10.8 preview feature: IN, OUT, INOUT, IN OUT parameters in CREATE FUNCTION

As an Oracle compatibility syntax extension, the IN, OUT, and INOUT / IN OUT quantifiers of stored function parameters was requested in MDEV-10654. It was noted that Postgres and DB2 also support this syntax. A few years later thanks to our community contributor Manohar KB of Rakuten Securities Japan, this functionality was created. Alexander Barkov from the MariaDB Corporation provided reviews and extended this PL/SQL syntax to be available in the non SQL_MODE=ORACLE mode of SQL/PSM.

Having OUT parameters on functions enables the nesting of functions will multiple return values where previously there was only the single return value possible.

Tricky Problems? MariaDB debug container

MariaDB does have bugs. Users see them sometimes. Sometimes developers look for a long time at bug reports and code and still cannot see how the situation occurred. Developers during their analysis ask questions like:

  • I wonder if this was already fixed in {not released version}? But how can I ask a user to test that?
  • Can I get the user to get good stack trace that would help understand this better? But users sometimes find this hard.
  • What exact hardware and kernel configuration is this bug occurring on? And how would I reproduce this?

New Service – quay.io/mariadb-foundation/mariadb-devel

During the development of MariaDB, a lot of things are tested. However the most important workload to be tested is the one we don’t have access to, and that is your workload.

As many of you run your own CI, we’d like you to invite you to join the testing of MariaDB. quay.io/mariadb-foundation/mariadb-devel is a container repository using the latest from our main stable branches. By the time any code gets into these branches it has been reviewed and passed our tests. The developers of the change consider it finished, so this is the perfect time to take this code and test it on your workload.

10.7 preview feature: InnoDB Bulk Insert

Everyone wants performance. Speeding up the insert into empty InnoDB tables and partitions is a common enough use case to optimize. Thirunarayanan Balathandayuthapani from the MariaDB Corporation wrote this improvement to the bulk inserting into InnoDB tables that is available as a preview for testing.

To achieve this, if the table is empty then InnoDB will pre-sort the records for each index, and build the indexes one page at a time. If the transaction does bulk insert operation then InnoDB should create buffer of size innodb_sort_buffer_size for each index.

If the buffer ran out of memory then InnoDB will create a temporary file for storing the data.

10.7 preview feature: UUID Data Type

Universally unique identifiers (UUIDs) have a common place in computing already. A 128-bit value with a text representational value and the prescription of a number of version types to ensure a uniqueness makes it an ideal data type.

After many years of the UUID datatype existing only as a feature request in MDEV-4958, slowly accumulating votes and watchers, we are pleased to announce a preview of the UUID data type. Like the INET6 data type, this uses the datatype plugin API from MariaDB 10.5.

What does the UUID data type look like?

Docker Library – Official MariaDB Image Maintenance

The Docker Library official MariaDB image is now maintained by the MariaDB Foundation, and has been for the last six months. If you didn’t notice, we’ll take that as a compliment, as the previous maintainers of Docker Library from Infosiftr were doing a good job already. Infosiftr still provide valuable quality assurance on the releases before they get to you.

What’s Changed?

What we have done, with assistance from you, our community, is:

Timezones

  • Continued the parting contribution by Infosiftr MARIADB_* environment names and added MARIADB_INITDB_SKIP_TZINFO for consistency.
  • Allowed the timezone to be changed.

MariaDB Server Fest 2021 – CFP – Make a submission

The Call for Papers for MariaDB Server Fest 2021 is open until the end of Sunday 22 August 2021. We’d like you to put in a submission.

MariaDB Server 10.6 hit Stable recently and the Server Engineering Team is quite proud of some of the innovation there. During the MariaDB Server Fest and we’ll be listening to some those.

The innovation that we’d like to hear from is yours. Users of MariaDB everywhere are applying innovation in the way they use MariaDB all the time. Your innovation may include new technologies integrated with MariaDB, new topographies, or new architectures, and presenting on how you have used these to solve the real problems would be ideal for our Server Fest.

Purge of End of Life versions from Mirrors

OSU Open Source Labs have supported MariaDB for many years in hosting the mirror from which we distribute our releases for which we are most grateful. We were asked if we could reduce the size as our mirror usage had grown to 1TB, rather high compared to other projects.

To accommodate this request we removed all of the end of life releases, 5.5, 10.0 and 10.1 from the mirrors halving the used space.

MariaDB space usage on OSU Open Source Lab mirror

It turns out there were some continuous integration systems still using these repositories.