{"id":96746,"date":"2024-10-20T12:01:19","date_gmt":"2024-10-20T04:01:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96746\/"},"modified":"2024-10-20T12:01:19","modified_gmt":"2024-10-20T04:01:19","slug":"postgresql-22012-division_by_zero-%e5%a0%b1%e9%8c%af-%e6%95%85%e9%9a%9c%e4%bf%ae%e5%be%a9-%e9%81%a0%e7%a8%8b%e8%99%95%e7%90%86","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/96746\/","title":{"rendered":"PostgreSQL 22012: division_by_zero \u5831\u932f \u6545\u969c\u4fee\u5fa9 \u9060\u7a0b\u8655\u7406"},"content":{"rendered":"

PostgreSQL 22012: division_by_zero \u5831\u932f \u6545\u969c\u4fee\u5fa9 \u9060\u7a0b\u8655\u7406<\/h1>\n

\u5728\u4f7f\u7528 PostgreSQL \u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f division_by_zero<\/code> \u932f\u8aa4\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u767c\u751f\u5728\u9032\u884c\u6578\u5b78\u904b\u7b97\u6642\uff0c\u7279\u5225\u662f\u7576\u9664\u6578\u70ba\u96f6\u6642\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u6210\u56e0\u3001\u4fee\u5fa9\u65b9\u6cd5\u4ee5\u53ca\u5982\u4f55\u9032\u884c\u9060\u7a0b\u8655\u7406\u3002<\/p>\n

division_by_zero \u932f\u8aa4\u7684\u6210\u56e0<\/h2>\n

\u5728 PostgreSQL \u4e2d\uff0c\u7576\u57f7\u884c\u4e00\u500b\u9664\u6cd5\u904b\u7b97\u6642\uff0c\u5982\u679c\u9664\u6578\u70ba\u96f6\uff0c\u7cfb\u7d71\u6703\u62cb\u51fa division_by_zero<\/code> \u932f\u8aa4\u3002\u9019\u662f\u56e0\u70ba\u6578\u5b78\u4e0a\u9664\u4ee5\u96f6\u662f\u672a\u5b9a\u7fa9\u7684\uff0c\u6578\u64da\u5eab\u7cfb\u7d71\u70ba\u4e86\u4fdd\u6301\u6578\u64da\u7684\u5b8c\u6574\u6027\uff0c\u6703\u963b\u6b62\u9019\u7a2e\u64cd\u4f5c\u3002<\/p>\n

\u4f8b\u5982\uff0c\u4ee5\u4e0b SQL \u67e5\u8a62\u5c07\u6703\u5c0e\u81f4\u6b64\u932f\u8aa4\uff1a<\/p>\n

SELECT 10 \/ 0;<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u56e0\u70ba\u9664\u6578\u70ba\u96f6\uff0cPostgreSQL \u5c07\u8fd4\u56de\u4e00\u500b\u932f\u8aa4\u4fe1\u606f\uff0c\u63d0\u793a division_by_zero<\/code>\u3002<\/p>\n
\u5982\u4f55\u4fee\u5fa9 division_by_zero \u932f\u8aa4<\/h2>\n
\u8981\u4fee\u5fa9\u9019\u500b\u932f\u8aa4\uff0c\u958b\u767c\u8005\u9700\u8981\u5728\u57f7\u884c\u9664\u6cd5\u904b\u7b97\u4e4b\u524d\u6aa2\u67e5\u9664\u6578\u662f\u5426\u70ba\u96f6\u3002\u53ef\u4ee5\u4f7f\u7528 CASE<\/code> \u8a9e\u53e5\u4f86\u907f\u514d\u9019\u7a2e\u60c5\u6cc1\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n
SELECT \n    CASE \n        WHEN divisor = 0 THEN NULL \n        ELSE numerator \/ divisor \n    END AS result\nFROM \n    your_table;<\/code><\/pre>\n
\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u7576 divisor<\/code> \u70ba\u96f6\u6642\uff0c\u7d50\u679c\u5c07\u8fd4\u56de NULL<\/code>\uff0c\u800c\u4e0d\u662f\u62cb\u51fa\u932f\u8aa4\u3002\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u907f\u514d division_by_zero<\/code> \u932f\u8aa4\u7684\u767c\u751f\u3002<\/p>\n
\u9060\u7a0b\u8655\u7406 division_by_zero \u932f\u8aa4<\/h2>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u958b\u767c\u8005\u53ef\u80fd\u9700\u8981\u9060\u7a0b\u8655\u7406 PostgreSQL \u6578\u64da\u5eab\u4e2d\u7684\u932f\u8aa4\u3002\u9019\u53ef\u4ee5\u901a\u904e\u4f7f\u7528 PostgreSQL \u7684\u65e5\u8a8c\u529f\u80fd\u4f86\u5be6\u73fe\u3002\u958b\u767c\u8005\u53ef\u4ee5\u8a2d\u7f6e\u65e5\u8a8c\u7d1a\u5225\uff0c\u4ee5\u4fbf\u5728\u51fa\u73fe\u932f\u8aa4\u6642\u7372\u53d6\u8a73\u7d30\u4fe1\u606f\u3002<\/p>\n
\u8981\u555f\u7528\u65e5\u8a8c\uff0c\u53ef\u4ee5\u5728 PostgreSQL \u7684\u914d\u7f6e\u6587\u4ef6\u4e2d\u9032\u884c\u8a2d\u7f6e\uff1a<\/p>\n
log_min_error_statement = error<\/code><\/pre>\n
\u9019\u6a23\u8a2d\u7f6e\u5f8c\uff0c\u6240\u6709\u932f\u8aa4\u7684 SQL \u8a9e\u53e5\u90fd\u6703\u88ab\u8a18\u9304\u5230\u65e5\u8a8c\u4e2d\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u901a\u904e\u67e5\u770b\u65e5\u8a8c\u4f86\u5206\u6790\u548c\u4fee\u5fa9\u554f\u984c\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
\u5728\u4f7f\u7528 PostgreSQL \u6642\uff0cdivision_by_zero<\/code> \u932f\u8aa4\u662f\u4e00\u500b\u5e38\u898b\u7684\u554f\u984c\uff0c\u4f46\u901a\u904e\u9069\u7576\u7684\u6aa2\u67e5\u548c\u8655\u7406\uff0c\u53ef\u4ee5\u6709\u6548\u907f\u514d\u6b64\u932f\u8aa4\u7684\u767c\u751f\u3002\u4f7f\u7528 CASE<\/code> \u8a9e\u53e5\u4f86\u6aa2\u67e5\u9664\u6578\uff0c\u4e26\u5229\u7528\u65e5\u8a8c\u529f\u80fd\u9032\u884c\u9060\u7a0b\u8655\u7406\uff0c\u90fd\u662f\u975e\u5e38\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 \u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u7528\u6236\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u61c9\u7528\u90e8\u7f72\uff0c\u6211\u5011\u7684 \u4e91\u670d\u52a1\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u89e3\u6c7a PostgreSQL 22012 \u7684 division_by_zero \u932f\u8aa4\uff0c\u63d0\u4f9b\u6545\u969c\u4fee\u5fa9\u548c\u9060\u7a0b\u8655\u7406\u65b9\u6848\uff0c\u78ba\u4fdd\u6578\u64da\u5eab\u7a69\u5b9a\u904b\u884c\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-96746","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96746","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=96746"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96746\/revisions"}],"predecessor-version":[{"id":96747,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96746\/revisions\/96747"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96746"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96746"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96746"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}