Developer Guide

This guide is intended for Velox contributors and developers of Velox-based applications.

• Types
• Vectors
• How to add a scalar function?
• How to add an aggregate function?
• View and Writer Types
• How to add a lambda function?
• Expression Evaluation
• Dictionary Encoding
• Arena Allocation
• Hash table
• Aggregations
• Connectors
• Joins
• Anti joins
• Plan Nodes and Operators
• What’s in the Task?
• SIMD Usage in Velox
• Memory Management
• Spilling
• Serialization Formats
• Timestamp and Timezone Management
• Testing Tools
• Debugging Tools
• I/O Optimizations and the TpchBenchmark
• Window functions
• Dynamic Loading of Velox Extensions