Confusing error message

julia> data = @from t in train begin
           @where t.item_nbr == 1 
           @select t
       end
0x6 query result
id │ date │ store_nbr │ item_nbr │ unit_sales │ onpromotion
───┼──────┼───────────┼──────────┼────────────┼────────────

julia> data = @from t in train begin
           @where t.item_nbr == 1 
       end
ERROR: MethodError: no method matching @from(::Expr)
Closest candidates are:
  @from(::Expr, ::Expr) at /home/jamie/.julia/v0.6/Query/src/Query.jl:39

It seems that every query requires a select, but the error message doesn't tell you that.

Start in Query/src/Query.jl at the @from definitions around line 39, and reproduce the query that omits @select. Make the resulting error explain that every query requires a select clause, then verify that the reported message is clearer for this example.