The Ultimate Guide to High Availability with MariaDB

MariaDB 10.0.18 Release Notes

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Note: This page describes features in the source repository for MariaDB 10.0. There are currently no official packages or binaries available for download which contain the features. If you want to try out any of the new features described here you will need to get and compile the code yourself.

MariaDB 10.0 is the current stable series of MariaDB. It is an evolution of the MariaDB 5.5 with several entirely new features not found anywhere else and with backported and reimplemented features from MySQL 5.6.

MariaDB 10.0.18 will be a Stable (GA) release.

For an overview of MariaDB 10.0 see the What is MariaDB 10.0? page.

Thanks, and enjoy MariaDB!

Notable Changes

Parser

  • Column was quoted with backticks in a function, in a HAVING clause, and it wasn't recognised - fixed now (MDEV-7301).
  • Alter table with conflicting CHARACTER SET and CONVERT TO CHARACTER SET now reports error (MDEV-7386).
  • Fixed Regression (from 10.0.14): Bit and hex string literals changed column names (MDEV-7629).

Optimizer

  • Merged derived tables/VIEWs incorrectly increment created_tmp_tables (MDEV-7586).
  • TODO - Stalled - Assertion in subselects in queries run twice in the same connection (MDEV-7445).

Innodb

  • In Debug builds, an assertion could be triggered on really large blobs (MDEV-7754).
  • Fixed segfault when a virtual column used on a innodb table and an index was created on a field after the virtual column (MDEV-7367).
  • Fixed server crash when inserting more rows than available space on disk (MDEV-7685).
  • Make it possible to get innodb internal primary key for wrapper type storage engines (MDEV-7714).

Replication

  • Starting with this release, commits in certain instances in parallel replication complete immediately, avoiding losing throughput when many transactions need conflicting locks. See binlog_commit_wait_count (MDEV-7847).
  • Fixed temporary tables lost at STOP SLAVE in GTID mode if master has not rotated binlog since restart (MDEV-6403).
  • Incorrect relay log start position when restarting SQL thread after error in parallel replication (MDEV-6589).
  • Slave is 10x slower to execute set of statements compared to master when using RBR (MDEV-7578).
  • Parallel replication worker threads are not spawned until needed (when an SQL thread is started), and they will be de-spawned if all SQL threads are stopped (MDEV-5289).
  • Multilevel slaves with parallel replication - better logic resulted in performance increase to group more transactions at the first slave level resulting in increased parallelism at the second replication level (MDEV-7249).

Platforms

  • PowerPC - fixed Innodb locking issue under high load - (MDEV-7148).
  • BigEndian fails to build in cassandra storage engine (MDEV-7839).

Connect Engine

  • CONNECT Engine Column names are not retrieved properly when field values are not latin1 characters (MDEV-7521).
  • Connecting to missing remote table caused error that was re-reported when SHOW TABLES STATUS on a correctly formed table (MDEV-7636).

Test

  • mysql-test-run creates nested links when tests are run with --mem (MDEV-7643).
  • buildbot may leave stale mysqld (MDEV-7659).
  • Fixed test suite failure - mysql-test - SUITE:percona - percona.innodb_sys_index 'xtradb' fails - @@version_comment (MDEV-7692)

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