Do not leave out referential constraints (based on composite keys)

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WITH fkey AS (SELECT 
(SELECT nspname FROM pg_namespace WHERE oid=c.relnamespace) AS key_schema,
c.relname AS key_table, 
o.conkey AS key_col,
c.oid AS key_table_oid
FROM pg_constraint o INNER JOIN pg_class c ON c.oid = o.conrelid
WHERE o.contype IN ('f')),
fkey_unnest AS (SELECT key_schema, key_table, key_table_oid, key_col, key_col_num, ordin
FROM fkey, unnest(fkey.key_col) with ordinality AS k(key_col_num, ordin)),
fkey_with_names AS (SELECT key_schema, key_table, a_key.attname AS key_col
FROM fkey_unnest k INNER JOIN pg_attribute a_key ON k.key_col_num = a_key.attnum AND k.key_table_oid = a_key.attrelid AND a_key.attisdropped = FALSE),
keys as (select 
(select nspname from pg_namespace where oid=c.relnamespace) as key_schema,
c.relname as key_table, 
c.oid as key_table_oid,
o.conkey AS key_col
from pg_constraint o inner join pg_class c on c.oid = o.conrelid
where o.contype in ('u', 'p') and cardinality(o.conkey)>1),
keys_unnest as (select key_schema, key_table, key_table_oid, key_col, key_col_num, ordin
from keys, unnest(keys.key_col) with ordinality as k(key_col_num, ordin)),
keys_with_names as (select key_schema, key_table, a_key.attname as key_col
from keys_unnest k inner join pg_attribute a_key on k.key_col_num = a_key.attnum and k.key_table_oid = a_key.attrelid and a_key.attisdropped = false),
surrogate_key AS (SELECT c.table_schema, c.table_name , c.column_name
FROM information_schema.columns c
LEFT JOIN information_schema.domains d USING (domain_schema, domain_name)
INNER JOIN information_schema.schemata s
ON c.table_schema=s.schema_name
WHERE  (coalesce (c.column_default, d.domain_default) ILIKE '%nextval%'  OR c.is_identity='YES')
AND (c.table_schema = 'public'
OR s.schema_owner<>'postgres'))

SELECT table_schema, table_name, column_name, data_type
FROM INFORMATION_SCHEMA.columns AS c
WHERE table_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 (table_schema, table_name) IN (SELECT table_schema, table_name
FROM INFORMATION_SCHEMA.tables
WHERE table_type='BASE TABLE')
AND (column_name~*'_id$'
OR column_name~*'.+(kood|code)$'
OR column_name~*'^(kood|code|id|k)_')
AND NOT EXISTS (SELECT 1
FROM fkey_with_names AS kwn
WHERE c.table_schema=kwn.key_schema
AND c.table_name=kwn.key_table
AND c.column_name=kwn.key_col)
AND NOT EXISTS (SELECT 1
FROM surrogate_key AS sk
WHERE c.table_schema=sk.table_schema
AND c.table_name=sk.table_name
AND c.column_name=sk.column_name)
AND EXISTS (SELECT 1
FROM keys_with_names AS kwn
WHERE c.table_schema=kwn.key_schema
AND c.table_name=kwn.key_table
AND c.column_name=kwn.key_col)
AND EXISTS (SELECT *
FROM INFORMATION_SCHEMA.columns AS co
WHERE table_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 (table_schema, table_name) IN (SELECT table_schema, table_name
FROM INFORMATION_SCHEMA.tables
WHERE table_type='BASE TABLE')
AND c.table_schema || '.' || c.table_name<>co.table_schema || '.' || co.table_name
AND c.column_name=co.column_name)
ORDER BY table_schema, table_name, ordinal_position;