Add methods to get affected rows instead of their count

[PhenX]

May be an alternative to #29 but could not find an way to make it work on MySQL.

[timaiv]

I think we need CancellationToken token = default parameter for RunAndReturnAsync method.

[vaclavholusa]

could not find an way to make it work on MySQL.

Will this work? https://stackoverflow.com/a/16592867/2284302

@artiomchi Do you think it's possible to somehow merge this PR even with the MySQL exlusion? This is indeed higly needed feature.

Or maybe release some forked version with output support for mssql?

[larsmaehlum]

could not find an way to make it work on MySQL.

Will this work? https://stackoverflow.com/a/16592867/2284302

@artiomchi Do you think it's possible to somehow merge this PR even with the MySQL exlusion? This is indeed higly needed feature.

Or maybe release some forked version with output support for mssql?

Would love for this to either be merged in without MySQL support or released as an addon library if feasible.
Throwing an exception if used on MySQL until a way to implement support would still be better than not having this feature for any database.

[PhenX]

Hello, any news on this @artiomchi ?