error[E0053]: method `execute` has an incompatible type for trait
  --> <source>:15:98
   |
15 |     fn execute(context: &Context, stmt: &Stmt, maxrows: i64, args: Vec<String>, urgency: i32) -> Result<Box<Row>, E> {
   |                                                                                                  ^^^^^^^^^^^^^^^^^^^
   |                                                                                                  |
   |                                                                                                  expected struct `Row`, found struct `Box`
   |                                                                                                  help: change the output type to match the trait: `Result<Row, E>`
   |
note: type in trait
  --> <source>:9:98
   |
9  |     fn execute(context: &Context, stmt: &Stmt, maxrows: i64, args: Vec<String>, urgency: i32) -> Result<Row, E>;
   |                                                                                                  ^^^^^^^^^^^^^^
   = note: expected fn pointer `fn(&Context, &Stmt, _, Vec<_>, _) -> Result<Row, _>`
              found fn pointer `fn(&Context, &Stmt, _, Vec<_>, _) -> Result<Box<Row>, _>`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0053`.
Compiler returned: 1

have Execute(context.Context, sql.Stmt, int, []sql.NamedArg, int) (*Result, error)
want Execute(context.Context, sql.Stmt, int, []sql.NamedArg, int) (Result, error)