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with events as (
  select * from {{ref('events')}}
  {% if is_incremental() %}
    where event_timestamp >= (select max(event_timestamp)::date from {{this}})
  {% endif %}
)
--rest of model...

{{
    config(
        materialized='incremental',
        unique_key='date_day'
    )
}}

select
    date_trunc('day', event_at) as date_day,
    count(distinct user_id) as daily_active_users

from {{ ref('app_data_events') }}

{% if is_incremental() %}

  -- this filter will only be applied on an incremental run
  -- (uses >= to include records arriving later on the same day as the last run of this model)
  where date_day >= (select coalesce(max(date_day), '1900-01-01') from {{ this }})

{% endif %}

group by 1

dbt run --full-refresh --select my_incremental_model+

I probably want to avoid packages, but if you need codegen or utils, create a packages.yml file in the dir as the project yaml, and run dbt deps.

packages:
  - package: dbt-labs/codegen
    version: 0.10.0

Run dbt deps. And then here's the command line

dbt --quiet run-operation generate_source --args '{"table_names": ["orders"]}' > models/staging/jaffle_shop/_sources.yml