# OTL 4.0, Example 348 (Simple Unicode Insert/Select and VARCHAR strings)

This example demonstrates a simple Unicode INSERT, SELECT and constant SQL statements.

## Source Code

    #include <iostream>
    using namespace std;

    #include <stdio.h>

    #define OTL_ODBC_POSTGRESQL // Compile OTL 4.0/ODBC
    #define OTL_UNICODE // Enable Unicode OTL for ODBC
    #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[5]>)",
                     // SQL statement, char[5] means 5 2-byte
                     // Unicode charatcters including a null
                     // terminator
                  db // connect object
                 );

     unsigned short tmp[32]; // Null terminated Unicode character array.

     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
      o<<(unsigned char*)tmp;
       // 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.
     }

    }

    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;
     unsigned short f2[32];

     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>>(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.
      cout<<"f1="<<f1<<", f2=";
       for(int j=0;f2[j]!=0;++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>>(unsigned char*)f2;
      cout<<"f1="<<f1<<", f2=";
       for(int j=0;f2[j]!=0;++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 varchar(4))"
        );  // create table
       db.commit();
      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, 2007, Sergei Kuchin, email: skuchin@ispwest.com, skuchin@gmail.com
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