下面是一个示例代码,演示了mysql_errno函数的用法: #include<mysql.h>#include<stdio.h>intmain(){MYSQL*mysql;mysql=mysql_init(NULL);if(mysql_real_connect(mysql,"localhost","username","password","database",0,NULL,0)){// 连接成功printf("Connected to MySQL server\n");}else{// 连接失败printf...
mysql_eof()确定是否读取了结果集的最后一行。该函数已不再被重视,可以使用mysql_errno()或mysql_error()取而代之。 mysql_errno()返回上次调用的MySQL函数的错误编号。 mysql_error()返回上次调用的MySQL函数的错误消息。 mysql_escape_string()为了用在SQL语句中,对特殊字符进行转义处理。
unsignedintmysql_errno(MYSQL *mysql) constchar*mysql_error(MYSQL *mysql) 说明:一个函数是返回错误号,一个返回错误信息,两者都以MYSQL*为参数,很直观。 第一步:进行查询操作 用到的函数: intmysql_query(MYSQL *mysql,constchar*stmt_str) intmysql_real_query(MYSQL *mysql,constchar*stmt_str, unsigned ...
unsignedintmysql_errno(MYSQL*mysql) Description For the connection specified bymysql,mysql_errno()returns the error code for the most recently invoked API function that can succeed or fail. A return value of zero means that no error occurred. Client error message numbers are listed in the MySQL...
print_error (MYSQL *conn, char *message) { fprintf(stderr, "%s\n", message); if (conn !=NULL) { fprintf(stderr, "Error %u (%s): %s\n", mysql_errno (conn), mysql_sqlstate (conn), mysql_error (conn)); } } /* * Likeprint_error(), but use statement handler rather than ...
5.4.14 mysql_errno() unsignedintmysql_errno(MYSQL*mysql) For the connection specified bymysql,mysql_errno()returns the error code for the most recently invoked API function that can succeed or fail. A return value of zero means that no error occurred. Client error message numbers are listed ...
mysql_error返回的是string···你应该这么写 if(mysql_error != '') { xxxxxxx }
mysql_use_result()用于逐行检索结果集。 语法 MYSQL_RES*mysql_use_result(MYSQL*mysql) 返回值 返回一个MYSQL_RES结果结构;如果发生错误,则返回NULL。 报错信息 如果成功,mysql_use_result()会重置mysql_error()和mysql_errno()。 CR_COMMANDS_OUT_OF_SYNC:命令的执行顺序不正确。
unsigned int STDCALL mysql_errno(MYSQL *mysql); const char * STDCALL mysql_error(MYSQL *mysql); const char *STDCALL mysql_sqlstate(MYSQL *mysql); unsigned int STDCALL mysql_warning_count(MYSQL *mysql); const char * STDCALL mysql_info(MYSQL *mysql); unsigned long STDCALL mysql_thread...
Re: After kill query, mysql_stmt_close() hangs for prepared stmt 230 Georgi Kodinov 07/19/2022 01:46AM Re: After kill query, mysql_stmt_close() hangs for prepared stmt 232 Sebastien FLAESCH 08/01/2022 08:52AM Not consisent result about mysql_stmt_execute and mysql_stmt_errno. ...