with ck as (select 
o.conname,
(select nspname from pg_namespace where oid=c.relnamespace) as target_schema,
c.relname as target_table, 
c.oid as target_table_oid,
unnest(o.conkey) AS target_col,
substring(pg_get_constraintdef(o.oid),7) as consrc
from pg_constraint o inner join pg_class c on c.oid = o.conrelid
where o.contype = 'c' 
and cardinality(o.conkey)=2),
ck_names as (select ck.conname, ck.target_schema, ck.target_table, a_target.attname as target_col, ck.consrc
from ck inner join pg_attribute a_target on ck.target_col = a_target.attnum and ck.target_table_oid = a_target.attrelid and a_target.attisdropped = false
where (consrc~'(<|>|<>)' and consrc!~'(>=|<=)' and consrc!~*'not[[:space:]]*\(.*')
or (consrc~'(>=|<=)' and consrc~*'not[[:space:]]*\(.*')),
defaults AS (SELECT c.table_schema, t.table_type, c.table_name, c.column_name,  coalesce(c.column_default, domain_default) AS default_value,
CASE WHEN c.column_default IS NOT NULL THEN 'Column default' ELSE 'Domain default' END AS default_type
FROM information_schema.columns AS c LEFT JOIN information_schema.domains d USING (domain_schema, domain_name)
INNER JOIN INFORMATION_SCHEMA.tables AS t  USING (table_schema, table_name)
WHERE c.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 (column_default IS NOT NULL OR domain_default IS NOT NULL))
SELECT conname, target_schema, target_table, string_agg(target_col, ', ' ORDER BY target_col) AS target_col, any_value(default_value), any_value(consrc) AS consrc
FROM ck_names INNER JOIN defaults 
ON ck_names.target_schema=defaults.table_schema 
AND ck_names.target_table=defaults.table_name 
AND ck_names.target_col=defaults.column_name
GROUP BY conname, target_schema, target_table
HAVING Min(default_value)=Max(default_value)
AND Count(*)>1
ORDER BY target_schema, target_table, conname;