Initial commit

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

scripts/add-database-indexes.sql

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+-- Database Performance Indexes
+-- Adds indexes to frequently queried columns for improved performance
+--
+-- Run with: sqlite3 /opt/media-downloader/database/downloads.db < scripts/add-database-indexes.sql
+
+-- ============================================================================
+-- Downloads Table Indexes
+-- ============================================================================
+
+-- Index on platform for filtering downloads by platform
+CREATE INDEX IF NOT EXISTS idx_downloads_platform
+ON downloads(platform);
+
+-- Index on source for filtering downloads by source/username
+CREATE INDEX IF NOT EXISTS idx_downloads_source
+ON downloads(source);
+
+-- Index on download_date for time-based queries (DESC for most recent first)
+CREATE INDEX IF NOT EXISTS idx_downloads_download_date
+ON downloads(download_date DESC);
+
+-- Index on status for filtering by download status
+CREATE INDEX IF NOT EXISTS idx_downloads_status
+ON downloads(status);
+
+-- Compound index for platform + source queries (common filter combination)
+CREATE INDEX IF NOT EXISTS idx_downloads_platform_source
+ON downloads(platform, source);
+
+-- Compound index for platform + download_date (common for analytics)
+CREATE INDEX IF NOT EXISTS idx_downloads_platform_date
+ON downloads(platform, download_date DESC);
+
+-- Index on filename for search queries
+CREATE INDEX IF NOT EXISTS idx_downloads_filename
+ON downloads(filename);
+
+-- Index on media_id for duplicate detection
+CREATE INDEX IF NOT EXISTS idx_downloads_media_id
+ON downloads(media_id)
+WHERE media_id IS NOT NULL;
+
+-- Index on file_hash for duplicate detection
+CREATE INDEX IF NOT EXISTS idx_downloads_file_hash
+ON downloads(file_hash)
+WHERE file_hash IS NOT NULL;
+
+-- ============================================================================
+-- Notifications Table Indexes
+-- ============================================================================
+
+-- Index on sent_at for time-based queries
+CREATE INDEX IF NOT EXISTS idx_notifications_sent_at
+ON notifications(sent_at DESC);
+
+-- Index on platform for filtering notifications
+CREATE INDEX IF NOT EXISTS idx_notifications_platform
+ON notifications(platform);
+
+-- Index on status for filtering by notification status
+CREATE INDEX IF NOT EXISTS idx_notifications_status
+ON notifications(status);
+
+-- Compound index for platform + sent_at (common query)
+CREATE INDEX IF NOT EXISTS idx_notifications_platform_sent_at
+ON notifications(platform, sent_at DESC);
+
+-- ============================================================================
+-- Scheduler State Table Indexes
+-- ============================================================================
+
+-- Index on status for active task queries
+CREATE INDEX IF NOT EXISTS idx_scheduler_state_status
+ON scheduler_state(status);
+
+-- Index on next_run for finding next scheduled tasks
+CREATE INDEX IF NOT EXISTS idx_scheduler_state_next_run
+ON scheduler_state(next_run ASC);
+
+-- Index on platform for platform-specific queries
+CREATE INDEX IF NOT EXISTS idx_scheduler_state_platform
+ON scheduler_state(platform);
+
+-- ============================================================================
+-- Users Table Indexes
+-- ============================================================================
+
+-- Index on username for login queries
+CREATE INDEX IF NOT EXISTS idx_users_username
+ON users(username);
+
+-- Index on email for lookup queries (if email is used)
+CREATE INDEX IF NOT EXISTS idx_users_email
+ON users(email)
+WHERE email IS NOT NULL;
+
+-- ============================================================================
+-- Performance Analysis
+-- ============================================================================
+
+-- Run ANALYZE to update query planner statistics
+ANALYZE;
+
+-- Display index information
+SELECT
+    'Index Information' as info,
+    name as index_name,
+    tbl_name as table_name
+FROM sqlite_master
+WHERE type = 'index'
+AND name LIKE 'idx_%'
+ORDER BY tbl_name, name;