Oracle FAQ Your Portal to the Oracle Knowledge Grid
HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US
 

Home -> Community -> Usenet -> c.d.o.misc -> Announcement: One-page C++ Oracle API

Announcement: One-page C++ Oracle API

From: Sergei Kuchin <skuchin_at_sprynet.com>
Date: Wed, 19 Aug 1998 21:09:38 -0500
Message-ID: <35DB8561.2F0D@sprynet.com> 





Hi All,



I'd like to introduce the Oracle Call Interface Template Library
(OTL), Version 2.0.0. OTL provides incredibly simple (see for
yourself!) and powerful C++ Oracle API (see examples below) via the
SQL stream.  It works with both native OCI7 and native OCI8. Also, it
has STL-compliant (http://www.sgi.com/Technology/STL/Iterators.html)
iterators that bring the power of generic programming to Oracle
applications developers. OTL is a Freeware package.



Take a closer look at:



     http://home.sprynet.com/sprynet/skuchin/otl_1pg.htm




Feel free to contact me at skuchin_at_sprynet.com



Thank you,


Sergei Kuchin






  Source code


                              


#include <iostream.h>


#include <stdio.h>


#include <otl.h>





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;


 }


} /* insert */



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
 


 int f1;


 char f2[31];



 i<<8; // assigning :f = 8


   // SELECT automatically executes when all input variables are
   // assigned. First portion of out 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 re-executes when all input variables are
   // assigned. First portion of out rows is fetched to the buffer



 while(!i.eof()){ // while not end-of-data
  i>>f1>>f2;


  cout<<"f1="<<f1<<", f2="<<f2<<endl;


 }



} /* select */



int main()


{


 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
 }



 db.logoff(); // disconnect from Oracle



 return 0;



} /* main */




  Output




f1=8, f2=Name8
f1=9, f2=Name9
f1=10, f2=Name10
f1=11, f2=Name11
f1=12, f2=Name12
f1=13, f2=Name13
f1=14, f2=Name14
f1=15, f2=Name15
f1=16, f2=Name16
f1=4, f2=Name4
f1=5, f2=Name5
f1=6, f2=Name6
f1=7, f2=Name7
f1=8, f2=Name8

=============== EXAMPLE 2 (with PL/SQL block) ========================





  Source code





#include <iostream.h>


#include <stdio.h>


#include <otl.h>





otl_connect db; // connect object



void plsql()


// invoking PL/SQL block


{ 


 otl_stream o(5, // buffer size

	      "begin "
	      " :A<int,inout> := :A+1; "
	      " :B<char[31],out> := :C<char[31],in>; "
	      "end;",
	         // PL/SQL block
	      db // connect object
	     );
 o<<1<<"Test String1"; // assigning :A = 1, :C = "Test String1"


 o<<2<<"Test String2"; // assigning :A = 2, :C = "Test String2"
 o<<3<<"Test String3"; // assigning :A = 3, :C = "Test String3"



 o.flush(); // executing PL/SQL block 3 times



 int a;


 char b[32];



 while(!o.eof()){ // not end-of-data


  o>>a>>b;


  cout<<"A="<<a<<", B="<<b<<endl;


 }



} /* plsql */



int main()


{


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


  db.rlogon("scott/tiger"); // connect to Oracle
  plsql(); // invoking PL/SQL block


 }


 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
 }


 db.logoff(); // disconnect from Oracle
 return 0;


} /* main */



  Output




A=2, B=Test String1
A=3, B=Test String2
A=4, B=Test String3








  Source code





#include <iostream.h>


#include <stdio.h>


#include <otl.h>





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
	     );




 char tmp[32];



 for(int i=1;i<=100;++i){


  sprintf(tmp,"Name%d",i);


  o.printf("%d %s",i,tmp); // write one row into stream
 }


} /* insert */



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
 


 int f1;


 char f2[31];



 i<<8; // assigning :f = 8


   // SELECT automatically executes when all input variables are
   // assigned. First portion of out rows is fetched to the buffer



 while(!i.eof()){ // while not end-of-data
  i.scanf("%d %s",&f1,f2); // read one row from stream
  cout<<"f1="<<f1<<", f2="<<f2<<endl;


 }
 


 i<<4; // assigning :f = 4


   // SELECT automatically re-executes when all input variables are
   // assigned. First portion of out rows is fetched to the buffer



 while(!i.eof()){ // while not end-of-data
  i.scanf("%d %s",&f1,f2); // read one row from stream
  cout<<"f1="<<f1<<", f2="<<f2<<endl;


 }



} /* select */



int main()


{


 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
 }



 db.logoff(); // disconnect from Oracle



 return 0;



} /* main */



  Output




f1=8, f2=Name8
f1=9, f2=Name9
f1=10, f2=Name10
f1=11, f2=Name11
f1=12, f2=Name12
f1=13, f2=Name13
f1=14, f2=Name14
f1=15, f2=Name15
f1=16, f2=Name16
f1=4, f2=Name4
f1=5, f2=Name5
f1=6, f2=Name6
f1=7, f2=Name7
f1=8, f2=Name8








  Source code





#include <iostream.h>


#include <stdio.h>


#include <otl.h>





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;


 }


} /* insert */



void select()


{ 


 otl_stream i(50, // buffer size

	      "begin "
              " open :cur for "
              "  select * "
              "  from test_tab "
              "  where f1>=:f<int> and f1<=:f*2; "
              "end;", 
	         // PL/SQL block returns a referenced cursor
	      db, // connect object
              ":cur" // referenced cursor placeholder name
	     ); 




   // create select stream
 


 int f1;


 char f2[31];



 i<<8; // assigning :f = 8


   // SELECT automatically executes when all input variables are
   // assigned. First portion of out 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 re-executes when all input variables are
   // assigned. First portion of out rows is fetched to the buffer



 while(!i.eof()){ // while not end-of-data
  i>>f1>>f2;


  cout<<"f1="<<f1<<", f2="<<f2<<endl;


 }



} /* select */



int main()


{


 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
 }



 db.logoff(); // disconnect from Oracle



 return 0;



} /* main */



  Output




f1=8, f2=Name8
f1=9, f2=Name9
f1=10, f2=Name10
f1=11, f2=Name11
f1=12, f2=Name12
f1=13, f2=Name13
f1=14, f2=Name14
f1=15, f2=Name15
f1=16, f2=Name16
f1=4, f2=Name4
f1=5, f2=Name5
f1=6, f2=Name6
f1=7, f2=Name7
f1=8, f2=Name8


Received on Wed Aug 19 1998 - 21:09:38 CDT












Original text of this message













  HOME |
  ASK QUESTION |
  ADD INFO |
  SEARCH |
  E-MAIL US