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sql-review

Testing & Quality
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Pre-merge SQL quality gate — lint 26 anti-patterns, grade readability/performance A-F, validate syntax, and scan for injection threats. Use before committing or reviewing SQL changes.

QUICK START

How to use this skill

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  3. Review the proposed files and risks before you approve installation.
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Source SKILL.md: https://github.com/AltimateAI/altimate-code/blob/HEAD/.opencode/skills/sql-review/SKILL.md

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First, summarize what it does, its dependencies, license status if identifiable, and any risks. Show the exact files you propose to add under .agents/skills/sql-review/. Do not write files or run scripts until I approve.

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Copying this prompt does not install or run the skill. Review third-party files before use. Codex skill guide

SQL Review

Requirements

Agent: any (read-only analysis) Tools used: altimate_core_check, altimate_core_grade, sql_analyze, read, glob, bash (for git operations)

When to Use This Skill

Use when the user wants to:

  • Review SQL quality before merging a PR
  • Get a quality grade (A-F) on a query or model
  • Run a comprehensive lint + safety + syntax check in one pass
  • Audit SQL files in a directory for anti-patterns

Do NOT use for:

  • Optimizing query performance -> use query-optimize
  • Fixing broken SQL -> use dbt-troubleshoot
  • Translating between dialects -> use sql-translate

Workflow

1. Collect SQL to Review

Either:

  • Read SQL from a file path provided by the user
  • Accept SQL directly from the conversation
  • Auto-detect changed SQL files from git:
git diff --name-only HEAD~1 | grep '\.sql
#x27;

For dbt models, compile first to get the full SQL:

altimate-dbt compile --model <name>

2. Run Comprehensive Check

Call altimate_core_check — this is the single-call code review that composes:

  • Syntax validation: Parse errors with line/column positions
  • Lint (26 anti-patterns): SELECT *, unused CTEs, implicit casts, NULL comparisons, missing WHERE on DELETE/UPDATE, cartesian joins, non-sargable predicates, missing partition filters, and more
  • Injection scan: Tautology attacks, UNION injection, stacked queries, comment injection, Jinja template injection
  • PII exposure: Flags queries accessing columns classified as PII
altimate_core_check(sql: <sql>, schema_context: <schema_object>)

3. Grade the SQL

Call altimate_core_grade to get an A-F quality score with per-category breakdown:

altimate_core_grade(sql: <sql>, schema_context: <schema_object>)

Categories scored:

  • Readability: Naming, formatting, CTE structure
  • Performance: Anti-patterns, index usage, scan efficiency
  • Correctness: NULL handling, join logic, type safety
  • Best Practices: Explicit columns, proper materialization hints

4. Run Anti-Pattern Analysis

Call sql_analyze for the detailed anti-pattern breakdown with severity levels and concrete recommendations:

sql_analyze(sql: <sql>, dialect: <dialect>)

5. Present the Review

SQL Review: <file_or_query_name>
==============================

Grade: B+ (82/100)
  Readability:  A  (clear CTEs, good naming)
  Performance:  B- (missing partition filter on large table)
  Correctness:  A  (proper NULL handling)
  Best Practices: C (SELECT * in staging model)

Issues Found: 3
  [HIGH]   SELECT_STAR — Use explicit column list for contract stability
  [MEDIUM] MISSING_PARTITION_FILTER — Add date filter to avoid full scan
  [LOW]    IMPLICIT_CAST — VARCHAR compared to INTEGER on line 23

Safety: PASS (no injection vectors detected)
PII: PASS (no PII columns exposed)

Verdict: Fix HIGH issues before merging. MEDIUM issues are recommended.

6. Batch Mode

When reviewing multiple files (e.g., all changed SQL in a PR):

  • Run the check on each file
  • Present a summary table:
| File | Grade | Issues | Safety | Verdict |
|------|-------|--------|--------|---------|
| stg_orders.sql | A | 0 | PASS | Ship |
| int_revenue.sql | B- | 2 | PASS | Fix HIGH |
| mart_daily.sql | C | 5 | WARN | Block |

Usage

  • /sql-review models/marts/fct_orders.sql -- Review a specific file
  • /sql-review -- Review all SQL files changed in the current git diff
  • /sql-review --all models/ -- Review all SQL files in a directory