#include <iostream>
#include <string>
using namespace std;
#include <stdio.h>
#define OTL_ODBC // Compile OTL 4.0/ODBC
#define OTL_UNICODE // Enable Unicode OTL
#if defined(__GNUC__)
namespace std{
typedef unsigned short unicode_char;
typedef basic_string<unicode_char> unicode_string;
}
#define OTL_UNICODE_CHAR_TYPE unicode_char
#define OTL_UNICODE_STRING_TYPE unicode_string
#else
#define OTL_UNICODE_CHAR_TYPE wchar_t
#define OTL_UNICODE_STRING_TYPE wstring
#endif
#include <otlv4.h> // include the OTL 4.0 header file
otl_connect db; // connect object
void insert()
// insert rows into table
{
db.set_max_long_size(5); // max size + 1 Unicode character for traling NULL
otl_stream o(50,
"insert into test_tab values(:f1<int>,:f2<varchar_long>)",
db // connect object
);
OTL_UNICODE_CHAR_TYPE tmp[5];
OTL_UNICODE_STRING_TYPE tmp2;
for(int i=1;i<=100;++i){
o<<i;
tmp[0]=1111; // Unicode character (decimal code of 1111)
tmp[1]=2222; // Unicode character (decimal code of 2222)
tmp[2]=3333; // Unicode chracater (decimal code of 3333)
tmp[3]=4444; // Unicode chracater (decimal code of 4444)
tmp[4]=0; // Unicode null terminator
tmp2=tmp;
o<<tmp2;
}
}
void select()
{
db.set_max_long_size(5); // max size + 1 Unicode character for traling NULL
otl_stream i(50, // buffer size can be > 1
"select * from test_tab "
"where f1>=:f11<int> "
" and f1<=:f12<int>*2",
// SELECT statement
db // connect object
);
// create select stream
int f1;
OTL_UNICODE_STRING_TYPE f2;
i<<8<<8; // assigning :f11 = 8, f12 = 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;
i>>f2;
cout<<"f1="<<f1<<", f2=";
for(size_t j=0;j<f2.length();++j)
cout<<" "<<f2[j];
cout<<endl;
}
i<<4<<4; // assigning :f11 = 4, :f12 = 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=";
for(size_t j=0;j<f2.length();++j)
cout<<" "<<f2[j];
cout<<endl;
}
}
int main()
{
otl_connect::otl_initialize(); // initialize the database API environment
try{
db.rlogon("scott/tiger@postgresql2"); // connect to the database
otl_cursor::direct_exec
(
db,
"drop table test_tab",
otl_exception::disabled // disable OTL exceptions
); // drop table
db.commit();
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.var_info<<endl; // print out the variable that caused the error
}
db.logoff(); // disconnect from the database
return 0;
}
f1=8, f2= 1111 2222 3333 4444
f1=9, f2= 1111 2222 3333 4444
f1=10, f2= 1111 2222 3333 4444
f1=11, f2= 1111 2222 3333 4444
f1=12, f2= 1111 2222 3333 4444
f1=13, f2= 1111 2222 3333 4444
f1=14, f2= 1111 2222 3333 4444
f1=15, f2= 1111 2222 3333 4444
f1=16, f2= 1111 2222 3333 4444
f1=4, f2= 1111 2222 3333 4444
f1=5, f2= 1111 2222 3333 4444
f1=6, f2= 1111 2222 3333 4444
f1=7, f2= 1111 2222 3333 4444
f1=8, f2= 1111 2222 3333 4444
Copyright © 1996, 2007, Sergei Kuchin, email: skuchin@ispwest.com, skuchin@gmail.com .
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.