LowFile-scopeJava Plug & play

Review long transaction/query timeouts

Set sensible timeouts for queries/transactions and avoid excessively long timeouts that mask problems.

Why this matters

Prevents hung resources and surfaces backpressure quickly.

Side-by-side examples engineers can pattern-match during review.

Avoid

stmt.setQueryTimeout(0); // infinite

Prefer

stmt.setQueryTimeout(30); // seconds

Bad

no timeout set

Good

setQueryTimeout(30)

From the same buckets as this rule.

Critical
Block risky database migrations (locking ops, downtime risk)
Review SQL/database migrations for operations that can lock large tables or cause downtime. Examples: creating indexes without CONCURRENTLY (Postgres), ALTER COLUMN TYPE on big tables, adding NOT NULL without backfill, long-running updates without batching. Require an online migration strategy (CONCURRENTLY, backfill in batches, dual-write/expand-contract) and a rollback plan.
migrations-backward-compatdatabase-query-performance
High
Add database indexes for query optimization
Index frequently filtered or joined columns and verify with query plans.
database-query-performanceperformance-efficiency
High
Add database indexes for query performance
Index columns used in WHERE/JOIN/ORDER and enforce uniqueness where applicable.
database-query-performance