persist_docs

• Models
• Sources
• Seeds
• Snapshots

dbt_project.yml

models:
  <resource-path>:
    +persist_docs:
      relation: true
      columns: true

models/<modelname>.sql

{{ config(
  persist_docs={"relation": true, "columns": true}
) }}

select ...

Definition

Optionally persist resource descriptions as column and relation comments in the database. By default, documentation persistence is disabled, but it can be enabled for specific resources or groups of resources as needed.

▶Changelog

Support

The persist_docs config is supported on all core dbt plugins: BigQuery, Redshift, Snowflake, and Postgres. Some databases impose limitations on the types of descriptions that can be added to database objects. At present, the persist_docs flag has the following known limitations:

• Column-level comments are not supported on Snowflake views

Usage

Documenting columns and relations

Supply a description for a model:

models/schema.yml

version: 2

models:
  - name: dim_customers
    description: One record per customer
    columns:
      - name: customer_id
        description: Primary key

Enable persist_docs for columns and relations in your project:

dbt_project.yml

models:
  +persist_docs:
    relation: true
    columns: true

Run dbt and observe that the created relation and columns are annotated with your descriptions:

Relation descriptions in BigQuery

Column descriptions in BigQuery