这个东东也是折腾了几天,网上很多文章可能已经过时,所以写下不同,以备后用.

参考网址:

http://blog.csdn.net/genganpeng/article/details/7402229

http://blog.csdn.net/liefdiy/article/details/5348583

http://blog.itpub.net/81/viewspace-710064/

http://www.software8.co/wzjs/czxt/4668.html

为什么要用 OTL去连接mysql.

OTL是一个纯C++的通用数据库连接模板库，可以支持各种当下流行的数据库，如Oracle，Sybase, MySQL, PostgreSQL, EnterpriseDB, SQLite, MS ACCESS, Firebird等等.它是一个跨平台类库，在MS Windows, Linux/Unix/Mac OS X 都可以使用。

可baidu C++ OTL深入了解.

环境

Linux

root@debian:~# uname -a
Linux debian 3.2.0-4-amd64 #1 SMP Debian 3.2.65-1 x86_64 GNU/Linux

mysql

root@debian:~# mysql --version
mysql Ver 14.14 Distrib 5.5.43, for debian-linux-gnu (x86_64) using readline 6.2

unixODBC

root@debian:~# isql --versoin

unixODBC 2.3.2

OTL版本

OTL 4.0.359

下载地址:http://otl.sourceforge.net/

程序安装

1,unixODBC

下载地址:

http://www.unixodbc.org/

1. copy the unixODBC-2.3.2.tar.gz file somewhere you can create files and directories
2. gunzip unixODBC*.tar.gz
3. tar xvf unixODBC*.tar

./configure
make
make install

就OK了

2,mysql

apt-get install mysql-server mysql-client

还需要安装 mysql的odbc驱动

下载地址:

http://mirrors.sohu.com/mysql/Connector-ODBC/5.3/

如果是新版本改下5.3这个版本号就ok.

我的linux 是x64所以下载

mysql-connector-odbc-5.3.2-linux-glibc2.5-x86-64bit.tar.gz

安装对应的数据库驱动。比如mysql 对应 libmyodbc。安装完后查看下库包含的文件就可以找到对应的lib
--此次强烈建议用源码安装。ubuntu 安装很简单apt-get就好，rpm 包会有依赖问题，YUM 有些包会冲突。
tar zxvf mysql-connector-odbc-5.1.11-linux-el6-x86-64bit.tar.gz
cd mysql-connector-odbc-5.1.11-linux-el6-x86-64bit\lib

#复制到 /usr/local/lib

cp ./*.* /usr/local/lib

2.1 mysql 测试前的准备.

#使用mysql数据库
use mysql;
 
#查询
select host,user,password  from user;
 
#更新root密码
update user set password=PASSWORD('') where user='root' ;
 
#刷新
flush privileges;
 
#创建新用户,设置任何地方都可以访问.
#命令:CREATE USER 'username'@'host' IDENTIFIED BY 'password';
create user 'dbadmin'@'%' identified by 'aaaaaa';
 
#创建数据库 test1,设置utf8格式编码
Create DATABASE IF NOT EXISTS test1  default charset utf8 COLLATE utf8_general_ci; 
 
#显示数据库
show databases;
 
#设置数据库test1的所有权限给 dbadmin用户 .
grant all on test1.* to 'dbadmin'@'%' ;
 
#刷新
flush privileges;

mysql配置文件my.cnf详解 :

http://blog.chinaunix.net/uid-20639775-id-154429.html

http://blog.sina.com.cn/s/blog_a8b2435901016f5f.html

mysql 更改数据库目录:

http://blog.chinaunix.net/uid-77311-id-3485225.html

mysql 更改数据编码:

http://www.pc6.com/infoview/Article_63586.html

http://blog.chinaunix.net/uid-223060-id-2127099.html

最后/etc/mysql/my.cnf 的内容为:

#
# The MySQL database server configuration file.
#
# You can copy this to one of:
# - "/etc/mysql/my.cnf" to set global options,
# - "~/.my.cnf" to set user-specific options.
#
# One can use all long options that the program supports.
# Run program with --help to get a list of available options and with
# --print-defaults to see which it would actually understand and use.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html
 
# This will be passed to all mysql clients
# It has been reported that passwords should be enclosed with ticks/quotes
# escpecially if they contain "#" chars...
# Remember to edit /etc/mysql/debian.cnf when changing the socket location.
[client]
port        = 3306
socket        = /var/run/mysqld/mysqld.sock
 
