terminate called after throwing an instance of 'otl_tmpl_exception<otl_exc, otl_
#include <iostream>
using namespace std;
#include <stdio.h>

#define OTL_ODBC // Compile OTL 4/ODBC
#include <otlv4.h> // include the OTL 4 header file

otl_connect db; // connect object

void insert()
// insert rows into table
{
otl_stream o(50, // buffer size
"insert into test_tab values(:f1<float>,:f2<char[31]>)",
// SQL statement
db // connect object
);
char tmp[32];

for(int i=1;i<=100;++i){
#if defined(_MSC_VER)
#if (_MSC_VER >= 1400) // VC++ 8.0 or higher
sprintf_s(tmp,sizeof(tmp),"Name%d",i);
#else
sprintf(tmp,"Name%d",i);
#endif
#else
sprintf(tmp,"Name%d",i);
#endif
o<<static_cast<float>(i)<<tmp;
}
}

void select()
{
otl_stream i(50, // buffer size
"select * from test_tab where f1>=:f<int> and f1<=:ff<int>*2",
// SELECT statement
db // connect object
);
// create select stream

float f1;
char f2[31];

i<<8<<8; // assigning :f = 8; :ff = 8
// SELECT automatically executes when all input variables are
// assigned. First portion of output rows is fetched to the buffer

while(!i.eof()){ // while not end-of-data
i>>f1>>f2;
cout<<"f1="<<f1<<", f2="<<f2<<endl;
}

i<<4<<4; // assigning :f = 4, :ff = 4
// SELECT automatically executes when all input variables are
// assigned. First portion of output rows is fetched to the buffer

while(!i.eof()){ // while not end-of-data
i>>f1>>f2;
cout<<"f1="<<f1<<", f2="<<f2<<endl;
}

}

int main()
{
otl_connect::otl_initialize(); // initialize ODBC environment
try{

db.rlogon("UID=scott;PWD=tiger;DSN=my_db"); // connect to ODBC

otl_cursor::direct_exec
(
db,
"drop table test_tab",
otl_exception::disabled // disable OTL exceptions
); // drop table

otl_cursor::direct_exec
(
db,
"create table test_tab(f1 int, f2 varchar(30))"
); // create table

insert(); // insert records into table
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.sqlstate<<endl; // print out SQLSTATE message
cerr<<p.var_info<<endl; // print out the variable that caused the error
}

db.logoff(); // disconnect from Oracle

return 0;

}


#g++ ex21_odbc.cpp -lodbc

#./a.out
出现如下错误：
[unixODBC][Driver Manager]Data source name not found, and no default driver specified

IM002

terminate called after throwing an instance of 'otl_tmpl_exception<otl_exc, otl_conn, otl_cur>'
已放弃


------解决方案--------------------

不是，是sqlserver


已经解决了，在mian里面修改db.rlogon("DSN=my_db；UID=sa;PWD=tiger"，1)
如果去掉后面db.rlogon 中的1还是出现上面的问题。
[解决办法]
第二参数设置为1.表示数据库事务自动提交；
设置为0，表示数据库事务非自动提交。