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# License Heartbeats Partition Management
## Overview
The `license_heartbeats` table uses PostgreSQL partitioning to efficiently store and query time-series data. Each partition contains data for one month.
## Problem
The monitoring dashboard may fail with "relation does not exist" errors when:
1. The current month's partition hasn't been created
2. The license_heartbeats table hasn't been properly initialized
## Solution
### Automatic Partition Creation
The monitoring routes now automatically:
1. Check if the `license_heartbeats` table exists
2. Create missing partitions for the current month
3. Handle missing table/partition gracefully by returning empty data
### Manual Partition Creation
If needed, you can manually create partitions:
1. **Using the migration script:**
```bash
docker exec -it v2_adminpanel python apply_partition_migration.py
```
2. **Using SQL directly:**
```sql
-- Create June 2025 partition
CREATE TABLE IF NOT EXISTS license_heartbeats_2025_06 PARTITION OF license_heartbeats
FOR VALUES FROM ('2025-06-01') TO ('2025-07-01');
```
### Partition Naming Convention
Partitions follow the naming pattern: `license_heartbeats_YYYY_MM`
Examples:
- `license_heartbeats_2025_01` - January 2025
- `license_heartbeats_2025_06` - June 2025
- `license_heartbeats_2025_12` - December 2025
### Best Practices
1. **Pre-create partitions**: Create partitions for the next 6 months to avoid runtime issues
2. **Monitor partition usage**: Check which partitions exist regularly
3. **Archive old data**: Consider dropping very old partitions to save space
### Troubleshooting
If you see "relation does not exist" errors:
1. Check if the base table exists:
```sql
SELECT EXISTS (
SELECT 1 FROM information_schema.tables
WHERE table_name = 'license_heartbeats'
);
```
2. List existing partitions:
```sql
SELECT tablename FROM pg_tables
WHERE tablename LIKE 'license_heartbeats_%'
ORDER BY tablename;
```
3. Create missing partition for current month:
```sql
-- Replace YYYY_MM with current year and month
CREATE TABLE IF NOT EXISTS license_heartbeats_YYYY_MM PARTITION OF license_heartbeats
FOR VALUES FROM ('YYYY-MM-01') TO ('YYYY-MM-01'::date + interval '1 month');
```

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# Database Migrations
## License Heartbeats Table Migration
### Overview
The `create_license_heartbeats_table.sql` migration creates a partitioned table for storing real-time license validation data. This table is essential for the Live Dashboard & Analytics functionality.
### Features
- Monthly partitioning for efficient data management
- Automatic creation of current and next month partitions
- Optimized indexes for performance
- Foreign key relationship with licenses table
### Running the Migration
#### Option 1: Using the Python Script
```bash
cd /path/to/v2_adminpanel
python apply_license_heartbeats_migration.py
```
#### Option 2: Manual SQL Execution
```bash
psql -h postgres -U postgres -d v2_adminpanel -f migrations/create_license_heartbeats_table.sql
```
#### Option 3: Docker Exec
```bash
docker exec -it v2_adminpanel_postgres psql -U postgres -d v2_adminpanel -f /migrations/create_license_heartbeats_table.sql
```
### Verification
After running the migration, verify the table was created:
```sql
-- Check if table exists
SELECT EXISTS (
SELECT 1
FROM information_schema.tables
WHERE table_name = 'license_heartbeats'
);
-- List all partitions
SELECT tablename
FROM pg_tables
WHERE tablename LIKE 'license_heartbeats_%'
ORDER BY tablename;
```
### Partition Management
The system automatically creates partitions as needed. To manually create future partitions:
```python
from utils.partition_helper import create_future_partitions
import psycopg2
conn = psycopg2.connect(...)
create_future_partitions(conn, 'license_heartbeats', months_ahead=6)
```
### Data Retention
Consider implementing a data retention policy to remove old partitions:
```sql
-- Drop partitions older than 3 months
DROP TABLE IF EXISTS license_heartbeats_2025_03;
```
### Troubleshooting
1. **Table already exists**: The migration is idempotent and will skip creation if the table exists.
2. **Permission denied**: Ensure the database user has CREATE privileges.
3. **Foreign key violation**: The licenses table must exist before running this migration.