---
title: SQL Debugger Environment
emoji: 🔧
colorFrom: blue
colorTo: green
sdk: docker
pinned: false
app_port: 8000
license: mit
short_description: SQL Query Debugger - OpenEnv RL Environment
tags:
  - openenv
---

# SQL Debugger — OpenEnv Environment

An RL environment where an AI agent receives broken SQL queries and attempts to fix them, scored with partial credit.

## Environment Description

The SQL Debugger simulates a real-world task: debugging broken SQL queries. Given a buggy query, database schema, and expected output, the agent must produce a corrected query. This models a genuine developer workflow — reading error messages, understanding schema, and iteratively fixing queries.

## Action Space

```python
@dataclass
class SQLAction(Action):
    corrected_query: str  # The agent's fixed SQL query
```

## Observation Space

```python
@dataclass
class SQLObservation(Observation):
    broken_query: str           # The buggy SQL to fix
    schema: list                # CREATE TABLE statements
    description: str            # Hint about what's wrong
    expected_output: list       # What the correct query should return
    actual_output: list | None  # What the agent's query returned
    score: float                # Partial credit score (0.0 - 1.0)
    error_message: str | None   # Error if the agent's SQL crashed
    done: bool                  # Whether the episode is over
    attempts_left: int          # Remaining attempts
```

## Tasks

9 tasks across 3 difficulty levels:

| Difficulty | Count | Bug Type | Example |
|-----------|-------|----------|---------|
| Easy | 3 | Syntax errors | Typos: SELCT, FORME, ORDRE |
| Medium | 3 | Logic errors | Wrong JOIN type, wrong WHERE filter, wrong GROUP BY |
| Hard | 3 | Subtle multi-table bugs | Wrong threshold, missing DISTINCT, global vs per-category average |

## Reward Function

Partial credit scoring with 5 levels:

| Score | Criteria |
|-------|----------|
| 0.0 | Query doesn't parse |
| 0.2 | Parses (EXPLAIN works) |
| 0.4 | Runs without error |
| 0.6 | Correct number of columns |
| 0.8 | Correct number of rows |
| 1.0 | Exact match with expected output |

## Setup

```bash
# Install dependencies
pip install -r requirements.txt

# Run the environment server locally
uvicorn server.app:app --host 0.0.0.0 --port 8000

# Run inference (requires LLM API access)
export HF_TOKEN=your_token_here
python inference.py
```

## Docker

```bash
docker build -t sql-debugger .
docker run -p 8000:8000 sql-debugger
```

## Baseline Scores

Baseline agent (Qwen2.5-72B-Instruct) with 3 attempts per task. Scores vary per run due to LLM non-determinism.