function GetForeignKeys($table)
    {
        $sql = new Sql\Builder($this);
        $fields = array('TABLE_SCHEMA', 'TABLE_NAME', 'REFERENCED_COLUMN_NAME', 'CONSTRAINT_NAME');
        
        $tbl = $sql->Table('information_schema.key_column_usage', $fields);
        
        $where = $sql->Equals($tbl->Field('TABLE_SCHEMA'), $sql->Value($this->dbName))->
                And_($sql->Equals($tbl->Field('TABLE_NAME'), $sql->Value($table)))->
                And_($sql->IsNotNull($tbl->Field('REFERENCED_COLUMN_NAME')));
        $what = $sql->SelectList($tbl->Field('CONSTRAINT_NAME'));
        
        
        $select = $sql->Select(true, $what, $tbl, $where);
        $result = array();
        $reader = $this->ExecuteQuery((string)$select);
        while ($reader->Read())
        {
            $result[] = $reader->ByIndex(0);
        }
        return $result;
    }