#设置编译
default-character-set = utf8
 
# Here is entries for some specific programs
# The following values assume you have at least 32M ram
 
# This was formally known as [safe_mysqld]. Both versions are currently parsed.
[mysqld_safe]
socket        = /var/run/mysqld/mysqld.sock
nice        = 0
 
[mysqld]
#
# * Basic Settings
#
user        = mysql
pid-file    = /var/run/mysqld/mysqld.pid
socket        = /var/run/mysqld/mysqld.sock
port        = 3306
basedir        = /usr
#datadir        = /var/lib/mysql  #原数据库目录
datadir        = /xxx/x/xxx/mysql  #现数据库目录
tmpdir        = /tmp
lc-messages-dir    = /usr/share/mysql
 
#设置编译
default-storage-engine=INNODB
character-set-server=utf8
collation-server=utf8_general_ci
 
skip-external-locking
#
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
#bind-address        = 127.0.0.1
#
# * Fine Tuning
#
key_buffer        = 16M
max_allowed_packet    = 16M
thread_stack        = 192K
thread_cache_size       = 8
# This replaces the startup script and checks MyISAM tables if needed
# the first time they are touched
myisam-recover         = BACKUP
#max_connections        = 100
#table_cache            = 64
#thread_concurrency     = 10
#
# * Query Cache Configuration
#
query_cache_limit    = 1M
query_cache_size        = 16M
#
# * Logging and Replication
#
# Both location gets rotated by the cronjob.
# Be aware that this log type is a performance killer.
# As of 5.1 you can enable the log at runtime!
#general_log_file        = /var/log/mysql/mysql.log
#general_log             = 1
#
# Error logging goes to syslog due to /etc/mysql/conf.d/mysqld_safe_syslog.cnf.
#
# Here you can see queries with especially long duration
#log_slow_queries    = /var/log/mysql/mysql-slow.log
#long_query_time = 2
#log-queries-not-using-indexes
#
# The following can be used as easy to replay backup logs or for replication.
# note: if you are setting up a replication slave, see README.Debian about
#       other settings you may need to change.
#server-id        = 1
#log_bin            = /var/log/mysql/mysql-bin.log
expire_logs_days    = 10
max_binlog_size         = 100M
#binlog_do_db        = include_database_name
#binlog_ignore_db    = include_database_name
#
# * InnoDB
#
# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.
# Read the manual for more InnoDB related options. There are many!
#
# * Security Features
#
# Read the manual, too, if you want chroot!
# chroot = /var/lib/mysql/
#
# For generating SSL certificates I recommend the OpenSSL GUI "tinyca".
#
# ssl-ca=/etc/mysql/cacert.pem
# ssl-cert=/etc/mysql/server-cert.pem
# ssl-key=/etc/mysql/server-key.pem
 
[mysqldump]
quick
quote-names
max_allowed_packet    = 16M
 
[mysql]
#no-auto-rehash    # faster start of mysql but no tab completition
 
[isamchk]
key_buffer        = 16M
 
#
# * IMPORTANT: Additional settings that can override those from this file!
#   The files must end with '.cnf', otherwise they'll be ignored.
#
!includedir /etc/mysql/conf.d/

配置unixodbc

UNIXODBC 安装好后会有:

/etc/odbcinst.ini 和 /etc/odbc.ini ********但配置这两个文件不会生效,原因我暂时没有找到.请高手指点.

/usr/local/etc/odbcinst.ini 和 /usr/local/etc/odbc.ini 这两个配置文件才会生效.

/usr/local/etc/odbcinst.ini 配置:

#Section
[mysqlodbc]　
#libmyodbc5w.so 和libmyodbc5a.so的区别
Driver=/usr/local/lib/libmyodbc5w.so　　　　　　
SETUP=/usr/local/lib/libmyodbc5w.so
UsageCount=1

关于 libmyodbc5w.so 和libmyodbc5a.so的区别在

http://bugs.mysql.com/bug.php?id=69837

找到了相应的答案.

　　The odbcinst.ini file shows the driver library name as libmyodbc5.so, which
    is not right for Connector/ODBC 5.2.5. It has to be either libmyodbc5w.so
    (Unicode version) or libmyodbc5a.so (ANSI version). So, which version of
    Connector/ODBC 5.2.5 you used? Was it Unicode (w) or ANSI (a)?

　　libmyodbc5w.so  是unicode 版本的.

　　libmyodbc5a.so 是ansi版本的.

