tokio-postgres
Low-level async PostgreSQL driver for Rust using Tokio. Provides raw connection management, query execution, prepared statements, and COPY protocol support. The foundation that SQLx and other higher-level Rust PostgreSQL libraries build on. Use directly when you need full control over PostgreSQL connection behavior without ORM or query-builder overhead.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Parameterized queries prevent SQL injection. TLS support available. Pure Rust — no OpenSSL dependency by default. PostgreSQL-level security controls apply.
⚡ Reliability
Best When
You need raw async PostgreSQL access in Rust with full protocol control — building database infrastructure or needing PostgreSQL-specific features not exposed by SQLx.
Avoid When
You want query building, type-safe queries, or connection pooling — SQLx provides better ergonomics; SeaORM for ORM patterns.
Use Cases
- • Connect directly to PostgreSQL from Rust async services with full control over connection lifecycle and prepared statements
- • Use PostgreSQL COPY protocol for ultra-fast bulk data loading in Rust data pipeline services
- • Implement custom connection pooling strategies on top of tokio-postgres without library constraints
- • Access PostgreSQL-specific features (advisory locks, LISTEN/NOTIFY, row streaming) not available in higher-level ORMs
- • Build Rust database middleware or connection pooling libraries on top of the raw postgres protocol
Not For
- • Teams wanting query-building or ORM abstractions — use SQLx or SeaORM for higher-level Rust PostgreSQL access
- • Connection pooling — tokio-postgres provides single connections; use deadpool-postgres or bb8 for pooling
- • Non-PostgreSQL databases — tokio-postgres is PostgreSQL-specific
Interface
Authentication
Authentication via PostgreSQL connection string (password, cert, SCRAM). Supports all PostgreSQL auth methods.
Pricing
MIT license. Community maintained.
Agent Metadata
Known Gotchas
- ⚠ tokio-postgres provides single connections — must pair with deadpool-postgres or bb8 for connection pooling in production services
- ⚠ Prepared statements are connection-scoped — statements prepared on one connection cannot be used on another; re-prepare per connection
- ⚠ The Client and Connection types must be driven independently — spawn Connection into a separate tokio task; forgetting this causes the client to hang
- ⚠ PostgreSQL type mapping requires implementing ToSql/FromSql — complex custom types need explicit trait implementations or use serde_json with JSONB
- ⚠ COPY protocol for bulk inserts is highly efficient but has a different API — use copy_in() stream for bulk loading, not regular execute()
- ⚠ TLS/SSL requires enabling the 'tls' feature and providing a TLS connector — not configured by default
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for tokio-postgres.
Scores are editorial opinions as of 2026-03-06.