sql-sop 0.1.0

Fast rule-based SQL linter. Pre-commit hook + GitHub Action + CLI.

sql-guard

Fast, rule-based SQL linter. 15 rules. Zero config. Instant results.

Catches dangerous SQL before it reaches production -- DELETE without WHERE, SQL injection patterns, SELECT *, and 12 more. Runs as a CLI tool, pre-commit hook, and GitHub Action.

For deeper AI-powered analysis, pair with SQL Ops Reviewer.

---

Quick start

pip install sql-guard
sql-guard check .

queries/create_orders.sql
  L3:  ERROR [E001] DELETE without WHERE clause -- this will delete all rows
         -> Add a WHERE clause to limit affected rows
  L7:  WARN  [W001] SELECT * -- specify columns explicitly
         -> Replace with: SELECT col1, col2, col3 FROM ...

Found 2 issues (1 error, 1 warning) in 1 file (0.001s)

The two-layer SQL quality pipeline

Most teams have no SQL review process. Some use an AI linter. The problem: AI is slow, expensive, and overkill for catching DELETE FROM users;.

sql-guard and SQL Ops Reviewer solve this together:

                    ┌─────────────────────────────────────┐
                    │         YOUR SQL FILE                │
                    └──────────────┬──────────────────────┘
                                   │
          ┌────────────────────────┼────────────────────────┐
          │                        │                        │
          ▼                        │                        │
   LAYER 1: PRE-COMMIT             │              LAYER 2: CI
   ─────────────────               │              ──────────
   sql-guard                       │              SQL Ops Reviewer
                                   │
   When: before every commit       │              When: on every PR
   Speed: <0.2 seconds             │              Speed: 10-40 seconds
   How: regex pattern matching     │              How: Ollama LLM analysis
   Needs: nothing (pure Python)    │              Needs: 4-7 GB (AI model)
   Catches: 80% of issues          │              Catches: remaining 20%
                                   │
   ✓ DELETE without WHERE          │              ✓ wrong JOIN type
   ✓ SELECT *                      │              ✓ business logic errors
   ✓ SQL injection patterns        │              ✓ schema-aware suggestions
   ✓ missing LIMIT                 │              ✓ cross-table consistency
   ✓ DROP without IF EXISTS        │              ✓ performance rewrites
          │                        │                        │
          ▼                        │                        ▼
   commit blocked or passes        │              PR comment with findings
          │                        │                        │
          └────────────────────────┼────────────────────────┘
                                   │
                                   ▼
                         CLEAN SQL IN PRODUCTION

Layer 1 (sql-guard) is a smoke detector -- always on, instant, catches fire fast. Layer 2 (SQL Ops Reviewer) is a fire inspector -- thorough, comes on every PR.

You want both.

---

Set up the full pipeline (5 minutes)

Step 1: Pre-commit hook (Layer 1)

# .pre-commit-config.yaml
repos:
  - repo: https://github.com/Pawansingh3889/sql-guard
    rev: v0.1.0
    hooks:
      - id: sql-guard
        args: [--severity, error]  # only block on errors locally

pip install pre-commit
pre-commit install

Now every git commit with .sql changes runs sql-guard automatically. Errors block the commit. Warnings are shown but don't block.

Step 2: GitHub Actions (Layer 1 + Layer 2)

# .github/workflows/sql-quality.yml
name: SQL Quality
on:
  pull_request:
    paths: ['**/*.sql']

permissions:
  contents: read
  pull-requests: write

jobs:
  # Layer 1: fast rule check (~2 seconds)
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: Pawansingh3889/sql-guard@v1
        with:
          severity: warning

  # Layer 2: deep AI review (~30 seconds, runs after lint passes)
  review:
    needs: lint
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: Pawansingh3889/sql-ops-reviewer@v1
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}

That's it. Two files. Every SQL change gets:

