Goal Find domains that have been defined based on another domain. Do not specify domains based on existing domains. This would unnecessarily increase dependencies and complexity.
Type Problem detection (Each row in the result could represent a flaw in the design)
Reliability Medium (Medium number of false-positive results)
License MIT (opens in new tab)
Fixing Suggestion Drop the depending domain and recreate it so that it references to a base type not to a domain.
Data Source INFORMATION_SCHEMA+system catalog
SQL Query 
SELECT n.nspname AS domain_schema, t.typname AS domain_name, n_base.nspname AS base_domain_schema, t_base.typname AS base_domain_name
FROM pg_catalog.pg_type t INNER JOIN pg_catalog.pg_namespace n ON t.typnamespace=n.oid
INNER JOIN pg_catalog.pg_type t_base ON t.typbasetype=t_base.oid
INNER JOIN pg_catalog.pg_namespace n_base ON t_base.typnamespace=n_base.oid
WHERE t.typtype='d'  AND t_base.typtype='d'
AND n.nspname NOT IN (SELECT schema_name
FROM INFORMATION_SCHEMA.schemata
WHERE schema_name<>'public' AND
schema_owner='postgres' AND schema_name IS NOT NULL)
ORDER BY domain_schema, domain_name;

SQL statements that help generate fixes for the identified problem.

Fix Action #1
SELECT format('DROP DOMAIN %1$I.%2$I;', n.nspname, t.typname) AS statements
FROM pg_catalog.pg_type t INNER JOIN pg_catalog.pg_namespace n ON t.typnamespace=n.oid
INNER JOIN pg_catalog.pg_type t_base ON t.typbasetype=t_base.oid
WHERE t.typtype='d'  AND t_base.typtype='d'
AND n.nspname NOT IN (SELECT schema_name
FROM INFORMATION_SCHEMA.schemata
WHERE schema_name<>'public' AND
schema_owner='postgres' AND schema_name IS NOT NULL)
ORDER BY n.nspname, t.typname;

Drop the depending domain.

SQL Query to Generate FixDescription
SELECT format('DROP DOMAIN %1$I.%2$I;', n.nspname, t.typname) AS statements
FROM pg_catalog.pg_type t INNER JOIN pg_catalog.pg_namespace n ON t.typnamespace=n.oid
INNER JOIN pg_catalog.pg_type t_base ON t.typbasetype=t_base.oid
WHERE t.typtype='d'  AND t_base.typtype='d'
AND n.nspname NOT IN (SELECT schema_name
FROM INFORMATION_SCHEMA.schemata
WHERE schema_name<>'public' AND
schema_owner='postgres' AND schema_name IS NOT NULL)
ORDER BY n.nspname, t.typname;
Drop the depending domain.

Collections

This query belongs to the following collections:

Find problems automatically

Queries, that results point to problems in the database. Each query in the collection produces an initial assessment. However, a human reviewer has the final say as to whether there is a problem or not .

NameDescription
Find problems automaticallyQueries, that results point to problems in the database. Each query in the collection produces an initial assessment. However, a human reviewer has the final say as to whether there is a problem or not .

Categories

This query is classified under the following categories:

Comfortability of database evolution

Queries of this category provide information about the means that influence database evolution.

Domains

Queries of this category provide information about reusable specifications of column properties.

NameDescription
Comfortability of database evolutionQueries of this category provide information about the means that influence database evolution.
DomainsQueries of this category provide information about reusable specifications of column properties.