WITH key_columns AS (select target_schema as table_schema, target_table as table_name, a.attname as column_name
from (select 
(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
from pg_constraint o inner join pg_class c on c.oid = o.conrelid
where o.contype in ('u','p')) t
inner join pg_attribute a on t.target_col = a.attnum and t.target_table_oid = a.attrelid and a.attisdropped = false),
fk_columns AS (
select target_schema as table_schema, target_table as table_name, a.attname as column_name
from (select 
(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
from pg_constraint o inner join pg_class c on c.oid = o.conrelid
where o.contype = 'f') t
inner join pg_attribute a on t.target_col = a.attnum and t.target_table_oid = a.attrelid and a.attisdropped = false
),
user_defs AS (SELECT c.table_schema, c.table_name, c.column_name
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)
AND coalesce(c.column_default, domain_default)~*'(current_user|session_user)')
SELECT table_schema, table_name,  column_name
FROM INFORMATION_SCHEMA.columns AS c
WHERE column_name~*('^(isikukood|personal_code|.*_by|(id|kood|code)(_){0,1}(isik|tootaja|kasutaja|subjekt|person|worker|user|subject)|(isik|tootaja|kasutaja|subjekt|person|worker|user|subject)(_){0,1}(id|kood|code)|(isik|tootaja|kasutaja|person|worker|user))$')
AND (table_schema, table_name) IN (SELECT table_schema, table_name
FROM INFORMATION_SCHEMA.tables WHERE table_type='BASE TABLE') AND 
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 NOT EXISTS (SELECT 1 FROM key_columns AS pk WHERE pk.table_schema=c.table_schema AND pk.table_name=c.table_name AND pk.column_name=c.column_name) 
AND NOT EXISTS (SELECT 1 FROM fk_columns AS fk WHERE fk.table_schema=c.table_schema AND fk.table_name=c.table_name AND fk.column_name=c.column_name)
AND NOT EXISTS (SELECT 1 FROM user_defs AS ud WHERE ud.table_schema=c.table_schema AND ud.table_name=c.table_name AND ud.column_name=c.column_name)
ORDER BY table_schema, table_name, column_name;