domains

domains

The domains view provides information about all domains defined in Lunar. Domains represent logical groupings of components that share similar characteristics or purposes.

Schema

Column	Type	Description
name	TEXT	The identifier for the domain in hierarchical dotted format (e.g. payments.checkout)
description	TEXT	A description of the domain
owner	TEXT	The owner of the domain
meta	JSONB	Arbitrary metadata associated with the domain

Notes

• Domains are defined primarily in the Lunar configuration but can also come from catalogers

• Domains can be used to organize and categorize components

• Components can be assigned to specific domains to create logical groupings

• Domains can be hierarchical, with a parent-child relationship represented by a dotted notation. For example, in the domain name auth.sso.providers, auth is the parent domain of auth.sso, and auth.sso is the parent domain of auth.sso.providers. The full domain name is stored in the name column using dotted notation.

Usage examples

List all domains in the system:

SELECT *
FROM domains
ORDER BY name;

Find domains owned by a specific person or team:

SELECT *
FROM domains
WHERE owner = '[e-mail]';

Get a count of components by domain:

SELECT 
  d.name AS domain_name,
  COUNT(c.name) AS component_count
FROM domains d
LEFT JOIN components c ON c.domain = d.name
GROUP BY d.name
ORDER BY component_count DESC;

Find all subdomains of a specific parent domain:

SELECT *
FROM domains
WHERE name LIKE 'payments.%'
ORDER BY name;

Find the direct subdomains of a specific domain (only one level down):

SELECT *
FROM domains
WHERE name LIKE 'payments.%'
  AND name NOT LIKE 'payments.%.%'
ORDER BY name;