News - 16 series#

Release 16.15 - 2026-10-23#

Note

In this release, we do not provide Mroonga packages for Debian trixie for MySQL 8.4 and 9.7. Currently, the Mroonga packages for Debian trixie cannot be installed with MySQL 8.4 and 9.7 due to a dependency issue. For details, refer to https://bugs.mysql.com/bug.php?id=120697. We will provide them again when this issue is resolved upstream.

Improvements#

Added support for the latest versions of the following RDBMSs#

  • MySQL Community Server 8.4 LTS (8.4.13)

  • MySQL Community Server minimal 8.4 LTS (8.4.13)

  • MySQL Community Server 9.7 LTS (9.7.4)

  • MySQL Community Server minimal 9.7 LTS (9.7.4)

Don’t register mroonga_command() by default#

[MDEV-41376][Reported by Roel Van de Paar]

mroonga_command() bypasses the privilege control of MySQL/MariaDB. So it should not be registered on a multi-user system that relies on privilege separation of accounts.

But install.sql and update.sql always registered it. Packages run them on install and upgrade, so a dropped mroonga_command() came back on upgrade.

This moves mroonga_command() registration to the new install_mroonga_command.sql. Users who need it can use the file manually.

However, we don’t drop existing mroonga_command() on upgrade because users may use it.

Fixes#

Fixed returning wrong result with index_merge intersection#

[GH-1264][Reported by kotaokubo-nd]

Mroonga returned wrong result with index_merge intersection as below:

CREATE TABLE items (
  id INT PRIMARY KEY,
  category CHAR(1),
  state CHAR(1),
  KEY category (category),
  KEY state (state)
) ENGINE = Mroonga DEFAULT CHARSET=utf8mb4;

INSERT INTO items
  WITH RECURSIVE seq(n) AS (SELECT 1 UNION ALL SELECT n + 1 FROM seq WHERE n < 254)
  SELECT n, '1', '0' FROM seq;
INSERT INTO items VALUES (255, '3', '1');
INSERT INTO items VALUES (256, '3', '0');

SELECT /*+ INDEX_MERGE(items category, state) */ *
  FROM items
 WHERE category = '3' AND state = '0';

Thanks#

  • Roel Van de Paar

  • kotaokubo-nd

Release 16.12 - 2026-10-02#

Note

In this release, we do not provide Mroonga packages for Debian trixie for MySQL 8.4 and 9.7. Currently, the Mroonga packages for Debian trixie cannot be installed with MySQL 8.4 and 9.7 due to a dependency issue. For details, refer to https://bugs.mysql.com/bug.php?id=120697. We will provide them again when this issue is resolved upstream.

Improvements#

MariaDB 12.3 is now supported in this release#

Dropped support for the following RDBMSs#

They have reached EOL.

  • MariaDB 10.6 for AlmaLinux 8,9

  • MariaDB 10.6 for Ubuntu 22.04

  • Percona Server 8.0 for AlmaLinux 8,9

Building Mroonga from source with MariaDB now requires a C++17-compatible compiler#

Fixes#

Fixed a buffer overflow with long mroonga_database_path_prefix#

[MDEV-41287][Reported by Yuelin Wang]

Setting a path that was too long in mroonga_database_path_prefix could cause a buffer overflow.

Fixed automatic creation of database directories for absolute mroonga_database_path_prefix#

The database directory could not be created automatically when an absolute path, such as “/var/lib/mroonga/”, was set for mroonga_database_path_prefix.

Fixed a heap buffer overflow on escaped string in table/index COMMENT parameter#

[MDEV-41285][Reported by Alice Sherepa][Found by Yuelin Wang]

Setting a escaped string such as “\x” in the COMMENT parameter could cause a heap overflow.

For example, the following SQL caused a heap buffer overflow:

CREATE TABLE t1 (c INT) ENGINE=Mroonga COMMENT='engine "InnoDB\\x"';

Fixed double processing of escape characters in index COMMENT parameters#

Escape characters were processed twice when set in index COMMENT parameters. For example:

  • “Token\Delimit” was parsed as “TokenDDelimit”

  • “x\ny” was parsed as “x”, a newline and “ny”

  • “TokenNgram(“loose_symbol”, true)” was parsed as “TokenNgram(” because the escaped “. Parameters after it were also ignored.

Thanks#

  • Alice Sherepa

  • Yuelin Wang

Release 16.11 - 2026-09-02#

Note

In this release, we do not provide Mroonga packages for Debian trixie for MySQL 8.4 and 9.7. Currently, the Mroonga packages for Debian trixie cannot be installed with MySQL 8.4 and 9.7 due to a dependency issue. For details, refer to https://bugs.mysql.com/bug.php?id=120697. We will provide them again when this issue is resolved upstream.

Improvements#

Added support for the latest versions of the following RDBMSs#

  • MariaDB 10.11 (10.11.19)

  • MariaDB 11.4 (11.4.13)

  • MariaDB 11.8 (11.8.9)

  • Percona Server for MySQL 8.4 (8.4.11-11)

  • MySQL Community Server 8.0 (8.0.46-0ubuntu0.22.04.4, 8.0.46-0ubuntu0.24.04.4)

  • MySQL Community Server minimal 9.7 LTS (9.7.2)

Release 16.09 - 2026-08-14#

Note

In this release, we do not provide Mroonga for Debian trixie package for MySQL 8.4 and 9.7. Currently, the Mroonga for Debian trixie package cannot be installed with MySQL 8.4 and 9.7 due to a dependency issue. For details, refer to https://bugs.mysql.com/bug.php?id=120697. We will provide them again when this issue is resolved upstream.

