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play-life-backend/migrations/001_create_schema.sql

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+-- Migration: Create database schema for play-life project
+-- This script creates all tables and materialized views needed for the project
+
+-- ============================================
+-- Table: projects
+-- ============================================
+CREATE TABLE IF NOT EXISTS projects (
+    id SERIAL PRIMARY KEY,
+    name VARCHAR(255) NOT NULL,
+    priority SMALLINT,
+    CONSTRAINT unique_project_name UNIQUE (name)
+);
+
+-- ============================================
+-- Table: entries
+-- ============================================
+-- This table stores entries with creation dates
+-- Used in weekly_report_mv for grouping by week
+CREATE TABLE IF NOT EXISTS entries (
+    id SERIAL PRIMARY KEY,
+    text TEXT NOT NULL,
+    created_date TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+-- ============================================
+-- Table: nodes
+-- ============================================
+-- This table stores nodes linked to projects and entries
+-- Contains score information used in weekly reports
+CREATE TABLE IF NOT EXISTS nodes (
+    id SERIAL PRIMARY KEY,
+    project_id INTEGER NOT NULL REFERENCES projects(id) ON DELETE CASCADE,
+    entry_id INTEGER NOT NULL REFERENCES entries(id) ON DELETE CASCADE,
+    score NUMERIC(8,4)
+);
+
+-- Create index on project_id for better join performance
+CREATE INDEX IF NOT EXISTS idx_nodes_project_id ON nodes(project_id);
+-- Create index on entry_id for better join performance
+CREATE INDEX IF NOT EXISTS idx_nodes_entry_id ON nodes(entry_id);
+
+-- ============================================
+-- Table: weekly_goals
+-- ============================================
+-- This table stores weekly goals for projects
+CREATE TABLE IF NOT EXISTS weekly_goals (
+    id SERIAL PRIMARY KEY,
+    project_id INTEGER NOT NULL REFERENCES projects(id) ON DELETE CASCADE,
+    goal_year INTEGER NOT NULL,
+    goal_week INTEGER NOT NULL,
+    min_goal_score NUMERIC(10,4) NOT NULL DEFAULT 0,
+    max_goal_score NUMERIC(10,4),
+    actual_score NUMERIC(10,4) DEFAULT 0,
+    priority SMALLINT,
+    CONSTRAINT weekly_goals_project_id_goal_year_goal_week_key UNIQUE (project_id, goal_year, goal_week)
+);
+
+-- Create index on project_id for better join performance
+CREATE INDEX IF NOT EXISTS idx_weekly_goals_project_id ON weekly_goals(project_id);
+
+-- ============================================
+-- Materialized View: weekly_report_mv
+-- ============================================
+CREATE MATERIALIZED VIEW IF NOT EXISTS weekly_report_mv AS
+SELECT
+    p.id AS project_id,
+    agg.report_year,
+    agg.report_week,
+    -- Используем COALESCE для установки total_score в 0.0000, если нет данных (NULL)
+    COALESCE(agg.total_score, 0.0000) AS total_score
+FROM
+    projects p
+LEFT JOIN 
+    (
+        -- 1. Предварительная агрегация: суммируем score по неделям
+        SELECT
+            n.project_id,
+            EXTRACT(YEAR 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 
+    -- 2. Присоединяем агрегированные данные ко ВСЕМ проектам
+    ON p.id = agg.project_id
+ORDER BY
+    p.id, agg.report_year, agg.report_week;
+
+-- Create index on materialized view for better query performance
+CREATE INDEX IF NOT EXISTS idx_weekly_report_mv_project_year_week 
+    ON weekly_report_mv(project_id, report_year, report_week);
+
+-- ============================================
+-- Comments for documentation
+-- ============================================
+COMMENT ON TABLE projects IS 'Projects table storing project information with priority';
+COMMENT ON TABLE entries IS 'Entries table storing entry creation timestamps';
+COMMENT ON TABLE nodes IS 'Nodes table linking projects, entries and storing scores';
+COMMENT ON TABLE weekly_goals IS 'Weekly goals for projects';
+COMMENT ON MATERIALIZED VIEW weekly_report_mv IS 'Materialized view aggregating weekly scores by project';
+