Show HN: 0Sql – Semantic Layer as a Service

Category: devtools

Tags: semantic-layer, sql-generation, query-planner, mcp, rust

Score: 8.3/10 (Innovation: 7, Technical: 9, Documentation: 9, Utility: 8)

0sql is a semantic layer that translates business-term query specs into dialect-specific SQL, acting as a deterministic planner that never connects to your warehouse. It handles cross-fact blending, row-level security, and 13 SQL dialects, with an MCP interface for agent integration. The project is notable for its high-performance Rust planner, extensive golden-case testing, and production-ready features like accounts and read-only keys.

Target audience: data engineers, backend developers, analytics engineers, devops

Repository: https://0sql.io/ · Rust · MIT · 6 stars

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