OTL 4.0, Example 354 (Unicode NVARCHAR2 Insert/Select and #define OTL_UNICODE_STRING_TYPE)

Source Code

#include <iostream>
#include <string>
using namespace std;

#include <stdio.h>

#define OTL_ORA9I // Compile OTL 4.0/OCI9i
//#define OTL_ORA10G
//#define OTL_ORA10G_R2

#define OTL_UNICODE // Enable Unicode OTL for OCI9i

#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
{ 
 otl_stream o(50, // buffer size
              "insert into test_tab values(:f1<int>,:f2<nchar[5]>)", 
                 // SQL statement, char[5] means 5 2-byte 
                 // Unicode charatcters including a null
                 // terminator
              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()
{ 
 otl_stream i(50, // buffer size
              "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"); // 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 nvarchar2(4))"
    );  // 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;

}

Output

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

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