recce 0.1.0.dev0

Environment diff tool for dbt

recce

recce is a environment diff tool for dbt

Features

1. Support the same dbt adapter framework as dbt.
2. Support both Web UI & CLI
3. Lineage diff

Use cases

1. When developing, we can check the new result by comparing against the production one.
2. When reviewing PR, you can understand the change impacts.
3. When trouble shooting, you can run adhoc dif query to find the root causes.

Usage

Prerequisites

You have to have at least two environments in your dbt project. For example, one is for developing and another is for production. You can prepare two targets with separate schemas in you dbt profile. Here is profiles.yml example

jaffle_shop:
  target: dev
  outputs:
    dev:
      type: duckdb
      path: jaffle_shop.duckdb
      schema: dev
    prod:
      type: duckdb
      path: jaffle_shop.duckdb
      schema: main

Getting Started

1. Installation

   git clone [e-mail]:InfuseAI/recce.git
   cd recce
   pip install -e .
   

2. Put the manifest.json of production (or any environment you would like to diff) in the target-base/ folder. manifest.json is one of the generated artifacts for each dbt command execution. You can find it in target/ folder by default.

3. Develop your awesome features

   dbt run
   

4. Run the recce command

   recce server
   

5. Review the linage diff.

6. Switch to query tab, Write and run a query

   select * from {{ ref('mymodel') }}
   

   where ref is a Jinja macro to reference a model name.

Under the hood, recce uses the manifest.json under target/ and target-base/ to geenrate query and execute.

Run Query Diff

You can either run in Web UI

recce server

or run in CLI

recce diff --sql 'select * from {{ ref('mymodel') }}'

Specify the primary key columns

In the query diff, we use primary key columns as the basis for identifying the same record on both sides.

There are two ways to specify the primary key

1. Define in the SQL: Add the config macro in your sql.

   {{
      config( primary_key=['DATE_WEEK', 'COUNTRY'])
   }}
   
   select ...
   

2. Select in the query result: In the Web UI, you can click the key icons in the column headers to toggle if a column is a primary key.

Q&A

Q: How recce connect to my data warehouse? Does recce support my data warehouse?

recce use the dbt adapter to connect to your warehouse. So it should work for your data warehouse.

Q: What credential does recce connect to the two environments?

Recce uses the same target in the profile to connect your warehouse. If you use the default target dev, it use the credentials to connect to both environments. So please make sure that the credential able to access both environments.