lefred's blog


There Are 10 Types of People in the World....

HA for our website’s database in OCI with MySQL InnoDB Cluster

In the previous post, we setup a Drupal website with MySQL as backend on a different compute instance in a different subnet. Today we will increase the High Availability of our Database by transforming this single MySQL instance into a MySQL InnoDB Cluster!


MySQL Shell Plugins: InnoDB

Today, we will cover a totally different MySQL Shell plugin: InnoDB. Currently only 3 methods have been created: Those related to the Table space fragmentation, have already been covered in this recent article. Let’s discover the getAlterProgress()method. This method allows us to have an overview of the progress of some alter statements status like: stage/innodb/alter table (end) stage/innodb/alter table (flush) … Read More


MySQL: Check who’s trying to access data they should not

To illustrate how easy it’s to see who’s trying to access data they have not been granted for, we will first create a schema with two tables: mysql> create database mydata; mysql> use mydata mysql> create table table1 (id int auto_increment primary key, name varchar(20), something varchar(20)); mysql> create table table2 (id int auto_increment primary key, name varchar(20), something varchar(20)); … Read More


Join the Code ONE MySQL Track at Oracle Open World in San Francisco

Mid September, MySQL Community, MySQL Customers and MySQL Engineers will be in San Francisco to share their experience and present the new features of your favorite database ! The event will be held in Moscone South (just Mirko Ortensi‘s Hands-on Lab will be delivered in Moscone West). During the week, the MySQL Community Team will host the traditional MySQL Reception. … Read More


MySQL 8.0.16: how to validate JSON values in NoSQL with check constraint

As you may have noticed, MySQL 8.0.16 has been released today ! One of the major long expected feature is the support of CHECK contraints . My colleague, Dave Stokes, already posted an article explaining how this works. In this post, I wanted to show how we could take advantage of this new feature to validate JSON values. Let’s take … Read More


I deeply value the diversity of MySQL developers, users, community and my blog readers. I cannot agree the suffering, oppression, and systemic racism the Black community faces every day. Black lives matter.
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