Domains are reusable artifacts. By associating a domain with a sequence generator, one essentially starts to share sequence generators between tables. It may cause a potential performance bottleneck by having a shared resource. By having a shared sequence it is not possible to change properties of sequences of different tables independently, i.e., it increases coupling between tables.
Notes
In case of the string_agg function, the line break (br) tag is used as a part of the separator for the better readability in case the query result is displayed in a web browser.
Type
Problem detection (Each row in the result could represent a flaw in the design)
Do not associate a sequence generator with a domain. Use for each table a separate sequence generator.
Data Source
INFORMATION_SCHEMA only
SQL Query
SELECT domain_schema, domain_name , domain_default, string_agg(table_schema || '.' || table_name || '.' || column_name, '; ' ORDER BY table_schema, table_name) AS columns
FROM information_schema.columns c
RIGHT JOIN information_schema.domains d USING (domain_schema, domain_name)
INNER JOIN information_schema.schemata s
ON d.domain_schema=s.schema_name
WHERE d.domain_default ILIKE '%nextval%'
AND (d.domain_schema = 'public'
OR s.schema_owner<>'postgres')
GROUP BY domain_schema, domain_name , domain_default
ORDER BY domain_schema, domain_name;
Collections
This query belongs to the following collections:
Name
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
This query is classified under the following categories:
Name
Description
Comfortability of data management
Queries of this category provide information about the means that have been used to make the use or management of database more comfortable and thus, more efficient.
Default value
Queries of this catergory provide information about the use of default values.
Domains
Queries of this category provide information about reusable specifications of column properties.
Performance
Queries of this category provide information about indexes in a database.
Sequence generators
Queries of this category provide information about sequence generators and their usage.