官方说明: https://dev.mysql.com/doc/refman/5.7/en/mysql-real-escape-string.html 相关资料: https://dev.mysql.com/worklog/task/?id=8077 从MySQL 5.7.6版本开始,如果启用了NO_BACKSLASH_ESCAPES, 则mysql_real_escape_string()函数失败,错误码为CR_INSECURE_API_ERR, 这个时候应当使用mysql_real_escape_string_quote()替代mysql_real_escape_string()。 启用NO_BACKSLASH_ESCAPES,表示将反斜杠当作普通字符,而不是转义字符: SET sql_mode='NO_BACKSLASH_ESCAPES'; 查看当前的SQL模式: mysql> SELECT @@sql_mode; +--------------------------------------------+ | @@sql_mode | +--------------------------------------------+ | STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION | +--------------------------------------------+ 1 row in set (0.01 sec) 未启用NO_BACKSLASH_ESCAPES前(反斜杠为转义字符): mysql> SELECT '\\'\G; *************************** 1. row *************************** \: \ 1 row in set (0.00 sec) 在启用NO_BACKSLASH_ESCAPES后(反斜杠为普通字符): mysql> SET sql_mode='NO_BACKSLASH_ESCAPES'; Query OK, 0 rows affected (0.00 sec) mysql> SELECT '\\'\G; *************************** 1. row *************************** \\: \\ 1 row in set (0.00 sec) mysql> SELECT '\"'\G; *************************** 1. row *************************** \": \" 1 row in set (0.00 sec) 相关源代码: #define CR_INSECURE_API_ERR 2062 测试代码(https://github.com/eyjian/mooon/blob/master/mooon/tools/mysql_escape_test.cpp): try { // 未启用NO_BACKSLASH_ESCAPES printf("%s\n", mysql.escape_string(argv[2]).c_str()); // 启用NO_BACKSLASH_ESCAPES mysql.update("%s", "SET sql_mode='NO_BACKSLASH_ESCAPES'"); printf("%s\n", mysql.escape_string(argv[2]).c_str()); } catch (mooon::sys::CDBException& ex) { fprintf(stderr, "%s\n", ex.str().c_str()); } 运行结果: # ./mysql_escape_test 'root@127.0.0.1:3306' '0x1a' MYSQL_SERVER_VERSION: 5.7.12 0x1a db_exception://[2062]Insecure API function call: 'mysql_real_escape_string' Use instead: 'mysql_real_escape_string_quote'@/data/X/mooon/src/sys/mysql_db.cpp:166 mysql_real_escape_string_quote函数(MySQL 5.7.6引入): unsigned long mysql_real_escape_string_quote(MYSQL *mysql, char *to, const char *from, unsigned long from_length, char quote); 返回值:被转后的长度 参数to:被转后的 参数from:被转前的 参数length:from的有效字符数,不包括结尾符 参数quote:需要处理的字符,如:\, ', ", NUL (ASCII 0), \n, \r