- unfortunately calling upon "_label" here makes it unclear if we're trying to hit columns without names yet and such, to suit the bug right now just make it specific to FunctionElement
- unfortunately calling upon "_label" here makes it unclear if
we're trying to hit columns without names yet and such, to suit the bug
right now just make it specific to FunctionElement

(cherry picked from commit 785224a92f39bd5bdd05bbc66f4dd79736abded5)

graingert/sqlalchemy,j5int/sqlalchemy,sqlalchemy/sqlalchemy,zzzeek/sqlalchemy,sandan/sqlalchemy,monetate/sqlalchemy,monetate/sqlalchemy,bdupharm/sqlalchemy,graingert/sqlalchemy,robin900/sqlalchemy,bdupharm/sqlalchemy,wujuguang/sqlalchemy,robin900/sqlalchemy,sandan/sqlalchemy,j5int/sqlalchemy,wujuguang/sqlalchemy