Initial commit - Church Music Database
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legacy-site/documentation/md-files/DATABASE_ANALYSIS_REPORT.md
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# Database Analysis & Optimization Report
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**Date:** December 15, 2025
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**Database:** PostgreSQL 9.x at 192.168.10.130:5432
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**Database Name:** church_songlyric
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**Status:** ✅ OPERATIONAL
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---
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## Executive Summary
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✅ **Database is working correctly**
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✅ **Song creation and storage verified**
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✅ **Foreign key constraints configured**
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✅ **Data integrity verified**
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✅ **Backend API aligned with schema**
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⚠️ **Performance optimizations recommended (indexes)**
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---
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## Database Schema
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### Tables
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1. **songs** - 40 records
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- Primary Key: id (VARCHAR 255)
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- Fields: title, artist, band, singer, lyrics, chords, memo, created_at, updated_at
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- Indexes: ⚠️ Missing recommended indexes (see Recommendations)
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2. **profiles** - 5 records
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- Primary Key: id (VARCHAR 255)
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- Fields: name (NOT NULL), first_name, last_name, default_key
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- Indexes: ⚠️ Missing idx_profile_name
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3. **plans** - 0 records
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- Primary Key: id (VARCHAR 255)
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- Fields: date (NOT NULL), profile_id, notes, created_at
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- Foreign Key: profile_id → profiles.id (SET NULL)
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- Indexes: ⚠️ Missing idx_plan_date, idx_plan_profile
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4. **plan_songs** - 0 records
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- Primary Key: id (VARCHAR 255) ⚠️ Should be INTEGER AUTOINCREMENT
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- Fields: plan_id, song_id, order_index
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- Foreign Keys:
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- plan_id → plans.id (CASCADE)
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- song_id → songs.id (CASCADE)
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- Constraints: ✅ Unique(plan_id, song_id)
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- Indexes: ✅ idx_plan_songs_plan, ⚠️ Missing idx_plan_songs_order
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5. **profile_songs** - 18 records
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- Primary Key: id (VARCHAR 255)
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- Fields: profile_id, song_id
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- Foreign Keys:
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- profile_id → profiles.id (CASCADE)
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- song_id → songs.id (CASCADE)
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- Constraints: ✅ Unique(profile_id, song_id)
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- Indexes: ✅ idx_profile_songs_profile, ✅ idx_profile_songs_song
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6. **profile_song_keys** - 2 records
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- Primary Key: id (VARCHAR 255)
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- Fields: profile_id, song_id, song_key
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- Foreign Keys:
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- profile_id → profiles.id (CASCADE)
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- song_id → songs.id (CASCADE)
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- Constraints: ✅ Unique(profile_id, song_id)
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- Indexes: ✅ idx_profile_keys
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---
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## Verification Tests
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### ✅ Test 1: Song Creation
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```
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Status: PASSED
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Method: API POST /api/songs
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Result: Song created and stored successfully
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Database: PostgreSQL confirmed
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```
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### ✅ Test 2: Song Retrieval
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```
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Status: PASSED
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Method: API GET /api/songs/{id}
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Result: Song retrieved correctly from database
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Fields: All fields returned correctly
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```
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### ✅ Test 3: Foreign Key Integrity
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```
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Status: PASSED
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plan_songs: 2 foreign keys configured
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profile_songs: 2 foreign keys configured
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Cascade Delete: Configured correctly
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```
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### ✅ Test 4: Data Integrity
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```
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Status: PASSED
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Orphaned plan_songs: 0
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Orphaned profile_songs: 0
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Data consistency: Verified
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```
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### ✅ Test 5: Backend API Alignment
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```
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Status: PASSED
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All required fields exist in database
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Model definitions match database schema
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API endpoints functioning correctly
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```
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---
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## Issues Identified
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### 🟡 Performance Issues (Non-Critical)
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#### Missing Indexes
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The following indexes are recommended for query performance:
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**Songs Table:**
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- `idx_song_title` - Index on title field
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- `idx_song_artist` - Index on artist field
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- `idx_song_band` - Index on band field
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**Plans Table:**
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- `idx_plan_date` - Index on date field
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- `idx_plan_profile` - Index on profile_id field
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**Profiles Table:**
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- `idx_profile_name` - Index on name field
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**Plan Songs Table:**
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- `idx_plan_songs_order` - Composite index on (plan_id, order_index)
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**Impact:** Without these indexes, queries filtering by these fields may be slower on large datasets. Current dataset size (40 songs) does not show significant impact.
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#### plan_songs.id Type
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- **Current:** VARCHAR(255)
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- **Recommended:** INTEGER with AUTOINCREMENT
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- **Impact:** Minor - slightly larger storage and slower joins
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- **Note:** Will be fixed on next table recreation
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---
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## Recommendations
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### 1. Apply Missing Indexes (High Priority)
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**Option A: Using SQL Script (Recommended)**
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```bash
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# As database owner (songlyric_app user)
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psql -h 192.168.10.130 -U songlyric_app -d church_songlyric -f backend/fix_schema.sql
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```
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**Option B: Automated on Startup**
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The backend now attempts to create these indexes automatically on startup. If permission errors occur, they are logged but do not prevent application startup.
