#include <iostream>
using namespace std;
#include <stdio.h>
#define OTL_ORA8I // Compile OTL 4.0/OCI8i
//#define OTL_ORA9I // Compile OTL 4.0/OCI9i
//#define OTL_ORA10G // Compile OTL 4.0/OCI10g
#define OTL_UNICODE // Enable Unicode OTL for OCI8i
#include <otlv4.h> // include the OTL 4.0 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<int>,:f2<char[31]>,:f3<nchar[31]>)",
// SQL statement
db // connect object
);
char tmp[32];
unsigned short tmp2[31]; // Null terminated Unicode character array.
for(int i=1;i<=100;++i){
sprintf(tmp,"Name%d",i);
unsigned short* c2=tmp2;
char* c1=tmp;
// Unicode's first 128 characters are ASCII (0..127), so
// all is needed for converting ASCII into Unicode is as follows:
while(*c1){
*c2=(unsigned char)*c1;
++c1; ++c2;
}
*c2=0; // target Unicode string is null terminated,
// only the null terminator is a two-byte character,
// not one-byte
o<<i;
o<<(unsigned char*)tmp2;
// overloaded operator<<(const unsigned char*) in the case of Unicode
// OTL accepts a pointer to a Unicode character array.
// operator<<(const unsigned short*) wasn't overloaded
// in order to avoid ambiguity in C++ type casting.
o<<(unsigned char*)tmp2;
}
}
void select()
{
otl_stream i(50, // buffer size
"select "
" f1, f2, "
" f3 :#3<nchar[31]> "
// override the default mapping of f3 (from char[])
// to nchar[]
"from test_tab "
"where f1>=:f<int> "
" and f1<=:f*2",
// SELECT statement
db // connect object
);
// create select stream
int f1;
unsigned short f2[31];
unsigned short f3[31];
i<<4; // assigning :f = 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;
i>>(unsigned char*)f2;
// overloaded operator>>(unsigned char*) in the case of Unicode
// OTL accepts a pointer to a Unicode chracter array.
// operator>>(unsigned short*) wasn't overloaded
// in order to avoid ambiguity in C++ type casting.
i>>(unsigned char*)f3;
cout<<"f1="<<f1<<", f2=";
// Unicode's first 128 characters are ASCII, so in order
// to convert Unicode back to ASCII all is needed is
// as follows:
for(int j=0;f2[j]!=0;++j){
cout<<(char)f2[j];
}
cout<<", f3=";
for(int j2=0;f3[j2]!=0;++j2){
cout<<(char)f2[j2];
}
cout<<endl;
}
}
int main()
{
otl_connect::otl_initialize(); // initialize OCI environment
try{
db.rlogon("scott/tiger"); // connect to Oracle
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 number, f2 varchar2(60), f3 nvarchar2(60))"
); // 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 Oracle
return 0;
}
f1=4, f2=Name4, f3=Name4
f1=5, f2=Name5, f3=Name5
f1=6, f2=Name6, f3=Name6
f1=7, f2=Name7, f3=Name7
f1=8, f2=Name8, f3=Name8
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.