PrestaShop/PrestaShop — pull request #1795 by CIMEOS (2014-05-19 09:36:52+00:00)
Title: [-] BO : Fixed bug #PSCFV-8895 - Cart rules query problem

Performance optimisation for slow query to get combinaison of cart
rules. Issues PSCFV-8895.
Replace left join with union clause in query.