{"id":92428,"date":"2024-10-19T05:31:17","date_gmt":"2024-10-18T21:31:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/92428\/"},"modified":"2024-10-19T05:31:18","modified_gmt":"2024-10-18T21:31:18","slug":"ora-39820-%e5%9c%a8%e5%88%97-string-%e8%a1%8c%e5%ad%97%e7%ac%a6%e4%b8%b2%e4%b8%ad%e6%aa%a2%e6%b8%ac%e5%88%b0%e9%9b%b6%e9%95%b7%e5%ba%a6-long-%e9%83%a8%e4%bb%b6%e3%80%82-oracle-%e5%a0%b1%e9%8c%af","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/92428\/","title":{"rendered":"ORA-39820: \u5728\u5217 string \u884c\u5b57\u7b26\u4e32\u4e2d\u6aa2\u6e2c\u5230\u96f6\u9577\u5ea6 LONG \u90e8\u4ef6\u3002 ORACLE \u5831\u932f \u6545\u969c\u4fee\u5fa9 \u9060\u7a0b\u8655\u7406"},"content":{"rendered":"<h1 id=\"ora-39820-%e5%9c%a8%e5%88%97-string-%e8%a1%8c%e5%ad%97%e7%ac%a6%e4%b8%b2%e4%b8%ad%e6%aa%a2%e6%b8%ac%e5%88%b0%e9%9b%b6%e9%95%b7%e5%ba%a6-long-%e9%83%a8%e4%bb%b6%e7%9a%84%e6%95%85%e9%9a%9c%e4%bf%ae-UzrFQgLoyO\">ORA-39820: \u5728\u5217 string \u884c\u5b57\u7b26\u4e32\u4e2d\u6aa2\u6e2c\u5230\u96f6\u9577\u5ea6 LONG \u90e8\u4ef6\u7684\u6545\u969c\u4fee\u5fa9\u8207\u9060\u7a0b\u8655\u7406<\/h1>\n<p>\u5728\u4f7f\u7528Oracle\u6578\u64da\u5eab\u6642\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\u662fORA-39820\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u51fa\u73fe\u5728\u8655\u7406LONG\u6578\u64da\u985e\u578b\u6642\uff0c\u7279\u5225\u662f\u5728\u57f7\u884c\u67e5\u8a62\u6216\u6578\u64da\u63d2\u5165\u64cd\u4f5c\u6642\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eORA-39820\u7684\u6210\u56e0\u3001\u5f71\u97ff\u4ee5\u53ca\u5982\u4f55\u9032\u884c\u6545\u969c\u4fee\u5fa9\u548c\u9060\u7a0b\u8655\u7406\u3002<\/p>\n<h2 id=\"ora-39820%e7%9a%84%e6%88%90%e5%9b%a0-UzrFQgLoyO\">ORA-39820\u7684\u6210\u56e0<\/h2>\n<p>ORA-39820\u932f\u8aa4\u7684\u4e3b\u8981\u539f\u56e0\u662f\u6578\u64da\u5eab\u5728\u8655\u7406LONG\u985e\u578b\u7684\u6578\u64da\u6642\uff0c\u6aa2\u6e2c\u5230\u96f6\u9577\u5ea6\u7684LONG\u90e8\u4ef6\u3002LONG\u6578\u64da\u985e\u578b\u7528\u65bc\u5b58\u5132\u5927\u91cf\u6587\u672c\u6216\u4e8c\u9032\u5236\u6578\u64da\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u9019\u4e9b\u6578\u64da\u53ef\u80fd\u6703\u51fa\u73fe\u4e0d\u5b8c\u6574\u6216\u640d\u58de\u7684\u60c5\u6cc1\uff0c\u5c0e\u81f4\u932f\u8aa4\u7684\u767c\u751f\u3002<\/p>\n<ul>\n<li><strong>\u6578\u64da\u640d\u58de\uff1a<\/strong>\u5982\u679cLONG\u6578\u64da\u5728\u5b58\u5132\u904e\u7a0b\u4e2d\u906d\u5230\u640d\u58de\uff0c\u5247\u5728\u8b80\u53d6\u6642\u53ef\u80fd\u6703\u51fa\u73fe\u96f6\u9577\u5ea6\u7684\u90e8\u4ef6\u3002<\/li>\n<li><strong>\u4e0d\u6b63\u78ba\u7684\u6578\u64da\u63d2\u5165\uff1a<\/strong>\u5728\u63d2\u5165\u6578\u64da\u6642\uff0c