debugging-orm-queries

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).
metadata	{"author":"galihcitta"}

Debugging ORM Queries

References

Language	ORMs	Reference
Node.js	Sequelize, Prisma, TypeORM	references/nodejs.md
Go	GORM, sqlc, sqlx, ent	references/golang.md
Python	SQLAlchemy, Django, Peewee	references/python.md
Anti-patterns	N+1, indexes, pagination	references/anti_patterns.md

Scripts

# 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

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