Implementing RowsColumnScanner allows the driver
to completely control how values are scanned.
Fixes#67546
Change-Id: Id8e7c3a973479c9665e4476fe2d29e1255aee687
GitHub-Last-Rev: ed0cacaec4
GitHub-Pull-Request: golang/go#67648
Reviewed-on: https://go-review.googlesource.com/c/go/+/588435
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Sean Liao <sean@liao.dev>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
