otoceni podminky JOIN do stejne tabulky

Zapasim s chybnym pripojenim stejne tabulky.

$data->joinWhere(":commodity","commodity.commodity_id = :commodity.id");

kde vysledny sql je

LEFT JOIN `commodity` `commodity_ref` ON `commodity`.`id` = `commodity_ref`.`commodity_id` AND
(`commodity`.`commodity_id` = `commodity_ref`.`id`)

Diky za pomoc ;)