There's a new JSON data type available in MySQL 5.7 that I've been playing with. I wanted to share some examples of when it's useful to have JSON data in your MySQL database and how to work with the new data types (not least so I can refer back to them later!)

MySQL isn't the first database to offer JSON storage; the document databases (such as MongoDB, CouchDB) work on a JSON or JSON-ish basis by design, and other platforms including PostgreSQL, Oracle and SQL Server also have varying degress of JSON support. With such wide adoption as MySQL has, the JSON features are now reaching a new tribe of developers.

Why JSON Is Awesome

Traditional database structures have us design table-shaped ways of storing all our data. As long as all your records (or "rows") are the same shape and have the same sorts of data in approximately the same quantities, this works brilliantly well. There are some common problems that aren't a good …

English: The Madrid MySQL Users Group is pleased to announce its next meeting on February 10th 2016 at 7pm at the offices of Tuenti in Gran Via, Madrid.  Morgan Tocker of Oracle will be visiting to give a talk on MySQL 5.7 and JSON as part of a European tour.  This will give you an an … Continue reading MMUG15: MySQL 5.7 & JSON

The post MMUG15: MySQL 5.7 & JSON first appeared on Simon J Mudd's Blog.

RDS for MySQL on AWS allows you to restore to any point in time for your backup retention period, minus the last 5 minutes or so. Restoration creates a new instance, it does not overwrite whatever instance you’re restoring. AWS’s use of the word restore is a bit confusing because restore often means “take your production database server and overwrite it with data from a backup”. As far as I can tell, Amazon never means this. When you restore, AWS creates another database server and writes all the data to the new instance, both when you’re using restoring to a point-in-time or from a DB snapshot. If you needed to switch servers, you’d have to point your database to the new instance.

Reference

When trying out new software there are many other questions you may ask and one of those is going to be the one above. The answer requires you to have built your software to capture and record low level database metrics and often the focus of application developers is slightly different: they focus on how … Continue reading Is MySQL X faster than MySQL Y? – Ask queryprofiler

The post Is MySQL X faster than MySQL Y? – Ask queryprofiler first appeared on Simon J Mudd's Blog.

MySQL 5.7 GA was released a couple of months ago now with 5.7.9 and 5.7.10 has been published a few days ago.  So far initial testing of these versions looks pretty good and both versions have proved to be stable. I have, however, been bitten by a couple of gotchas which if you are not … Continue reading A Couple of MySQL 5.7 gotchas to be aware of

The post A Couple of MySQL 5.7 gotchas to be aware of first appeared on Simon J Mudd's Blog.

Hello dear readers and attendees,

This is the post that I will be/ will have been referencing during my presentation to the Seattle Central Community College’s Byte club on Thursday, December 10th at 1500-1630.

I will begin with a bit of an autobio and find out what kind of students we have in attendance. Please feel free to comment if you’d like to keep in touch before or after the presentation. I will discuss some of the bits and pieces of some industry standard platforms which I’ve developed, deployed, maintained, managed, co-operated, administered and replaced. We can discuss some of the patterns that work well in the industry, and some that are a bit harder to tame.

Once we have touched most of the areas of specialization represented at the meeting, I will dive in to an AngularJS demo I am developing in github here:

…

Wikipedia says that “Relational calculus is essentially equivalent to first-order logic, and indeed, Codd’s Theorem had been known to logicians since the late 1940s.”  I couldn’t find the cited sources online, but did find these interesting papers:

“Applications of Alfred Tarski’s Ideas in Database Theory”

and

“Tarski’s influence on computer science.” (see the section starting “The final thing I want to tell something about is the connection of Tarski’s ideas and work with database theory.”)

If you’ve studied mathematical logic (or math, eg, topology), you are probably familiar with Tarski’s name.  The historical …

English: Madrid MySQL Users Group will be holding their next meeting on Tuesday, 10th November at 19:30h at the offices of Tuenti in Madrid. David Fernández will be offering a presentation “MySQL Automation @ FB”.  If you’re in Madrid and are interested please come along. We have not been able to give much advance notice so if … Continue reading MMUG14: MySQL Automation at Facebook

The post MMUG14: MySQL Automation at Facebook first appeared on Simon J Mudd's Blog.

The following presentation was given at the Oracle Technology Network (OTN) Latin America 2015 tour events in Uruguay, Argentina, Chile and Peru.

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In this presentation I talk about the various versions and means of installing and upgrading MySQL including:

• MySQL version history from 3.23 to 5.7.8
• Historical installation options
• Recommended use of Oracle yum repository for current version
• The installation and upgrade process, and errors that occur
• Compatibility changes between MySQL 5.5 and MySQL 5.6 including
  • Reserved words (and their true impact)
  • Legacy TIMESTAMP usage
  …

This past week I have been the sole MySQL representative on the Oracle Technology Network (OTN) Latin America 2015 tour events in Uruguay, Argentina, Chile and Peru.

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In this presentation I talk about the important steps for testing and verifying your MySQL backup strategy to ensure your business continuity in any disaster recovery situation. This includes:

• Overview of the primary product options
• Backup and recovery strategy considerations
• Technical requirements
• Common problems observed
• What about a failover strategy