To further advance the MySQL Retrospective in anticipation of the 30th Anniversary, today, let’s discuss the very first version of MySQL that became availble to a wide audient though the popular InfoMagic distribution: MySQL 3.20! In 1997, InfoMagic incorporated MySQL 3.20 as part of the RedHat Contrib CD-ROM (MySQL 3.20.25). Additionally, version 3.20.13-beta was also […]

To further advance the MySQL Retrospective for the Advent Calendar in anticipation of the 30th Anniversary, today, let’s discuss the very first version of MySQL that became availble to a wide audient though the popular InfoMagic distribution: MySQL 3.20! In 1997, InfoMagic incorporated MySQL 3.20 as part of the RedHat Contrib CD-ROM (MySQL 3.20.25). Additionally, […]

For today’s retrospective post on the MySQL Advent Calendar 2024, we will examine the MySQL Certifications. MySQL AB released certifications in 2002 as you can see in the following announcement: For a long time, the two exams were proposed and maintained. I remember when I passed my first one, you first needed to validate the […]

In this series, “MySQL with Diagrams,” I’ll use diagrams to explain internals, architectures, and structures as detailed as possible. In basic terms, here’s how replication works: the transactions are written into a binary log on the source side, carried into the replica, and applied. The replica’s connection metadata repository contains information that the replication receiver […]

So, as you’ve noticed, I’ve been playing around with MySQL Router v8.4.3 and read-write splitting, and now I’ve come across some issues that my environment has generated and I’ve opened some bugs against the fiend:

Bug 116950 – Router Read-Write splitting config causes PHP RSET_HEADER error

Bug 116951 – mysqlrouter Error parsing stats_updates_frequency errors

Bug 116952 – Router w/ RW split causes ERROR: 4501 if sql script contains comments lines (“– “)

(Yup, I prepared each bug description, repeatable tasks and suggested fix …

This tutorial explores HeatWave GenAI, a cloud service that simplifies interacting with unstructured data using natural language. It combines large language models, vector stores, and SQL queries to enable tasks like content generation, chatbot, and retrieval-augmented generation (RAG). The focus is on RAG and how HeatWave GenAI’s architecture helps users gain insights from their data.

The post Simplifying AI Development: A Practical Guide to HeatWave GenAI’s RAG & Vector Store Features first appeared on dasini.net - Diary of a MySQL expert.

Did you know that in previous versions of MySQL there were some “hidden” functions that not many users knew about? One of them disappeared on the 16th of October 2012 with the release of 5.6.8rc. Did you find which one it was? SHOW AUTHORS SHOW AUTHORS was last present in 5.6.7rc and displayed a list […]

MySQL HeatWave, an Oracle Cloud service, delivers high-performance query processing, efficiently manages large data volumes, and combines transactional and analytical processing within the same system. This article highlights its key features and benefits.

The post MySQL HeatWave: Real-Time Analytics and High-Performance Data Processing appeared first on Devart Blog.

I’m just trying out the v8.4 Read-Write configuration for MySQL Router, that comes default in the community edition and, as they say, TL;DR “it’s default upon bootstrap”.

What does this mean and how can I go about it?

The overview is simple:

• Either install or upgrade your existing MySQL Router to v8.4 at least.
• Bootstrap the Router.
• Use the port 3310 or change it to fit your needs.

Let’s get to it:

Stop your running router:

systemctl stop mysqlrouter

Copy the old config, just in case:

cp /etc/mysqlrouter/mysqlrouter.conf /etc/mysqlrouter/mysqlrouter_v80.conf

I normally keep my mysql linux repository disabled so no “yum update” takes over version control and gives me a nasty surprise afterwards. As so, I uncomment the “mysql” entry:

vi /etc/yum.conf …

TL;DR ALTER TABLE and OPTIMIZE TABLE on an InnoDB table, which rebuilds the table without blocking concurrent changes to it (i.e., executed using INPLACE algorithm) and concurrent DML or purge activity on the table can occasionally lead to two significant problems: ALTER/OPTIMIZE TABLE failing with an unnecessary duplicate key error (even though there are no […]