hexinfo/dat

Combines pre-modeled semantic layers with an Askdata Agent workflow to enable natural language SQL generation across multiple databases (MySQL, PostgreSQL, Oracle, DuckDB) while ensuring query accuracy. Built on a pluggable SPI architecture with Java 17, supporting extensible LLM providers, embedding models, and vector storage backends (DuckDB, Weaviate, PGVector) for semantic retrieval-augmented query generation. Designed as a developer framework rather than platform—enables data engineers to define YAML-based semantic models locally via CLI or IDE, deployable as OpenAPI services or embedded via dat-sdk for custom UI implementations.

243 stars.