SQLgateway-migration-mysql-IRIS

Sample repository to show how to migrate from mysql to InterSystems IRIS
using SQLgateway in difference to using an external tool as DBeaver or CloudBeaver or similar.

Warning

This is just JDBC/Java and IRIS with ISOS and SQL

• no AI, no Python, no other magic

Credits

Git>Hub package migration-mysql-iris
provided by YURI MARX PEREIRA GOMES
- Special thanks as this was an excellent base to start off.
And the official documentation on SQLgateway

Prerequisites

Make sure you have git and Docker desktop installed.

Installation

Clone/git pull the repo into any local directory

git https://github.com/r-cemper/SQLgateway-migration-mysql-IRIS.git

1. Build

docker-compose build

2. Run it in foreground. Sometimes container start is slower than estimated.

docker-compose up

• Wait for confirmation from your containers container: ready to accept connections

3. Connection to mysql:
   • host: container mysql
   • database: db
   • port: 3306
   • username: user
   • password: password
4. Connection to IRIS:
   • host: localhost
   • namespace: user
   • port: 41773
   • username: _SYSTEM
   • password: SYS
5. SQLgateway
   is installed during Docker build and the required
   jdbcdriver for Linux is included in this repo
   In order to make this demo faster, size of tables to migrate have been shrinked a bit.

How to test

SMP is available here
http://localhost:42773/csp/sys/UtilHome.csp

All migration actions can be executed directly from SMP.

1. Verify the gateway connection in
   SMP> Administration> Configuration> Connectivity> SqlGateway_Configuration
   

   • To test Connection click edit for cnection mysql
   • verify Connection successful
   • Be patient at this point. Some DB containers take quite some time to talk to you.
     wait a little bit, reload the page in browser and try the test again.

2. Identifying the source tables. In SMP > Change to Namespace USER
   then step to SMP >Explorers >SQL >Wizards > Data Migration
   

3. Set required import parameters

• Destination Namespace
• Type = TABLE
• Select a SQL Gateway connection: = mysql ; now the first connection is established and you select
• Schema = [null schema]
• Tables to migrate = all

4. Identify target but change schema to be OEX compatible from public to dc_public
   

• don’t forget to click change all
• we migrate Definitions and Data so both sides are selected

5. Skipping special setting we use defaults we start the task in background
   

6. Now we check the results and see everything was working without Errors
   You might see errors if tables depend on content not yet migrated.
   And wait for completions until the status shows Done

7. We terminate the Migration Wizard and return to normal table view filtered by dc*
   
   All 8 tables are visible and show meaningful columns

8. Selecting a table and clicking on OpenTable shows reasonable contents
   
   

9. A look into the related generated Class Defnitions confirms the result and successful completion.
   

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