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MySQL Engineering Blogs

MySQL 8.0.1: [Recursive] Common Table Expressions in MySQL (CTEs), Part Four – depth-first or breadth-first traversal, transitive closure, cycle avoidance
CTEs and Recursive CTEs appeared in MySQL 8.0; first in a Labs release and now in the official release 8.0.1. Several blogs have been published: here, here and here ; my colleague Øystein also wrote about how using a CTE made one DBT3 query run twice faster.…

MySQL 8.0: When to use utf8mb3 over utf8mb4?
Long time MySQL users will recognize that there are two varieties of utf8 support in MySQL; utf8mb3 and utf8mb4.  Let me dig a little bit deeper in explaining the history between the two: MySQL 4.1 (2004) was the first version to support character sets and collations.…

MySQL 8.0: It’s doxygen time for MTR
Doxygen is a standard tool used for generating software reference documentation. Since the documentation is written within the code, it is relatively easy to keep it up to date. In MySQL 8.0.0, the MySQL source code was documented with Doxygen and now in MySQL 8.0.1, the MySQL Test Framework(MTR)...

MySQL InnoDB Cluster in Oracle Public Cloud: A Tutorial – Part 2
In the first part of this series you learned how to setup an InnoDB cluster using Oracle Cloud. In this second part, you are going to learn how and when to use some of the advanced functions available in MySQL Shell.…

Docker Images for MySQL Cluster
We’re constantly working to improve packaging and distribution of MySQL products. We have official Docker images for MySQL Server and we use Docker images to provide easy to use previews of upcoming and experimental setups and features in our products. Today we’re dockerizing another...

MySQL Cluster 7.6: The First Milestone
The first Development Milestone Release (DMR) of MySQL Cluster 7.6--7.6.2--is now available! You can see the full changelog for 7.6.2 here. But before we get into the specifics on 7.6.2, I'd  like to take a minute just to paint the bigger picture of where we want to go with MySQL...

Announcing MySQL Server 5.5.56
MySQL Server 5.5.56, new versions of the popular Open Source Database Management System, have been released. These releases are recommended for use on production systems. For an overview of what’s new, please see http://dev.mysql.com/doc/refman/5.5/en/mysql-nutshell.html For information on...

Group Replication support SAVEPOINT
Group Replication has been around as GA for some months now. Nonetheless, work continues and now we are happy to let you know that you can now use transaction savepoints when write-set extraction is enabled. This enhancement was released as in MySQL 8.0.1.…

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