ex58_oci7_proc.pcc

there are OTL exampless,it s a good examples

#include <iostream.h>
#include <stdio.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#define OTL_ORA7
#include <otlv32.h> // include the OTL 3.2 header file

EXEC SQL INCLUDE SQLCA;
typedef char CSTR[256];

EXEC SQL BEGIN DECLARE SECTION;
  EXEC SQL TYPE CSTR IS STRING(256);
  CSTR UserId;
EXEC SQL END DECLARE SECTION;

void sqlerror(void)
{
 EXEC SQL WHENEVER SQLERROR CONTINUE;
 fprintf(stderr,"\n%s\n",sqlca.sqlerrm.sqlerrmc);
 EXEC SQL ROLLBACK RELEASE;
 exit(1);
}
EXEC SQL WHENEVER SQLERROR DO sqlerror();

otl_connect db; // connect object

void insert()
// insert rows into table
{ 
 otl_stream o(50, // buffer size
              "insert into test_tab values(:f1<float>,:f2<char[31]>)", 
                 // SQL statement
              db // connect object
             );
 char tmp[32];

 for(int i=1;i<=100;++i){
  sprintf(tmp,"Name%d",i);
  o<<(float)i<<tmp;
 }
}

void select()
{ 
 otl_stream i(50, // buffer size
              "select * from test_tab where f1>=:f<int> and f1<=:f*2",
                 // SELECT statement
              db // connect object
             ); 
   // create select stream
 
 float f1;
 char f2[31];

 i<<8; // assigning :f = 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>>f2;
  cout<<"f1="<<f1<<", f2="<<f2<<endl;
 }

 i<<4; // assigning :f = 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<<endl;
 }

}

int main()
{

 Lda_Def lda; // OCI7's LDA structure

 strcpy(UserId,"scott/tiger");
 EXEC SQL CONNECT :UserId; // connect to Oracle (primary connection)
 sqllda(&lda); // get an OCI7 formatted lda from the Pro*C/C++ 
               // primary connection

 otl_connect::otl_initialize(); // initialize OCI environment
 try{

  db.rlogon(&lda); // attach to the primary Pro*C/C++ connection

  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(); // detach from the primary Pro*C/C++ connection

 EXEC SQL COMMIT RELEASE;


 return 0;

}