/**
  * Retrieves the ID generated for an AUTO_INCREMENT column by the previous INSERT query.
  * @param  string     generator name
  * @return int|FALSE  int on success or FALSE on failure
  */
 public function getInsertId($sequence)
 {
     return ibase_gen_id($sequence, 0, $this->connection);
 }

 /**
  * Insert ID
  *
  * @param	string	$generator_name
  * @param	int	$inc_by
  * @return	int
  */
 public function insert_id($generator_name, $inc_by = 0)
 {
     //If a generator hasn't been used before it will return 0
     return ibase_gen_id('"' . $generator_name . '"', $inc_by);
 }

 /**
  * @brief 1씩 증가되는 sequence값을 return (firebird의 generator 값을 증가)
  **/
 function getNextSequence()
 {
     $gen = "GEN_" . $this->prefix . "sequence_ID";
     $sequence = ibase_gen_id($gen, 1);
     return $sequence;
 }

 public function insertId()
 {
     if (!empty($this->connect)) {
         return ibase_gen_id('id');
     } else {
         return false;
     }
 }

 function genid($tablename)
 {
     if ($this->debug) {
         echo "<pre style=\"color : green\">Getting a generator id from {$this->dbpath} <p style=\"color:purple;\"> {$tablename} </p></pre>";
     }
     switch ($this->dbtype) {
         /* Firebird Functionality */
         case "firebird":
             //write some things here
             $id = ibase_gen_id(strtoupper("GEN_" . $tablename . "_ID"), 1, $this->dbh);
             break;
             /* SQLite Functionality */
         /* SQLite Functionality */
         case "sqlite":
             //See how to get an autonumber from a table
             $exist = $this->fetch("select name from sqlite_master where type='table' and upper(name) = upper('{$tablename}')");
             if ($exist->NAME == "") {
                 $this->exec("create table cde_gen (id integer not null, tablename varchar (100) not null, primary key (id, tablename))");
             }
             $id = $this->fetch("select max(id) as maxid from cde_gen where upper(tablename) = upper('{$tablename}')");
             if ($id->MAXID == "") {
                 $newid = 0;
             } else {
                 $newid = $id->MAXID;
             }
             $newid++;
             $this->exec("insert into cde_gen (id, tablename) values ({$newid}, upper('{$tablename}'))");
             $this->commit();
             $id = $newid;
             break;
             /* Oracle Functionality */
         /* Oracle Functionality */
         case "oracle":
             //See how to get an autonumber from a table
             break;
     }
     return $id;
     if ($this->debug) {
         echo "<pre style=\"color : blue\">Getting a generator {$id} \n </pre>";
     }
 }

    protected function incrementaGenerator($nomeGenerator) {
	return ibase_gen_id($nomeGenerator, 1);
    }