/usr/local/etc/odbc.ini 配置:

#Section
[TEST]　　　　
#Driver=/usr/local/lib/libmyodbc5a.so
Description = The Database for mysql
Trace = On
TraceFile = stderr
#odbcinst.ini 中指定的Section
Driver = mysqlodbc
#数据库IP
SERVER = localhost
#用户名
USER = sa2
#密码　　　　
PASSWORD = 111111
#数据库端口
PORT = 3306
#要连接的数据库　　　　　
DATABASE = test1
#虽然这儿指定 mysqld.sock位置,但后面还是会报错,下文有相应解决办法.
socket=/var/run/mysqld/mysqld.sock
#指定编码
charset = UTF8
option = 3

在配置文件里，DSN的名字即为Section的名字。在配置信息中，有一部分配置项是ODBC使用的，另一部分则由驱动程序处理。如果操作完全正确的话，现在ODBC已经成功了。可以试下isql命令操作刚配置的DSN。

可能会报错误:

Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)

通过查看

　　cat /etc/mysql/my.cnf 可以得知:

　　socket = /var/run/mysqld/mysqld.sock

　　最简单的办法建立软连接.

　　命令:ln -s /var/run/mysqld/mysqld.sock /tmp/mysql.sock

　　查看:

root@debian:/home/c2# ls -l /tmp
total 0
lrwxrwxrwx 1 root root 27 Jul 10 00:39 mysql.sock -> /var/run/mysqld/mysqld.sock

　　连接成功.

　　再运行命令:

root@debian:~# isql TEST -v
+---------------------------------------+
| Connected!                            |
|                                       |
| sql-statement                         |
| help [tablename]                      |
| quit                                  |
|                                       |
+---------------------------------------+
SQL> select * from t1;
+-----------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Id        | name                                                                                                                                                                                                                                                           | name2                                                                                                                                                                                                                                                          |
+-----------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| 1         | 杩姣                                                                                                                                                                                                                                                         | 灏3                                                                                                                                                                                                                                                           |
| 2         | rq                                                                                                                                                                                                                                                             | fasdf                                                                                                                                                                                                                                                          |
| 3         | 灏寮?                                                                                                                                                                                                                                                        | xiaoZ                                                                                                                                                                                                                                                          |
+-----------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
SQLRowCount returns 3
3 rows fetched
SQL>

t1表的视图:

通过OTL连接mysql

目录内容如下:

otltest.cpp内容如下:

#include <iostream>
using namespace std;
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
 
#include <stdio.h>
 
// Thefollowing #define is required with MyODBC 5.1 and higher
//#define OTL_ODBC_SELECT_STM_EXECUTE_BEFORE_DESCRIBE  
 
#define OTL_ODBC // CompileOTL 4.0/ODBC
#define OTL_ODBC_UNIX // uncomment this line if UnixODBC is used
//#define OTL_UNICODE // Compile OTL with Unicode    --->屏蔽 使用时中文显示乱码
 
#include "otlv4.h" // include the OTL 4.0 header file
 
otl_connect db; // connect object
 
void select()
{
    try{
        otl_stream ostream1(500, // buffer size
            "select * from t1 ",
            // SELECT statement
            db // connect object
            );
        // create select stream
 
        int id;
        unsigned char user[255];
        unsigned  char name[255];
 
        while(!ostream1.eof())
        { // while not end-of-data
            //ostream1>>id>>user>>name;
            ostream1>>id;
            ostream1>>user;
            ostream1>>name;
            cout<<"id="<<id<<endl;
            cout<<"user="<<user<<endl;
            cout<<"name="<<name<<endl;
 
        }
    }
 
    catch(otl_exception& p)
    { // intercept OTL exceptions
 
        cout<<"otl_exception:"<<endl;
        cerr<<p.msg<<endl; // print out error message
        cerr<<p.stm_text<<endl; // print out SQL that caused the error
        cerr<<p.var_info<<endl; // print out the variable that caused the error
    }
 
}
 
int main()
{
 
    cout<<"hello"<<endl;
    otl_connect::otl_initialize(); // initialize the database API environment
    try{
 
        db.rlogon("sa2/111111@TEST"); // connect to the database 这儿是  用户名/密码@section名 (/usr/local/etc/odbc.ini  的section名)
 
        select(); // select records from table
 
    }
 
    catch(otl_exception& p){ // intercept OTL exceptions
        cerr<<p.msg<<endl; // print out error message
        cerr<<p.stm_text<<endl; // print out SQL that caused the error
        cerr<<p.var_info<<endl; // print out the variable that caused the error
    }
 
    db.logoff(); // disconnect from the database
 
    return 0;
 
