DB_DataObject : table alias in joined queries

This is a diff between the current release and a version with added table alias for use in joined queries. Anyone interested ? 255a256,261

    /**
     * The table alias
     **/
     var $_alias = '';

420c426

<             ' FROM ' . ($quoteIdentifiers ? $DB->quoteIdentifier($this->__table) : $this->__table) . " \n" .

---

            ' FROM ' . ($quoteIdentifiers ? $DB->quoteIdentifier($this->__table) : $this->__table) . ' '. $this->_alias . " \n" .

1517c1523,1525

<         $table   = ($quoteIdentifiers ? $DB->quoteIdentifier($this-
__table) : $this->__table);

---

        $tablen = $this->_alias ? $this->_alias:$this->__table;
        $table   = ($quoteIdentifiers ? $DB->quoteIdentifier($tablen) : $tablen);

        $tablefrom = ($quoteIdentifiers ? ($DB->quoteIdentifier($this->__table).' '.$DB->quoteIdentifier($this->_alias)) : ($this-__table.' '.$this->_alias));

1529c1537

<                 FROM $table {$t->_join} {$t->_query['condition']}");

---

                FROM $tablefrom  {$t->_join} {$t->_query['condition']}");

2427c2435 < ---

            $tablen = $this->_alias ? $this->_alias : $this->__table;

2429,2430c2437,2438

<                 ? ( $DB->quoteIdentifier($this->__table) . '.' . $DB->quoteIdentifier($k) )
<                 : "{$this->__table}.{$k}";

---

                ? ( $DB->quoteIdentifier($tablen) . '.' . $DB-quoteIdentifier($k) )
                : "{$tablen}.{$k}";

3156c3164

<         $table = $this->__table;

---

        $table = $this->_alias?$this->_alias:$this->__table;

3282c3290,3298

< ---

    /**
     * creates an table alias in the query
     * @param   string  the alias to use
     * @return  null
     **/
     function setAlias($alias) {
         $this->_alias = $alias;
     }