SqliteConnection::query_row should return formal error type if there is no row to return

[dashed]

The following error return isn't all that useful: https://github.com/jgallagher/rusqlite/blob/7586556db5b4ad4db94e5e6ab5232f8868b8f5c9/src/lib.rs#L299-L302

And capturing the error through string comparison message isn't a good solution.

I think it may be useful to have error types that can be externally captured via rusqlite as a library.

This may require SqliteError to be an enum or something.

[jgallagher]

@dashed Continuing with the "better late than never" theme, I have a local branch that does indeed change SqliteError to an enum. It sprouted several more cases than I was expecting, where we were (ab)using SQLite error codes for errors occurring on the Rust side. The change is relatively minor but quite widespread, so I'm going to wait for the currently-open PRs to get finished and merged in. This is coming soon though!

[dashed]

Awesome to hear! 👍 I'm definitely looking forward to seeing this on master.

[jgallagher]

@dashed merged into master. Please give it a shot and let me know if there are any issues!