As you may know by now, MySQL 8.0.2 DMR is out ! \o/

Many features have been added (see Geir Høydalsvik‘s announcement) and of course the replication also brought new features and improvements (see this post from Luís Soares).

But some improvements in the monitoring broke the added sys view used by ProxySQL to monitor the state of a member of the group:

mysql> select * from sys.gr_member_routing_candidate_status;
+------------------+-----------+---------------------+----------------------+
| viable_candidate | read_only | transactions_behind | transactions_to_cert | …

Today I presented MySQL InnoDB Cluster at the Helsinki MySQL User Group.

To demonstrate how easy it’s to deploy a cluster with MySQL Shell and used the prompt that will be part of a future release just because it’s beautiful.

If you also want to see how it looks like, just check the video below:

There were several MongoDB users in the audience and I got only very positive feedback, they were very surprised how easy it’s to deploy a MySQL InnoDB Cluster these days !

Taking a logical backup of a member of a Group Replication Cluster is not something very easy.

Currently (5.7.17, 5.7.18 or 8.0.0) if you want to use mysqldump to take a logical backup of your dataset, you need to lock all the tables on the member you are taking the dump. Indeed, a single transaction can’t be used as savepoints are not compatible with Group Replication.

[root@mysql3 ~]# mysqldump -p  --single-transaction --all-databases --triggers \
                      --routines --events >dump.sql
Enter password:
mysqldump: Couldn't execute 'SAVEPOINT sp': The MySQL server is running with the 
--transaction-write-set-extraction!=OFF option so it cannot execute this 
statement (1290)

So we need to use:

[root@mysql3 ~]# mysqldump -p  --lock-all-tables --all-databases --triggers \
                      --routines --events >dump.sql
Enter password:

This can have a negative effect on the full Group’s …

A few months ago I wrote about showing the hidden tables in MySQL 8 data dictionary. What I presented there was a naïve solution, which I am now able to improve with a few (bold) moves. In the solution given in my previous article, I was able to guess the table names somehow, but they were still hidden from the catalog. I did not think clearly then. I should have used the data dictionary itself to see the tables. Here, in addition to getting the real list of tables, I offer a feature to unhide them permanently.

MySQL-Sandbox 3.2.08 has now the ability of un-hide the data dictionary tables, and keep them available for inspection. This feature came to my mind after a chat with the MySQL team during PerconaLive 2017. They stressed the …

One of the most interesting features introduced in MySQL 8.0 is roles or the ability of defining a set of privileges as a named role and then granting that set to one or more users. The main benefits are more clarity of privileges and ease of administration. Using roles we can assign the same set of privileges to several users, and eventually modify or revoke all privileges at once.

Roles in a nutshell

Looking at the manual, we see that using roles is a matter of several steps.

(1) Create a role. The statement is similar to CREATE USER though the effects are slightly different (we will see it in more detail later on.)

mysql …

Yesterday I was invited to speak at the “Jeudis du Libre” in Mons.

The location was very special as it was in one auditorium of Polytech, the oldest university in the city of Mons.

I presented in French two very hot topics in the MySQL ecosystem:

• MySQL InnoDB Cluster
• MySQL as Document Store with JSON datatype & X plugin

Those are very new technologies illustrating MySQL’s innovation. And of course there is much more to come with MySQL 8 !

Here are the slides if you are interested:

Jeudis du Libre – MySQL InnoDB Cluster from Frederic Descamps

…

FOSDEM 2017 is over, I brought back home the flu…. but hopefully not only !

Indeed this 2017 edition was very rewarding. We started our FOSDEM with a “fringe” : pre-FOSDEM MySQL Day where we highlighted MySQL 8.0 new features and hosted some talks from MySQL friends.

This first edition of the pre-FOSDEM MySQL Day was a great success. We had up to 70 attendees! I would like to thanks all the speakers: Morgan Tocker, Bernt Marius Johnsen, Øystein Grøvlen, Kenny Gryp, Jean-François Gagné, Dag H. Wanvik, …

One of the talk will replaced in the schedule by a panel discussion moderated by Morgan Tocker on MySQL Group Replication & MySQL 8.0.

The panel list will be composed of

Kenny GrypRené CannaòØystein GrøvlenMark LeithFrédéric Descamps

These experts will answer questions from Morgan and from the audience.

Don’t miss this great opportunity to ask your questions and participate to this discussion about MySQL.

The schedule:

Let’s finish this pre-FOSDEM MySQL Day Sessions review week with Norvald Ryeng‘s talk on MySQL 8.0 and GIS.

As you know pre-FOSDEM MySQL Day will take place on Friday February 3rd in Brussels. During this day dedicated to MySQL and focusing on 8.0, Norvald will be on stage at 16.50 to check if you are ready for MySQL 8.0’s  GIS implementation.

Many great things are happening to GIS in MySQL 8.0. But in order to move forward, we also have to break legacy behavior. What will change? How? Why? And what can I do to avoid problems when I upgrade?

Join Norvald for a tour of changes and recommendations that you can start following today to make your data and applications ready for the future.
If …

On February 3rd, just before Fosdem and the MySQL & Friends Devroom, MySQL’s Community Team is organizing the pre-Fosdem MySQL Day.

Today we will review Dag H. Wanvik‘s session. Dag is spending most of his time implementing Windows Functions to MySQL.

Dag H. Wanvik is a senior MySQL developer for Oracle. Before he did Derby/Java DB development for Oracle/Apache Foundation and he is a Derby committer. He last co-authored JSON support for MySQL 5.7. In his previous existence Dag worked on several compilers and HA distributed data base systems.

The title of his session is MySQL 8.0: Window functions – finally!

Dag will share is current work on …