/**
* Returns an instance of a TableSelect object.
*
* @param string|array|Expr $columns
* @return TableSelect
*/
public static function selectCol($columns = null)
{
$select = new TableSelect(get_called_class());
$select->from(static::$_name, $columns === null ? Select::SQL_WILDCARD : $columns, static::$_schema);
return $select;
}