\u5982\u679c\u672a\u6b63\u78ba\u8655\u7406LONG\u985e\u578b\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u96f6\u9577\u5ea6\u7684\u90e8\u4ef6\u3002<\/li>\n<li><strong>\u7248\u672c\u4e0d\u517c\u5bb9\uff1a<\/strong>\u4e0d\u540c\u7248\u672c\u7684Oracle\u6578\u64da\u5eab\u5c0dLONG\u6578\u64da\u7684\u8655\u7406\u65b9\u5f0f\u53ef\u80fd\u5b58\u5728\u5dee\u7570\uff0c\u9019\u4e5f\u53ef\u80fd\u5c0e\u81f4\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%bd%b1%e9%9f%bf-UzrFQgLoyO\">\u5f71\u97ff<\/h2>\n<p>ORA-39820\u932f\u8aa4\u6703\u5c0d\u6578\u64da\u5eab\u7684\u6b63\u5e38\u904b\u884c\u9020\u6210\u5f71\u97ff\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u8655\u7406\u5927\u91cf\u6578\u64da\u7684\u61c9\u7528\u4e2d\u3002\u9019\u53ef\u80fd\u5c0e\u81f4\u67e5\u8a62\u5931\u6557\u3001\u6578\u64da\u4e1f\u5931\u6216\u61c9\u7528\u7a0b\u5e8f\u5d29\u6f70\uff0c\u5f9e\u800c\u5f71\u97ff\u696d\u52d9\u904b\u4f5c\u3002<\/p>\n<h2 id=\"%e6%95%85%e9%9a%9c%e4%bf%ae%e5%be%a9%e6%ad%a5%e9%a9%9f-UzrFQgLoyO\">\u6545\u969c\u4fee\u5fa9\u6b65\u9a5f<\/h2>\n<p>\u7576\u9047\u5230ORA-39820\u932f\u8aa4\u6642\uff0c\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9a5f\u9032\u884c\u6545\u969c\u4fee\u5fa9\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e6%95%b8%e6%93%9a%e5%ae%8c%e6%95%b4%e6%80%a7-UzrFQgLoyO\">1. \u6aa2\u67e5\u6578\u64da\u5b8c\u6574\u6027<\/h3>\n<p>\u9996\u5148\uff0c\u6aa2\u67e5LONG\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u67e5\u8a62\u4f86\u6aa2\u67e5\u6578\u64da\u8868\u4e2d\u7684LONG\u5217\uff1a<\/p>\n<pre><code>SELECT LENGTH(long_column) FROM your_table WHERE long_column IS NOT NULL;<\/code><\/pre>\n<p>\u9019\u5c07\u5e6b\u52a9\u60a8\u8b58\u5225\u662f\u5426\u5b58\u5728\u96f6\u9577\u5ea6\u7684LONG\u90e8\u4ef6\u3002<\/p>\n<h3 id=\"2-%e4%bf%ae%e5%be%a9%e6%90%8d%e5%a3%9e%e7%9a%84%e6%95%b8%e6%93%9a-UzrFQgLoyO\">2. \u4fee\u5fa9\u640d\u58de\u7684\u6578\u64da<\/h3>\n<p>\u5982\u679c\u767c\u73fe\u6578\u64da\u640d\u58de\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u9032\u884c\u4fee\u5fa9\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528DBMS_LOB\u5305\u4f86\u91cd\u65b0\u5beb\u5165LONG\u6578\u64da\u3002<\/li>\n<li>\u5c07LONG\u6578\u64da\u8f49\u63db\u70baCLOB\u985e\u578b\uff0c\u56e0\u70baCLOB\u5c0d\u65bc\u5927\u6587\u672c\u6578\u64da\u7684\u8655\u7406\u66f4\u70ba\u7a69\u5b9a\u3002<\/li>\n<\/ul>\n<h3 id=\"3-%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a%e5%ba%ab%e7%89%88%e6%9c%ac-UzrFQgLoyO\">3. \u66f4\u65b0\u6578\u64da\u5eab\u7248\u672c<\/h3>\n<p>\u5982\u679c\u60a8\u4f7f\u7528\u7684Oracle\u7248\u672c\u8f03\u820a\uff0c\u5efa\u8b70\u8003\u616e\u5347\u7d1a\u5230\u6700\u65b0\u7248\u672c\uff0c\u4ee5\u7372\u5f97\u66f4\u597d\u7684LONG\u6578\u64da\u652f\u6301\u548c\u932f\u8aa4\u4fee\u5fa9\u3002<\/p>\n<h2 