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Co-authored-by: Cursor <cursoragent@cursor.com>

play-life-backend/migrations/000004_optimize_weekly_report_mv.down.sql

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+-- Migration: Revert optimization of weekly_report_mv
+-- Date: 2026-01-26
+--
+-- This migration reverts:
+-- 1. Removes created_date column from nodes table
+-- 2. Drops indexes
+-- 3. Restores MV to original structure (include current week, use entries.created_date)
+
+-- ============================================
+-- Step 1: Recreate MV with original structure
+-- ============================================
+DROP MATERIALIZED VIEW IF EXISTS weekly_report_mv;
+
+CREATE MATERIALIZED VIEW weekly_report_mv AS
+SELECT
+    p.id AS project_id,
+    agg.report_year,
+    agg.report_week,
+    COALESCE(agg.total_score, 0.0000) AS total_score,
+    CASE
+        WHEN wg.max_score IS NULL THEN COALESCE(agg.total_score, 0.0000)
+        ELSE LEAST(COALESCE(agg.total_score, 0.0000), wg.max_score)
+    END AS normalized_total_score
+FROM
+    projects p
+LEFT JOIN 
+    (
+        SELECT
+            n.project_id,
+            EXTRACT(ISOYEAR FROM e.created_date)::INTEGER AS report_year,
+            EXTRACT(WEEK FROM e.created_date)::INTEGER AS report_week,
+            SUM(n.score) AS total_score
+        FROM
+            nodes n
+        JOIN
+            entries e ON n.entry_id = e.id
+        GROUP BY
+            1, 2, 3
+    ) agg 
+    ON p.id = agg.project_id
+LEFT JOIN
+    weekly_goals wg
+    ON wg.project_id = p.id
+    AND wg.goal_year = agg.report_year
+    AND wg.goal_week = agg.report_week
+WHERE
+    p.deleted = FALSE
+ORDER BY
+    p.id, agg.report_year, agg.report_week
+WITH DATA;
+
+CREATE INDEX idx_weekly_report_mv_project_year_week 
+ON weekly_report_mv(project_id, report_year, report_week);
+
+-- ============================================
+-- Step 2: Drop indexes
+-- ============================================
+DROP INDEX IF EXISTS idx_nodes_project_user_created_date;
+DROP INDEX IF EXISTS idx_nodes_created_date_user;
+
+-- ============================================
+-- Step 3: Remove created_date column from nodes
+-- ============================================
+ALTER TABLE nodes 
+DROP COLUMN IF EXISTS created_date;
+
+COMMENT ON MATERIALIZED VIEW weekly_report_mv IS 'Materialized view aggregating weekly scores by project using ISOYEAR for correct week calculations at year boundaries. Includes all projects via LEFT JOIN. Adds normalized_total_score using weekly_goals.max_score snapshot.';