Swanhart-Tools includes FlexCDC, a change data capture tool for MySQL. FlexCDC follows a server’s binary log and usually writes “changelogs” that track the changes to tables in the database. I say usually because the latest version of Swanhart-Tools (only in github for now) supports FlexCDC plugins, which allow you to send the updates to a remote data source, or to any other place of your liking.  You can find out more about FlexCDC basics in a previous blog post.

Please note that FlexCDC still needs to have source and destination instances defined in the configuration, even when using plugins.  This is because the FlexCDC state (how much into which …

While doing some testing (that I published later here) on the still-in-development MySQL 5.7 I wanted to do some analysis on the configuration to see if the changes in performance were due to the code changes or just to the new MySQL defaults (something that is very common in the migration from 5.5 to 5.6 due to the default transaction log size and other InnoDB parameters). This is a quick post aiming to identify the global variables changed between these two versions.

You could tell me that you could just read the release notes, but my experience (and this is not an exception, as you will see) …

The need to have multiple instances of MySQL (the well-known mysqld process) running in the same server concurrently in a transparent way, instead of having them executed in separate containers/virtual machines, is not very common. Yet from time to time the Percona Support team receives a request from a customer to assist in the configuration of such an environment. MySQL provides a tool to facilitate the execution of multiple instances called mysqld_multi:

“mysqld_multi is designed to manage several mysqld processes that listen for connections on different Unix socket files and TCP/IP ports. It can start or stop servers, or report their current status.”

For tests and development purposes, …

The need to have multiple instances of MySQL (the well-known mysqld process) running in the same server concurrently in a transparent way, instead of having them executed in separate containers/virtual machines, is not very common. Yet from time to time the Percona Support team receives a request from a customer to assist in the configuration of such an environment. MySQL provides a tool to facilitate the execution of multiple instances called mysqld_multi:

“mysqld_multi is designed to manage several mysqld processes that listen for connections on different Unix socket files and TCP/IP ports. It can start or stop servers, or report their current status.”

For tests and development purposes, …

MySQL team attends and speaks at the MOSC 2014 on September 24-25, 2014 in Kuala Lumpur, Malaysia. We are having a MySQL booth and above that our local colleague Ricky Setyawan has secured one 45 minutes talk scheduled for Wed, Sep 24 @2:15-3:00pm on the MySQL Web Reference Architecture.

We will also run two hours workshop on MySQL Fabric scheduled for Thursday, Sep 25 @2:30-4:30pm. If you are around do not forget to come to our booth and/or visit our MySQL session & workshop!

SELECT...INTO can be used to store the single row column result value from a query to be used in another query depending on that value.

"accounts" table

+--------------+-------------+------+-----+---------+----------------+
| Field        | Type        | Null | Key | Default | Extra          |
+--------------+-------------+------+-----+---------+----------------+
| account_id   | int(11)     | NO   | PRI | NULL    | auto_increment |
| account_name | varchar(50) | NO   |     | NULL    |                |
| balance      | float       | …

In a previous post, my colleague Dimitri Vanoverbeke discussed at a high level the concepts of database as a service (DBaaS), OpenStack and OpenStack’s implementation of a DBaaS, Trove. Today I’d like to delve a bit further into Trove and discuss where it fits in, and who benefits.

Just to recap, Trove is OpenStack’s implementation of a database as a service for its cloud infrastructure as a service (IaaS). And as the mission statement declares, the Trove project seeks to provide a scalable and reliable cloud database service providing functionality for both relational and non-relational database engines. With the current release of Icehouse, the technology has begun to show maturity providing both stability and a rich feature set. …

In a previous post, my colleague Dimitri Vanoverbeke discussed at a high level the concepts of database as a service (DBaaS), OpenStack and OpenStack’s implementation of a DBaaS, Trove. Today I’d like to delve a bit further into Trove and discuss where it fits in, and who benefits.

Just to recap, Trove is OpenStack’s implementation of a database as a service for its cloud infrastructure as a service (IaaS). And as the mission statement declares, the Trove project seeks to provide a scalable and reliable cloud database service providing functionality for both relational and non-relational database engines. With the current release of Icehouse, the technology has begun to show maturity providing both stability and a rich feature set.

…

Just released - the all new MySQL Cluster training course.

This MySQL Cluster training teaches you how to install and configure a real-time database cluster at the core of your application. Expert instructors will teach you how to design and maintain your clusters for high availability and scalability by using MySQL Cluster's open-source and enterprise components.

This 4-day training course is a must for those who want to learn about MySQL Cluster as you will not only learn about the concepts and features but you will get extensive hands-on experience. You can follow this training course from your own desk via a live-virtual training or by traveling to an education center to follow this course.

Be the first to influence the schedule for this …

Loops -> Repetitive tasks

3 types of loops in MySQL stored program:
- Simple loop using LOOP and END LOOP clauses
- WHILE and END WHILE clauses that runs while a condition is true
- REPEAT  and UNTIL clauses that runs until a condition is true



Termination of loop -> LEAVE statement.

I will demonstrate the use of loops the simple loop way.

Simple counter from 1 to 10:

Store below stored procedure in a file named my_loop.sql

DELIMITER $$

DROP PROCEDURE IF EXISTS my_loop$$

CREATE PROCEDURE my_loop()
BEGIN
    …