Blob

When it comes to MariaDB/MySQL Database consulting engagements we often see, that our customers are very confused by many different technologies advertised to them.

Below you will find some simple concepts and ideas we use during our consulting engagements to solve some issues and answer some questions.

General problem solving approach

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  . Written description of the problem to solve. This helps to learn about your problem and better understand your problem.
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  . Searching for a suitable method, technology or …

We have sometimes discussions with our customers whether to store LOBs (Large Objects) in the database or not. To not rephrase the arguments again and again I have summarized them in the following lines.

The following items are more or less valid for all large data types (BLOB, TEXT and theoretically also for JSON and GIS columns) stored in a MySQL or MariaDB (or any other relational) database.

The idea of a relational table based data-store is to store structured data (numbers, data and short character …

A customer who is handling digital certificates had a problem with one of those. So we had to investigate.

Because the certificate is in binary form it is stored in a BLOB and we had to extract it from the database to do some verifications.

What first came to my mind was to extract the certificate with the SELECT INTO OUTFILE command. But the verification tool complained and told us that the certificate has a wrong format.

Luckily I found in the documentation the following statement: If you use INTO …

Introduction

In his presentation about PBXT at the DOAG Conference 2010 Paul McCullagh was speaking about memory resident PBXT tables. They will be available in version 1.1 of the PBXT Storage Engine Plugin. Memory resident PBXT tables should have similar characteristics like normal MySQL MEMORY</span> tables</a>. But in addition to the MEMORY tables they are transactional and can handle BLOB</span> and TEXT attributes.

An alternative to this feature would be the MySQL dynamic heap row …