This example demonstrates #define OTL_UNCAUGHT_EXCEPTION_ON. See also problem 46. This example definitely does NOT work with VC++ 6.0. In Windows, it can be compiled with Borland C++ 5.5. or GNU C++, or any other C++ compiler which supports the ANSI C++ bool uncaught_exception() function.
#include <iostream>
using namespace std;
#include <stdio.h>
#define OTL_ODBC_MSSQL_2005 // Compile OTL 4/ODBC, MS SQL 2005
#define OTL_FREETDS_ODBC_WORKAROUNDS // Enable the FreeTDS / ODBC workarounds for MS SQL
//#define OTL_ODBC // Compile OTL 4/ODBC. Uncomment this when used with MS SQL 7.0/ 2000
//#define OTL_ODBC_UNIX // Compile OTL 4 / ODBC. Uncomment this when used in Linux / Unix
#define OTL_STL // enable STL / ANSI C++ compliance.
#define OTL_UNCAUGHT_EXCEPTION_ON // enable safe exception handling / error
// recovery.
#include <otlv4.h> // include the OTL 4.0 header file
otl_connect db; // connect object
void insert()
// insert rows into table
{
otl_stream o(10, // buffer size
"insert into test_tab values(:f1<int>,:f2<char[31]>)",
// SQL statement
db // connect object
);
o.set_commit(0); // turning off the stream's autocommit flag
char tmp[32];
for(int i=1;i<=100;++i){
sprintf(tmp,"Name%d",i);
o<<i;
if(i==17)
throw "Making a little trouble in the middle of the INSERT...";
o<<tmp;
}
o.flush(); // flushing the stream's buffer
db.commit(); // committing the changes to the database
}
int main()
{
otl_connect::otl_initialize(); // initialize ODBC environment
try{
db.rlogon("scott/tiger@freetds_mssql"); // connect to MS SQL Server
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
}
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 info.
cerr<<p.var_info<<endl; // print out the variable that caused the error
db.rollback(); // roll back transaction
}
catch(const char* msg){
cerr<<msg<<endl; // print out the message
db.rollback(); // roll back transaction
}
db.logoff(); // disconnect from MS SQL Server
return 0;
}
Making a little trouble in the middle of the INSERT...
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