Goal Find parameters that have the same name as the routine. The names may have different uppercase/lowercase characters. Make sure that the naming style is consistent.
Notes The query does not consider objects that are a part of an extension. There could be multiple routines with the same name but with different parameters in the same schema (overloading). Thus, for the unique identification of the routine it is necessary to present also its parameters in addition to the schema name and routine 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
Data Source INFORMATION_SCHEMA+system catalog
SQL Query
WITH params AS (SELECT 
specific_schema AS routine_schema,
regexp_replace(specific_name,'_[0-9]*$','') AS routine_name,
pg_get_function_identity_arguments(translate(substring(specific_name,'_[0-9]+$'),'_','')::int::oid) AS parameters,
parameter_name,
ordinal_position,
data_type
FROM 
information_schema.parameters
WHERE specific_schema NOT IN (SELECT schema_name
FROM INFORMATION_SCHEMA.schemata
WHERE schema_name<>'public' AND
schema_owner='postgres' AND schema_name IS NOT NULL) 
AND NOT EXISTS (SELECT 1
FROM pg_catalog.pg_depend d inner join pg_catalog.pg_proc pc ON d.objid=pc.oid
WHERE EXISTS (SELECT 1 FROM pg_catalog.pg_extension e WHERE d.refobjid=e.oid) AND
pc.proname || '_' || pc.oid = parameters.specific_name))
SELECT routine_schema, routine_name, parameters, parameter_name, ordinal_position, data_type
FROM params
WHERE parameter_name ILIKE routine_name || '\_%'
OR parameter_name ILIKE '%\_' || routine_name
OR parameter_name ILIKE '%\_' || routine_name || '\_%'
ORDER BY routine_schema, routine_name, parameters, ordinal_position;

Collections

This query belongs to the following collections:

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 .
Lexicon bad smells and linguistic antipatternsQueries made to find the occurrences of lexicon bad smells and linguistic antipatterns
Categories

This query is classified under the following categories:

NameDescription
NamingQueries of this category provide information about the style of naming.
User-defined routinesQueries of this category provide information about the user-defined routines

Further reading and related materials:

Reference
Smell "Whole-part": Abebe, S.L., Haiduc, S., Tonella, P., Marcus, A., 2011. The effect of lexicon bad smells on concept location in source code. In 2011 IEEE 11th International Working Conference on Source Code Analysis and Manipulation (pp. 125-134). IEEE.