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MySQL Optimization with Diesel CLI in Rust

This document outlines the process of setting up and using diesel_cli with MySQL in Rust, and discusses potential areas for optimization.

Using Diesel CLI with MySQL in Rust​

diesel_cli is an ORM (Object-Relational Mapping) framework that enables the generation of structs and DSL (Domain Specific Language) from SQL files. The following steps guide you through setting up and using diesel_cli with MySQL in your Rust project.

Step 1: Environment Setup​

Firstly, define the MYSQLCLIENT_LIB_DIR environment variable. The process varies depending on your platform:

  • Linux:

    export MYSQLCLIENT_LIB_DIR="your path to mysqlclient.lib"

  • Windows:

    setx MYSQLCLIENT_LIB_DIR "your path to mysqlclient.lib"

  • GitHub Actions on Windows:

    - run: echo "MYSQLCLIENT_LIB_DIR=C:\Program Files\MySQL\MySQL Connector C 6.1\lib\vs14" | Out-File -FilePath $env:GITHUB_ENV -Append

Note: If you do not only set the mysqlclient.lib file, it may result in duplicate library errors during compilation.

Step 2: Install Diesel CLI​

Install diesel_cli using the cargo command:

cargo install diesel_cli --no-default-features --features mysql

Step 3: Import Diesel into the Project​

Add the following dependencies to your Cargo.toml:

[dependencies]
# other dependencies
diesel = { version = "2.1.4", features = ["mysql", "r2d2"] }
r2d2 = "0.8.9"
r2d2-diesel = "1.0.0"

Step 4: Generate Structs with Diesel CLI​

Use diesel_cli to set up your database and generate migrations:

cd /path/to/project/root
diesel setup --database-url="mysql://[username:[password]]@[host:[port]]/[database]"
diesel migration generate your_sql_summary --database-url="mysql://[username:[password]]@[host:[port]]/[database]"
diesel migration run "mysql://[username:[password]]@[host:[port]]/[database]"

Run the unit test with mysqlbackend.

Potential Optimization Areas​

  • Establishing a TLS connection to MySQL
  • Connecting to PostgreSQL