OTL 4.0, Example 721 (Oracle 10.2 and higher, char[XXX] and LONGs, combined with the bulk interface (stream buffer size>1))

This example demonstrates INSERT and SELECT statements with the char[XXX] bind variable data type and LONGs, combined with the bulk interface (stream buffer size >1).

Source Code

#include <iostream>
using namespace std;

#include <stdio.h>

#define OTL_ORA7 // Compile OTL 4.0/OCI7
#include <otlv4.h> // include the OTL 4.0 header file

otl_connect db; // connect object

void insert()
// insert rows into table
{ 
 otl_stream o(10, // buffer size
              "insert into test_tab values(:f1<int>,:f2<char[200001]>)",
                 // SQL statement
              db // connect object
             );
 char f2[200001];
 for(int i=1;i<=20;++i){
  for(int j=0;j<199999;++j)
   f2[j]='*';
  f2[199999]='?';
  f2[200000]=0;
  o<<i<<f2;
 }

}

void select()
{ 
 otl_stream i(10, // buffer size
              "select f1, f2 :#2<char[200001]> from test_tab "
// override f2's default data type "LONG" with char[XXX] so that the bulk interface
// can be used efficiently
              "where f1>=:f11<int> and f1<=:f12<int>*2",
                 // SELECT statement
              db // connect object
             ); 
   // create select stream
 
 int f1;
 char f2[200001];

 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="<<f2[0]<<f2[strlen(f2)-1]<<", len="<<strlen(f2)<<endl;
 }

}

int main()
{
 otl_connect::otl_initialize(); // initialize the database API 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 long)"
    );  // 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=4, f2=*?, len=200000
f1=5, f2=*?, len=200000
f1=6, f2=*?, len=200000
f1=7, f2=*?, len=200000
f1=8, f2=*?, len=200000

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