{"id":178754,"date":"2024-11-08T20:37:19","date_gmt":"2024-11-08T12:37:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/178754\/"},"modified":"2024-11-08T20:37:21","modified_gmt":"2024-11-08T12:37:21","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9postgresql%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc%ef%bc%9a22026-string_data_length_mismatch%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/178754\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a22026 &#8211; string_data_length_mismatch\uff1f"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9postgresql%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc%ef%bc%9a22026-string_data_length_mismatch-MnVAynKPLV\">\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a22026 &#8211; string_data_length_mismatch<\/h1>\n<p>\u5728\u4f7f\u7528PostgreSQL\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u4ee3\u78bc\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u932f\u8aa4\u4ee3\u78bc22026\uff0c\u9019\u500b\u932f\u8aa4\u901a\u5e38\u8868\u793a\u5b57\u7b26\u4e32\u6578\u64da\u9577\u5ea6\u4e0d\u5339\u914d\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\u3001\u5f71\u97ff\u4ee5\u53ca\u5982\u4f55\u6709\u6548\u5730\u4fee\u5fa9\u5b83\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc22026%e7%9a%84%e5%8e%9f%e5%9b%a0-MnVAynKPLV\">\u932f\u8aa4\u4ee3\u78bc22026\u7684\u539f\u56e0<\/h2>\n<p>PostgreSQL\u7684\u932f\u8aa4\u4ee3\u78bc22026\u901a\u5e38\u51fa\u73fe\u5728\u5617\u8a66\u5c07\u4e00\u500b\u5b57\u7b26\u4e32\u63d2\u5165\u5230\u4e00\u500b\u5217\u4e2d\uff0c\u4f46\u8a72\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\u8d85\u904e\u4e86\u8a72\u5217\u7684\u5b9a\u7fa9\u9577\u5ea6\u3002\u9019\u7a2e\u60c5\u6cc1\u901a\u5e38\u767c\u751f\u5728\u4ee5\u4e0b\u5e7e\u7a2e\u60c5\u6cc1\u4e0b\uff1a<\/p>\n<ul>\n<li><strong>\u5217\u5b9a\u7fa9\u4e0d\u6b63\u78ba\uff1a<\/strong>\u5982\u679c\u5728\u5275\u5efa\u8868\u6642\uff0c\u5c0d\u67d0\u500b\u5217\u7684\u9577\u5ea6\u5b9a\u7fa9\u4e0d\u5920\uff0c\u5247\u5728\u63d2\u5165\u6578\u64da\u6642\u53ef\u80fd\u6703\u51fa\u73fe\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\uff1a<\/strong>\u7576\u63d2\u5165\u7684\u6578\u64da\u985e\u578b\u8207\u5217\u7684\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\u6642\uff0c\u4e5f\u53ef\u80fd\u5c0e\u81f4\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u6578\u64da\u6e05\u7406\u4e0d\u8db3\uff1a<\/strong>\u5728\u5c07\u6578\u64da\u63d2\u5165\u6578\u64da\u5eab\u4e4b\u524d\uff0c\u5982\u679c\u6c92\u6709\u5c0d\u6578\u64da\u9032\u884c\u9069\u7576\u7684\u6e05\u7406\u548c\u9a57\u8b49\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u9577\u5ea6\u4e0d\u5339\u914d\u7684\u554f\u984c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc22026-MnVAynKPLV\">\u5982\u4f55\u4fee\u5fa9\u932f\u8aa4\u4ee3\u78bc22026<\/h2>\n<p>\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc22026\u7684\u904e\u7a0b\u901a\u5e38\u6d89\u53ca\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e8%a1%a8%e7%b5%90%e6%a7%8b-MnVAynKPLV\">1. \u6aa2\u67e5\u8868\u7d50\u69cb<\/h3>\n<p>\u9996\u5148\uff0c\u60a8\u9700\u8981\u6aa2\u67e5\u5c0e\u81f4\u932f\u8aa4\u7684\u8868\u7684\u7d50\u69cb\u3002\u4f7f\u7528\u4ee5\u4e0bSQL\u67e5\u8a62\u4f86\u67e5\u770b\u8868\u7684\u5b9a\u7fa9\uff1a<\/p>\n<pre><code>SELECT column_name, character_maximum_length \nFROM information_schema.columns \nWHERE table_name = 'your_table_name';<\/code><\/pre>\n<p>\u9019\u5c07\u986f\u793a\u8868\u4e2d\u6bcf\u500b\u5217\u7684\u540d\u7a31\u53ca\u5176\u6700\u5927\u5b57\u7b26\u9577\u5ea6\u3002\u78ba\u4fdd\u60a8\u8981\u63d2\u5165\u7684\u5b57\u7b26\u4e32\u4e0d\u8d85\u904e\u9019\u4e9b\u9650\u5236\u3002<\/p>\n<h3 