[Feature] Support `--empty` flag for snapshots

d-cole commented 3 months ago

Is this your first time submitting a feature request?

[X] I have read the expectations for open source contributors
[X] I have searched the existing issues, and I could not find an existing issue for this feature
[X] I am requesting a straightforward extension of existing dbt functionality, rather than a Big Idea better suited to a discussion

Describe the feature

Support the empty flag for snapshots. Currently, dbt snapshot --empty results in the error: "Error: No such option: --empty Did you mean --help?". This means unit tests for models downstream of snapshots cannot run with the usual workflow.

Describe alternatives you've considered

Running upstreams of snapshots with --empty then running the snapshots. This makes configuring unit tests in CI much more complex as you need the additional steps:

Identify snapshots upstream of modified models
Run upstreams of snapshots as empty
Run snapshots

Who will this benefit?

Users of unit tests and snapshots

Are you interested in contributing this feature?

No response

Anything else?

No response

dbeatty10 commented 2 months ago

Thanks for opening this @d-cole !

We've got something similar open for seeds as well: https://github.com/dbt-labs/dbt-core/issues/8981

We've added your issue for snapshots to https://github.com/dbt-labs/dbt-core/issues/10151.

d-cole commented 2 months ago

Great, thank you @dbeatty10!

dbt-labs / dbt-core