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This guide is intended to show how you can land your first Pull Request (PR) in Rust to contribute to TiKV in less than 30 minutes. But before we do that, here's some helpful background.

At the crack of dawn on February 1, I landed in Brussels, Belgium, for the first time in my life. The goal of my trip wasn't to taste the local cuisine, tour world-famous museums, or grab a pint of the local brew. It was to deliver a talk three days later at FOSDEM 2018 Rust Devroom about our experience at PingCAP using Rust to build TiKV, a distributed transactional Key-Value storage engine.

On January 20th, 2018, more than 200 coders, hackers, and techies streamed into Garage Café, a chic coffee shop in the heart of Beijing's techhub, Zhongguancun. They were there to be part of TiDB DevCon 2018, a technology party for the developers, by the developers!

In order to accelerate expression evaluation, we recently refactored its framework. This tutorial will show you how to use the new computational framework to rewrite or add a built-in function in TiDB.

TiDB code is updated and the procedure of adding built-in functions is greatly simplified. This document describes how to add built-in functions to TiDB.