UDF: MariaDB/MySQL User Defined Functions in Rust

This crate aims to make it extremely simple to implement UDFs for SQL, in a way that is as safe as possible.

UDF Theory

Basic SQL UDFs consist of three exposed functions:

• An initialization function where arguments are checked and memory is allocated
• A processing function where a result is returned
• A deinitialization function where anything on the heap is cleaned up

This wrapper simplifies the process so that you only need to worry about checking arguments and performing the task.

• Create a struct or enum that will be shared across initialization and processing (if there is nothing, just create an empty struct)