flumeview‑query is a FlumeDB view that adds functional “map‑filter‑reduce” query capabilities to immutable logs, letting developers run SQL‑like select/where/group‑by operations without predefined schemas. It builds and selects from user‑supplied indexes (including compound indexes) to accelerate queries, and is primarily used by Secure Scuttlebutt (ssb) applications that need flexible, privacy‑preserving data retrieval.