Backtick sql bug when using filter transformer?

When trying to run a query like `query={users(filter:{id:"1"}){id,name}}` it yields the error in MySql:

``Column not found: 1054 Unknown column 'LOWER(id)' in 'where clause' (SQL: select * from `users` where `LOWER(id)` = 1)"``

shouldn't this be ``LOWER(`id`)``?