id=\"2-%e8%aa%bf%e6%95%b4%e5%88%97%e7%9a%84%e9%95%b7%e5%ba%a6-MnVAynKPLV\">2. \u8abf\u6574\u5217\u7684\u9577\u5ea6<\/h3>\n<p>\u5982\u679c\u767c\u73fe\u67d0\u500b\u5217\u7684\u9577\u5ea6\u5b9a\u7fa9\u4e0d\u5920\uff0c\u53ef\u4ee5\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u4f86\u8abf\u6574\u5217\u7684\u9577\u5ea6\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>ALTER TABLE your_table_name \nALTER COLUMN your_column_name TYPE VARCHAR(new_length);<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u5c07\u8a72\u5217\u7684\u6700\u5927\u9577\u5ea6\u589e\u52a0\u5230\u6240\u9700\u7684\u503c\u3002<\/p>\n<h3 id=\"3-%e6%95%b8%e6%93%9a%e9%a9%97%e8%ad%89%e5%92%8c%e6%b8%85%e7%90%86-MnVAynKPLV\">3. \u6578\u64da\u9a57\u8b49\u548c\u6e05\u7406<\/h3>\n<p>\u5728\u5c07\u6578\u64da\u63d2\u5165\u6578\u64da\u5eab\u4e4b\u524d\uff0c\u9032\u884c\u6578\u64da\u9a57\u8b49\u548c\u6e05\u7406\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u7de8\u7a0b\u8a9e\u8a00\u4e2d\u7684\u5b57\u7b26\u4e32\u8655\u7406\u51fd\u6578\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u9577\u5ea6\u7b26\u5408\u8981\u6c42\u3002\u4f8b\u5982\uff0c\u5728Python\u4e2d\uff0c\u60a8\u53ef\u4ee5\u9019\u6a23\u505a\uff1a<\/p>\n<pre><code>if len(your_string) &gt; max_length:\n    your_string = your_string[:max_length]<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5728\u63d2\u5165\u6578\u64da\u4e4b\u524d\uff0c\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\u4e0d\u6703\u8d85\u904e\u6700\u5927\u9650\u5236\u3002<\/p>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8%e4%be%8b%e5%a4%96%e8%99%95%e7%90%86-MnVAynKPLV\">4. \u4f7f\u7528\u4f8b\u5916\u8655\u7406<\/h3>\n<p>\u5728\u61c9\u7528\u7a0b\u5e8f\u4e2d\uff0c\u4f7f\u7528\u4f8b\u5916\u8655\u7406\u4f86\u6355\u7372\u548c\u8655\u7406\u6b64\u985e\u932f\u8aa4\u4e5f\u662f\u4e00\u500b\u597d\u4e3b\u610f\u3002\u9019\u6a23\u53ef\u4ee5\u5728\u767c\u751f\u932f\u8aa4\u6642\u63d0\u4f9b\u66f4\u53cb\u597d\u7684\u932f\u8aa4\u6d88\u606f\uff0c\u4e26\u9632\u6b62\u61c9\u7528\u7a0b\u5e8f\u5d29\u6f70\u3002<\/p>\n<pre><code>try:\n    # \u63d2\u5165\u6578\u64da\u7684\u4ee3\u78bc\nexcept psycopg2.DataError as e:\n    print(\"\u6578\u64da\u932f\u8aa4\uff1a\", e)<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-MnVAynKPLV\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL\u932f\u8aa4\u4ee3\u78bc22026 &#8211; string_data_length_mismatch\u662f\u4e00\u500b\u5e38\u898b\u7684\u932f\u8aa4\uff0c\u901a\u5e38\u7531\u65bc\u5b57\u7b26\u4e32\u9577\u5ea6\u4e0d\u5339\u914d\u5f15\u8d77\u3002\u901a\u904e\u6aa2\u67e5\u8868\u7d50\u69cb\u3001\u8abf\u6574\u5217\u7684\u9577\u5ea6\u3001\u9032\u884c\u6578\u64da\u9a57\u8b49\u548c\u6e05\u7406\uff0c\u4ee5\u53ca\u4f7f\u7528\u4f8b\u5916\u8655\u7406\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u6b64\u932f\u8aa4\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u6216 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u5b89\u5168\u548c\u53ef\u9760\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc22026\uff1astring_data_length_mismatch\uff0c\u78ba\u4fdd\u6578\u64da\u985e\u578b\u548c\u9577\u5ea6\u5339\u914d\u4ee5\u907f\u514d\u932f\u8aa4\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-178754","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178754","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=178754"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178754\/revisions"}],"predecessor-version":[{"id":178755,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178754\/revisions\/178755"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=178754"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=178754"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=178754"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}