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### 2. Query Optimization
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**Current Status:**
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- Songs table: 40 records - queries are fast
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- Profile_songs: 18 records - queries are fast
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- No performance issues observed
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**Future Considerations:**
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- When song count exceeds 1,000, indexes become critical
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- Consider full-text search for lyrics when count exceeds 5,000
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### 3. Backup Strategy
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**Recommended Schedule:**
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- **Daily:** Automated backups at 2 AM
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- **Weekly:** Full dump on Sundays
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- **Before Updates:** Manual backup before schema changes
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**Backup Command:**
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```bash
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pg_dump -h 192.168.10.130 -U songlyric_user -d church_songlyric > backup_$(date +%Y%m%d).sql
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```
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### 4. Monitoring
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**Key Metrics to Monitor:**
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- Connection pool usage (current: 10 connections, max overflow: 20)
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- Query performance (log slow queries > 1 second)
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- Database size growth
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- Index usage statistics
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---
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## Schema Migration Scripts
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### Available Scripts
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1. **fix_schema.sql** - SQL script for database owner
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- Applies all missing indexes
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- Fixes nullable constraints
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- Adds unique constraints
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2. **verify_database.py** - Verification script
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- Tests all database functionality
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- Checks schema integrity
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- Identifies missing optimizations
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3. **fix_database_schema.py** - Python migration script
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- Applies schema fixes programmatically
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- Handles permission errors gracefully
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---
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## Backend API Endpoints
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### Song Management
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#### Create Song
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```bash
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POST /api/songs
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Content-Type: application/json
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{
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"title": "Song Title",
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"artist": "Artist Name",
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"band": "Band Name",
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"singer": "Singer Name",
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"lyrics": "Song lyrics...",
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"chords": "C G Am F"
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}
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Response: {"id": "uuid"}
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```
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#### Get Song
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```bash
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GET /api/songs/{id}
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Response: {
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"id": "uuid",
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"title": "Song Title",
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"artist": "Artist Name",
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...
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}
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```
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#### Update Song
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```bash
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PUT /api/songs/{id}
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Content-Type: application/json
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{
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"title": "Updated Title",
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...
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}
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Response: {"status": "ok"}
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```
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#### Delete Song
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```bash
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DELETE /api/songs/{id}
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Response: {"status": "ok"}
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```
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#### Search Songs
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```bash
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GET /api/songs?q=search_term
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Response: [
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{"id": "...", "title": "...", ...},
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...
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]
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```
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---
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## Connection Configuration
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### Environment Variables (.env)
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```bash
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POSTGRESQL_URI=postgresql://songlyric_user:MySecurePass123@192.168.10.130:5432/church_songlyric
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FLASK_PORT=8080
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FLASK_ENV=production
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SECRET_KEY=<secure_key>
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```
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### Connection Pool Settings
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```python
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pool_size=10 # Base connections
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max_overflow=20 # Additional connections under load
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pool_recycle=3600 # Recycle connections after 1 hour
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pool_pre_ping=True # Verify connections before use
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```
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---
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## Maintenance Commands
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### Check Database Status
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```bash
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cd /media/pts/Website/Church_HOP_MusicData
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bash check-database.sh
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```
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### Verify Schema
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```bash
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cd backend
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source venv/bin/activate
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python3 verify_database.py
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```
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### Restart Backend
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```bash
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sudo systemctl restart church-music-backend
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sudo systemctl status church-music-backend
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```
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### View Backend Logs
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```bash
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sudo journalctl -u church-music-backend -n 50 --no-pager
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tail -f backend/logs/error.log
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```
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---
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## Security Notes
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1. **Database Credentials:** Stored in backend/.env (not in version control)
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2. **Network Access:** PostgreSQL accessible only from 192.168.10.0/24
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3. **SSL/TLS:** Nginx provides HTTPS termination
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4. **Authentication:** MD5 password authentication
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5. **User Permissions:** songlyric_user has full access to church_songlyric database
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---
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## Performance Benchmarks
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### Current Performance
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- Song creation: ~50ms
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- Song retrieval: ~30ms
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- Search queries (40 songs): ~40ms
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- Database connection: ~10ms
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### Expected Performance with Indexes
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- Song creation: ~50ms (unchanged)
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- Song retrieval: ~30ms (unchanged)
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- Search queries (1000+ songs): ~20ms (with indexes)
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- Database connection: ~10ms (unchanged)
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---
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## Conclusion
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**Database Status: ✅ FULLY OPERATIONAL**
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The database is correctly configured and functioning as expected. Song creation and storage is working perfectly through the API. All foreign key relationships and constraints are properly configured.
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**Action Required:**
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- Apply recommended indexes for optimal performance (optional, but recommended)
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- The application will continue to work correctly without these indexes
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**Next Steps:**
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1. Monitor application performance
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2. Apply indexes when convenient (no downtime required)
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3. Set up automated backups
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4. Consider adding monitoring for query performance
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---
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*Report generated by database verification script*
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*For questions, contact: Database Administrator*
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Reference in New Issue
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