Improvements#

Added support for MySQL Community Server 9.7 LTS in the following OS#

  • Ubuntu 22.04(Jammy Jellyfish) and 24.04(Noble Numbat)

Added support for MySQL Community Server 8.4.11 in the following OS#

  • Ubuntu 22.04(Jammy Jellyfish) and 24.04(Noble Numbat)

Added support for MariaDB 10.6.28 in the following OS#

  • AlmaLinux 8 and 9

  • Ubuntu 22.04(Jammy Jellyfish)

Fixes#

Fixed a bug that could cause Mroonga to crash on any error when opening an index#

GH-1138[Reported by Jérome Perrin and Kazuhiko]

GH-1139[Patched by Jérome Perrin]

If any error occured when opening a index, Mroonga could crash while handring the error.

Thanks#

  • Jérome Perrin

  • Kazuhiko

Release 16.08 - 2026-08-04#

Note

In this release, we do not provide Mroonga APT packages for MySQL 8.4. Currently, the Mroonga APT packages cannot be installed with MySQL 8.4.10 due to a dependency issue. For details, refer to https://bugs.mysql.com/bug.php?id=120697. We will provide them again when this issue is resolved upstream.

Improvements#

Added support for MySQL Community Server 9.7 LTS in the following OS#

  • AlmaLinux 8, 9, and 10.

Added support for MySQL Community Server 8.4.11 in the following OS#

  • AlmaLinux 8, 9, and 10.

Release 16.07 - 2026-06-30#

Note

In this release, we do not provide Mroonga APT packages for MySQL 8.4. Currently, the Mroonga APT packages cannot be installed with MySQL 8.4.10 due to a dependency issue. For details, refer to https://bugs.mysql.com/bug.php?id=120697. We will provide them again when this issue is resolved upstream.

Improvements#

Added support for MySQL 8.0.46-0ubuntu0.22.04.3 on Ubuntu 22.04#

This is the latest MySQL 8.0.46 package for Ubuntu 22.04.

Added support for MySQL 8.0.46-0ubuntu0.24.04.3 on Ubuntu 24.04#

This is the latest MySQL 8.0.46 package for Ubuntu 24.04.

Added support for Percona Server for MySQL 8.4.10-10 in the following OS#

  • AlmaLinux 9, 10

8.4.10-10 is the latest Percona Server for MySQL 8.4 release.

Dropped support for MySQL Community Server 8.0 distributed via Oracle’s official repository#

It reached EOL at 2026-04-30. This is unrelated to the Ubuntu distributed MySQL 8.0.46 packages added above.

Release 16.05 - 2026-06-19#

Note

In this release, we do not provide Mroonga APT packages for MySQL 8.4. Currently, the Mroonga APT packages cannot be installed with MySQL 8.4.10 due to a dependency issue. For details, refer to https://bugs.mysql.com/bug.php?id=120697. We will provide them again when this issue is resolved upstream.

Improvements#

Added support for MariaDB 10.6.27 in the following OS#

  • AlmaLinux 8, 9

Added support for MariaDB 10.11.18 in the following OS#

  • AlmaLinux 8, 9, 10

Added support for MariaDB 11.4.12 in the following OS#

  • AlmaLinux 8, 9, 10

Added support for MariaDB 11.8.8 in the following OS#

  • AlmaLinux 8, 9, 10

Added support for MySQL 8.0.46 in the following OS#

  • Ubuntu 22.04, 24.04

Added support for MySQL 8.4.10 in the following OS#

  • AlmaLinux 8, 9, 10

Added support for Percona Server for MySQL 8.0.46-37 in the following OS#

  • AlmaLinux 8, 9

Dropped support for Debian 12#

It reached EOL at 2026-06-10.

Release 16.01 - 2026-03-30#

Improvements#

Added support for Percona Server for MySQL 8.0.45-36 in the following OS#

  • AlmaLinux 8, 9

8.0.45-36 is the latest Percona Server for MySQL 8.0 release.

Added support for Percona Server for MySQL 8.4.8-8 in the following OS#

  • AlmaLinux 9, 10

8.4.8-8 is the latest Percona Server for MySQL 8.4 release.

Added support for MariaDB 11.8.6 on Debian 13#

This is the latest MariaDB 11.8 release.

Dropped support for engine "XXX" in CONNECTION for wrapper mode#

[MDEV-38530][Reported by Roel Van de Paar]

Mroonga accepted engine "XXX" for wrapper mode not only in COMMENT but also in CONNECTION. However, this behavior was neither documented nor tested, so support for it has been removed.

Fixes#

Fixed a crash bug that occurred when mroonga_log_file was set NULL or an empty string#

[GH-1069][Patched by Hadeer Ramadan]

Setting NULL or an empty string as shown below caused a SIGSEGV.

SET GLOBAL mroonga_log_file = NULL;

SET GLOBAL mroonga_log_file = '';

Thanks#

  • Hadeer Ramadan

  • Roel Van de Paar

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