Names of constraints (directly connected to a base table) that do not contain the table name

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Goal Find constraints that are perhaps badly named. Table names help us to ensure the uniqueness of the names within a schema and make the names more expressive and user-friendly.
Notes The query considers only locally-defined constraints, i.e., constraints that are not inherited. The query considers a possibility that underscores (_) in the table name have been removed from the constraint/index name.
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 License
Fixing Suggestion Use the table name in the constraint names and index names. A problem is that by default a PostgreSQL identifier may be at most 63 bytes long. Thus, in case of long table names one may have to shorten the name in the constraint or index names. It is important to do this consistently. Do not shorten the table name.
Data Source system catalog only
SQL Query 
WITH constraint_names AS (
select 
case when o.contype='p' then 'PRIMARY KEY'
when o.contype='u' then 'UNIQUE'
when o.contype='f' then 'FOREIGN KEY'
when o.contype='c' then 'TABLE CHECK'
when o.contype='x' then 'EXCLUDE'
when o.contype='t' then 'CONSTRAINT TRIGGER' END AS constraint_type,
(select nspname from pg_namespace where oid=o.connamespace) as table_schema,
c.relname AS table_name,
o.conname AS constraint_name
from pg_constraint o inner join pg_class c on c.oid = o.conrelid
where o.contype in ('p','u','c','f','x')
and conislocal=true)

SELECT constraint_type, table_schema, table_name, constraint_name
FROM constraint_names
WHERE constraint_name NOT ILIKE  '%' || table_name || '%'
AND translate(constraint_name,'_','') NOT ILIKE  '%' || translate(table_name,'_','') || '%'
ORDER BY constraint_type, table_schema, table_name;
Collections

This query belongs to the following collections:

NameDescription
Find problems about namesA selection of queries that return information about the names of database objects. Contains all the types of queries - problem detection, software measure, and general overview.
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:

NameDescription
Comfortability of database evolutionQueries of this category provide information about the means that influence database evolution.
NamingQueries of this category provide information about the style of naming.