}

CMakeLists.txt 内容:

cmake_minimum_required (VERSION 2.6)
project (otltest2)
add_executable(otltest2 otltest.cpp)
target_link_libraries(otltest2 libmyodbc5a.so)   --->

　　一定要添加 libmyodbc5a.so  否则会出现 SQLFreeHandle  之类的错误

root@debian:/home/c2# make
-- Configuring done
-- Generating done
-- Build files have been written to: /home/c2
Scanning dependencies of target otltest2
[100%] Building CXX object CMakeFiles/otltest2.dir/otltest.cpp.o
Linking CXX executable otltest2
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_conn::~otl_conn()':
otltest.cpp:(.text._ZN8otl_connD2Ev[_ZN8otl_connD5Ev]+0x63): undefined reference to `SQLFreeHandle'
otltest.cpp:(.text._ZN8otl_connD2Ev[_ZN8otl_connD5Ev]+0x9b): undefined reference to `SQLFreeHandle'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_conn::rlogon(char const*, int)':
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x532): undefined reference to `SQLAllocHandle'
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x588): undefined reference to `SQLSetEnvAttr'
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x5df): undefined reference to `SQLAllocHandle'
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x64c): undefined reference to `SQLSetConnectAttr'
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x67d): undefined reference to `SQLSetConnectAttr'
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x6eb): undefined reference to `SQLSetConnectAttr'
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x765): undefined reference to `SQLConnect'
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x85e): undefined reference to `SQLDriverConnect'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_conn::logoff()':
otltest.cpp:(.text._ZN8otl_conn6logoffEv[_ZN8otl_conn6logoffEv]+0x57): undefined reference to `SQLDisconnect'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_conn::error(otl_exc&)':
otltest.cpp:(.text._ZN8otl_conn5errorER7otl_exc[_ZN8otl_conn5errorER7otl_exc]+0x67): undefined reference to `SQLGetDiagRec'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_conn::commit()':
otltest.cpp:(.text._ZN8otl_conn6commitEv[_ZN8otl_conn6commitEv]+0x22): undefined reference to `SQLEndTran'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::open(otl_conn&)':
otltest.cpp:(.text._ZN7otl_cur4openER8otl_conn[_ZN7otl_cur4openER8otl_conn]+0x4b): undefined reference to `SQLAllocHandle'
otltest.cpp:(.text._ZN7otl_cur4openER8otl_conn[_ZN7otl_cur4openER8otl_conn]+0xa7): undefined reference to `SQLSetStmtAttr'
otltest.cpp:(.text._ZN7otl_cur4openER8otl_conn[_ZN7otl_cur4openER8otl_conn]+0x100): undefined reference to `SQLSetStmtAttr'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::close(char)':
otltest.cpp:(.text._ZN7otl_cur5closeEc[_ZN7otl_cur5closeEc]+0x2d): undefined reference to `SQLFreeHandle'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::sql_row_count(long*)':
otltest.cpp:(.text._ZN7otl_cur13sql_row_countEPl[_ZN7otl_cur13sql_row_countEPl]+0x23): undefined reference to `SQLRowCount'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::parse(char*)':
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x498): undefined reference to `SQLTables'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x520): undefined reference to `SQLStatistics'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x566): undefined reference to `SQLGetTypeInfo'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x604): undefined reference to `SQLColumns'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x67c): undefined reference to `SQLProcedures'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x71a): undefined reference to `SQLColumnPrivileges'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x792): undefined reference to `SQLTablePrivileges'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x80a): undefined reference to `SQLPrimaryKeys'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x8a8): undefined reference to `SQLProcedureColumns'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x97e): undefined reference to `SQLForeignKeys'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0xa18): undefined reference to `SQLExecDirect'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0xc53): undefined reference to `SQLPrepare'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::exec(int, int, unsigned char)':
