{"id":92004,"date":"2024-10-19T01:59:19","date_gmt":"2024-10-18T17:59:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/92004\/"},"modified":"2024-10-19T01:59:20","modified_gmt":"2024-10-18T17:59:20","slug":"ora-38434-%e7%84%a1%e6%b3%95%e8%a9%95%e4%bc%b0%e8%a1%a8%e9%81%94%e5%bc%8f-string-oracle-%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\/92004\/","title":{"rendered":"ORA-38434: \u7121\u6cd5\u8a55\u4f30\u8868\u9054\u5f0f \u201cstring\u201d ORACLE \u5831\u932f \u6545\u969c\u4fee\u5fa9 \u9060\u7a0b\u8655\u7406"},"content":{"rendered":"<h1 id=\"ora-38434-%e7%84%a1%e6%b3%95%e8%a9%95%e4%bc%b0%e8%a1%a8%e9%81%94%e5%bc%8f-string-oracle-%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-kHyaHFGywg\">ORA-38434: \u7121\u6cd5\u8a55\u4f30\u8868\u9054\u5f0f \u201cstring\u201d ORACLE \u5831\u932f \u6545\u969c\u4fee\u5fa9 \u9060\u7a0b\u8655\u7406<\/h1>\n<p>\u5728\u4f7f\u7528 Oracle \u6578\u64da\u5eab\u7684\u904e\u7a0b\u4e2d\uff0c\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u4ee3\u78bc\uff0c\u5176\u4e2d\u4e4b\u4e00\u4fbf\u662f <code>ORA-38434<\/code>\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u8868\u793a\u5728\u8a55\u4f30\u67d0\u500b\u8868\u9054\u5f0f\u6642\u51fa\u73fe\u4e86\u554f\u984c\uff0c\u7279\u5225\u662f\u5728\u4f7f\u7528\u865b\u64ec\u5217\u6216\u89f8\u767c\u5668\u6642\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e <code>ORA-38434<\/code> \u7684\u6210\u56e0\u3001\u5f71\u97ff\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e5%8e%9f%e5%9b%a0-kHyaHFGywg\">\u932f\u8aa4\u539f\u56e0<\/h2>\n<p><code>ORA-38434<\/code> \u932f\u8aa4\u7684\u4e3b\u8981\u539f\u56e0\u901a\u5e38\u8207\u4ee5\u4e0b\u5e7e\u500b\u65b9\u9762\u6709\u95dc\uff1a<\/p>\n<ul>\n<li><strong>\u865b\u64ec\u5217\u7684\u5b9a\u7fa9\u932f\u8aa4\uff1a<\/strong>\u7576\u865b\u64ec\u5217\u7684\u8868\u9054\u5f0f\u4e0d\u6b63\u78ba\u6216\u7121\u6cd5\u88ab\u8a55\u4f30\u6642\uff0c\u6703\u5c0e\u81f4\u6b64\u932f\u8aa4\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e86\u4e0d\u6b63\u78ba\u7684\u6578\u64da\u985e\u578b\u6216\u51fd\u6578\u3002<\/li>\n<li><strong>\u89f8\u767c\u5668\u4e2d\u7684\u908f\u8f2f\u932f\u8aa4\uff1a<\/strong>\u5982\u679c\u5728\u89f8\u767c\u5668\u4e2d\u4f7f\u7528\u4e86\u4e0d\u6b63\u78ba\u7684\u908f\u8f2f\u6216\u8868\u9054\u5f0f\uff0c\u5247\u53ef\u80fd\u6703\u5f15\u767c\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\uff1a<\/strong>\u5728\u9032\u884c\u6578\u64da\u64cd\u4f5c\u6642\uff0c\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\u4e5f\u53ef\u80fd\u5c0e\u81f4\u8a55\u4f30\u5931\u6557\u3002<\/li>\n<\/ul>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e5%bd%b1%e9%9f%bf-kHyaHFGywg\">\u932f\u8aa4\u5f71\u97ff<\/h2>\n<p>\u7576 <code>ORA-38434<\/code> \u932f\u8aa4\u767c\u751f\u6642\uff0c\u5c07\u6703\u5f71\u97ff\u5230\u6578\u64da\u5eab\u7684\u6b63\u5e38\u904b\u884c\u3002\u5177\u9ad4\u5f71\u97ff\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u7121\u6cd5\u63d2\u5165\u6216\u66f4\u65b0\u6578\u64da\uff0c\u5c0e\u81f4\u696d\u52d9\u6d41\u7a0b\u4e2d\u65b7\u3002<\/li>\n<li>\u5f71\u97ff\u5831\u544a\u751f\u6210\uff0c\u56e0\u70ba\u67d0\u4e9b\u6578\u64da\u53ef\u80fd\u7121\u6cd5\u88ab\u6b63\u78ba\u8a08\u7b97\u3002<\/li>\n<li>\u589e\u52a0\u4e86\u7dad\u8b77\u6210\u672c\uff0c\u56e0\u70ba\u9700\u8981\u82b1\u8cbb\u6642\u9593\u4f86\u6392\u67e5\u548c\u4fee\u5fa9\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%95%85%e9%9a%9c%e4%bf%ae%e5%be%a9%e6%ad%a5%e9%a9%9f-kHyaHFGywg\">\u6545\u969c\u4fee\u5fa9\u6b65\u9a5f<\/h2>\n<p>\u8981\u4fee\u5fa9 <code>ORA-38434<\/code> \u932f\u8aa4\uff0c\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9a5f\u9032\u884c\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e8%99%9b%e6%93%ac%e5%88%97%e5%ae%9a%e7%be%a9-kHyaHFGywg\">1. \u6aa2\u67e5\u865b\u64ec\u5217\u5b9a\u7fa9<\/h3>\n<p>\u9996\u5148\uff0c\u6aa2\u67e5\u51fa\u73fe\u932f\u8aa4\u7684\u865b\u64ec\u5217\u5b9a\u7fa9\u3002\u78ba\u4fdd\u8868\u9054\u5f0f\u6b63\u78ba\u4e14\u80fd\u5920\u88ab\u8a55\u4f30\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>CREATE TABLE example_table (\n    id NUMBER,\n    value NUMBER,\n    virtual_column AS (value * 2) -- \u78ba\u4fdd\u9019\u88e1\u7684\u8868\u9054\u5f0f\u6b63\u78ba\n);<\/code><\/pre>\n<h3 id=\"2-%e6%aa%a2%e6%9f%a5%e8%a7%b8%e7%99%bc%e5%99%a8%e9%82%8f%e8%bc%af-kHyaHFGywg\">2. \u6aa2\u67e5\u89f8\u767c\u5668\u908f\u8f2f<\/h3>\n<p>\u5982\u679c\u932f\u8aa4\u767c\u751f\u5728\u89f8\u767c\u5668\u4e2d\uff0c\u6aa2\u67e5\u89f8\u767c\u5668\u7684\u908f\u8f2f\u662f\u5426\u6b63\u78ba\u3002\u78ba\u4fdd\u6240\u6709\u4f7f\u7528\u7684\u5217\u548c\u8868\u90fd\u5b58\u5728\u4e14\u6b63\u78ba\u3002<\/p>\n<pre><code>CREATE OR REPLACE TRIGGER example_trigger\nBEFORE INSERT ON example_table\nFOR EACH ROW\nBEGIN\n    :new.value := :new.value + 1; -- \u78ba\u4fdd\u9019\u88e1\u7684\u908f\u8f2f\u6b63\u78ba\nEND;<\/code><\/pre>\n<h3 id=\"3-%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e6%aa%a2%e6%9f%a5-kHyaHFGywg\">3. \u6578\u64da\u985e\u578b\u6aa2\u67e5<\/h3>\n<p>\u6aa2\u67e5\u6240\u6709\u6d89\u53ca\u7684\u6578\u64da\u985e\u578b\uff0c\u78ba\u4fdd\u5b83\u5011\u4e4b\u9593\u7684\u517c\u5bb9\u6027\u3002\u4f8b\u5982\uff0c\u907f\u514d\u5c07\u5b57\u7b26\u4e32\u8207\u6578\u5b57\u9032\u884c\u4e0d\u7576\u7684\u904b\u7b97\u3002<\/p>\n<h3 id=\"4-%e6%b8%ac%e8%a9%a6%e5%92%8c%e9%a9%97%e8%ad%89-kHyaHFGywg\">4. \u6e2c\u8a66\u548c\u9a57\u8b49<\/h3>\n<p>\u5728\u9032\u884c\u4fee\u6539\u5f8c\uff0c\u9032\u884c\u6e2c\u8a66\u4ee5\u78ba\u4fdd\u554f\u984c\u5df2\u7d93\u89e3\u6c7a\u3002\u53ef\u4ee5\u4f7f\u7528 <code>SELECT<\/code> \u8a9e\u53e5\u4f86\u9a57\u8b49\u865b\u64ec\u5217\u6216\u89f8\u767c\u5668\u7684\u884c\u70ba\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-kHyaHFGywg\">\u7d50\u8ad6<\/h2>\n<p>\u7e3d\u7d50\u4f86\u8aaa\uff0c<code>ORA-38434<\/code> \u932f\u8aa4\u901a\u5e38\u662f\u7531\u65bc\u865b\u64ec\u5217\u6216\u89f8\u767c\u5668\u4e2d\u7684\u8868\u9054\u5f0f\u7121\u6cd5\u88ab\u8a55\u4f30\u6240\u5f15\u8d77\u7684\u3002\u901a\u904e\u4ed4\u7d30\u6aa2\u67e5\u865b\u64ec\u5217\u5b9a\u7fa9\u3001\u89f8\u767c\u5668\u908f\u8f2f\u548c\u6578\u64da\u985e\u578b\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u6b64\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u904b\u884c\u7684\u6578\u64da\u5eab\u74b0\u5883\uff0c\u53ca\u6642\u8655\u7406\u9019\u985e\u932f\u8aa4\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<p>\u5982\u9700\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u65b9\u6848\u4ee5\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u904b\u884c\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u6c7a ORA-38434 \u932f\u8aa4\uff0c\u7121\u6cd5\u8a55\u4f30\u8868\u9054\u5f0f &#8220;string&#8221; \u7684\u554f\u984c\uff0c\u63d0\u4f9b\u6545\u969c\u4fee\u5fa9\u548c\u9060\u7a0b\u8655\u7406\u65b9\u6848\uff0c\u52a9\u60a8\u5feb\u901f\u6062\u5fa9\u7cfb\u7d71\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-92004","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/92004","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=92004"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/92004\/revisions"}],"predecessor-version":[{"id":92005,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/92004\/revisions\/92005"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=92004"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=92004"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=92004"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}