/**
* appends sql to given select statement
*
* @param Zend_Db_Select $_select
* @param Tinebase_Backend_Sql_Abstract $_backend
* @throws Tinebase_Exception_NotFound
*/
public function appendFilterSql($_select, $_backend)
{
$this->_options['ignoreAcl'] = TRUE;
$this->_resolve();
$quotedDisplayContainerIdentifier = $_backend->getAdapter()->quoteIdentifier('attendee.displaycontainer_id');
$where = empty($this->_containerIds) ? Tinebase_Backend_Sql_Command::getFalseValue($_backend->getAdapter()) : $_select->getAdapter()->quoteInto($this->_getQuotedFieldName($_backend) . ' IN (?)', $this->_containerIds);
$orWhere = empty($this->_containerIds) ? Tinebase_Backend_Sql_Command::getFalseValue($_backend->getAdapter()) : $_select->getAdapter()->quoteInto($quotedDisplayContainerIdentifier . ' IN (?)', $this->_containerIds);
$_select->where($where);
$_select->orWhere($orWhere);
}