Data migration with the nmig tool

NMIG is an app, intended to make a process of migration from MySQL to PostgreSQL as easy and smooth as possible. It has been written in the TypeScript language and is run on Node.js 10 or higher.

Visit the link for more information: https://github.com/AnatolyUss/NMIG

Installation

Download and install Node.js 10 or higher: https://nodejs.org/en/

Clone and checkout the nmig tool:

git clone https://github.com/AnatolyUss/nmig.git 
cd nmig 
git checkout v5.5.0

Configuration

The main configuration script is config.json:

nano config/config.json

If we need to configure a source and target, we can update sections:

"source": {
  "host": "localhost",
  "port": 3306,
  "database": "test_db",
  "charset": "utf8mb4",
  "supportBigNumbers": true,
  "user": "root",
  "password": "0123456789"
}
"target": {
  "host"     : "localhost",
  "port"     : 5432,
  "database" : "test_db",
  "charset"  : "UTF8",
  "user"     : "postgres",
  "password" : "0123456789"
}

If we need to rename either a table name, column or foreign keys, we should activate an extra config:

"enable_extra_config" : false

The extra configuration script is extra_config.json:

nano config/extra_config.json

To rename names we can update sections:

"tables" : [
  {
    "name": {
      "original": "salary",
      "new": "renamed_salary"
    },
    "columns": [
      {
        "original": "id",
        "new": "renamed_id"
      },
      {
        "original": "employee_id",
        "new": "renamed_employee_id"
      }
    ]
  },
  {
    "name": {
      "original": "contract",
      "new": "renamed_contract"
    },
    "columns": [
      {
        "original": "id",
        "new": "renamed_id"
      }
    ]
  }
]

Usage

Install and run:

npm install 
npm run build 
npm start

Enjoy!

Originally published at https://github.com.