# Change Log

## [Unreleased]

## [v0.4.0-rc.1] - 2019-05-03

### Changed

* The client API has been significantly overhauled. It now resembles `hyper`'s, with separate `Connection` and `Client`
    objects. See the crate-level documentation for more details.
* Connection string configuration now fully mirrors libpq's syntax, and supports both URL-style and key-value style
    strings.
* The TLS connection mode (e.g. `prefer`) is now part of the connection configuration rather than being passed in
    separately.
* The Cargo features enabling `ToSql` and `FromSql` implementations for external crates are now versioned. For example,
    `with-uuid` is now `with-uuid-0_7`. This enables us to add support for new major versions of the crates in parallel
    without breaking backwards compatibility.
* Upgraded from `tokio-core` to `tokio`.

### Added

* `FromSql` implementations can now borrow from the data buffer. In particular, this means that you can deserialize
    values as `&str`. The `FromSqlOwned` trait can be used as a bound to restrict code to deserializing owned values.
* Added support for channel binding with SCRAM authentication.
* Added multi-host support in connection configuration.
* The client now supports query pipelining, which can be used as a latency hiding measure.
* While the crate uses `tokio` by default, the base API can be used with any asynchronous stream type on any reactor.
* Added support for simple query requests returning row data.

### Removed

* The `with-openssl` feature has been removed. Use the `tokio-postgres-openssl` crate instead.
* The `with-rustc_serialize` and `with-time` features have been removed. Use `serde` and `SystemTime` or `chrono`
    instead.

## Older

Look at the [release tags] for information about older releases.

[Unreleased]: https://github.com/sfackler/rust-postgres/compare/tokio-postgres-v0.4.0-rc.1...master
[v0.4.0-rc.1]: https://github.com/sfackler/rust-postgres/compare/tokio-postgres-v0.3.0...tokio-postgres-v0.4.0-rc.1
[release tags]: https://github.com/sfackler/rust-postgres/releases