id=\"%e9%81%a0%e7%a8%8b%e8%99%95%e7%90%86-UzrFQgLoyO\">\u9060\u7a0b\u8655\u7406<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u60a8\u53ef\u80fd\u7121\u6cd5\u76f4\u63a5\u8a2a\u554f\u6578\u64da\u5eab\u9032\u884c\u6545\u969c\u4fee\u5fa9\u3002\u9019\u6642\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u9060\u7a0b\u8655\u7406\u5de5\u5177\u4f86\u89e3\u6c7a\u554f\u984c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u9060\u7a0b\u8655\u7406\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528Oracle SQL Developer\uff1a<\/strong>\u9019\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u60a8\u9060\u7a0b\u9023\u63a5\u5230\u6578\u64da\u5eab\u4e26\u57f7\u884c\u67e5\u8a62\u548c\u4fee\u5fa9\u64cd\u4f5c\u3002<\/li>\n<li><strong>\u4f7f\u7528PL\/SQL\u8173\u672c\uff1a<\/strong>\u7de8\u5bebPL\/SQL\u8173\u672c\u4f86\u81ea\u52d5\u6aa2\u67e5\u548c\u4fee\u5fa9LONG\u6578\u64da\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-UzrFQgLoyO\">\u7e3d\u7d50<\/h2>\n<p>ORA-39820\u932f\u8aa4\u5728Oracle\u6578\u64da\u5eab\u4e2d\u4e26\u4e0d\u7f55\u898b\uff0c\u4e86\u89e3\u5176\u6210\u56e0\u548c\u4fee\u5fa9\u65b9\u6cd5\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u6aa2\u67e5\u6578\u64da\u5b8c\u6574\u6027\u3001\u4fee\u5fa9\u640d\u58de\u7684\u6578\u64da\u4ee5\u53ca\u8003\u616e\u5347\u7d1a\u6578\u64da\u5eab\u7248\u672c\uff0c\u60a8\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u6b64\u554f\u984c\u3002\u6b64\u5916\uff0c\u5229\u7528\u9060\u7a0b\u8655\u7406\u5de5\u5177\u53ef\u4ee5\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\u6578\u64da\u5eab\u904b\u884c\u7684\u4f01\u696d\uff0c\u9078\u64c7\u5408\u9069\u7684<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a>\u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u6c7a ORA-39820 \u932f\u8aa4\uff0c\u6aa2\u6e2c\u5230\u96f6\u9577\u5ea6 LONG \u90e8\u4ef6\u7684\u554f\u984c\uff0c\u63d0\u4f9b\u6545\u969c\u4fee\u5fa9\u548c\u9060\u7a0b\u8655\u7406\u65b9\u6848\uff0c\u78ba\u4fdd Oracle \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-92428","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/92428","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=92428"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/92428\/revisions"}],"predecessor-version":[{"id":92429,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/92428\/revisions\/92429"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=92428"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=92428"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=92428"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}