Mroonga blog


Mroonga 14.04 has been released!

Mroonga is a MySQL storage engine that supports fast fulltext search and geolocation search. It is CJK ready. It uses Groonga as a storage and fulltext search engine.

Mroonga 14.04 has been released!

This is long time no release!


Here are important changes in this release:


  • We support for OS as below.

    • Ubuntu 24.04 (Noble Numbat)
  • We support for MySQL, MariaDB, and Percona Server as below.

  • We dropped support for OS as below.

    • Amazon Linux 2
    • CentOS 7
    • Debian GNU/Linux 11 (bullseye)
  • We dropped support for MySQL, MariaDB, and Percona Server as below.

    • MySQL Community Server 5.7
    • Percona Server 5.7
    • MariaDB 10.4、10.7、10.8、10.9、10.10
  • Added functionality to output an error when Mroonga's UDF is used while Mroonga is uninitialized. [MDEV-21166][Reported by Ian Gilfillan.]

    Before this fix, using Mroonga's UDF without initializing Mroonga (not having run INSTALL PLUGIN mroonga) would cause a crash. This patch changes the output from a crash to logging an error.


  • Wrapper mode Fixed memory leaks in cases where engines not supporting online DDL are wrapped.

    In general, DDL operations like ALTER TABLE block access to the target table while in progress to maintain exclusive control. However, some storage engines allow operations on the target table during these operations (they can also be executed exclusively). The capability to operate on a table during such DDL operations is referred to as online DDL.

    The issue addressed occurs when wrapping storage engines that do not support online DDL in Mroonga's wrapper mode. It does not occur in storage mode or when using a combination of wrapper mode + InnoDB.

  • Storage mode Fixed a bug causing crashes when inserting into tables with compressed VARCHAR or TEXT columns. [MDEV-31966][Reported by Elena Stepanova.]

    This issue occurs only in storage mode and not in wrapper mode.


  • Ian Gilfillan
  • Elena Stepanova


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