---
license: other
base_model: Qwen/Qwen2.5-Coder-7B-Instruct
tags: [text-to-sql, bird, spider, qlora, aegis-sql]
---
# Qwen25-Coder7B-Aegis-Text2SQL

QLoRA fine-tune of `Qwen/Qwen2.5-Coder-7B-Instruct` for Text-to-SQL, trained as the local-path
generator of the AEGIS-SQL hybrid system (three-axis constrained NL2SQL:
accuracy / cost / privacy).

- **Data**: 1,000 curated examples — 500 BIRD-train + 500 diversity-stratified
  Spider-train (set ops, HAVING, nested, multi-join rebalanced); splits 798/101/101.
- **Recipe**: 4-bit NF4 QLoRA, r=32 alpha=64, lr=0.0001,
  3 epochs, completion-only loss, max_seq_len=4096, seed=42.
- **Prompt format**: chat messages; user = `Database:` + schema (Tables + Foreign
  Keys) + `Question:` + `Return only SQL.`; assistant = bare SQL.
- **Quick proxy on held-out test**: see `quick_eval.json` in this repo.
  Full BIRD EX requires the official evaluator + databases.

Trained with the text2sql_aegis_experiment package (notebooks/qwen_aegis.ipynb).