5506d7adce
When some dql contains a subselect with expression in parenthesis, the expression of the $simpleSelectExpression parameter given to walkSimpleSelectExpression is an instance of AST\ParenthesisExpression. Before this commit, this case defaulted to $this->walkEntityIdentificationVariable($expr) where $expr is supposed to be a string. A fatal error was then yielded.
Doctrine 2 ORM
Master: 
2.3: 
2.2: 
2.1: 
Master: 
Doctrine 2 is an object-relational mapper (ORM) for PHP 5.3.2+ 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.