SELECT
  'player' AS subjectType,
  CAST(profile.id AS TEXT) AS subjectId,
  CAST(profile.id AS TEXT) AS userProfileId,
  CAST(prisoner.id AS TEXT) AS gamePlayerId,
  NULL AS vehicleId,
  NULL AS baseId,
  entity.location_x AS x,
  entity.location_y AS y,
  entity.location_z AS z,
  datetime(prisoner.last_save_time, 'unixepoch') AS observedAt
FROM user_profile profile
JOIN prisoner ON prisoner.id = profile.prisoner_id
JOIN prisoner_entity ON prisoner_entity.prisoner_id = prisoner.id
JOIN entity ON entity.id = prisoner_entity.entity_id
WHERE (:subjectType IS NULL OR :subjectType = 'player')
UNION ALL
SELECT
  'vehicle' AS subjectType,
  CAST(spawner.vehicle_entity_id AS TEXT) AS subjectId,
  NULL AS userProfileId,
  NULL AS gamePlayerId,
  CAST(spawner.vehicle_entity_id AS TEXT) AS vehicleId,
  NULL AS baseId,
  entity.location_x AS x,
  entity.location_y AS y,
  entity.location_z AS z,
  datetime(spawner.vehicle_last_access_time, 'unixepoch') AS observedAt
FROM vehicle_spawner spawner
JOIN entity ON entity.id = spawner.vehicle_entity_id
WHERE (:subjectType IS NULL OR :subjectType = 'vehicle')
UNION ALL
SELECT
  'base' AS subjectType,
  CAST(base.id AS TEXT) AS subjectId,
  CAST(base.owner_user_profile_id AS TEXT) AS userProfileId,
  NULL AS gamePlayerId,
  NULL AS vehicleId,
  CAST(base.id AS TEXT) AS baseId,
  base.location_x AS x,
  base.location_y AS y,
  0 AS z,
  NULL AS observedAt
FROM base
WHERE (:subjectType IS NULL OR :subjectType = 'base')
UNION ALL
SELECT
  'flag' AS subjectType,
  CAST(flag.element_id AS TEXT) AS subjectId,
  CAST(element.owner_profile_id AS TEXT) AS userProfileId,
  CAST(owner.prisoner_id AS TEXT) AS gamePlayerId,
  NULL AS vehicleId,
  CAST(element.base_id AS TEXT) AS baseId,
  element.location_x AS x,
  element.location_y AS y,
  element.location_z AS z,
  datetime(flag.overtake_end_time, 'unixepoch') AS observedAt
FROM base_element_flag flag
JOIN base_element element ON element.element_id = flag.element_id
LEFT JOIN user_profile owner ON owner.id = element.owner_profile_id
WHERE (:subjectType IS NULL OR :subjectType = 'flag')
LIMIT COALESCE(:limit, 500)