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[Feature] Add unix-style fqn wildcard selector method #6599
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LGTM, thank you!
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Hey @z3z1ma Thanks for this amazing PR that provide a powerful feature! Great work think through which selector methods should support wildcards!
I want to make sure I understand the exact function you are adding here.
For existing selector, the following now support wildcard( the rest are more status based so they don't need to support wildcard match)
FQN
Tag
Source
Exposure
Metric
File
Package
TestName
And added a new one Wildcard
.
After playing with it a bit I have some question/ask
-
FQN selector support everything Wildcard selector support, plus special logic to the following possible. Is that correct? Is they anything that the wildcard support that the new FQN doesn't supports? If not should we consider just leave the new
FQN
, or remove wildcard match fromFQN
and add the newwildcard
selector method, whichever feels more consistent with other selector methods.dbt-core/test/unit/test_graph_selector_methods.py
Lines 659 to 660 in 60fde4d
assert search_manifest_using_method( manifest, method, 'pkg.unions') == {'union_model', 'mynamespace.union_model'} -
Do you mind add some new test to the tests for those selectors that supports wildcard match? For example, for test_select_tag maybe we can add something like
assert search_manifest_using_method(manifest, method, 'uses_eph*') == { 'view_model', 'table_model'}
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Only because this change is super powerful, I would like us to think a bit more about is there any concern of the this fnmatch would cause the
- additional things got selected for user's existing selection command?(@z3z1ma @aranke you two probably know the use case better than I do)
- performance issue of selector on large projects (@jtcohen6 should we test this on some large size testing project before merging?) (EDIT: Thinking again this shouldn't have performance issue on existing selection. Might be slow for new selection that uses wildcard.)
The We should definitely keep the wildcard matching capabilities on FQN because, as the default selector, it is significantly more accessible to users. Furthermore, existing use of the
Unless a user has Can elucidate more tomorrow (new comment or will edit this one), but do expect a commit that drops |
@z3z1ma Thanks for the fast response!! This makes sense to me!! I was asking the third question only out of cautious not that I think the answer would be no. |
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Mentioned updates are complete.
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Looks great! Thanks @z3z1ma !
Updates wildcard selection documentation (added in #3130), based on the implementation we actually ended up with: - #2702 (comment) - dbt-labs/dbt-core#6599 Crucially, there is no standalone `wildcard:` method, but rather support for unix-style wildcards in a number of existing methods. See Alex's comment (linked above) above for details. --------- Co-authored-by: Doug Beatty <[email protected]>
resolves #3549 ## What are you changing in this pull request and why? This PR adds the (undocumented!) `resource_type` method that has been possible for a long, long time. Reason: we discovered a selection method wasn't documented! So we did 😎 ## Not done #3549 mentions that there are no examples for the wildcard method that include `wildcard:`. This seems okay since the intent in dbt-labs/dbt-core#6599 was to use Unix-style wildcards in conjunction with all the other selection methods. So we're choosing not to add `wildcard:` examples in this PR. If needed, they can always be added later. ## 🎩 [Preview](https://deploy-preview-3548--docs-getdbt-com.netlify.app/reference/node-selection/methods#the-resource_type-method) <img width="550" alt="image" src="https://github.com/dbt-labs/docs.getdbt.com/assets/44704949/c46f18c5-d4ea-4e9a-815d-7f682efa4ee2"> ## Checklist - [x] Review the [Content style guide](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/content-style-guide.md) and [About versioning](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/single-sourcing-content.md#adding-a-new-version) so my content adheres to these guidelines. --------- Co-authored-by: mirnawong1 <[email protected]> Co-authored-by: Doug Beatty <[email protected]>
resolves #6598
Description
Adds a new selector method plus tests. This method is called wildcard. It uses fnmatch from the python stdlib.
Reference here
We look at the fqn as a string:
project.resource.some.dir.my_model
project.resource.some.dir.schema_file.dbt_utils_expression_is_true_my_model_column_a
And simply use fnmatch to determine if it is selected:
Here's a convoluted example just to show how flexible and robust you can imagine this being:
dbt test -s 'wildcard:project.*.*.dir.schema_file.*_column_a
Also you can see the tests as a reference for playing with it if you want to continue imagining what it opens up.
Checklist
changie new
to create a changelog entry