We don't handle or verify the order of the columns

[sgrif]

We need to test for this. For example, if we have

table! {
  users {
    id -> Serial,
    name -> VarChar,
    email -> VarChar,
  }
}

There's nothing to prevent

let source = users.select((id, email, name));
connection.query_all::<User>(&source)

which would read the fields into the wrong pieces of the struct. The obvious solution is to access by the name of the fields, but then we have to figure out more concrete aliasing behavior and couple to it which I don't want. Needs further investigation.

[sgrif]

This can also potentially lead to memory unsafety if the table is declared with the right columns, but in a different order than they exist in the schema, causing the wrong types to be applied and potentially breaking some invariant of the output.

[sgrif]

Fixed by 4ebd0c1