clippy::used_underscore_binding

[whatisaphone]

The query! macro can trigger clippy::used_underscore_binding due to this variable which is used a few lines later (clippy doesn't care about the if false {}). It could be fixed by renaming _expr to expr

[abonander]

I think without the underscore I was getting unused warnings even with the method call, but it's worth a shot. This would be pretty easy to try.

[RhnSharma]

I would like to take this one.