In dbt, grants can be configured globally, at the project level, or directly inside a model using the config() function. When a grant is set in dbt_project.yml, it becomes a base definition, and individual models may extend (append to) or override that configuration.
According to dbt documentation, prefixing a grant with a plus sign (+) means “extend the list defined in higher-level configurations.”
Thus, if the project-level config already sets:
select: ['reporter']
…and a model needs to add an additional role (here, bi) without removing the existing one, the correct syntax is:
{{ config(grants = { '+select': ['bi'] }) }}
This tells dbt: “Take the existing grant list (reporter) and append bi to it.”
Option B is incorrect because '+bi' is not a valid grants syntax.
Option C is invalid because grants do not use an inherits parameter.
Option D is invalid because include: is not a grants configuration key.
Therefore, Option A correctly applies dbt’s documented merging behavior for grants.
