Tech on the Rocks Semantic Layers: The Missing Link Between AI and Data with David Jayatillake from Cube
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Feb 20, 2025 David Jayatillake, VP of AI at Cube, shares his expertise on the critical role of semantic layers in bridging raw data and actionable insights. He reveals how Cube achieved 100% accuracy in natural language data queries using semantic layers, vastly outperforming traditional methods. The conversation dives into the challenges of building these layers, emphasizing the significance of clear naming and documentation. Jayatillake also discusses future trends, including AI-powered features set to launch in 2025, and the potential of LLMs as intelligent agents.
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Delphi Labs' Success with Semantic Layers
- At Delphi Labs, David Jayatillake's team achieved 100% accuracy in natural language data queries using semantic layers with AI.
- Direct text-to-SQL approaches only reached 16% accuracy on the same benchmark.
Semantic Layers: Knowledge Graphs in Production
- A semantic layer is a knowledge graph that codifies how data fits together and what it means.
- It bridges data structures to business entities and defines metrics like revenue.
Building Semantic Layers Iteratively
- Start with your most important data when building a semantic layer.
- Expand it as needed based on access patterns and inconsistencies.