dc\u806f\u5f0f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u3002\u7136\u800c\uff0c\u50cf\u6240\u6709\u8edf\u9ad4\u4e00\u6a23\uff0c\u5b83\u53ef\u80fd\u6703\u9047\u5230\u9700\u8981\u89e3\u6c7a\u7684\u932f\u8aa4\u3002 PostgreSQL \u7528\u6236\u5e38\u898b\u7684\u932f\u8aa4\u4e4b\u4e00\u662f\u932f\u8aa4\u4ee3\u78bc 22012 \u7684 \u201cdivision_by_zero\u201d \u932f\u8aa4\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u8a72\u932f\u8aa4\u7684\u6210\u56e0\u4e26\u63d0\u4f9b\u4fee\u5fa9\u6b65\u9a5f\u3002<\/p>\n

\u4e86\u89e3\u932f\u8aa4<\/h2>\n

\u7576\u60a8\u5728 PostgreSQL \u67e5\u8a62\u4e2d\u5617\u8a66\u5c07\u6578\u5b57\u9664\u4ee5\u96f6\u6642\uff0c\u5c07\u6703\u767c\u751f \u201cdivision_by_zero\u201d \u932f\u8aa4\u3002\u6b64\u932f\u8aa4\u767c\u51fa\u662f\u70ba\u4e86\u9632\u6b62\u6578\u5b78\u4e0d\u4e00\u81f4\u548c\u672a\u5b9a\u7fa9\u7684\u7d50\u679c\u3002\u7576\u6b64\u932f\u8aa4\u767c\u751f\u6642\uff0cPostgreSQL \u5c07\u6703\u5f15\u767c\u7570\u5e38\u4e26\u7d42\u6b62\u67e5\u8a62\u57f7\u884c\u3002<\/p>\n

\u8fa8\u8b58\u6210\u56e0<\/h2>\n

\u8981\u4fee\u5fa9 \u201cdivision_by_zero\u201d \u932f\u8aa4\uff0c\u9996\u5148\u5fc5\u9808\u78ba\u5b9a\u6839\u672c\u539f\u56e0\u3002\u8a72\u932f\u8aa4\u901a\u5e38\u767c\u751f\u5728\u67e5\u8a62\u4e2d\u5305\u542b\u9664\u6cd5\u904b\u7b97\u6642\uff0c\u800c\u9664\u6578\u70ba\u96f6\u3002\u4f8b\u5982\uff1a<\/p>\n

