OTL 4.0, Example 491 (UTF8, VARCHAR2, and otl_refcur_stream)

Source Code

#include <iostream>
using namespace std;

#include <stdio.h>
#define OTL_ORA9I // Compile OTL 4.0/OCI9i
#define OTL_ORA_UTF8 // Enable UTF8 OTL for OCI9i
#include <otlv4.h> // include the OTL 4.0 header file

// Sample UTF8 based string
unsigned char utf8_sample[]=
{0x61,0x62,0x63,0xd0,0x9e,0xd0,0x9b,0xd0,
0xac,0xd0,0x93,0xd0,0x90,0x0};

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]>)", 
                 // SQL statement
              db // connect object
             );
 unsigned char tmp[31];

 for(int i=1;i<=100;++i){
strcpy(reinterpret_cast<char*>(tmp),reinterpret_cast<const char*>(utf8_sample));
  o<<i;
  o<<tmp; 
 }

}

void select()

 otl_stream i(1, // buffer size
              "begin "
              " open :cur<refcur,out[50]> for "
     // :cur is a bind variable name, refcur -- its type, 
     // out -- output parameter, 50 -- the buffer size when this
     // reference cursor will be attached to otl_refcur_stream
              "  select * "
              "  from test_tab "
              "  where f1>=:f<int,in> and f1<=:f*2; "
              "end;", // PL/SQL block returns a referenced cursor
              db // connect object
             ); 
   // create select stream with referenced cursor

  i.set_commit(0); // set stream "auto-commit" to OFF.
 
 int f1;
 unsigned char f2[31];

 otl_refcur_stream s; // reference cursor stream for reading rows.

 i<<8; // assigning :f = 8
 i>>s; // initializing the refrence cursor stream with the output 
       // reference cursor.

 while(!s.eof()){ // while not end-of-data
  s>>f1;
  s>>f2;
  cout<<"f1="<<f1<<", f2=";
  for(int j=0;f2[j]!=0;++j)
printf("%2x ", f2[j]);
  cout<<endl;
 }

 s.close(); // closing the reference cursor

 i<<4; // assigning :f = 4
 i>>s;

 while(!s.eof()){ // while not end-of-data
  s>>f1;
  s>>f2;
  cout<<"f1="<<f1<<", f2=";
  for(int j=0;f2[j]!=0;++j)
printf("%2x ", f2[j]);
  cout<<endl;
 }
 // there is no need to explicitly calls s.close() since s's destructor 
 // will take care of closing the stream
}

int main()
{
putenv(const_cast<char*>("NLS_LANG=.AL32UTF8")); // set your Oracle Client NLS_LANG
// if its default was set to something else

 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(30))"
    );  // 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;

}

Output

f1=8, f2=61 62 63 d0 9e d0 9b d0 ac d0 93 d0 90
f1=9, f2=61 62 63 d0 9e d0 9b d0 ac d0 93 d0 90
f1=10, f2=61 62 63 d0 9e d0 9b d0 ac d0 93 d0 90
f1=11, f2=61 62 63 d0 9e d0 9b d0 ac d0 93 d0 90
f1=12, f2=61 62 63 d0 9e d0 9b d0 ac d0 93 d0 90
f1=13, f2=61 62 63 d0 9e d0 9b d0 ac d0 93 d0 90
f1=14, f2=61 62 63 d0 9e d0 9b d0 ac d0 93 d0 90
f1=15, f2=61 62 63 d0 9e d0 9b d0 ac d0 93 d0 90
f1=16, f2=61 62 63 d0 9e d0 9b d0 ac d0 93 d0 90
f1=4, f2=61 62 63 d0 9e d0 9b d0 ac d0 93 d0 90
f1=5, f2=61 62 63 d0 9e d0 9b d0 ac d0 93 d0 90
f1=6, f2=61 62 63 d0 9e d0 9b d0 ac d0 93 d0 90
f1=7, f2=61 62 63 d0 9e d0 9b d0 ac d0 93 d0 90
f1=8, f2=61 62 63 d0 9e d0 9b d0 ac d0 93 d0 90


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Copyright © 1996-2017, Sergei Kuchin, email: skuchin@gmail.com, skuchin@gmail.com .

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