WITH fk_cols 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)
SELECT table_schema, table_name, column_name, data_type, character_maximum_length
FROM INFORMATION_SCHEMA.columns AS c
WHERE (data_type='character') 
AND character_maximum_length>1 
AND (table_schema, table_name) IN (SELECT table_schema, table_name
FROM INFORMATION_SCHEMA.tables WHERE table_type='BASE TABLE') 
AND column_name !~*'(kood|code|flag|key|type|tyyp|state|seisund|olek|curr|currency|country|keel|riik|parool|passw|hash|(?<!(tel|telef|telefoni|phone)[_]{0,1})number)' 
AND column_name !~*'_id$' 
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 fk_cols
WHERE fk_cols.table_schema=c.table_schema AND fk_cols.table_name=c.table_name AND fk_cols.column_name=c.column_name)
ORDER BY table_schema, table_name, ordinal_position;