OTL 4.0, Example 370 (LONG VARCHAR Unicode Insert/Select and #define OTL_UNICODE_STRING_TYPE)

Source Code

#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@sapdbsql2"); // 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 long varchar unicode)"
    );  // 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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Copyright © 1996-2017, Sergei Kuchin, email: skuchin@gmail.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. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.