query-farm-flight-server

A robust Python framework for building Apache Arrow Flight servers that integrate seamlessly with the Airport extension for DuckDB.

This framework enables secure, efficient, and scalable server implementations with features such as authentication, schema management, and predicate pushdown for data queries.

🚀 Key Features

• ✅ Authentication & Authorization: Pluggable backends for secure access control
• 📚 Schema & Table Management: Full support for schema evolution and DDL operations
• 📈 Rate Limiting & Usage Tracking: Monitor and control client usage
• 🧩 Extensible & Type-Safe: Built for safe and scalable extension
• ☁️ AWS Integration: Support for S3 storage and DynamoDB-based authentication

🛰 Arrow Flight Server Support

Designed to simplify the development of Arrow Flight servers:

• Generic, reusable base classes for implementing Arrow Flight endpoints
• Standardized handlers for all major data operations
• Supports both streaming and batch workflows
• Typed parameter parsing and serialization for safer code

🔐 Authentication System

Unified interface for multiple authentication backends:

• In-memory backend for local development and tests
• DynamoDB backend for scalable, persistent auth
• Naive implementation for prototyping
• Token-based auth with built-in rate limiting

🔄 Data Serialization

Efficient and type-safe serialization for Airport-compatible servers:

• Parameter serialization using MessagePack
• Record batch transfer using Arrow IPC
• Support for DuckDB expression (de)serialization
• Optimized binary payloads for Arrow Flight actions

🛠 Admin CLI

Built-in command-line tool for managing and monitoring your server:

• Create and manage user accounts and tokens
• Monitor usage and generate reports
• Manage configuration settings

🧩 Designed for Extension

Whether you're integrating new storage backends, customizing authentication, or implementing complex business logic, query-farm-flight-server is built to scale with your needs while keeping your codebase clean and type-safe.

Getting Started

Installation

pip install query-farm-flight-server

Development

This python module is designed to be extended for specific database backends. Implement the abstract methods in BasicFlightServer to create a custom server for your specific data source.

The project maintains strict type safety through Python's typing system and Pydantic models, ensuring robust API contracts.

Author

This Python module was created by Query.Farm.

License

MIT Licensed.