# OTL 4.0, Example 439 (Stream buffer size as int, simple Insert/Select)

This example demonstrates OTL stream's new int buffer size in a simple INSERT, SELECT and constant SQL statements.

## Source Code

    #include <iostream>
    using namespace std;

    #include <stdio.h>

    #define OTL_ODBC_UNIX // Compile OTL 4.0/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(80000, // buffer size
                  "insert into test_tab values(:f1<int>,:f2<char[31]>)",
                     // SQL statement
                  db // connect object
                 );
     char tmp[32];

     for(int i=1;i<=100000;++i){
      sprintf(tmp,"Name%d",i);
      o<<i<<tmp;
     }
    }

    void select()
    {
     otl_stream i(50000, // buffer size
                  "select * from test_tab where f1>=:f11<int> and f1<=:f12<int>",
                     // SELECT statement
                  db // connect object
                 );
       // create select stream

     float f1;
     char f2[31];

     i<<80000<<80008;
       // 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="<<f2<<endl;
     }

    }

    int main()
    {
     otl_connect::otl_initialize(); // initialize the database API environment
     try{

      db.rlogon("scott/tigger@sybsql"); // connect to the database

      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 int, f2 varchar(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 the database

     return 0;

    }

## Output

    f1=32800, f2=Name32800
    f1=32801, f2=Name32801
    f1=32802, f2=Name32802
    f1=32803, f2=Name32803
    f1=32804, f2=Name32804
    f1=32805, f2=Name32805
    f1=32806, f2=Name32806
    f1=32807, f2=Name32807
    f1=32808, f2=Name32808

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Copyright © 1996, 2007, Sergei Kuchin, email: skuchin@ispwest.com, skuchin@gmail.com/a>.

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.