/**
* Compose GROUP BY expression for boolean field
*
* @param array $layout_def
* @return string
*/
public function queryGroupBy($layout_def)
{
$db = $this->reporter->db;
// explicitly cast NULL to empty value which depends on field type for proper grouping
$alias = parent::queryGroupBy($layout_def);
$alias = $db->convert($alias, 'IFNULL', array($db->emptyValue($layout_def['type'])));
return $alias;
}
function queryGroupBy($layout_def)
{
// i guess qualifier and column_function are the same..
if (!empty($layout_def['qualifier'])) {
$func_name = 'queryGroupBy' . $layout_def['qualifier'];
if (method_exists($this, $func_name)) {
return $this->{$func_name}($layout_def) . " \n";
}
}
return parent::queryGroupBy($layout_def) . " \n";
}
