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CREATE EXTENSION IF NOT EXISTS fuzzystrmatch;
WITH columns AS (SELECT nspname AS table_schema, relname AS table_name, 
CASE WHEN relkind='r' THEN 'BASE TABLE'
WHEN relkind='v' THEN 'VIEW'
WHEN relkind='m' THEN 'MATERIALIZED VIEW'
WHEN relkind='f' THEN 'FOREIGN TABLE'
WHEN relkind='p' THEN 'PARTITIONED TABLE'
END AS table_type, 
translate(attname,'01234567890','') AS column_name_stripped,
pg_type.typname AS column_type,
domain_type.typname AS column_domain_type,
string_agg(attname, ',
' ORDER BY attname) AS columns
FROM pg_class INNER JOIN pg_namespace ON pg_class.relnamespace=pg_namespace.oid
INNER JOIN pg_attribute ON pg_class.oid=pg_attribute.attrelid
INNER JOIN pg_type ON pg_attribute.atttypid =pg_type.oid
LEFT JOIN pg_type AS domain_type ON domain_type.oid=pg_type.typbasetype
WHERE attnum>=1 
AND relkind IN ('r','v','m','f','p')
AND nspname NOT IN (SELECT schema_name
FROM INFORMATION_SCHEMA.schemata
WHERE schema_name<>'public' AND
schema_owner='postgres' AND schema_name IS NOT NULL)
GROUP BY table_schema, table_name, table_type, column_name_stripped, column_type, column_domain_type
)
SELECT c.table_schema, c.table_type, c.table_name, c.column_name_stripped AS col1, c.column_type AS col1_type, c.column_domain_type AS col1_domain_type,
c.columns AS col1_family,
c2.column_name_stripped AS col2, c2.column_type AS col2_type, c2.column_domain_type AS col2_domain_type, c2.columns AS col2_family
FROM columns AS c INNER JOIN columns AS c2 USING (table_schema, table_name)
WHERE c.column_name_stripped>c2.column_name_stripped
AND levenshtein_less_equal(c.column_name_stripped,c2.column_name_stripped,1)=1
AND c.column_type IS NOT DISTINCT FROM c2.column_type
AND c.column_domain_type IS NOT DISTINCT FROM c2.column_domain_type
ORDER BY table_type, table_schema, table_name;

DROP EXTENSION IF EXISTS fuzzystrmatch;