7d98135084
There was a bug in the "INSTANCE OF" operator as described in https://groups.google.com/forum/#!topic/doctrine-user/B8raq8CNMgg "INSTANCE OF" was not taking into account subclasses. It was merely translating the class to its discriminator. This is not correct since the class can have subtypes and those are, indeed, still instance of the superclass. Also, classes may not have a discriminator (e.g. abstract classes). This commit also provides useful tests to avoid regression.
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Doctrine 2 is an object-relational mapper (ORM) for PHP 7.0+ 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 Hibernate's HQL. This provides developers with a powerful alternative to SQL that maintains flexibility without requiring unnecessary code duplication.