#include <iostream.h> #include <stdio.h>
#define OTL_ODBC // Compile OTL 4.0/ODBC
// #define OTL_ODBC_UNIX // uncomment this line if UnixODBC is used
#include <otlv4.h> // include the OTL 4.0 header file
otl_connect db; // connect object
void insert(void)
// insert rows into table
{
otl_long_string f2(7000); // define long string variable
db.set_max_long_size(7000); // set maximum long string size for connect object
otl_stream o(1, // buffer size needs to be set to 1
"insert into test_tab values(:f1<int>,:f2<varchar_long>)",
// INSERT statement
db // connect object
);
for(int i=1;i<=10;++i){
for(int j=0;j<5000;++j)
f2[j]='*';
f2[5000]='?';
f2.set_len(5001);
o<<i<<f2;
}
}
void select(void)
{
otl_long_string f2(7000); // define long string variable
db.set_max_long_size(7000); // set maximum long string size for connect object
otl_stream i(1, // buffer size needs to be set to 1 in case of TEXT columns
"select * from test_tab",
// SELECT statement
db // connect object
);
// create select stream
int f1;
while(!i.eof()){ // while not end-of-data
i>>f1>>f2;
cout<<"f1="<<f1<<", f2="<<f2[0]<<f2[f2.len()-1]<<", len="<<f2.len()<<endl;
}
}
int main()
{
otl_connect::otl_initialize(); // initialize ODBC environment
try{
db.rlogon("UID=scott;PWD=tiger;DSN=postgresql"); // connect to ODBC
// db.rlogon("scott/tiger@postgresql"); // 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 text)"
); // 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 ODBC
return 0;
}
f1=1, f2=*?, len=50001 f1=2, f2=*?, len=50001 f1=3, f2=*?, len=50001 f1=4, f2=*?, len=50001 f1=5, f2=*?, len=50001 f1=6, f2=*?, len=50001 f1=7, f2=*?, len=50001 f1=8, f2=*?, len=50001 f1=9, f2=*?, len=50001 f1=10, f2=*?, len=50001
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.