otl에서 오라클 프로시져 호출

otl_stream o;
try{ 
  o.open(1, // buffer size should be equal to 1 in case of stored procedure call 
         "begin PROC_CERT_VALIDATION(:V_DN<char[4000],in>,:V_CERTSTAT<char[33],out> ); end;",
          dbconn// connect object 
         ); 

    o.set_commit(0); 
    o<<pszDN; 

    char pszStat[32]; 
    o>>pszStat; 

   if (memcmp(pszStat,"GOOD",4)==0) nResult=0;
   else nResult = -1;
   o.close();
  
   return 0;
 
 }
 catch( otl_exception &p )
 {
  ///< intercept OTL exceptions
  printf("%s",p.msg);
 }

 // failed
 o.close();