AgentSkillsCN

debugging-orm-queries

将ORM调用转换为原始SQL并分析查询性能。检测N+1查询、缺失索引和其他反模式。在调试慢查询、追踪ORM生成的SQL，或优化Sequelize、Prisma、TypeORM（Node.js）、GORM、sqlc、sqlx、ent（Go），或SQLAlchemy、Django ORM、Peewee（Python）的数据库性能时使用。

SKILL.md
--- frontmatter
name: debugging-orm-queries
description: Converts ORM calls to raw SQL and analyzes query performance. Detects N+1 queries, missing indexes, and other anti-patterns. Use when debugging slow queries, tracing ORM-generated SQL, or optimizing database performance for Sequelize, Prisma, TypeORM (Node.js), GORM, sqlc, sqlx, ent (Go), or SQLAlchemy, Django ORM, Peewee (Python).

Debugging ORM Queries

References

LanguageORMsReference
Node.jsSequelize, Prisma, TypeORMreferences/nodejs.md
GoGORM, sqlc, sqlx, entreferences/golang.md
PythonSQLAlchemy, Django, Peeweereferences/python.md
Anti-patternsN+1, indexes, paginationreferences/anti_patterns.md

Scripts

bash
# Pretty-print SQL
python scripts/sql_formatter.py "SELECT..."

# Detect N+1, missing WHERE, duplicates from log file
python scripts/query_analyzer.py queries.log [--json]

# Parse EXPLAIN output (PostgreSQL or MySQL)
psql -c "EXPLAIN ANALYZE ..." | python scripts/explain_parser.py --postgres
mysql -e "EXPLAIN FORMAT=JSON ..." | python scripts/explain_parser.py --mysql

# Node.js request-scoped query tracking (see script for setup)
# Integrates with Sequelize, Prisma, TypeORM

Quick Patterns

Enable logging: Check reference for ORM-specific config (usually logging: true or echo=True)

ORM → SQL: Enable logging, run query, capture output

SQL → ORM: Map clauses to methods:

  • •SELECT columns → specify fields/attributes
  • •WHERE → where/filter with operators
  • •JOIN → include/preload/prefetch_related
  • •ORDER BY → order/orderBy
  • •LIMIT/OFFSET → limit/offset or cursor-based

Performance issues: Run query_analyzer.py on logs, check anti_patterns.md for solutions