{"id":179172,"date":"2024-11-08T23:36:18","date_gmt":"2024-11-08T15:36:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/179172\/"},"modified":"2024-11-08T23:36:19","modified_gmt":"2024-11-08T15:36:19","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9-postgresql-%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc%ef%bc%9ahv090-fdw_invalid_string_length_or_buffer_length%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/179172\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1aHV090 &#8211; fdw_invalid_string_length_or_buffer_length\uff1f"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9-postgresql-%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc%ef%bc%9ahv090-fdw_invalid_string_length_or_buffer_length%ef%bc%9f-zOzQEYzFHf\">\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1aHV090 &#8211; fdw_invalid_string_length_or_buffer_length\uff1f<\/h1>\n<p>\u5728\u4f7f\u7528 PostgreSQL \u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u4ee3\u78bc\uff0c\u5176\u4e2d\u4e4b\u4e00\u662f HV090\uff0c\u9019\u662f\u4e00\u500b\u8207\u5916\u90e8\u6578\u64da\u5305\uff08Foreign Data Wrapper, FDW\uff09\u76f8\u95dc\u7684\u932f\u8aa4\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u8868\u793a\u5728\u8655\u7406\u5b57\u7b26\u4e32\u9577\u5ea6\u6216\u7de9\u885d\u5340\u9577\u5ea6\u6642\u51fa\u73fe\u4e86\u554f\u984c\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e HV090 \u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"hv090-%e9%8c%af%e8%aa%a4%e7%9a%84%e5%8e%9f%e5%9b%a0-zOzQEYzFHf\">HV090 \u932f\u8aa4\u7684\u539f\u56e0<\/h2>\n<p>HV090 \u932f\u8aa4\u901a\u5e38\u767c\u751f\u5728\u4f7f\u7528 FDW \u9032\u884c\u8de8\u6578\u64da\u5eab\u67e5\u8a62\u6642\u3002\u9019\u500b\u932f\u8aa4\u7684\u4e3b\u8981\u539f\u56e0\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u5b57\u7b26\u4e32\u9577\u5ea6\u4e0d\u5339\u914d\uff1a<\/strong>\u7576\u5f9e\u5916\u90e8\u6578\u64da\u6e90\u8b80\u53d6\u5b57\u7b26\u4e32\u6642\uff0c\u5982\u679c\u5b57\u7b26\u4e32\u7684\u5be6\u969b\u9577\u5ea6\u8d85\u904e\u4e86 PostgreSQL \u4e2d\u5b9a\u7fa9\u7684\u9577\u5ea6\uff0c\u5247\u6703\u5c0e\u81f4\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u7de9\u885d\u5340\u9577\u5ea6\u4e0d\u6b63\u78ba\uff1a<\/strong>\u5728\u8655\u7406\u6578\u64da\u6642\uff0c\u5982\u679c\u7de9\u885d\u5340\u7684\u5927\u5c0f\u4e0d\u8db3\u4ee5\u5bb9\u7d0d\u5f9e\u5916\u90e8\u6578\u64da\u6e90\u8b80\u53d6\u7684\u6578\u64da\uff0c\u4e5f\u6703\u5f15\u767c\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\uff1a<\/strong>\u5982\u679c\u5916\u90e8\u6578\u64da\u6e90\u4e2d\u7684\u6578\u64da\u985e\u578b\u8207 PostgreSQL \u4e2d\u7684\u6578\u64da\u985e\u578b\u4e0d\u4e00\u81f4\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u8f49\u63db\u5931\u6557\uff0c\u5f9e\u800c\u5f15\u767c HV090 \u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9-hv090-%e9%8c%af%e8%aa%a4-zOzQEYzFHf\">\u5982\u4f55\u4fee\u5fa9 HV090 \u932f\u8aa4<\/h2>\n<p>\u4fee\u5fa9 HV090 \u932f\u8aa4\u9700\u8981\u91dd\u5c0d\u5177\u9ad4\u539f\u56e0\u63a1\u53d6\u76f8\u61c9\u7684\u63aa\u65bd\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u89e3\u6c7a\u65b9\u6848\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%95%b7%e5%ba%a6-zOzQEYzFHf\">1. \u6aa2\u67e5\u5b57\u7b26\u4e32\u9577\u5ea6<\/h3>\n<p>\u9996\u5148\uff0c\u6aa2\u67e5\u5f9e\u5916\u90e8\u6578\u64da\u6e90\u8b80\u53d6\u7684\u5b57\u7b26\u4e32\u9577\u5ea6\u3002\u78ba\u4fdd PostgreSQL \u4e2d\u5b9a\u7fa9\u7684\u5b57\u6bb5\u9577\u5ea6\u8db3\u5920\u5bb9\u7d0d\u5916\u90e8\u6578\u64da\u6e90\u4e2d\u7684\u5b57\u7b26\u4e32\u3002\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b