Domain based on another domain

Query 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.

Query type:

Problem detection (Each row in the result could represent a flaw in the design)

Query reliability:

Medium (Medium number of false-positive results)

Query license:

MIT License

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:

Click on query to copy it

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 for generating SQL statements that help us to fix the problem

SQL query	Description
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

Description

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 where the query belongs to

Collection name	Collection description
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 .

Collection name

Collection description

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 .

Categories where the query belongs to

Category name	Category description
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.

Category name

Category description

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.