honor dataset-impl option

[mgaido91]

Before submitting

• [ ] Was this discussed/approved via a Github issue? (no need for typos, doc improvements)
• [ ] Did you read the contributor guideline?
• [ ] Did you make sure to update the docs?
• [ ] Did you write any new necessary tests?

What does this PR do?

Fixes # (issue).

PR review

Anyone in the community is free to review the PR once the tests have passed. If we didn't discuss your PR in Github issues there's a high chance it will not be merged.

Did you have fun?

Make sure you had fun coding 🙃

[mgaido91]

cc @yuntang

[yuntang]

It looks good to me!