{"id":91454,"date":"2024-10-18T21:21:17","date_gmt":"2024-10-18T13:21:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/91454\/"},"modified":"2024-10-18T21:21:18","modified_gmt":"2024-10-18T13:21:18","slug":"ora-30930-%e4%bd%bf%e7%94%a8-connect_by_iscycle-%e5%81%bd%e5%88%97%e6%99%82%e9%9c%80%e8%a6%81-nocycle-%e9%97%9c%e9%8d%b5%e5%ad%97-oracle-%e5%a0%b1%e9%8c%af-%e6%95%85%e9%9a%9c%e4%bf%ae%e5%be%a9","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/91454\/","title":{"rendered":"ORA-30930: \u4f7f\u7528 CONNECT_BY_ISCYCLE \u507d\u5217\u6642\u9700\u8981 NOCYCLE \u95dc\u9375\u5b57 ORACLE \u5831\u932f \u6545\u969c\u4fee\u5fa9 \u9060\u7a0b\u8655\u7406"},"content":{"rendered":"<h1 id=\"ora-30930-%e4%bd%bf%e7%94%a8-connect_by_iscycle-%e5%81%bd%e5%88%97%e6%99%82%e9%9c%80%e8%a6%81-nocycle-%e9%97%9c%e9%8d%b5%e5%ad%97-oracle-%e5%a0%b1%e9%8c%af-%e6%95%85%e9%9a%9c%e4%bf%ae%e5%be%a9-OavZZLhmpY\">ORA-30930: \u4f7f\u7528 CONNECT_BY_ISCYCLE \u507d\u5217\u6642\u9700\u8981 NOCYCLE \u95dc\u9375\u5b57 ORACLE \u5831\u932f \u6545\u969c\u4fee\u5fa9 \u9060\u7a0b\u8655\u7406<\/h1>\n<p>\u5728\u4f7f\u7528 Oracle \u6578\u64da\u5eab\u9032\u884c\u5c64\u6b21\u67e5\u8a62\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u932f\u8aa4\u4ee3\u78bc <code>ORA-30930<\/code>\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u51fa\u73fe\u5728\u4f7f\u7528 <code>CONNECT BY ISCYCLE<\/code> \u507d\u5217\u6642\uff0c\u537b\u672a\u6b63\u78ba\u4f7f\u7528 <code>NOCYCLE<\/code> \u95dc\u9375\u5b57\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\u3001\u89e3\u6c7a\u65b9\u6848\u4ee5\u53ca\u5982\u4f55\u9032\u884c\u9060\u7a0b\u8655\u7406\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e5%8e%9f%e5%9b%a0-OavZZLhmpY\">\u932f\u8aa4\u539f\u56e0<\/h2>\n<p>\u5728 Oracle \u6578\u64da\u5eab\u4e2d\uff0c\u5c64\u6b21\u67e5\u8a62\u5141\u8a31\u7528\u6236\u4ee5\u6a39\u72c0\u7d50\u69cb\u7684\u65b9\u5f0f\u6aa2\u7d22\u6578\u64da\u3002\u7576\u4f7f\u7528 <code>CONNECT BY<\/code> \u5b50\u53e5\u6642\uff0c\u6578\u64da\u5eab\u6703\u81ea\u52d5\u6aa2\u67e5\u662f\u5426\u5b58\u5728\u5faa\u74b0\u5f15\u7528\u3002\u5982\u679c\u5b58\u5728\u5faa\u74b0\u5f15\u7528\uff0c\u5247\u6703\u5f15\u767c <code>ORA-30930<\/code> \u932f\u8aa4\uff0c\u63d0\u793a\u7528\u6236\u9700\u8981\u4f7f\u7528 <code>NOCYCLE<\/code> \u95dc\u9375\u5b57\u4f86\u907f\u514d\u7121\u9650\u5faa\u74b0\u3002<\/p>\n<p>\u5177\u9ad4\u4f86\u8aaa\uff0c\u7576\u67e5\u8a62\u4e2d\u5305\u542b <code>CONNECT BY ISCYCLE<\/code> \u6642\uff0cOracle \u9700\u8981\u78ba\u4fdd\u67e5\u8a62\u4e0d\u6703\u56e0\u5faa\u74b0\u800c\u7121\u9650\u57f7\u884c\u3002\u82e5\u672a\u4f7f\u7528 <code>NOCYCLE<\/code>\uff0c\u5247\u6703\u5c0e\u81f4\u8a72\u932f\u8aa4\u7684\u767c\u751f\u3002<\/p>\n<h2 id=\"%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-OavZZLhmpY\">\u89e3\u6c7a\u65b9\u6848<\/h2>\n<p>\u8981\u4fee\u5fa9 <code>ORA-30930<\/code> \u932f\u8aa4\uff0c\u958b\u767c\u8005\u9700\u8981\u5728 SQL \u67e5\u8a62\u4e2d\u6dfb\u52a0 <code>NOCYCLE<\/code> \u95dc\u9375\u5b57\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre><code>\nSELECT employee_id, manager_id, LEVEL,\n       CONNECT_BY_ISCYCLE AS is_cycle\nFROM employees\nSTART WITH employee_id = 1\nCONNECT BY NOCYCLE PRIOR employee_id = manager_id;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c<code>NOCYCLE<\/code> \u95dc\u9375\u5b57\u7684\u4f7f\u7528\u544a\u8a34 Oracle \u5728\u9047\u5230\u5faa\u74b0\u6642\u61c9\u8a72\u505c\u6b62\uff0c\u800c\u4e0d\u662f\u5f15\u767c\u932f\u8aa4\u3002\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u907f\u514d <code>ORA-30930<\/code> \u932f\u8aa4\u7684\u767c\u751f\u3002<\/p>\n<h2 id=\"%e9%81%a0%e7%a8%8b%e8%99%95%e7%90%86-OavZZLhmpY\">\u9060\u7a0b\u8655\u7406<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u958b\u767c\u8005\u53ef\u80fd\u7121\u6cd5\u76f4\u63a5\u8a2a\u554f\u6578\u64da\u5eab\u9032\u884c\u4fee\u6539\u3002\u9019\u6642\uff0c\u9060\u7a0b\u8655\u7406\u6210\u70ba\u4e00\u500b\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u9060\u7a0b\u8655\u7406\u7684\u6b65\u9a5f\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u9060\u7a0b\u684c\u9762\u5de5\u5177\uff1a<\/strong>\u901a\u904e\u9060\u7a0b\u684c\u9762\u9023\u63a5\u5230\u6578\u64da\u5eab\u6240\u5728\u7684\u4f3a\u670d\u5668\uff0c\u7136\u5f8c\u9032\u884c\u5fc5\u8981\u7684\u67e5\u8a62\u4fee\u6539\u3002<\/li>\n<li><strong>\u4f7f\u7528 SQL \u5ba2\u6236\u7aef\uff1a<\/strong>\u5982\u679c\u6709\u9069\u7576\u7684\u6b0a\u9650\uff0c\u53ef\u4ee5\u4f7f\u7528 SQL \u5ba2\u6236\u7aef\u5de5\u5177\uff08\u5982 SQL Developer \u6216 Toad\uff09\u4f86\u57f7\u884c\u4fee\u6539\u904e\u7684\u67e5\u8a62\u3002<\/li>\n<li><strong>\u8acb\u6c42 DBA \u5354\u52a9\uff1a<\/strong>\u5982\u679c\u7121\u6cd5\u81ea\u884c\u89e3\u6c7a\uff0c\u53ef\u4ee5\u8acb\u6c42\u6578\u64da\u5eab\u7ba1\u7406\u54e1\uff08DBA\uff09\u5354\u52a9\u9032\u884c\u67e5\u8a62\u7684\u4fee\u6539\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-OavZZLhmpY\">\u7e3d\u7d50<\/h2>\n<p>\u5728 Oracle \u6578\u64da\u5eab\u4e2d\uff0c<code>ORA-30930<\/code> \u932f\u8aa4\u901a\u5e38\u662f\u7531\u65bc\u672a\u6b63\u78ba\u4f7f\u7528 <code>NOCYCLE<\/code> \u95dc\u9375\u5b57\u800c\u5f15\u8d77\u7684\u3002\u901a\u904e\u5728\u67e5\u8a62\u4e2d\u6dfb\u52a0 <code>NOCYCLE<\/code>\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u907f\u514d\u6b64\u932f\u8aa4\u7684\u767c\u751f\u3002\u6b64\u5916\uff0c\u9060\u7a0b\u8655\u7406\u65b9\u6cd5\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u5728\u7121\u6cd5\u76f4\u63a5\u8a2a\u554f\u6578\u64da\u5eab\u7684\u60c5\u6cc1\u4e0b\u9032\u884c\u6545\u969c\u4fee\u5fa9\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\u5c07\u662f\u660e\u667a\u4e4b\u8209\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u6c7a ORA-30930 \u932f\u8aa4\uff0c\u4f7f\u7528 CONNECT_BY_ISCYCLE \u507d\u5217\u6642\u9700\u6dfb\u52a0 NOCYCLE \u95dc\u9375\u5b57\uff0c\u63d0\u4f9b\u6545\u969c\u4fee\u5fa9\u8207\u9060\u7a0b\u8655\u7406\u6307\u5357\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-91454","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/91454","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=91454"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/91454\/revisions"}],"predecessor-version":[{"id":91455,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/91454\/revisions\/91455"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=91454"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=91454"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=91454"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}