protected function column_alias_sql(Column $column, \ebi\Q $q, $alias = true)
{
$column_str = $alias ? $column->table_alias() . '.' . $this->quotation($column->column()) : $this->quotation($column->column());
if ($q->ignore_case()) {
return 'upper(' . $column_str . ')';
}
return $column_str;
}