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db/migration/V011__indexes_and_aggregates.sql

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+-- ============================================================
+-- V011__indexes_and_aggregates.sql
+-- Doplňuje V010__indexes.sql: indexy na forecast + hourly CA telemetrie.
+-- (Indexy planning_run, planning_interval, market_price, audit, mode_log,
+--  ev_session jsou již ve V010 – zde se neopakují, aby nevznikly duplicitní B-stromy.)
+-- ============================================================
+
+-- ============================================================
+-- Indexy pro výkon (forecast – nové oproti V010)
+-- ============================================================
+
+CREATE INDEX IF NOT EXISTS idx_forecast_run_site_array
+    ON ems.forecast_pv_run (site_id, pv_array_id, created_at DESC);
+
+CREATE INDEX IF NOT EXISTS idx_forecast_interval_run_start
+    ON ems.forecast_pv_interval (run_id, interval_start);
+
+-- ============================================================
+-- TimescaleDB Continuous Aggregates pro dashboard výkon
+-- ============================================================
+
+-- Hodinové agregáty telemetrie střídače (pro graf posledních 7 dní)
+CREATE MATERIALIZED VIEW IF NOT EXISTS ems.telemetry_inverter_hourly
+WITH (timescaledb.continuous) AS
+SELECT
+    time_bucket('1 hour', measured_at)    AS hour,
+    site_id,
+    AVG(pv_power_w)::INT                  AS avg_pv_w,
+    AVG(battery_power_w)::INT             AS avg_battery_w,
+    AVG(grid_power_w)::INT                AS avg_grid_w,
+    AVG(load_power_w)::INT                AS avg_load_w,
+    LAST(battery_soc_percent, measured_at) AS last_soc_pct,
+    COUNT(*)                               AS sample_count
+FROM ems.telemetry_inverter
+GROUP BY hour, site_id
+WITH NO DATA;
+
+-- Refresh policy: každých 15 minut. Okno musí pokrývat ≥2× time_bucket (1h) → min. šířka >2h.
+SELECT add_continuous_aggregate_policy(
+    'ems.telemetry_inverter_hourly',
+    start_offset => INTERVAL '2 hours 15 minutes',
+    end_offset   => INTERVAL '1 minute',
+    schedule_interval => INTERVAL '15 minutes'
+);
+
+-- ============================================================
+-- View pro použití v dashboardu (7 dní zpět)
+-- ============================================================
+
+CREATE OR REPLACE VIEW ems.vw_telemetry_hourly_7d AS
+SELECT *
+FROM ems.telemetry_inverter_hourly
+WHERE hour >= now() - INTERVAL '7 days'
+ORDER BY hour DESC;
+
+COMMENT ON VIEW ems.telemetry_inverter_hourly IS
+'Hodinové agregáty telemetrie střídače. TimescaleDB continuous aggregate.
+Refresh každých 15 minut. Používat pro grafy delší než 1 den.';