fix repeatable migrations

db/views/R__057_vw_forecast_accuracy.sql

@@ -0,0 +1,78 @@
+CREATE OR REPLACE VIEW ems.vw_forecast_accuracy_by_lead_time AS
+SELECT *
+FROM (
+    SELECT
+        site_id,
+        pv_array_id,
+        CASE
+            WHEN lead_time_hours <= 6   THEN '0-6h'
+            WHEN lead_time_hours <= 12  THEN '6-12h'
+            WHEN lead_time_hours <= 24  THEN '12-24h'
+            WHEN lead_time_hours <= 48  THEN '24-48h'
+            ELSE '48h+'
+        END                                         AS lead_time_bucket,
+        COUNT(*)                                    AS slot_count,
+        COUNT(*) FILTER (WHERE actual_power_w > 100) AS daylight_slots,
+        ROUND(AVG(error_pct)
+              FILTER (WHERE actual_power_w > 100), 2) AS avg_error_pct,
+        ROUND(AVG(ABS(error_pct))
+              FILTER (WHERE actual_power_w > 100), 2) AS avg_abs_error_pct,
+        ROUND(STDDEV(error_pct)
+              FILTER (WHERE actual_power_w > 100), 2) AS stddev_error_pct,
+        CASE
+            WHEN AVG(error_pct) FILTER (WHERE actual_power_w > 100) > 10
+            THEN 'nadhodnocuje'
+            WHEN AVG(error_pct) FILTER (WHERE actual_power_w > 100) < -10
+            THEN 'podhodnocuje'
+            ELSE 'ok'
+        END                                         AS bias
+    FROM ems.forecast_accuracy
+    WHERE actual_power_w IS NOT NULL
+    GROUP BY
+        site_id,
+        pv_array_id,
+        CASE
+            WHEN lead_time_hours <= 6   THEN '0-6h'
+            WHEN lead_time_hours <= 12  THEN '6-12h'
+            WHEN lead_time_hours <= 24  THEN '12-24h'
+            WHEN lead_time_hours <= 48  THEN '24-48h'
+            ELSE '48h+'
+        END
+) bucketed
+ORDER BY
+    site_id,
+    pv_array_id,
+    CASE lead_time_bucket
+        WHEN '0-6h'   THEN 1
+        WHEN '6-12h'  THEN 2
+        WHEN '12-24h' THEN 3
+        WHEN '24-48h' THEN 4
+        WHEN '48h+'   THEN 5
+    END;
+
+COMMENT ON VIEW ems.vw_forecast_accuracy_by_lead_time IS
+'Přesnost FVE forecastu dle lead time (jak daleko předem byl forecast vytvořen).
+Ignoruje noční sloty (actual < 100W). avg_error_pct > 0 = forecast nadhodnocuje.
+Po 4+ týdnech dat lze použít pro kalibraci safety_factor v solveru.';
+
+CREATE OR REPLACE VIEW ems.vw_forecast_accuracy_daily AS
+SELECT
+    site_id,
+    pv_array_id,
+    DATE(interval_start AT TIME ZONE 'Europe/Prague') AS day,
+    COUNT(*) FILTER (WHERE actual_power_w IS NOT NULL
+                       AND actual_power_w > 100)      AS daylight_slots,
+    ROUND(SUM(forecast_power_w)::NUMERIC / 4000, 2)   AS forecast_kwh,
+    ROUND(SUM(actual_power_w)::NUMERIC   / 4000, 2)   AS actual_kwh,
+    ROUND((SUM(forecast_power_w) - SUM(COALESCE(actual_power_w,0)))
+          ::NUMERIC / NULLIF(SUM(actual_power_w),0) * 100, 2) AS day_error_pct
+FROM ems.forecast_accuracy
+GROUP BY
+    site_id,
+    pv_array_id,
+    DATE(interval_start AT TIME ZONE 'Europe/Prague')
+ORDER BY day DESC;
+
+COMMENT ON VIEW ems.vw_forecast_accuracy_daily IS
+'Denní souhrn přesnosti FVE forecastu v kWh. forecast_kwh vs actual_kwh.
+day_error_pct > 0 = forecast nadhodnotil denní výrobu.';