| --- |
| license: cc-by-4.0 |
| language: |
| - en |
| pretty_name: "SREB: SQL Rewrite Evidence Benchmark" |
| tags: |
| - sql |
| - databases |
| - query-optimization |
| - text-to-sql |
| - evaluation |
| - reproducibility |
| size_categories: |
| - 10K<n<100K |
| task_categories: |
| - text-generation |
| - table-question-answering |
| configs: |
| - config_name: evidence |
| data_files: data/evidence/*.json |
| - config_name: runs |
| data_files: data/runs/*/*.json |
| - config_name: corpus |
| data_files: data/corpus/*.json |
| - config_name: states |
| data_files: data/states/states.json |
| --- |
| |
| # SREB: SQL Rewrite Evidence Benchmark |
|
|
| A dataset of **executable evidence** for SQL query rewrites proposed by language models. |
|
|
| Most SQL benchmarks ask *"write a query for this question"*. Most rewrite papers report a |
| success rate. SREB publishes something different: for every rewrite, **the database state |
| on which the result changes and the rows that prove it**. |
|
|
| ``` |
| reference [1,1,1,1] candidate [1,1,1] -> multiplicities lost |
| ``` |
|
|
| ## Why it is different |
|
|
| | Existing work | What it gives | Missing | |
| |---|---|---| |
| | Spider, BIRD | text-to-SQL evaluation | no rewrite validation | |
| | GenRewrite, R-Bot, LLM-R2 | success rates on benchmarks | no per-rewrite witness | |
| | Cosette, VeriEQL | formal proofs for supported SQL | coverage, and no run-level evidence | |
|
|
| SREB keeps the evidence, not the score. Every record is reproducible: database version, |
| model digest, sampling parameters, state profile, and the rows that differ. |
|
|
| ## What is inside |
|
|
| | Config | Content | |
| |---|---| |
| | `corpus` | query families: schema DDL, constraints, reference SQL, breaking profile | |
| | `states` | frozen state banks generated under the real schema constraints | |
| | `runs` | model responses with digest, quantization and sampling parameters | |
| | `evidence` | outcome per (family, model): status, refuting states, row witness | |
|
|
| Outcome values: `refuted`, `preserved`, `no_rewrite`, `unsupported`, `error`. |
|
|
| `preserved` means **no refuting state was found** on the finite bank. It is not a proof of |
| equivalence, and the dataset never claims otherwise. |
|
|
| ## Reproduce |
|
|
| ```bash |
| git clone https://github.com/ykvlev/sql-rewrite-evidence-bench |
| pip install -r scripts/requirements.txt |
| python scripts/check_corpus.py --repo-root . # hashes, pins, integrity |
| python scripts/recompute_tables.py --repo-root . # rebuild summary tables |
| ``` |
|
|
| Every published number is recomputable from `data/` without rerunning a model. |
|
|
| ## Scale (v0.3.0) |
|
|
| - query families: **204** across three schemas (library, online shop, university) |
| - frozen states: **5 712** (28 profiles per family) |
| - model runs: **1 224** (6 models × 204 evaluated families) |
| - evidence: **204 families**, evaluated on MySQL 8.4.11 |
| - total checks: **34 272** (model × family × state) |
| - models: Qwen2.5-Coder-7B, Qwen2.5-7B, Qwen2.5-3B, Phi-3.5-mini-3.8B, |
| DeepSeek-Coder-V2, Llama-3.2-3B |
|
|
| Cross-DBMS check: the schemas and the 136 library/shop reference queries execute |
| on PostgreSQL 16.15 without modification; on the 12 seed families the reference results and |
| candidate classifications match MySQL exactly (0 divergences over 336 state pairs). The |
| university schema has not been ported yet. |
|
|
| ## Limitations |
|
|
| - Synthetic schemas: coverage of real workloads is partial. |
| - A finite state bank cannot prove equivalence. |
| - Witnesses are **not minimised**: the recorded state is the first one that refuted the |
| candidate, not the smallest possible. |
| - Model behaviour changes across engine versions; the engine version is part of the record. |
| The six models span Ollama 0.40.4–0.40.6. |
| - Small models can return invalid SQL: 23 answers are `unsupported` and 33 are `error` of |
| 1 224 (recorded, not retried). |
|
|
| ## Licence |
|
|
| Data and documentation: CC BY 4.0. Code: MIT. |
|
|
| ## Citation |
|
|
| ```bibtex |
| @dataset{yakovlev_sreb, |
| title = {SREB: SQL Rewrite Evidence Benchmark}, |
| author = {Yakovlev, Artem}, |
| year = {2026}, |
| note = {ORCID 0009-0006-8617-7895}, |
| url = {https://github.com/ykvlev/sql-rewrite-evidence-bench} |
| } |
| ``` |
|
|
