{"id":66865,"date":"2024-10-14T21:18:20","date_gmt":"2024-10-14T13:18:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/66865\/"},"modified":"2024-10-14T21:18:20","modified_gmt":"2024-10-14T13:18:20","slug":"mysql-error-number-3952-symbol-er_da_udf_invalid_return_type_to_set_charset-sqlstate-hy000-%e6%8a%a5%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\/66865\/","title":{"rendered":"MySQL Error number: 3952; Symbol: ER_DA_UDF_INVALID_RETURN_TYPE_TO_SET_CHARSET; SQLSTATE: HY000 \u62a5\u932f \u6545\u969c\u4fee\u5fa9 \u9060\u7a0b\u8655\u7406"},"content":{"rendered":"<h1 id=\"mysql-%e9%8c%af%e8%aa%a4%e8%99%9f%e7%a2%bc%ef%bc%9a3952%ef%bc%9b%e7%ac%a6%e8%99%9f%ef%bc%9aer_da_udf_invalid_return_type_to_set_charset%ef%bc%9bsqlstate%ef%bc%9ahy000-%e6%95%85%e9%9a%9c%e4%bf%ae-zyQeHJrIcG\">MySQL \u932f\u8aa4\u865f\u78bc\uff1a3952\uff1b\u7b26\u865f\uff1aER_DA_UDF_INVALID_RETURN_TYPE_TO_SET_CHARSET\uff1bSQLSTATE\uff1aHY000 \u6545\u969c\u4fee\u5fa9 \u9060\u7a0b\u8655\u7406<\/h1>\n<p>\u5728\u4f7f\u7528 MySQL \u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\uff0c\u5176\u4e2d\u4e4b\u4e00\u4fbf\u662f\u932f\u8aa4\u865f\u78bc 3952\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u8207\u7528\u6236\u81ea\u5b9a\u7fa9\u51fd\u6578\uff08UDF\uff09\u6709\u95dc\uff0c\u7279\u5225\u662f\u5728\u8a2d\u7f6e\u5b57\u7b26\u96c6\u6642\u51fa\u73fe\u554f\u984c\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u8a72\u932f\u8aa4\u7684\u539f\u56e0\u3001\u5f71\u97ff\u4ee5\u53ca\u5982\u4f55\u9032\u884c\u6545\u969c\u4fee\u5fa9\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e5%8e%9f%e5%9b%a0%e5%88%86%e6%9e%90-zyQeHJrIcG\">\u932f\u8aa4\u539f\u56e0\u5206\u6790<\/h2>\n<p>\u932f\u8aa4\u865f\u78bc 3952 \u7684\u5177\u9ad4\u4fe1\u606f\u70ba\uff1a<code>ER_DA_UDF_INVALID_RETURN_TYPE_TO_SET_CHARSET<\/code>\u3002\u9019\u610f\u5473\u8457\u5728\u4f7f\u7528\u7528\u6236\u81ea\u5b9a\u7fa9\u51fd\u6578\u6642\uff0c\u8fd4\u56de\u7684\u6578\u64da\u985e\u578b\u4e0d\u7b26\u5408\u8a2d\u7f6e\u5b57\u7b26\u96c6\u7684\u8981\u6c42\u3002\u9019\u901a\u5e38\u767c\u751f\u5728\u4ee5\u4e0b\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li>\u7528\u6236\u81ea\u5b9a\u7fa9\u51fd\u6578\u7684\u8fd4\u56de\u985e\u578b\u4e0d\u6b63\u78ba\uff0c\u4f8b\u5982\u8fd4\u56de\u4e86\u4e0d\u652f\u6301\u7684\u6578\u64da\u985e\u578b\u3002<\/li>\n<li>\u5728\u8a2d\u7f6e\u5b57\u7b26\u96c6\u6642\uff0c\u672a\u6b63\u78ba\u8655\u7406\u8fd4\u56de\u503c\u7684\u5b57\u7b26\u96c6\u3002<\/li>\n<li>\u6578\u64da\u5eab\u7248\u672c\u4e0d\u652f\u6301\u67d0\u4e9b\u7279\u5b9a\u7684\u5b57\u7b26\u96c6\u6216\u6578\u64da\u985e\u578b\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%bd%b1%e9%9f%bf%e7%af%84%e5%9c%8d-zyQeHJrIcG\">\u5f71\u97ff\u7bc4\u570d<\/h2>\n<p>\u7576\u51fa\u73fe\u6b64\u932f\u8aa4\u6642\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u4ee5\u4e0b\u554f\u984c\uff1a<\/p>\n<ul>\n<li>\u7121\u6cd5\u57f7\u884c\u5305\u542b\u8a72 UDF \u7684 SQL \u67e5\u8a62\u3002<\/li>\n<li>\u6578\u64da\u5eab\u6027\u80fd\u4e0b\u964d\uff0c\u56e0\u70ba\u67e5\u8a62\u7121\u6cd5\u6b63\u5e38\u57f7\u884c\u3002<\/li>\n<li>\u61c9\u7528\u7a0b\u5e8f\u53ef\u80fd\u6703\u5d29\u6f70\u6216\u7121\u6cd5\u6b63\u5e38\u904b\u884c\uff0c\u5f71\u97ff\u7528\u6236\u9ad4\u9a57\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-zyQeHJrIcG\">\u6545\u969c\u4fee\u5fa9\u6b65\u9a5f<\/h2>\n<p>\u8981\u4fee\u5fa9 MySQL \u932f\u8aa4\u865f\u78bc 3952\uff0c\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9a5f\u9032\u884c\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5-udf-%e7%9a%84%e8%bf%94%e5%9b%9e%e9%a1%9e%e5%9e%8b-zyQeHJrIcG\">1. \u6aa2\u67e5 UDF \u7684\u8fd4\u56de\u985e\u578b<\/h3>\n<p>\u9996\u5148\uff0c\u6aa2\u67e5\u7528\u6236\u81ea\u5b9a\u7fa9\u51fd\u6578\u7684\u5b9a\u7fa9\uff0c\u78ba\u4fdd\u5176\u8fd4\u56de\u985e\u578b\u662f\u6b63\u78ba\u7684\u3002\u4f8b\u5982\uff0c\u5982\u679c\u51fd\u6578\u61c9\u8fd4\u56de\u5b57\u7b26\u4e32\uff0c\u5247\u61c9\u4f7f\u7528 <code>VARCHAR<\/code> \u6216 <code>TEXT<\/code> \u985e\u578b\uff0c\u800c\u4e0d\u662f\u6574\u6578\u6216\u5176\u4ed6\u4e0d\u517c\u5bb9\u7684\u985e\u578b\u3002<\/p>\n<pre><code>CREATE FUNCTION my_function() RETURNS VARCHAR(255)\nBEGIN\n    RETURN 'Hello, World!';\nEND;<\/code><\/pre>\n<h3 id=\"2-%e7%a2%ba%e8%aa%8d%e5%ad%97%e7%ac%a6%e9%9b%86%e8%a8%ad%e7%bd%ae-zyQeHJrIcG\">2. \u78ba\u8a8d\u5b57\u7b26\u96c6\u8a2d\u7f6e<\/h3>\n<p>\u6aa2\u67e5\u6578\u64da\u5eab\u548c\u8868\u7684\u5b57\u7b26\u96c6\u8a2d\u7f6e\uff0c\u78ba\u4fdd\u5b83\u5011\u8207 UDF \u7684\u8fd4\u56de\u985e\u578b\u76f8\u5339\u914d\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u67e5\u8a62\u4f86\u6aa2\u67e5\u5b57\u7b26\u96c6\uff1a<\/p>\n<pre><code>SHOW VARIABLES LIKE 'character_set%';<\/code><\/pre>\n<h3 id=\"3-%e6%9b%b4%e6%96%b0-mysql-%e7%89%88%e6%9c%ac-zyQeHJrIcG\">3. \u66f4\u65b0 MySQL \u7248\u672c<\/h3>\n<p>\u5982\u679c\u4ee5\u4e0a\u6b65\u9a5f\u7121\u6cd5\u89e3\u6c7a\u554f\u984c\uff0c\u8003\u616e\u66f4\u65b0 MySQL \u5230\u6700\u65b0\u7248\u672c\u3002\u67d0\u4e9b\u820a\u7248\u672c\u53ef\u80fd\u4e0d\u652f\u6301\u7279\u5b9a\u7684\u5b57\u7b26\u96c6\u6216\u6578\u64da\u985e\u578b\uff0c\u66f4\u65b0\u5f8c\u53ef\u80fd\u6703\u89e3\u6c7a\u6b64\u554f\u984c\u3002<\/p>\n<h3 id=\"4-%e6%b8%ac%e8%a9%a6%e5%92%8c%e9%a9%97%e8%ad%89-zyQeHJrIcG\">4. \u6e2c\u8a66\u548c\u9a57\u8b49<\/h3>\n<p>\u5728\u9032\u884c\u4efb\u4f55\u66f4\u6539\u5f8c\uff0c\u52d9\u5fc5\u9032\u884c\u6e2c\u8a66\u4ee5\u78ba\u4fdd\u554f\u984c\u5df2\u89e3\u6c7a\u3002\u53ef\u4ee5\u4f7f\u7528\u7c21\u55ae\u7684\u67e5\u8a62\u4f86\u9a57\u8b49 UDF \u662f\u5426\u6b63\u5e38\u5de5\u4f5c\uff1a<\/p>\n<pre><code>SELECT my_function();<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-zyQeHJrIcG\">\u7d50\u8ad6<\/h2>\n<p>MySQL \u932f\u8aa4\u865f\u78bc 3952 \u662f\u4e00\u500b\u8207\u7528\u6236\u81ea\u5b9a\u7fa9\u51fd\u6578\u8fd4\u56de\u985e\u578b\u6709\u95dc\u7684\u554f\u984c\uff0c\u901a\u904e\u6aa2\u67e5\u51fd\u6578\u5b9a\u7fa9\u3001\u5b57\u7b26\u96c6\u8a2d\u7f6e\u548c MySQL \u7248\u672c\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u9032\u884c\u6545\u969c\u4fee\u5fa9\u3002\u5c0d\u65bc\u4f7f\u7528 MySQL \u7684\u958b\u767c\u8005\u4f86\u8aaa\uff0c\u4e86\u89e3\u9019\u4e9b\u932f\u8aa4\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u61c9\u7528\u7a0b\u5e8f\u7684\u7a69\u5b9a\u6027\u548c\u6027\u80fd\u3002<\/p>\n<p>\u5982\u9700\u9032\u4e00\u6b65\u4e86\u89e3\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u548c\u5176\u4ed6\u6578\u64da\u5eab\u7ba1\u7406\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Fix MySQL Error 3952: ER_DA_UDF_INVALID_RETURN_TYPE_TO_SET_CHARSET. Learn troubleshooting steps for remote handling of this SQLSTATE: HY000 issue.<\/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-66865","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66865","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=66865"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66865\/revisions"}],"predecessor-version":[{"id":66866,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66865\/revisions\/66866"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=66865"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=66865"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=66865"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}