MariaDB 10.4 is the current major development version, so major new features will be going into 10.4.

Implemented Features

InnoDB

Optimizer

Variables

General

  • The obsolete mysql.host table is no longer created (MDEV-15851)
  • Support of brackets (parentheses) for specifying precedence in UNION/EXCEPT/INTERSECT operations (MDEV-11953)
  • Crash safe Aria-based system tables (MDEV-16421)
  • Added Linux abstract socket support (MDEV-15655)
  • Enabled C++11 (MDEV-16410)
  • SET PASSWORD support for ed25519 and other authentication plugins (MDEV-12321)
  • Performance improvements in Unicode collations (MDEV-17534, MDEV-17511, MDEV-17502, MDEV-17474)
  • User data type plugins (MDEV-4912, in progress)
  • Improvements with SQL standard INTERVAL support to help functions TIMESTAMP() and ADDTIME() return more predictable results.
    • Historically, MariaDB uses the TIME data type for both "time of the day" values and "duration" values. In the first meaning the natural value range is from '00:00:00' to '23:59:59.999999', in the second meaning the range is from '-838:59:59.999999' to '+838:59:59.999999'.
    • To remove this ambiguity and for the SQL standard conformance we plan to introduce a dedicated data type INTERVAL that will be able to store values in the range at least from '-87649415:59:59.999999' to '+87649415:59:59.999999', which will be enough to represent the time difference between TIMESTAMP'0001-01-01 00:00:00' and TIMESTAMP'9999-12-31 23:59:59.999999'.
    • As a first step we support this range of values for intermediate calculations when TIME-alike string and numeric values are used in INTERVAL (i.e. duration) context, e.g. as the second argument of SQL functions TIMESTAMP(ts,interval) and ADDTIME(ts,interval), so the following can now be calculated:
SELECT ADDTIME(TIMESTAMP'0001-01-01 00:00:00', '87649415:59:59.999999');
-> '9999-12-31 23:59:59.999999'  

SELECT TIMESTAMP(DATE'0001-01-01', '87649415:59:59.999999')
-> '9999-12-31 23:59:59.999999'  

SELECT ADDTIME(TIME'-838:59:59.999999', '1677:59:59.999998');
-> '838:59:59.999999'  

List of All MariaDB 10.4 Releases

DateReleaseStatusRelease NotesChangelog
9 Nov 2018MariaDB 10.4.0AlphaRelease Notes

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