SQL \u67e5\u8a62\u4f86\u6aa2\u67e5\u5b57\u6bb5\u9577\u5ea6\uff1a<\/p>\n<pre><code>SELECT character_maximum_length \nFROM information_schema.columns \nWHERE table_name = 'your_table_name' \nAND column_name = 'your_column_name';<\/code><\/pre>\n<p>\u5982\u679c\u767c\u73fe\u9577\u5ea6\u4e0d\u8db3\uff0c\u53ef\u4ee5\u8003\u616e\u589e\u52a0\u5b57\u6bb5\u7684\u9577\u5ea6\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre><code>ALTER TABLE your_table_name \nALTER COLUMN your_column_name TYPE VARCHAR(new_length);<\/code><\/pre>\n<h3 id=\"2-%e8%aa%bf%e6%95%b4%e7%b7%a9%e8%a1%9d%e5%8d%80%e5%a4%a7%e5%b0%8f-zOzQEYzFHf\">2. \u8abf\u6574\u7de9\u885d\u5340\u5927\u5c0f<\/h3>\n<p>\u5982\u679c\u554f\u984c\u51fa\u5728\u7de9\u885d\u5340\u5927\u5c0f\u4e0a\uff0c\u5247\u9700\u8981\u6aa2\u67e5 FDW \u7684\u914d\u7f6e\u3002\u78ba\u4fdd\u5728\u8a2d\u7f6e FDW \u6642\uff0c\u7de9\u885d\u5340\u7684\u5927\u5c0f\u8db3\u5920\u5927\u4ee5\u5bb9\u7d0d\u6240\u6709\u53ef\u80fd\u7684\u6578\u64da\u3002\u53ef\u4ee5\u901a\u904e\u8abf\u6574 FDW \u7684\u53c3\u6578\u4f86\u5be6\u73fe\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre><code>CREATE SERVER your_server \nFOREIGN DATA WRAPPER your_fdw \nOPTIONS (buffer_size 'new_buffer_size');<\/code><\/pre>\n<h3 id=\"3-%e7%a2%ba%e4%bf%9d%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e4%b8%80%e8%87%b4-zOzQEYzFHf\">3. \u78ba\u4fdd\u6578\u64da\u985e\u578b\u4e00\u81f4<\/h3>\n<p>\u6700\u5f8c\uff0c\u6aa2\u67e5\u5916\u90e8\u6578\u64da\u6e90\u4e2d\u7684\u6578\u64da\u985e\u578b\uff0c\u78ba\u4fdd\u5b83\u5011\u8207 PostgreSQL \u4e2d\u7684\u6578\u64da\u985e\u578b\u4e00\u81f4\u3002\u5982\u679c\u767c\u73fe\u4e0d\u4e00\u81f4\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528 CAST \u51fd\u6578\u9032\u884c\u6578\u64da\u985e\u578b\u8f49\u63db\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT CAST(your_column AS target_data_type) \nFROM your_foreign_table;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-zOzQEYzFHf\">\u7e3d\u7d50<\/h2>\n<p>HV090 \u932f\u8aa4\u901a\u5e38\u8207\u5b57\u7b26\u4e32\u9577\u5ea6\u6216\u7de9\u885d\u5340\u9577\u5ea6\u6709\u95dc\uff0c\u901a\u904e\u6aa2\u67e5\u5b57\u7b26\u4e32\u9577\u5ea6\u3001\u8abf\u6574\u7de9\u885d\u5340\u5927\u5c0f\u4ee5\u53ca\u78ba\u4fdd\u6578\u64da\u985e\u578b\u4e00\u81f4\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u6b64\u932f\u8aa4\u3002\u5c0d\u65bc\u4f7f\u7528 PostgreSQL \u7684\u958b\u767c\u8005\u4f86\u8aaa\uff0c\u4e86\u89e3\u9019\u4e9b\u5e38\u898b\u554f\u984c\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u82e5\u60a8\u9700\u8981\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u6e90\u548c\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc HV090 \u7684\u65b9\u6cd5\uff0c\u89e3\u6c7a fdw_invalid_string_length_or_buffer_length \u554f\u984c\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\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-179172","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179172","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=179172"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179172\/revisions"}],"predecessor-version":[{"id":179173,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179172\/revisions\/179173"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=179172"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=179172"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=179172"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}