Snowflake Utils

This dbt package contains Snowflake-specific macros that can be (re)used across dbt projects.

Installation Instructions

Check dbt Hub for the latest installation instructions, or read the docs for more information on installing packages.

Prerequisites

Snowflake Utils is compatible with dbt 0.15.0 and later.

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Macros

snowflake_utils.warehouse_size() (source)

This macro returns an alternative warehouse if conditions are met. It will, in order, check the following conditions for incremental models:

• The relation doesn't exist (initial run) and a warehouse has been configured
• Full refresh run and a warehouse has been configured

Otherwise, it returns the target warehouse configured in the profile.

Usage

Call the macro from the snowflake_warehouse model configuration:

{{ 
    config(
      snowflake_warehouse=snowflake_utils.warehouse_size()
    )
}}

Macro Configuration

Out-of-the-box, the macro will return the target.warehouse for each condition, unless exceptions are configured using one or more of the following variables:

variable	information	required
snowflake_utils:initial_run_warehouse	Alternative warehouse when the relation doesn't exist	No
snowflake_utils:full_refresh_run_warehouse	Alternative warehouse when doing a --full-refresh	No

An example dbt_project.yml configuration:

# dbt_project.yml

...

models:
    my_project:
        vars:
            'snowflake_utils:initial_run_warehouse': "transforming_xl_wh"
            'snowflake_utils:full_refresh_run_warehouse': "transforming_xl_wh"

Console Output

When a variable is configured for a conditon and that condition is matched when executing a run, a log message will confirm which condition was matched and which warehouse is being used.

12:00:00 | Concurrency: 16 threads (target='dev')
12:00:00 | 
12:00:00 | 1 of 1 START incremental model DBT_MGUINDON.fct_orders... [RUN]
12:00:00 + Initial Run - Using warehouse TRANSFORMING_XL_WH

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Contributions

Contributions to this package are very welcome! Please create issues for bugs or feature requests, or open PRs against master.