Engineering Self-Healing SQL Pipelines With LLMs: Validation, Guardrails, and Safe Recovery

A self-healing SQL pipeline should not mean autonomous SQL generation followed by privileged execution. In production, the safer interpretation is narrower, where a language model proposes a repair, while deterministic controls decide whether that repair is syntactically valid, semantically plausible, operationally safe, and eligible for execution. This distinction matters because the same mechanism that corrects a renamed column can also generate an unintended DELETE , widen a join, or scan an unexpectedly large dataset.