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Qarion ETL

A powerful framework for building data transformation pipelines

Qarion ETL is a comprehensive data transformation framework designed to simplify the creation, management, and execution of data pipelines. Whether you're building ETL processes, data quality checks, or complex transformation workflows, Qarion ETL provides the tools and abstractions you need.

What is Qarion ETL?​

Qarion ETL is a declarative data transformation framework that allows you to:

  • Define data pipelines declaratively using TOML configuration files
  • Build reusable transformation flows with multiple flow types (Change Feed, Delta Publishing, Quality Check, Export, and more)
  • Ensure data quality with built-in quality check suites and validation
  • Manage data evolution with schema evolution and migration support
  • Extend functionality through a flexible plugin architecture
  • Generate code for multiple engines (SQL, Pandas, DBT, etc.)

Key Features​

🚀 Multiple Flow Types​

Qarion ETL supports 9 different flow types, each optimized for specific use cases:

  • Change Feed: Track data changes over time
  • Delta Publishing: Process financial transactions and accounting data
  • Quality Check: Run systematic data quality validation
  • Export Flow: Export data to files in various formats
  • Sessionization: Group events into sessions
  • Growth Accounting: Analyze user growth metrics
  • Outbox: Reliable event publishing
  • SCD2: Historical dimension tracking
  • Standard: Flexible task-based pipelines

📊 Data Quality & Validation​

Comprehensive data quality and validation system:

  • Data Contracts: Define and enforce schema and data quality expectations
  • Quality Check Suites: Reusable validation rules
  • Multiple Check Types: Completeness, uniqueness, range, pattern, referential integrity
  • Automatic Validation: Contract validation after ingestion, quality checks after transformations
  • Configurable Modes: Strict, lenient, or monitor modes for validation
  • Integration with Flows: Automated quality validation in your pipelines

🔌 Extensible Architecture​

  • Plugin system for engines, flows, code generators, and more
  • Support for multiple storage backends
  • Engine-agnostic transformation instructions
  • Custom task types and transformations

🛠️ Developer-Friendly​

  • Declarative configuration (TOML files)
  • Automatic code generation
  • Migration management
  • Comprehensive CLI tools
  • Rich documentation

Quick Start​

Installation​

pip install qarion-etl

Initialize a Project​

qarion-etl init

This creates the project structure with directories for:

  • flows/ - Flow definitions
  • datasets/ - Dataset schemas
  • migrations/ - Database migrations
  • data_quality/ - Quality check suites
  • plugins/ - Custom plugins

Create Your First Flow​

qarion-etl new-flow

Run a Flow​

qarion-etl run --flow my_flow

Documentation​

📖 User Documentation​

Learn how to use Qarion ETL to build data transformation pipelines:

🔧 Developer Documentation​

Learn how to extend and contribute to Qarion ETL:

Use Cases​

Qarion ETL is ideal for:

  • ETL Pipelines: Extract, transform, and load data from various sources
  • Data Quality Monitoring: Systematic validation of data quality
  • Change Tracking: Track and process data changes over time
  • Financial Data Processing: Transaction processing and accounting workflows
  • Event Processing: Sessionization and event-driven architectures
  • Data Warehousing: SCD2 dimensions and historical tracking
  • Data Export: Export processed data to files for downstream systems

Why Qarion ETL?​

  • Declarative: Define what you want, not how to do it
  • Flexible: Multiple flow types for different use cases
  • Extensible: Plugin architecture for custom functionality
  • Quality-Focused: Built-in data quality checking
  • Engine-Agnostic: Works with SQL, Pandas, DBT, and more
  • Production-Ready: Migration management, error handling, and more

Get Started​

Ready to build your first data pipeline?

  1. Install Qarion ETL
  2. Read Getting Started Guide
  3. Learn Core Concepts
  4. Try Examples

Community & Support​

  • Documentation: Comprehensive guides and references
  • Examples: Real-world examples and tutorials
  • CLI Tools: Powerful command-line interface

Start building better data pipelines today with Qarion ETL!