2653d735e2
Previously it was sufficient to use the old parser result for a Query if the DQL didn't change (Query::STATE_CLEAN), but now there must also be no changes to the filter collection of the EntityManager. In the old situation each Query object would create a hash of all the filter objects on it's own. That was not very efficient. This commit adds the state of the current filter collection to the EntityManager. The state will be set to FILTERS_STATE_DIRTY as a filter is enabled, removed or a parameter is set on a filter. The hash is also computed by the EntityManager, but only if the filter collection is dirty. This will prevent recalculation of the hash with each query.
Doctrine 2 ORM
Doctrine 2 is an object-relational mapper (ORM) for PHP 5.3.0+ that provides transparent persistence for PHP objects. It sits on top of a powerful database abstraction layer (DBAL). One of its key features is the option to write database queries in a proprietary object oriented SQL dialect called Doctrine Query Language (DQL), inspired by Hibernates HQL. This provides developers with a powerful alternative to SQL that maintains flexibility without requiring unnecessary code duplication.
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