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db/routines/R__fn_effective_price.sql

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+-- =============================================================
+-- R__fn_effective_price.sql
+-- EMS Platform – funkce pro výpočet efektivní ceny per site
+-- Repeatable migration – nasazuje se při každé změně
+-- =============================================================
+
+CREATE OR REPLACE FUNCTION ems.fn_effective_buy_price(
+    p_site_id      INT,
+    p_interval_start TIMESTAMPTZ
+)
+RETURNS NUMERIC(10,6)
+LANGUAGE sql
+STABLE
+AS $$
+    SELECT
+        mip.buy_raw_price_czk_kwh
+        + smc.buy_margin_fixed_czk
+        + (mip.buy_raw_price_czk_kwh * smc.buy_margin_percent / 100.0)
+    FROM ems.market_interval_price mip
+    CROSS JOIN ems.site_market_config smc
+    WHERE mip.market_source = 'OTE_CZ'
+      AND mip.interval_start = p_interval_start
+      AND smc.site_id = p_site_id
+      AND smc.valid_from <= p_interval_start
+      AND (smc.valid_to IS NULL OR smc.valid_to > p_interval_start)
+    ORDER BY smc.valid_from DESC
+    LIMIT 1;
+$$;
+
+COMMENT ON FUNCTION ems.fn_effective_buy_price(INT, TIMESTAMPTZ) IS
+'Vrátí efektivní nákupní cenu elektřiny v Kč/kWh pro danou lokalitu a 15min interval.
+Přičítá fixní a procentní nákupní marži dle aktuálně platné site_market_config.';
+
+-- ------------------------------------------------------------
+
+CREATE OR REPLACE FUNCTION ems.fn_effective_sell_price(
+    p_site_id        INT,
+    p_interval_start TIMESTAMPTZ
+)
+RETURNS NUMERIC(10,6)
+LANGUAGE sql
+STABLE
+AS $$
+    SELECT
+        mip.sell_raw_price_czk_kwh
+        + smc.sell_margin_fixed_czk
+        + (mip.sell_raw_price_czk_kwh * smc.sell_margin_percent / 100.0)
+    FROM ems.market_interval_price mip
+    CROSS JOIN ems.site_market_config smc
+    WHERE mip.market_source = 'OTE_CZ'
+      AND mip.interval_start = p_interval_start
+      AND smc.site_id = p_site_id
+      AND smc.valid_from <= p_interval_start
+      AND (smc.valid_to IS NULL OR smc.valid_to > p_interval_start)
+    ORDER BY smc.valid_from DESC
+    LIMIT 1;
+$$;
+
+COMMENT ON FUNCTION ems.fn_effective_sell_price(INT, TIMESTAMPTZ) IS
+'Vrátí efektivní prodejní cenu elektřiny v Kč/kWh pro danou lokalitu a 15min interval.
+Aplikuje fixní a procentní prodejní marži (záporná marže = srážka z prodejní ceny).';