#include <iostream> #include <vector> #include <iterator> #include <string> #include <cstring> #include <cstdlib>
#define OTL_ODBC_XTG_IBASE6 // Compile OTL 4.0/XTG ODBC/Interbase
// #define OTL_ODBC_UNIX // uncomment this line if UnixODBC is used
#define OTL_STL // Turn on STL features
#define OTL_ANSI_CPP // Turn on ANSI C++ typecasts
#include <otlv4.h> // include the OTL 4.0 header file
using namespace std;
otl_connect db; // connect object
// row container class
class row{
public:
int f1;
string f2;
// default constructor
row(){f1=0;}
// destructor
~row(){}
// copy constructor
row(const row& row)
{
f1=row.f1;
f2=row.f2;
}
// assignment operator
row& operator=(const row& row)
{
f1=row.f1;
f2=row.f2;
return *this;
}
};
// redefined operator>> for reading row& from otl_stream
otl_stream& operator>>(otl_stream& s, row& row)
{
s>>row.f1>>row.f2;
return s;
}
// redefined operator<< for writing row& into otl_stream
otl_stream& operator<<(otl_stream& s, const row& row)
{
s<<row.f1<<row.f2;
return s;
}
// redefined operator<< writing row& into ostream
ostream& operator<<(ostream& s, const row& row)
{
s<<"f1="<<row.f1<<", f2="<<row.f2;
return s;
}
void insert()
// insert rows into table
{
otl_stream o(1, // buffer size should be == 1 on INSERT
"insert into test_tab values(:f1<int>,:f2<char[31]>)",
// INSERT statement
db // connect object
);
row r; // single row buffer
vector<row> vo; // vector of rows
// populate the vector
for(int i=1;i<=100;++i){
r.f1=i;
r.f2="NameXXX";
vo.push_back(r);
}
cout<<"vo.size="<<vo.size()<<endl;
// insert vector into table
copy(vo.begin(),
vo.end(),
otl_output_iterator<row>(o)
);
}
void select(const int af1)
{
otl_stream i(50, // buffer size may be > 1
"select * from test_tab "
"where f1 between :f11<int> and :f12<int>*2",
db // connect object
);
// create select stream
vector<row> v; // vector of rows
i<<af1<<af1; // enter :f11=8 and :f12=8 into the stream
// copy all rows to be fetched into the vector
copy(otl_input_iterator<row,ptrdiff_t>(i),
otl_input_iterator<row,ptrdiff_t>(),
back_inserter(v));
cout<<"Size="<<v.size()<<endl;
// send the vector to cout
copy(v.begin(), v.end(), ostream_iterator<row>(cout, "\n"));
}
int main()
{
otl_connect::otl_initialize(); // initialize ODBC environment
try{
db.rlogon("UID=scott;PWD=tiger;DSN=ib6sql"); // connect to ODBC
// db.rlogon("scott/tiger@ib6sql"); // connect to ODBC, alternative format
// of connect string
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
db.commit(); // committing the create table statement to to the database
insert(); // insert records into table
select(8); // 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 ODBC
return 0;
}
vo.size=100 Size=9 f1=8, f2=NameXXX f1=9, f2=NameXXX f1=10, f2=NameXXX f1=11, f2=NameXXX f1=12, f2=NameXXX f1=13, f2=NameXXX f1=14, f2=NameXXX f1=15, f2=NameXXX f1=16, f2=NameXXX
Copyright © 1996, 2001, Sergei Kuchin, email: [email protected], [email protected].
Permission to use, copy, modify and redistribute this document for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies.