MariaDB 10.3 Changes & Improvements

MariaDB 10.3 is no longer maintained. Please use a more recent release.

The most recent release of MariaDB 10.3 is:MariaDB 10.3.39 Stable (GA) Download Now

MariaDB 10.3 is a previous major stable version. The first stable release was in May 2018, and it was maintained until May 2023.

For details on upgrading from MariaDB 10.2, see .

MariaDB Server 10.3 is included in MariaDB TX 3.0. Watch the webinar recording to learn more about the new features included in this release.

The following lists the major new features in MariaDB 10.3:

Implemented Features

• ()

Syntax / General Features

• (also known as AS OF) ()

• () — GSoC 2017 project by Galina Shalygina

• () — GSoC 2017 project by Galina Shalygina

Compatibility

• As a result of implementing Table Value Constructors, the has been renamed to VALUE() ()

• When running with , the server now understands a subset of Oracle's PL/SQL language instead of the traditional MariaDB syntax for stored routines. See , and to know the current status.

• New , EMPTY_STRING_IS_NULL.

Compression

• () — Tencent Game DBA Team, developed by willhan, also thanks to AliSQL.

• On Linux, shrink the core dumps by omitting the InnoDB buffer pool ()

Encryption

• Temporary files created by merge sort and row log are encrypted if is set to 1, regardless of whether the table encrypted or not ().

Optimizer/Performance

• Condition pushdown through PARTITION BY clause of ()

• New was introduced.

• Numerous performance improvements for high-concurrency load

Storage Engines

InnoDB

• now has a new mode, 3, which skips the rollback of connected transactions ()

Spider

The has been updated to 3.3.13. The partitioning storage engine has been updated to support all the new Spider features including:

• Direct join support. This allows Spider to do JOINS and GROUP BYs internally.

• Direct update and delete.

• Direct aggregates.

Most of the features were done as part of .

OQGRAPH

• now supports the "leaves" algorithm () — contribution by Heinz Wiesinger

Partition Engine

• Numerous improvements for the partition engine () — contribution by Kentoku Shiba

  • Full text support.

  • Multi-range-read (Gives better performance when handling multiple ranges).

Information Schema

• The Information Schema is optimized to use much less memory when selecting from or any other table with many or columns ()

• The now displays info in the EXTRA column -

Logging

• Disable logging of certain statements to the or the with the and system variables.

• A new option to , filsort_priority_queue.

Replication

• Per-engine mysql.gtid_slave_pos tables () — Implemented by Kristian Nielsen funded by Booking.com.

Data Type API

10.3 continues refactoring for the data type API started in 10.2, which will make it possible to have user data type plugins. This work is still in progress (see for the current status and subtasks). Most of the task in this category do not change the server behavior. Some tasks do have a .

Idle Transactions

Connections with idle transactions can be automatically killed after a specified time period by means of the , and system variables.

System Variables

For a list of all new variables, see and .

• New system variable .

• New system variable for restricting the direct setting of a session timestamp ()

• is enabled by default ()

Security Vulnerabilities Fixed in

For a complete list of security vulnerabilities (CVEs) fixed across all versions of MariaDB, see the page.

• :

• :

• :

Comparison with MySQL

List of All Releases

See Also

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