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Sep 8, 2026 · Databases

Why LLM-Generated SQL Fails in Production: A Three-Layer Architecture for Reliable Text-to-SQL

The article explains why directly using LLMs to generate SQL leads to sub-50% accuracy in production, and presents a proven three-layer architecture—semantic layer for business knowledge, LLM layer for structured DSL generation, and deterministic execution layer for dialect-specific SQL translation—that achieves 85-90% accuracy through RAG, ambiguity detection, and feedback loops.