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The --empty flag #4966

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merged 5 commits into from
Feb 26, 2024
Merged

The --empty flag #4966

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31a8cb4
The empty flag
matthewshaver Feb 21, 2024
89f6e05
Adding migration guide info
matthewshaver Feb 21, 2024
d409f95
Apply suggestions from code review
matthewshaver Feb 26, 2024
ba63507
Merge branch 'current' into empty
mirnawong1 Feb 26, 2024
e644caa
Update website/docs/docs/dbt-versions/core-upgrade/01-upgrading-to-v1…
matthewshaver Feb 26, 2024
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7 changes: 6 additions & 1 deletion website/docs/docs/dbt-versions/core-upgrade/01-upgrading-to-v1.8.md
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Expand Up @@ -28,7 +28,12 @@ dbt Labs is committed to providing backward compatibility for all versions 1.x,

## New and changed features and functionality

Coming soon!
Features and functionality new in dbt v1.8

### The `--empty` flag

The [`run`](/reference/commands/run#the-`--empty`-flag) and [`build`](/reference/commands/run#the-`--empty`-flag) commands now support the `--empty` flag for building schema-only dry runs. The `--empty` flag limits the refs and sources to zero rows. dbt will build the project and models, parse the files to identify changes, but won't actually execute the SQL against the target data warehouse. This ensures your models will build properly and validates dependencies.
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dbt will build the project and models, parse the files to identify changes, but won't actually execute the SQL against the target data warehouse.

I don't think this is technically correct. Perhaps:
"dbt will still execute the model SQL against the target data warehouse, but will avoid expensive reads of input data. This ensures your models will build properly and validates dependencies."

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## Quick hits

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8 changes: 8 additions & 0 deletions website/docs/reference/commands/build.md
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Expand Up @@ -25,6 +25,14 @@ In DAG order, for selected resources or an entire project.

**Flags:** The `build` task supports all the same flags as `run`, `test`, `snapshot`, and `seed`. For flags that are shared between multiple tasks (e.g. `--full-refresh`), `build` will use the same value for all selected resource types (e.g. both models and seeds will be full refreshed).

<VersionBlock firstVersion="1.8">

### The `--empty` flag

The `build` command supports the `--empty` flag for building schema-only dry runs. The `--empty` flag limits the refs and sources to zero rows. dbt will build the project and models, parse the files to identify changes, but won't actually execute the SQL against the target data warehouse. This ensures your models will build properly and validates dependencies.
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</VersionBlock>

### Examples

```
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8 changes: 8 additions & 0 deletions website/docs/reference/commands/run.md
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Expand Up @@ -80,3 +80,11 @@ See [global configs](/reference/global-configs/failing-fast)
## Enable or Disable Colorized Logs

See [global configs](/reference/global-configs/print-output#print-color)

<VersionBlock firstVersion="1.8">

## The `--empty` flag

The `run` command supports the `--empty` flag for building schema-only dry runs. The `--empty` flag limits the refs and sources to zero rows. dbt will build the project and models, parse the files to identify changes, but won't actually execute the SQL against the target data warehouse. This ensures your models will build properly and validates dependencies.
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</VersionBlock>
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