db-explain-plan's Introduction

db-explain-plan

Contains the necessary sources to execute the explain plan

Prerequisite

Docker and Docker-compose must be installed into your system.

Installed version that I have used is:

$ docker --version                                                     
Docker version 20.10.21, build baeda1f

$ docker-compose --version
Docker Compose version v2.13.0

Steps to use

Open any of your favorite terminal (I have used zsh)
Clone the repo https://github.com/VikashChoudahry/db-explain-plan.git
Navigate to the directory "db-explain-plan/mysql"
Run: docker-compose up

Output: MySQL database must be up and running.

Connect to the Database

Open MySQL Workbench (have installed 8.0)
Click on MySQL connection(+ icon)
Used the following details to connect to the database:

Hostname: 127.0.0.1
Port: 3306
Username: root
Password: changeme (just for learning purpose. It has to be strong password if it's being used for any of the live project)

Output: You must be connected to the database with default schema(s).

Import Database Schema

Ensure that you are on Workbench.
Click on "Administration" tab within Workbench.
Select Data Import/Restore option
Select "Import from Self-Contained" file
Select the schema file from "db-explain-plan/schema/classicmodels.sql"
Select "Dump Structure and Data" from the dropdown (you may see at the bottom).
Select "Start Import"

Output: You must be seeing "classicmodels" database created.

How to open Entity-Relationship diagram

Open MySQL Workbench
Open classicmodels.mwb

Output: This will open ER diagram as a model in your MySQL workbench.

Summary

Related to the EXPLAIN, most of the details are added as part of the "db-explain-plan/docuementation/MySQL - Query Optimization Understanding.pdf" document.