CancelToken for long running queries

[naim94a]

Hi!,
I'm new to diesel, it looks awesome.
I would like to use diesel in a project where queries may take a long time to complete, but if the client disconnects - I would like to cancel the query. AFAIK, tokio-postgres won't signal the server to cancel a query if the future is dropped. tokio-postgres provides a token that can be used to attempt to terminate an ongoing query via the cancel_token function.
Is it possible to access cancel_token somehow before executing a query?

Thanks!

[weiznich]

This functionality is currently not exposed by diesel-async. I would accept a PR adding this. It should include documentation and a small test.

[naim94a]

Cool, I have submitted PR #58.