protected function columnLoaderArray($columns)
{
foreach ($columns as $column) {
if (is_array($column)) {
if (count($column) > 1) {
$this->columns[] = "{$column['0']} AS {$column['1']}";
} else {
$this->columns[] = $column[0];
}
} else {
$this->columns[] = $column;
}
}
}