doctrine2 - Syntax error with execute a query with one to one -

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i have 2 entities:

  1. user entity 2 fields are: id (@id), username
  2. profile entity 2 fields are: user(@onetoone,targetentity="user"), fullname

but when make query try things read jpa book:

select p profile p p.user.username = 'john'

it alerts me message:

[syntax error] line 0, col 55: error: expected =, <, <=, <>, >, >=, !=, got '.'

as of current ebnf, syntax used invalid in doctrine 2 orm. have join related entity following:

select     p     profile p join     p.user u     u.username = :username

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