SELECT 10 \/ 0;\r\n<\/code><\/pre>\n
\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u5c07 10 \u9664\u4ee5 0 \u5c07\u89f8\u767c\u932f\u8aa4\u3002\u56e0\u6b64\uff0c\u5be9\u67e5\u60a8\u7684\u67e5\u8a62\u4e26\u78ba\u5b9a\u4efb\u4f55\u6d89\u53ca\u96f6\u4f5c\u70ba\u9664\u6578\u7684\u9664\u6cd5\u904b\u7b97\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n
\u4fee\u5fa9\u932f\u8aa4<\/h2>\n
\u4e00\u65e6\u60a8\u78ba\u5b9a\u4e86\u9020\u6210 \u201cdivision_by_zero\u201d \u932f\u8aa4\u7684\u67e5\u8a62\uff0c\u60a8\u53ef\u4ee5\u63a1\u53d6\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u6cd5\u4f86\u4fee\u5fa9\u5b83\uff1a<\/p>\n
1. \u6aa2\u67e5\u9664\u6578\u662f\u5426\u70ba\u96f6<\/h3>\n
\u6aa2\u67e5\u60a8\u7684\u67e5\u8a62\uff0c\u78ba\u4fdd\u60a8\u4e0d\u6703\u5c07\u4efb\u4f55\u6578\u5b57\u9664\u4ee5\u96f6\u3002\u5982\u679c\u767c\u73fe\u6709\u9019\u7a2e\u60c5\u6cc1\uff0c\u8acb\u4fee\u6539\u67e5\u8a62\u4ee5\u907f\u514d\u5c07\u6578\u5b57\u9664\u4ee5\u96f6\uff0c\u6216\u512a\u96c5\u5730\u8655\u7406\u5b83\u3002\u4f8b\u5982\uff1a<\/p>\n
SELECT CASE WHEN divisor != 0 THEN dividend \/ divisor ELSE 0 END;\r\n<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u67e5\u8a62\u5728\u57f7\u884c\u9664\u6cd5\u904b\u7b97\u4e4b\u524d\u6703\u6aa2\u67e5\u9664\u6578\u662f\u5426\u70ba\u96f6\u3002\u5982\u679c\u9664\u6578\u70ba\u96f6\uff0c\u5247\u8fd4\u56de 0 \u800c\u4e0d\u662f\u5f15\u767c\u932f\u8aa4\u3002<\/p>\n
2. \u4f7f\u7528 NULLIF \u51fd\u6578<\/h3>\n
NULLIF \u51fd\u6578\u53ef\u7528\u65bc\u8655\u7406\u9664\u4ee5\u96f6\u7684\u60c5\u5883\u3002\u5982\u679c\u5169\u500b\u53c3\u6578\u76f8\u7b49\uff0c\u5247\u8fd4\u56de NULL\uff1b\u5426\u5247\uff0c\u8fd4\u56de\u7b2c\u4e00\u500b\u53c3\u6578\u3002\u4f7f\u7528 NULLIF\uff0c\u53ef\u4ee5\u9632\u6b62\u5728\u9664\u6578\u70ba\u96f6\u6642\u57f7\u884c\u9664\u6cd5\u904b\u7b97\u3002\u4f8b\u5982\uff1a<\/p>\n
SELECT dividend \/ NULLIF(divisor, 0);\r\n<\/code><\/pre>\n
\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u5982\u679c\u9664\u6578\u70ba\u96f6\uff0cNULLIF \u51fd\u6578\u5c07\u8fd4\u56de NULL\uff0c\u5f9e\u800c\u9632\u6b62\u57f7\u884c\u9664\u6cd5\u904b\u7b97\u4e26\u907f\u958b\u932f\u8aa4\u3002<\/p>\n
3. \u4f7f\u7528 TRY…CATCH \u8655\u7406\u932f\u8aa4<\/h3>\n
\u5982\u679c\u60a8\u6b63\u5728\u4f7f\u7528 PostgreSQL 10 \u6216\u66f4\u9ad8\u7248\u672c\uff0c\u60a8\u53ef\u4ee5\u5229\u7528 TRY…CATCH \u5340\u584a\u4f86\u512a\u96c5\u5730\u8655\u7406\u932f\u8aa4\u3002\u901a\u904e\u5c07\u9664\u6cd5\u904b\u7b97\u653e\u5728 TRY \u5340\u584a\u4e2d\uff0c\u60a8\u53ef\u4ee5\u6355\u7372\u932f\u8aa4\u4e26\u5728\u4e0d\u7d42\u6b62\u67e5\u8a62\u57f7\u884c\u7684\u60c5\u6cc1\u4e0b\u9032\u884c\u8655\u7406\u3002\u4f8b\u5982\uff1a<\/p>\n
BEGIN\r\n  BEGIN\r\n    dividend := 10;\r\n    divisor := 0;\r\n    result := dividend \/ divisor;\r\n  EXCEPTION\r\n    WHEN division_by_zero THEN\r\n      result := 0;\r\n  END;\r\nEND;\r\n<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u9664\u6cd5\u904b\u7b97\u88ab\u653e\u7f6e\u5728 TRY \u5340\u584a\u5167\u3002\u5982\u679c\u767c\u751f division_by_zero \u932f\u8aa4\uff0c\u5247\u6703\u5728 EXCEPTION \u5340\u584a\u4e2d\u6355\u7372\uff0c\u4f7f\u60a8\u80fd\u5920\u6839\u64da\u9700\u8981\u8655\u7406\u932f\u8aa4\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
\u932f\u8aa4\u4ee3\u78bc 22012 \u7684 \u201cdivision_by_zero\u201d \u932f\u8aa4\u662f PostgreSQL \u7528\u6236\u53ef\u80fd\u6703\u9047\u5230\u7684\u5e38\u898b\u554f\u984c\u3002\u901a\u904e\u8b58\u5225\u5c0e\u81f4\u932f\u8aa4\u7684\u67e5\u8a62\u4e26\u61c9\u7528\u9069\u7576\u7684\u4fee\u5fa9\u63aa\u65bd\uff0c\u4f8b\u5982\u6aa2\u67e5\u96f6\u9664\u6578\u3001\u4f7f\u7528 NULLIF \u51fd\u6578\u6216\u4f7f\u7528 TRY…CATCH \u8655\u7406\u932f\u8aa4\uff0c\u60a8\u53ef\u4ee5\u89e3\u6c7a\u6b64\u932f\u8aa4\uff0c\u78ba\u4fdd PostgreSQL \u6578\u64da\u5eab\u7a69\u5b9a\u904b\u884c\u3002<\/p>\n
\u6b32\u4e86\u89e3\u66f4\u591a\u6709\u95dc VPS \u8a17\u7ba1\u89e3\u6c7a\u65b9\u6848\u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f Server.HK<\/a>\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-21208","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21208","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=21208"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21208\/revisions"}],"predecessor-version":[{"id":24245,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21208\/revisions\/24245"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=21208"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=21208"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=21208"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}