We saw in the previous post how we can deal with data stored in the new VECTOR datatype that was released with MySQL 9.0. We implemented the 4 basic mathematical operations between two vectors. To do so we created JavaScript functions. MySQL JavaScript functions are available in MySQL HeatWave and MySQL Enterprise Edition (you can […]

A couple of weeks ago, my colleague Marco Tusa published an important announcement titled “Do Not Upgrade to Any Version of MySQL After 8.0.37.” The announcement highlighted a critical issue in MySQL 8.0.38, MySQL 8.4.1, and MySQL 9.0.0 that caused database server crashes. Good news! The upcoming minor releases for the community edition of MySQL and […]

We saw in the previous post how we can deal with data stored in the new VECTOR datatype that was released with MySQL 9.0. We implemented the 4 basic mathematical operations between two vectors. To do so we created JavaScript functions. MySQL JavaScript functions are available in MySQL HeatWave and MySQL Enterprise Edition (you can […]

MySQL 9.0.0 has brought the VECTOR datatype to your favorite Open Source Database. There are already some functions available to deal with those vectors: This post will show how to deal with vectors and create our own functions to create operations between vectors. We will use the MLE Component capability to create JavaScript functions. JS […]

MySQL 9.0.0 has brought the VECTOR datatype to your favorite Open Source Database. There are already some functions available to deal with those vectors: This post will show how to deal with vectors and create our own functions to create operations between vectors. We will use the MLE Component capability to create JavaScript functions. JS […]

pt-online-schema-change is an amazing tool for assisting in table modifications in cases where ONLINE ALTER is not an option. But if you have foreign keys, this could be an interesting and important read for you. Tables with foreign keys are always complicated, and they have to be handled with care. The use case I am […]

Introduction # I recently encountered an intriguing bug. A user reported that their query was causing vtgate to fetch a large amount of data, sometimes resulting in an Out Of Memory (OOM) error. For a deeper understanding of grouping and aggregations on Vitess, I recommend reading this prior blog post. The Query # The problematic query was: selectsum(user.type)fromuserjoinuser_extraonuser.team_id=user_extra.idgroupbyuser_extra.idorderbyuser_extra.id;The planner was unable to delegate aggregation to MySQL, leading to the fetching of a significant amount of data for aggregation.

MySQL 9.0 is an Innovation Release, but as you may have read in my Quick Peek, I found little innovation. However, one new item caught my eye, and it could be a way to track query performance. MySQL 9.0 EXPLAIN enhancement Here is the syntax that will be referenced in the post. {EXPLAIN | DESCRIBE […]

In this article, we will demonstrate how to have a single MySQL database user account that can connect from specific hosts. We would usually implement it by creating separate user accounts with the same username but different hosts/IPs like <USER>@<HOST1>, <USER>@<HOST2> …. <USER>@<HOSTn>. Then, give those users the same grants(privileges/roles) and settings(password, SSL, etc). Instead […]

MySQL is certainly a powerful open source database management system, but even the most robust engine struggles when queries take an eternity to execute. For DBAs and developers, improving MySQL query performance is an ongoing goal. Efficient query performance is crucial for ensuring the smooth operation and optimal user experience of applications powered by MySQL […]