otltest.cpp:(.text._ZN7otl_cur4execEiih[_ZN7otl_cur4execEiih]+0x79): undefined reference to `SQLSetStmtAttr'
otltest.cpp:(.text._ZN7otl_cur4execEiih[_ZN7otl_cur4execEiih]+0xe1): undefined reference to `SQLExecute'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::bind(char const*, otl_var&, int, int, int, int, int, int)':
otltest.cpp:(.text._ZN7otl_cur4bindEPKcR7otl_variiiiii[_ZN7otl_cur4bindEPKcR7otl_variiiiii]+0x16b): undefined reference to `SQLBindParameter'
otltest.cpp:(.text._ZN7otl_cur4bindEPKcR7otl_variiiiii[_ZN7otl_cur4bindEPKcR7otl_variiiiii]+0x233): undefined reference to `SQLBindParameter'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::bind(int, otl_var&, int, int, int)':
otltest.cpp:(.text._ZN7otl_cur4bindEiR7otl_variii[_ZN7otl_cur4bindEiR7otl_variii]+0xe5): undefined reference to `SQLBindCol'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::describe_column(otl_column_desc&, int, int&)':
otltest.cpp:(.text._ZN7otl_cur15describe_columnER15otl_column_desciRi[_ZN7otl_cur15describe_columnER15otl_column_desciRi]+0x49): undefined reference to `SQLNumResultCols'
otltest.cpp:(.text._ZN7otl_cur15describe_columnER15otl_column_desciRi[_ZN7otl_cur15describe_columnER15otl_column_desciRi]+0xf1): undefined reference to `SQLDescribeCol'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::error(otl_exc&)':
otltest.cpp:(.text._ZN7otl_cur5errorER7otl_exc[_ZN7otl_cur5errorER7otl_exc]+0x67): undefined reference to `SQLGetDiagRec'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_sel::close_select(otl_cur&)':
otltest.cpp:(.text._ZN7otl_sel12close_selectER7otl_cur[_ZN7otl_sel12close_selectER7otl_cur]+0x33): undefined reference to `SQLFreeStmt'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_sel::first(otl_cur&, int&, int&, int&, int&, int)':
otltest.cpp:(.text._ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i[_ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i]+0x52): undefined reference to `SQLSetStmtAttr'
otltest.cpp:(.text._ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i[_ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i]+0xb5): undefined reference to `SQLSetStmtAttr'
otltest.cpp:(.text._ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i[_ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i]+0x111): undefined reference to `SQLExecute'
otltest.cpp:(.text._ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i[_ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i]+0x16c): undefined reference to `SQLFetchScroll'
otltest.cpp:(.text._ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i[_ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i]+0x20e): undefined reference to `SQLFreeStmt'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_sel::next(otl_cur&, int&, int&, int&, int&, int)':
otltest.cpp:(.text._ZN7otl_sel4nextER7otl_curRiS2_S2_S2_i[_ZN7otl_sel4nextER7otl_curRiS2_S2_S2_i]+0x86): undefined reference to `SQLFreeStmt'
otltest.cpp:(.text._ZN7otl_sel4nextER7otl_curRiS2_S2_S2_i[_ZN7otl_sel4nextER7otl_curRiS2_S2_S2_i]+0xca): undefined reference to `SQLFetchScroll'
otltest.cpp:(.text._ZN7otl_sel4nextER7otl_curRiS2_S2_S2_i[_ZN7otl_sel4nextER7otl_curRiS2_S2_S2_i]+0x161): undefined reference to `SQLFreeStmt'
collect2: error: ld returned 1 exit status
make[2]: *** [otltest2] Error 1
make[1]: *** [CMakeFiles/otltest2.dir/all] Error 2
make: *** [all] Error 2
root@debian:/home/c2#

