trying to ooptimise the measures table

src/app/api/portfolio/[portfolioId]/scenario/[scenarioId]/measures/route.ts

@@ -83,26 +83,23 @@ export async function GET(
       COUNT(DISTINCT r.property_id)::int AS homes_count,
       SUM(r.estimated_cost)::float       AS total_cost,
       AVG(r.estimated_cost)::float       AS average_cost
-    FROM (
-      SELECT DISTINCT ON (p.property_id)
-        p.id,
-        p.property_id
-      FROM plan p
-      WHERE p.portfolio_id = ${pid}
-        AND p.scenario_id  = ${sid}
-      ORDER BY p.property_id, p.created_at DESC
-    ) lp
-    JOIN plan_recommendations pr
-      ON pr.plan_id = lp.id
-    JOIN recommendation r
-      ON r.id = pr.recommendation_id
-    LEFT JOIN recommendation_materials rm
-      ON rm.recommendation_id = r.id
-    LEFT JOIN material m
-      ON m.id = rm.material_id
-    AND m.is_active = true
+    FROM recommendation r
     WHERE r.default = true
       AND r.already_installed = false
+      AND EXISTS (
+        SELECT 1
+        FROM (
+          SELECT DISTINCT ON (p.property_id)
+            p.id
+          FROM plan p
+          WHERE p.portfolio_id = ${pid}
+            AND p.scenario_id  = ${sid}
+          ORDER BY p.property_id, p.created_at DESC
+        ) lp
+        JOIN plan_recommendations pr
+          ON pr.plan_id = lp.id
+        WHERE pr.recommendation_id = r.id
+      )
     GROUP BY
       r.measure_type,
       r.type

src/app/db/migrations/2026_01_06_recommendation_cover.sql

@@ -0,0 +1,12 @@
+-- migrations/2026_01_06_recommendation_cover.sql
+
+CREATE INDEX CONCURRENTLY idx_recommendation_active_cover
+ON recommendation (
+  id,
+  property_id,
+  measure_type,
+  type
+)
+INCLUDE (estimated_cost)
+WHERE default = true
+  AND already_installed = false;