1. Instant rule-based lint (sql-guard)
2. Deep AI review with fix suggestions (SQL Ops Reviewer)

Step 3 (optional): CLI for manual checks

pip install sql-guard

sql-guard check .                          # scan current directory
sql-guard check queries/ --severity error  # errors only
sql-guard check . --fail-fast              # stop on first error
sql-guard check . --disable E002 W008      # skip specific rules
sql-guard list-rules                       # show all 15 rules

---

Rules

Errors (block commit by default)

ID	Name	What it catches
E001	delete-without-where	DELETE FROM orders; -- deletes all rows
E002	drop-without-if-exists	DROP TABLE users; -- fails if table missing
E003	grant-revoke	GRANT SELECT ON users TO public; -- privilege escalation
E004	string-concat-in-where	WHERE id = '' + @input -- SQL injection
E005	insert-without-columns	INSERT INTO t VALUES (...) -- breaks on schema change

Warnings (advisory by default)

ID	Name	What it catches
W001	select-star	SELECT * FROM users -- pulls unnecessary columns
W002	missing-limit	Unbounded SELECT -- could return millions of rows
W003	function-on-column	WHERE YEAR(date) = 2024 -- kills index usage
W004	missing-alias	JOIN without table aliases -- hard to read
W005	subquery-in-where	WHERE x IN (SELECT ...) -- often slower than JOIN
W006	orderby-without-limit	ORDER BY without LIMIT -- sorts entire result
W007	hardcoded-values	WHERE amount > 10000 -- use parameters
W008	mixed-case-keywords	select ... FROM -- inconsistent casing
W009	missing-semicolon	Statement not terminated with ;
W010	commented-out-code	-- SELECT * FROM old_table -- use version control

---

Configuration

Disable specific rules

sql-guard check . --disable E002 W008 W010

Severity filtering

sql-guard check . --severity error    # only show errors
sql-guard check . --severity warning  # show everything (default)

Fail fast

sql-guard check . --fail-fast  # stop after first error found

---

Performance

sql-guard is designed to be fast:

• Compiled regex -- patterns compiled once at startup, reused per file
• Two-pass scanning -- single-line rules run first (10 of 15 rules), multi-line parsing only when needed
• Line-by-line streaming -- files read line by line, not loaded entirely into memory
• Early exit -- --fail-fast stops on first error

Benchmark: 200 SQL files, 15 rules
  sql-guard:  0.08 seconds
  sqlfluff:   45 seconds (560x slower)

---

How it compares

	sql-guard	sqlfluff	sql-lint
Rules	15 (focused)	800+ (comprehensive)	~20
Speed	<0.1s for 200 files	45s for 200 files	~2s
Config needed	Zero	Extensive	Minimal
Language	Python	Python	JavaScript
Pre-commit	Yes	Yes	No
GitHub Action	Yes	Community	No
AI integration	Pairs with SQL Ops Reviewer	No	No

sql-guard is not a replacement for sqlfluff. It's a fast first pass that catches 80% of real issues with zero setup. If you need dialect-specific formatting and 800 rules, use sqlfluff. If you want instant feedback on dangerous SQL, use sql-guard.

---

Contributing

git clone https://github.com/Pawansingh3889/sql-guard.git
cd sql-guard
pip install -e ".[dev]"
pytest

Adding a new rule

1. Create a class in sql_guard/rules/errors.py or warnings.py
2. Inherit from Rule, set id, name, severity, description
3. Override check_line() for single-line rules or check_statement() for multi-line
4. Add to ALL_RULES in sql_guard/rules/__init__.py
5. Add a test in tests/test_rules.py
6. Add a trigger case in tests/fixtures/

class MyNewRule(Rule):
    id = "W011"
    name = "my-rule"
    severity = "warning"
    description = "What this rule catches"
    multiline = False

    _pattern = Rule._compile(r"your regex here")

    def check_line(self, line, line_number, file):
        if self._pattern.search(line):
            return Finding(
                rule_id=self.id,
                severity=self.severity,
                file=file,
                line=line_number,
                message="What went wrong",
                suggestion="How to fix it",
            )
        return None

PRs welcome. Keep rules simple, keep patterns fast.

---

License

MIT