Raise exception when we have multiple values with an unknown column. Fixes #3666.
Raise exception when we have multiple values with an unknown column. Fixes #3666.

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