当

　　target_link_libraries(otltest2 libmyodbc5a.so) 
　　程序生成.

root@debian:/home/c2# make clean
root@debian:/home/c2# cmake .
-- Configuring done
-- Generating done
-- Build files have been written to: /home/c2
root@debian:/home/c2# make
-- Configuring done
-- Generating done
-- Build files have been written to: /home/c2
[100%] Building CXX object CMakeFiles/otltest2.dir/otltest.cpp.o
Linking CXX executable otltest2
[100%] Built target otltest2
root@debian:/home/c2#

前面说过

　　libmyodbc5w.so  是unicode 版本的.

　　libmyodbc5a.so 是ansi版本的.

当

target_link_libraries(otltest2 libmyodbc5w.so) 时出错,

otl_conn::rlogon(char const*, int) 说明 unicode 版本不能使用.

unicode 应该是 otl_conn::rlogon(wchar const*, int)

otl.h 中有个 OTL_UNICODE_EXCEPTION_AND_RLOGON 这个宏 ,有时间的朋友可以研究下说下方式.3Q.

root@debian:/home/c2# make
-- Configuring done
-- Generating done
-- Build files have been written to: /home/c2
[100%] Building CXX object CMakeFiles/otltest2.dir/otltest.cpp.o
Linking CXX executable otltest2
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_conn::rlogon(char const*, int)':
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x64c): undefined reference to `SQLSetConnectAttr'
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x67d): undefined reference to `SQLSetConnectAttr'
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x6eb): undefined reference to `SQLSetConnectAttr'
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x765): undefined reference to `SQLConnect'
otltest.cpp:(.text._ZN8otl_conn6rlogonEPKci[_ZN8otl_conn6rlogonEPKci]+0x85e): undefined reference to `SQLDriverConnect'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_conn::error(otl_exc&)':
otltest.cpp:(.text._ZN8otl_conn5errorER7otl_exc[_ZN8otl_conn5errorER7otl_exc]+0x67): undefined reference to `SQLGetDiagRec'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::open(otl_conn&)':
otltest.cpp:(.text._ZN7otl_cur4openER8otl_conn[_ZN7otl_cur4openER8otl_conn]+0xa7): undefined reference to `SQLSetStmtAttr'
otltest.cpp:(.text._ZN7otl_cur4openER8otl_conn[_ZN7otl_cur4openER8otl_conn]+0x100): undefined reference to `SQLSetStmtAttr'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::parse(char*)':
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x498): undefined reference to `SQLTables'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x520): undefined reference to `SQLStatistics'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x566): undefined reference to `SQLGetTypeInfo'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x604): undefined reference to `SQLColumns'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x67c): undefined reference to `SQLProcedures'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x71a): undefined reference to `SQLColumnPrivileges'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x792): undefined reference to `SQLTablePrivileges'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x80a): undefined reference to `SQLPrimaryKeys'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x8a8): undefined reference to `SQLProcedureColumns'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0x97e): undefined reference to `SQLForeignKeys'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0xa18): undefined reference to `SQLExecDirect'
otltest.cpp:(.text._ZN7otl_cur5parseEPc[_ZN7otl_cur5parseEPc]+0xc53): undefined reference to `SQLPrepare'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::exec(int, int, unsigned char)':
otltest.cpp:(.text._ZN7otl_cur4execEiih[_ZN7otl_cur4execEiih]+0x79): undefined reference to `SQLSetStmtAttr'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::describe_column(otl_column_desc&, int, int&)':
otltest.cpp:(.text._ZN7otl_cur15describe_columnER15otl_column_desciRi[_ZN7otl_cur15describe_columnER15otl_column_desciRi]+0xf1): undefined reference to `SQLDescribeCol'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_cur::error(otl_exc&)':
otltest.cpp:(.text._ZN7otl_cur5errorER7otl_exc[_ZN7otl_cur5errorER7otl_exc]+0x67): undefined reference to `SQLGetDiagRec'
CMakeFiles/otltest2.dir/otltest.cpp.o: In function `otl_sel::first(otl_cur&, int&, int&, int&, int&, int)':
otltest.cpp:(.text._ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i[_ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i]+0x52): undefined reference to `SQLSetStmtAttr'
otltest.cpp:(.text._ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i[_ZN7otl_sel5firstER7otl_curRiS2_S2_S2_i]+0xb5): undefined reference to `SQLSetStmtAttr'
collect2: error: ld returned 1 exit status
make[2]: *** [otltest2] Error 1
make[1]: *** [CMakeFiles/otltest2.dir/all] Error 2
make: *** [all] Error 2
root@debian:/home/c2#

但 unixodbc 的ini 配置文件

/usr/local/etc/odbcinst.ini 配置:

[mysqlodbc]　　　　　　#Section
Driver=/usr/local/lib/libmyodbc5w.so　　　　　　#libmyodbc5w.so 和libmyodbc5a.so的区别
SETUP=/usr/local/lib/libmyodbc5w.so
UsageCount=1

　　这儿配置 libmyodbc5w.so 和libmyodbc5a.so 都能正常访问.
 
　　运行 otltest2

root@debian:/home/c2# ./otltest2
hello
id=1
user=杩姣
name=灏3
id=2
user=rq
name=fasdf
id=3
user=灏寮?
name=xiaoZ

root@debian:/home/c2#

linux 下不能显示中文.

另一个程序可以在网页中显示:

至此在debian x64环境下通过C++ 的OTL库去访问mysql已经完成.

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debian C++ OTL库 用 unixodbc 连接 mysql 小记

环境

程序安装

配置unixodbc

通过OTL连接mysql

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debian C++ OTL库用 unixodbc 连接 mysql 小记

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