{"id":178608,"date":"2024-11-08T19:23:18","date_gmt":"2024-11-08T11:23:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/178608\/"},"modified":"2024-11-08T19:23:19","modified_gmt":"2024-11-08T11:23:19","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a42050-cr_fetch_canceled-%e9%80%9a%e8%bf%87mysql_stmt_close%e8%b0%83%e7%94%a8%e5%8f%96%e6%b6%88%e4%ba%86%e8%a1%8c%e6%a3%80%e7%b4%a2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/178608\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa42050 &#8211; (CR_FETCH_CANCELED) \u901a\u8fc7mysql_stmt_close()\u8c03\u7528\u53d6\u6d88\u4e86\u884c\u68c0\u7d22"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a42050-cr_fetch_canceled-%e9%80%9a%e8%bf%87mysql_stmt_close%e8%b0%83%e7%94%a8%e5%8f%96%e6%b6%88%e4%ba%86%e8%a1%8c%e6%a3%80%e7%b4%a2-xPUbPjVzAp\">\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa42050 &#8211; (CR_FETCH_CANCELED) \u901a\u8fc7mysql_stmt_close()\u8c03\u7528\u53d6\u6d88\u4e86\u884c\u68c0\u7d22<\/h1>\n<p>\u5728\u4f7f\u7528MySQL\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u932f\u8aa42050\uff0c\u8a72\u932f\u8aa4\u7684\u63cf\u8ff0\u70ba\u201c(CR_FETCH_CANCELED) \u901a\u8fc7mysql_stmt_close()\u8c03\u7528\u53d6\u6d88\u4e86\u884c\u68c0\u7d22\u201d\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u767c\u751f\u5728\u4f7f\u7528\u9810\u8655\u7406\u8a9e\u53e5\u6642\uff0c\u7576\u4f60\u5617\u8a66\u95dc\u9589\u4e00\u500b\u5c1a\u672a\u5b8c\u6210\u7684\u67e5\u8a62\u6642\uff0cMySQL\u6703\u8fd4\u56de\u6b64\u932f\u8aa4\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u8a72\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e5%8e%9f%e5%9b%a0%e5%88%86%e6%9e%90-xPUbPjVzAp\">\u932f\u8aa4\u539f\u56e0\u5206\u6790<\/h2>\n<p>MySQL\u932f\u8aa42050\u7684\u4e3b\u8981\u539f\u56e0\u662f\u7576\u4f60\u4f7f\u7528\u9810\u8655\u7406\u8a9e\u53e5\uff08prepared statements\uff09\u9032\u884c\u6578\u64da\u6aa2\u7d22\u6642\uff0c\u672a\u80fd\u6b63\u78ba\u8655\u7406\u7d50\u679c\u96c6\u3002\u7576\u4f60\u8abf\u7528 <code>mysql_stmt_close()<\/code> \u51fd\u6578\u4f86\u95dc\u9589\u4e00\u500b\u9810\u8655\u7406\u8a9e\u53e5\u6642\uff0c\u5982\u679c\u8a72\u8a9e\u53e5\u4ecd\u5728\u6aa2\u7d22\u6578\u64da\uff0c\u5247\u6703\u5c0e\u81f4\u6b64\u932f\u8aa4\u3002\u9019\u901a\u5e38\u767c\u751f\u5728\u4ee5\u4e0b\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li>\u5728\u7d50\u679c\u96c6\u5c1a\u672a\u5b8c\u5168\u6aa2\u7d22\u6642\u95dc\u9589\u9810\u8655\u7406\u8a9e\u53e5\u3002<\/li>\n<li>\u5728\u591a\u6b21\u57f7\u884c\u540c\u4e00\u9810\u8655\u7406\u8a9e\u53e5\u6642\uff0c\u672a\u80fd\u6b63\u78ba\u7ba1\u7406\u7d50\u679c\u96c6\u3002<\/li>\n<li>\u5728\u7570\u6b65\u64cd\u4f5c\u4e2d\uff0c\u672a\u80fd\u6b63\u78ba\u8655\u7406\u6578\u64da\u6aa2\u7d22\u7684\u72c0\u614b\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-xPUbPjVzAp\">\u89e3\u6c7a\u65b9\u6848<\/h2>\n<p>\u8981\u4fee\u5fa9MySQL\u932f\u8aa42050\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u63a1\u53d6\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e7%a2%ba%e4%bf%9d%e5%ae%8c%e6%95%b4%e6%aa%a2%e7%b4%a2%e7%b5%90%e6%9e%9c%e9%9b%86-xPUbPjVzAp\">1. \u78ba\u4fdd\u5b8c\u6574\u6aa2\u7d22\u7d50\u679c\u96c6<\/h3>\n<p>\u5728\u95dc\u9589\u9810\u8655\u7406\u8a9e\u53e5\u4e4b\u524d\uff0c\u5fc5\u9808\u78ba\u4fdd\u5df2\u7d93\u5b8c\u5168\u6aa2\u7d22\u4e86\u6240\u6709\u7684\u7d50\u679c\u96c6\u3002\u53ef\u4ee5\u4f7f\u7528 <code>mysql_stmt_fetch()<\/code> \u51fd\u6578\u4f86\u6aa2\u67e5\u662f\u5426\u9084\u6709\u66f4\u591a\u7684\u884c\u53ef\u4f9b\u6aa2\u7d22\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre><code>\nMYSQL_STMT *stmt;\nMYSQL_BIND bind[1];\nint id;\nstmt = mysql_stmt_init(conn);\nmysql_stmt_prepare(stmt, \"SELECT id FROM users\", strlen(\"SELECT id FROM users\"));\nmysql_stmt_execute(stmt);\n\n\/\/ \u78ba\u4fdd\u6aa2\u7d22\u6240\u6709\u884c\nwhile (mysql_stmt_fetch(stmt) == 0) {\n    \/\/ \u8655\u7406\u6bcf\u4e00\u884c\n}\nmysql_stmt_close(stmt);\n<\/code><\/pre>\n<h3>2. \u4f7f\u7528 <code>mysql_stmt_reset()<\/code> \u51fd\u6578<\/h3>\n<p>\u5982\u679c\u4f60\u9700\u8981\u91cd\u8907\u57f7\u884c\u540c\u4e00\u9810\u8655\u7406\u8a9e\u53e5\uff0c\u5efa\u8b70\u5728\u95dc\u9589\u8a9e\u53e5\u4e4b\u524d\u4f7f\u7528 <code>mysql_stmt_reset()<\/code> \u51fd\u6578\u4f86\u91cd\u7f6e\u8a9e\u53e5\u7684\u72c0\u614b\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6240\u6709\u7684\u7d50\u679c\u96c6\u90fd\u88ab\u6b63\u78ba\u8655\u7406\uff0c\u4e26\u4e14\u4e0d\u6703\u5c0e\u81f4\u932f\u8aa42050\u7684\u767c\u751f\u3002<\/p>\n<pre><code>\nmysql_stmt_reset(stmt);\n<\/code><\/pre>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5%e7%95%b0%e6%ad%a5%e6%93%8d%e4%bd%9c-xPUbPjVzAp\">3. \u6aa2\u67e5\u7570\u6b65\u64cd\u4f5c<\/h3>\n<p>\u5982\u679c\u4f60\u7684\u61c9\u7528\u7a0b\u5e8f\u4f7f\u7528\u7570\u6b65\u64cd\u4f5c\uff0c\u8acb\u78ba\u4fdd\u5728\u95dc\u9589\u9810\u8655\u7406\u8a9e\u53e5\u4e4b\u524d\uff0c\u6240\u6709\u7684\u6578\u64da\u6aa2\u7d22\u64cd\u4f5c\u90fd\u5df2\u7d93\u5b8c\u6210\u3002\u53ef\u4ee5\u4f7f\u7528\u56de\u8abf\u51fd\u6578\u6216\u4e8b\u4ef6\u5faa\u74b0\u4f86\u7ba1\u7406\u9019\u4e9b\u64cd\u4f5c\uff0c\u78ba\u4fdd\u5728\u95dc\u9589\u8a9e\u53e5\u4e4b\u524d\u4e0d\u6703\u6709\u672a\u5b8c\u6210\u7684\u6aa2\u7d22\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-xPUbPjVzAp\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u932f\u8aa42050\u901a\u5e38\u662f\u7531\u65bc\u5728\u672a\u5b8c\u6210\u7684\u6578\u64da\u6aa2\u7d22\u904e\u7a0b\u4e2d\u95dc\u9589\u9810\u8655\u7406\u8a9e\u53e5\u6240\u5f15\u8d77\u7684\u3002\u901a\u904e\u78ba\u4fdd\u5b8c\u6574\u6aa2\u7d22\u7d50\u679c\u96c6\u3001\u4f7f\u7528 <code>mysql_stmt_reset()<\/code> \u51fd\u6578\u4ee5\u53ca\u59a5\u5584\u7ba1\u7406\u7570\u6b65\u64cd\u4f5c\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u907f\u514d\u6b64\u932f\u8aa4\u7684\u767c\u751f\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u65b9\u6848\u53ef\u4ee5\u63d0\u4f9b\u7a69\u5b9a\u7684\u6578\u64da\u5eab\u652f\u6301\uff0c\u9032\u4e00\u6b65\u63d0\u5347\u61c9\u7528\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4fee\u5fa9MySQL\u932f\u8aa42050 (CR_FETCH_CANCELED) \u7684\u65b9\u6cd5\uff0c\u901a\u904e\u6b63\u78ba\u4f7f\u7528mysql_stmt_close()\u4f86\u907f\u514d\u884c\u6aa2\u7d22\u53d6\u6d88\u554f\u984c\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-178608","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178608","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=178608"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178608\/revisions"}],"predecessor-version":[{"id":178609,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178608\/revisions\/178609"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=178608"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=178608"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=178608"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}