-- name: UpsertTrackFingerprint :exec
-- Written whenever a track's fingerprint is derived: by the scan when a file is
-- new or its bytes changed, and by the backfill (#3908) for rows derived by an
-- older method. Replaces the row wholesale — a fingerprint of the old bytes has
-- no standing once the file has changed.
INSERT INTO track_fingerprints (
    track_id, audio_stream_sha256, chromaprint, fingerprint_version
) VALUES (
    sqlc.arg(track_id), sqlc.narg(audio_stream_sha256), sqlc.narg(chromaprint),
    sqlc.arg(fingerprint_version)
)
ON CONFLICT (track_id) DO UPDATE SET
    audio_stream_sha256 = EXCLUDED.audio_stream_sha256,
    chromaprint         = EXCLUDED.chromaprint,
    fingerprint_version = EXCLUDED.fingerprint_version,
    computed_at         = now();

-- name: DeleteTrackFingerprint :exec
-- A file changed but could not be fingerprinted, for a reason unrelated to the
-- file. The stored row describes the OLD bytes, so it goes and the backfill
-- re-derives it — nothing may keep trusting a stale identity.
DELETE FROM track_fingerprints WHERE track_id = $1;