ems/db/views/R__058_vw_latest_telemetry.sql

-- =============================================================
-- R__058_vw_latest_telemetry.sql
-- EMS Platform – aktuální stav všech zařízení per lokalita
-- Repeatable migration
--
-- Výkon (audit 2026-06-11): původní DISTINCT ON přes celé hypertable
-- třídilo ~195k (inverter) / ~277k (EV) řádků při každém čtení
-- (fn_site_full_status ~1.7 s). LATERAL limit 1 per zařízení čte jen
-- špičku PK indexu ((inverter_id|charger_id, …, measured_at)).
-- =============================================================

-- security_invoker = false: oprávnění na podkladové hypertably nemusí mít ems_anon (PostgREST).
create or replace view ems.vw_latest_inverter
with (security_invoker = false)
as
select
  inv.site_id,
  inv.id                  as inverter_id,
  inv.code                as inverter_code,
  t.measured_at,
  t.pv_power_w,
  t.battery_soc_percent,
  t.battery_power_w,
  t.grid_power_w,
  t.load_power_w,
  t.inverter_temp_c,
  t.operating_mode,
  t.fault_code,
  now() - t.measured_at   as data_age,
  t.pv1_power_w,
  t.pv2_power_w,
  t.gen_port_power_w,
  t.batt_charge_today_wh,
  t.batt_discharge_today_wh,
  t.run_state,
  t.is_export_limited,
  t.pv_derating_flags
from ems.asset_inverter inv
left join lateral (
  select
    ti.measured_at,
    ti.pv_power_w,
    ti.battery_soc_percent,
    ti.battery_power_w,
    ti.grid_power_w,
    ti.load_power_w,
    ti.inverter_temp_c,
    ti.operating_mode,
    ti.fault_code,
    ti.pv1_power_w,
    ti.pv2_power_w,
    ti.gen_port_power_w,
    ti.batt_charge_today_wh,
    ti.batt_discharge_today_wh,
    ti.run_state,
    ti.is_export_limited,
    ti.pv_derating_flags
  from ems.telemetry_inverter ti
  where ti.inverter_id = inv.id
  order by ti.measured_at desc
  limit 1
) t on true
where t.measured_at is not null;

comment on view ems.vw_latest_inverter is
'Nejnovější telemetrická data pro každý střídač (LATERAL per-inverter, PK index). Slouží pro real-time dashboard a health check.';

-- ------------------------------------------------------------

create or replace view ems.vw_latest_ev_charger
with (security_invoker = false)
as
select
  ch.site_id,
  ch.id                   as charger_id,
  ch.code                 as charger_code,
  conn.connector_id,
  t.measured_at,
  t.status,
  t.power_w,
  t.energy_kwh,
  t.current_a,
  t.session_id,
  t.error_code,
  now() - t.measured_at   as data_age
from ems.asset_ev_charger ch
-- konektory za posledních 30 dní (tabulka konektorů neexistuje; konektor bez
-- telemetrie 30 dní je pro „latest“ dashboard mrtvý)
left join lateral (
  select distinct tc.connector_id
  from ems.telemetry_ev_charger tc
  where tc.charger_id = ch.id
    and tc.measured_at >= now() - interval '30 days'
) conn on true
left join lateral (
  select
    te.measured_at,
    te.status,
    te.power_w,
    te.energy_kwh,
    te.current_a,
    te.session_id,
    te.error_code
  from ems.telemetry_ev_charger te
  where te.charger_id = ch.id
    and te.connector_id = conn.connector_id
  order by te.measured_at desc
  limit 1
) t on true
where t.measured_at is not null;

comment on view ems.vw_latest_ev_charger is
'Nejnovější telemetrická data pro každý konektor EV nabíječky (LATERAL per-konektor, PK index). Slouží pro dashboard a řízení nabíjení.';

-- ------------------------------------------------------------

create or replace view ems.vw_latest_heat_pump
with (security_invoker = false)
as
select
  hp.site_id,
  hp.id                   as heat_pump_id,
  hp.code                 as heat_pump_code,
  t.measured_at,
  t.outdoor_temp_c,
  t.tuv_tank_temp_c,
  t.water_outlet_temp_c,
  t.power_w,
  t.operating_mode,
  t.cop_actual,
  t.defrost_active,
  t.alarm_code,
  -- Odhadovaný COP pro aktuální venkovní teplotu
  ems.fn_cop_estimate(hp.id, t.outdoor_temp_c) as cop_estimated,
  now() - t.measured_at   as data_age
from ems.asset_heat_pump hp
left join lateral (
  select
    thp.measured_at,
    thp.outdoor_temp_c,
    thp.tuv_tank_temp_c,
    thp.water_outlet_temp_c,
    thp.power_w,
    thp.operating_mode,
    thp.cop_actual,
    thp.defrost_active,
    thp.alarm_code
  from ems.telemetry_heat_pump thp
  where thp.heat_pump_id = hp.id
  order by thp.measured_at desc
  limit 1
) t on true;

comment on view ems.vw_latest_heat_pump is
'Nejnovější telemetrická data pro každé tepelné čerpadlo včetně odhadovaného COP.
Slouží pro real-time dashboard a rozhodovací logiku plánování.';