Postgres has Bloom filters: https://www.postgresql.org/docs/current/bloom.html https://www.postgresql.org/docs/current/bloom.html It also has arrays, sets, and

Postgres has Bloom filters: https://www.postgresql.org/docs/current/bloom.html https://www.postgresql.org/docs/current/bloom.html It also has arrays, sets, and bitstrings, though for the latter you can just as easily (and with less space consumed) map it in your app, and store an integer.