[Go] RecordReader has no way to propagate errors

[lidavidm]

Describe the enhancement requested

RecordReader's methods don't return err, so there's no way to propagate errors. For this reason, exported streams in the C Data Interface have no way of returning errors, either.

Changing the interface would of course be a breaking change. The alternative is to declare this:

type ClosableRecordReader interface {
        RecordReader
        Closable
}

which gives us one place to report errors (at the end).

Component(s)

Go

[zeroshade]

At this point we might as well add the Err() error method to the array.RecordReader interface, this would allow us to potentially bring the ipc.Reader to be an array.RecordReader also without sacrificing the ability to retrieve errors.