4.6.0: Расчет срока разблокировки желаний

play-life-backend/migrations/000007_add_projects_median_mv.up.sql

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+-- Migration: Add projects_median_mv materialized view
+-- Date: 2026-01-30
+--
+-- This migration creates a materialized view that calculates the median score
+-- for each project based on the last 12 weeks of historical data from weekly_report_mv.
+-- The view includes user_id to support multi-tenant queries.
+
+CREATE MATERIALIZED VIEW projects_median_mv AS
+SELECT
+    p.id AS project_id,
+    p.user_id,
+    PERCENTILE_CONT(0.5) WITHIN GROUP (ORDER BY normalized_total_score) AS median_score
+FROM (
+    SELECT 
+        project_id, 
+        normalized_total_score,
+        report_year,
+        report_week,
+        ROW_NUMBER() OVER (PARTITION BY project_id ORDER BY report_year DESC, report_week DESC) as rn
+    FROM weekly_report_mv
+    WHERE 
+        (report_year < EXTRACT(ISOYEAR FROM CURRENT_DATE)::INTEGER)
+        OR (report_year = EXTRACT(ISOYEAR FROM CURRENT_DATE)::INTEGER 
+            AND report_week < EXTRACT(WEEK FROM CURRENT_DATE)::INTEGER)
+) sub
+JOIN projects p ON p.id = sub.project_id
+WHERE rn <= 12 AND p.deleted = FALSE
+GROUP BY p.id, p.user_id
+WITH DATA;
+
+CREATE INDEX idx_projects_median_mv_project_id ON projects_median_mv(project_id);
+CREATE INDEX idx_projects_median_mv_user_id ON projects_median_mv(user_id);
+
+COMMENT ON MATERIALIZED VIEW projects_median_mv IS 'Materialized view calculating median score for each project based on last 12 weeks of historical data. Includes user_id for multi-tenant support.';