dbt-date-spines

name	dbt-date-spines
description	Fix current_date/now() hazards in dbt date spine models. Replaces nondeterministic date references with data-driven boundaries from get_date_boundaries.
type	skill

dbt Date Spine Hazard — Fixing current_date in Model Files

When This Applies

• dbt_project_map reports "WARNING: Models use current_date"
• dbt run produces far more rows than expected in a date-spine model

These are pre-shipped model SQL files in models/ — you have direct write access. For general date spine syntax, see duckdb-sql skill section 2.

Fix Pattern

Edit the model SQL directly. Replace current_date/current_timestamp/now() with a data-driven endpoint — a subquery from the primary fact table:

-- Before:  ... CURRENT_DATE ...
-- After:   ... (SELECT MAX(order_date) FROM {{ ref('stg_orders') }}) ...

Use the fact table with the most rows, or the one referenced in the task instruction.

Package Model Override

If the flagged file is in dbt_packages/ (marked "PACKAGE MODEL" in the warning):

1. Read the full SQL from the package model file
2. Create models/<same_filename>.sql — dbt prioritizes local models over package models
3. Paste the entire package SQL into the new file and replace current_date with the data-driven endpoint
4. Add {{ config(materialized='table') }} at the top

Example: if dbt_packages/shopify_source/models/stg_shopify__order.sql uses current_date:

-- models/stg_shopify__order.sql  (local override — copy ENTIRE package SQL here)
{{ config(materialized='table') }}
-- Replace current_date with a data-driven endpoint:
-- (SELECT MAX(order_date) FROM {{ ref('stg_orders') }})

Do NOT edit files inside dbt_packages/ directly — dbt deps will overwrite your changes.

Finding the Right Date

Call mcp__signalpilot__get_date_boundaries(connection_name="<id>"). Use the primary fact table's max date (marked "USE THIS"). Never use the global max — dimension tables often have later dates.

Verification

dbt run --select <model_name>

SELECT MIN(date_col), MAX(date_col), COUNT(*) FROM <model_name>

The spine's max date must match the source data's endpoint, not today's date.