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PostgreSQL Code Review

PostgreSQL代码评审

Quick Reference

快速参考

Issue Type	Reference
Missing indexes, wrong index type, query performance	references/indexes.md
JSONB queries, operators, GIN indexes	references/jsonb.md
Connection leaks, pool configuration, timeouts	references/connections.md
Isolation levels, deadlocks, advisory locks	references/transactions.md

问题类型	参考文档
缺失索引、索引类型错误、查询性能问题	references/indexes.md
JSONB查询、操作符、GIN索引	references/jsonb.md
连接泄漏、池配置、超时	references/connections.md
隔离级别、死锁、咨询锁	references/transactions.md

Review Checklist

评审检查清单

WHERE/JOIN columns have appropriate indexes
Composite indexes match query patterns (column order matters)
JSONB columns use GIN indexes when queried
Using proper JSONB operators (
```
->
```
,
```
->>
```
,
```
@>
```
,
```
?
```
)
Connection pool configured with appropriate limits
Connections properly released (context managers, try/finally)
Appropriate transaction isolation level for use case
No long-running transactions holding locks
Advisory locks used for application-level coordination
Queries use parameterized statements (no SQL injection)

WHERE/JOIN列拥有合适的索引
复合索引匹配查询模式（列顺序很重要）
查询JSONB列时使用GIN索引
使用正确的JSONB操作符（
```
->
```
,
```
->>
```
,
```
@>
```
,
```
?
```
）
连接池配置了合适的限制
连接已正确释放（使用上下文管理器、try/finally）
为场景配置合适的事务隔离级别
不存在持有锁的长事务
使用咨询锁进行应用级协调
查询使用参数化语句（避免SQL注入）

When to Load References

何时查阅参考文档

Reviewing SELECT queries with WHERE/JOIN → indexes.md
Reviewing JSONB columns or JSON operations → jsonb.md
Reviewing database connection code → connections.md
Reviewing BEGIN/COMMIT or concurrent updates → transactions.md

评审带WHERE/JOIN的SELECT查询 → indexes.md
评审JSONB列或JSON操作 → jsonb.md
评审数据库连接代码 → connections.md
评审BEGIN/COMMIT或并发更新 → transactions.md

Review Questions

评审问题

Will this query use an index or perform a sequential scan?
Are JSONB operations using appropriate operators and indexes?
Are database connections properly managed and released?
Is the transaction isolation level appropriate for this operation?
Could this cause deadlocks or long-running locks?

该查询会使用索引还是执行全表扫描？
JSONB操作是否使用了合适的操作符和索引？
数据库连接是否得到正确管理和释放？
事务隔离级别是否适合该操作？
这是否会导致死锁或长期持有锁？