Tag: data type

We are concluding our series related to new data types using the Type_handler framework, with some limitations that are not yet covered by the framework:

It would have been handy for our MONEY datatype to have the possibility to define, for example, the currency to show. Or the format to have something like this:

Unfortunately, we can’t create new field attributes for our data type. As you probably already know, a column has an extra attribute called COMMENT. We can […]

This is part 4 of a series related to extending MariaDB with a custom data type using the Type_handler framework.

You can find the previous articles below:

Overriding Existing Types

In the previous examples, our MONEY data type inherits from DOUBLE and then we override some methods.

But all the methods of every type cannot be overridden. For example, if we would like to change how the money column is sorted, we would have to override the Field_double::sort_string() method. But […]

In the previous article, we wrote, compiled, and tested our first custom data type for MariaDB using the Type_handler framework.

But currently, aside from allowing the use of its new name (MONEY) and listing it in the metadata, our new data type behaves exactly like a DOUBLE, the class it inherits from.

In this article, we will extend our data type just a bit by transforming the result into a VARCHAR and adding a currency sign to it: the dollar […]

After having discovered the Type_hander framework and learned how to build MariaDB Server from source, it’s time to code our first data type!

We will create a MariaDB plugin that registers a new MONEY type and instantiates a custom field object.

Our component won’t be exciting, but we want to understand how to use the framework and test it.

We want to prove that

Everything else comes later.

Step 1: start with a minimal build file

The very first step […]

Welcome to this new series about extending MariaDB. This series covers the addition of a new data type using the Type_handler.

The goal of the entire series is to create a new plugin data type MONEY to store and display amounts with currency.

Something like:

Of course, the ultimate goal is to teach how to add data types in MariaDB, and we expect to see how creative our community developers are!

This is Part 0 – Build MariaDB from the […]