Trilogy

Trilogy is a client library for MySQL-compatible database servers, designed for performance, flexibility, and ease of embedding.

It's currently in production use on github.com.

Features

• Supports the most frequently used parts of the text protocol

  • Handshake
  • Password authentication
  • Query, ping, and quit commands

• Low-level protocol API completely decoupled from IO

• Non-blocking client API wrapping the protocol API

• Blocking client API wrapping the non-blocking API

• No dependencies outside of POSIX, the C standard library & OpenSSL

• Minimal dynamic allocation

• MIT licensed

Limitations

• Only supports the parts of the text protocol that are in common use. There's no support for the binary protocol or prepared statements

• No support for LOAD DATA INFILE on local files

• trilogy_escape assumes an ASCII-compatible connection encoding

Building

make - that's it. This will build a static libtrilogy.a

Trilogy should build out of the box on most UNIX systems which have OpenSSL installed.

API Documentation

Documentation for Trilogy's various APIs can be found in these header files:

• blocking.h

  The blocking client API. These are simply a set of convenient wrapper functions around the non-blocking client API in client.h

• client.h

  The non-blocking client API. Every command is split into a _send and _recv function allowing callers to wait for IO readiness externally to Trilogy

• builder.h

  MySQL-compatible packet builder API

• charset.h

  Character set and encoding tables

• error.h

  Error table. Every Trilogy function returning an int uses the error codes defined here

• packet_parser.h

  Streaming packet frame parser

• protocol.h

  Low-level protocol API. Provides IO-decoupled functions to parse and build packets

• reader.h

  Bounds-checked packet reader API

Bindings

We maintain a Ruby binding in this repository. This is currently stable and production-ready.

License

Trilogy is released under the MIT license.