Database Query Timeout Handler

Implement query timeout handling for this scenario:

**Application Stack:** {{APPLICATION_STACK}}
**Database System:** {{DATABASE_SYSTEM}}
**Query Types:** {{QUERY_TYPES}}
**Current Timeout Issues:** {{TIMEOUT_ISSUES}}
**SLA Requirements:** {{SLA}}

Please provide:
1. Timeout configuration at each layer:
   - Application level
   - Connection pool level
   - Database level
2. Statement timeout implementation
3. Transaction timeout handling
4. Graceful timeout recovery
5. Retry strategies with backoff
6. User feedback during long operations
7. Query cancellation implementation
8. Logging and monitoring timeouts
9. Alternative approaches for long queries
10. Testing timeout scenarios