Release Notes for MariaDB Enterprise Server 10.6.18-14


MariaDB Enterprise Server 10.6.18-14 is a maintenance release of MariaDB Enterprise Server 10.6.

MariaDB Enterprise Server 10.6.18-14 was released on 2024-06-11.

Fixed Security Vulnerabilities

CVE (with link)

CVSS base score



Notable Changes

  • Galera has been updated to 26.4.18

  • Changes to the use of the variable optimizer_adjust_secondary_index_costs (MDEV-33306)

    • The default of the variable optimizer_adjust_secondary_index_costs changed from "0" to "" and is now of type ENUM

    • The variable can now be set to a combination of the following values separated by a ',':

      • adjust_secondary_key_cost: Update secondary key costs for ranges to be at least 5x of clustered primary key costs.

      • disable_max_seek: Disable 'max_seek optimization' for secondary keys and slight adjustment of filter cost.

      • disable_forced_index_in_group_by: Disable automatic forced index in GROUP BY and make GROUP BY cost based instead of rule based. ALL Sets all of the above values.

    • Without changes in configuration or using the old integer values 0, 1, 2 for optimizer_adjust_secondary_key_costs this system variable works as before. This is to ensure that we do not break any existing applications.

Changes in Storage Engines

  • This release incorporates MariaDB ColumnStore engine version 23.10.1.

Issues Fixed

Can result in data loss

  • With --gtid-ignore-duplicate set a transaction can be double-applied from another replication source if at applying the transaction from the initial source required retrying in parallel execution. (MDEV-33475)

  • Backups of server with innodb_encrypt_tables=1 can become corrupted in mariadb-backup --prepare (MDEV-33334)

  • With multiple GTID domains, optimistic parallel slave conflicts involving XA-PREPARE event group could not be resolved correctly which might cause unnecessary stop of the slave serve. (MDEV-34042)

  • The TIMESTAMP value of '1970-01-01 00:00:00' can be inserted via a INSERT ...FROM ... SELECT in strict mode although it should result in an error (MDEV-34088)

  • Galera-replicated events can in some cases contain the wrong time when versioning is used (MDEV-18590)

  • wrong row targeted with insert ... on duplicate and replace, leading to data corruption (MDEV-30046)

Can result in hang or crash

  • Using current MariaDB Enterprise Backup against an older server can result in a crash, as the system variable @@aria_log_dir_path does not exist (MDEV-31251)

  • When using a non-default setting for innodb_change_buffering, the server can crash (MDEV-33332)

  • When a fulltext search query with more than 4G inserted or updated rows is executed, the server can crash (MDEV-33383)

  • InnoDB is holding shared dict_sys.latch while waiting for FOREIGN KEY child table lock on DDL (MDEV-32899)

  • InnoDB may hang when temporarily running out of buffer pool (MDEV-33613)

  • For encrypted table spaces an ALTER operation can hang when an encryption thread works on the same tablespace (MDEV-33770)

  • EXPLAIN statement that uses a subquery which has a query plan that A) will examine less than @@expensive_subquery_limit rows and B) will use join buffer could cause a crash. (MDEV-21102)

  • For a SPIDER table, when deleting partitions from a table, the server can crash (MDEV-33731)

  • After an unsuccessful ALTER TABLE on an ARIA table due to a full temp space, any subsequent query results in the following error if it involves using temp: (MDEV-33813)

    ERROR 1021 (HY000): Disk full (./org/test1.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
  • When replaying a binary log with mariadb-binlog, the tool can crash if the binary log includes statements related to sequences, like SELECT NEXTVAL(s) (MDEV-31779)

  • MariaDB Enterprise Backup fails with the following error message if the prepare step of the backup encounters a data directory which happens to store wsrep xid position in TRX SYS page: (MDEV-33540)

    InnoDB: Crash recovery is broken due to insufficient innodb_log_file_size
  • Assertion failure when a client disconnected during transaction that is in the XA PREPARE state or when incomplete transaction was recovered from undo logs on server startup and not yet rolled back (MDEV-33278)

  • Failure with the following error message when streaming transaction in idle state is BF aborted: (MDEV-33509)

    WSREP: Failed to apply write set with flags = (rollback | pa_unsafe)
  • Assertion when user commits an empty transaction for DDL that was killed during certification: (MDEV-32787)

    !wsrep_has_changes(thd) || (thd->lex->sql_command == SQLCOM_CREATE_TABLE && !thd->is_current_stmt_binlog_format_row()) || thd->wsrep_cs().transaction().state() == wsrep::transaction::s_aborted
  • MDL lock conflict can occur if the transactions acquire explicit MDL locks from the InnoDB level when persistent statistics is re-read for a table and such a transaction is subject to BF-abort (MDEV-33136)

  • Graceful node shutdown can crash garbd and MariaDB Enterprise Cluster can go non-primary when SSL is used (MDEV-33495)

Can result in unexpected behavior

  • Wrong result sets are returned by the second execution of prepared statements from selects using mergeable derived tables pushed into external engine (MDEV-31361)

  • IMPORT TABLESPACE fails with column count or index count mismatch: (MDEV-30655)

    ERROR 1808 (HY000): Schema mismatch (Number of columns don't match, table has x columns but the tablespace meta-data file has y columns)
  • A query that uses a derived table that employs constructs with side-effects, like (SELECT @var:=... ) as derived_tbl, could produce wrong results (MDEV-30975)

  • ORDER BY COLLATE improperly applied to non-character columns which is resulting in an unordered result set (MDEV-33318)

  • Inconsistent behaviors of UPDATE under Read Uncommitted & Read Committed isolation level (MDEV-26643)

  • When two transactions modify the data at the same time with isolation level REPEATABLE-READ, the latter transaction does take the change from the first transaction into account (MDEV-26642)

  • Spider/ODBC passed double quotes for names, in ANSI style (MENT-958)

  • Default charset doesn't work with PHP MySQLi extension (MDEV-32975)

  • Bad SEPARATOR value in GROUP_CONCAT on character set conversion can lead to a wrong result (MDEV-33772)

  • Spider returns parsing failure on valid left join select by translating the on expression to () (MDEV-33679)

  • When creating a temporary InnoDB table with CREATE TEMPORARY TABLE ... AS SELECT ... from an InnoDB table as a non SUPER / READ ONLY ADMIN user, the following error is shown instead of creating the table: (MDEV-33889)

    ERROR 1290 (HY000): The MariaDB server is running with the --read-only option so it cannot execute this statement
    • CREATE TEMPORARY TABLE (without SELECT), INSERT ... SELECT, and CREATE ... LIKE are not affected by this bug

  • Phantom rows caused by UPDATE of PRIMARY KEY (MDEV-32898)

  • Mariadb-dump trusts the server and does not validate the data. A modified dump file can include system commands used by the mariadb-client. Dumps are now loaded in the sandbox mode by default, a system call will result in an error (MDEV-33727)

  • Updating a case insensitive large unique key with an insensitive change of the value can result in a duplicate key error (MDEV-29345)

  • When setting binlog_annotate_row_events=1, an event of binlog file can be truncated (MDEV-9179)

  • Wrong result with semi-join and split-table derived table from queries with an IN subquery predicate in the WHERE clause and a derived table in the FROM clause to which split materialized optimization could be applied. (MDEV-23878)

  • With galera, correct transactions could not be committed with the following error when accessing system tables for read, and write to innodb tables in the same transaction: (MDEV-33828)

    Transactional commit not supported by involved engine
  • A wrong result on 2-nd execution of a prepared statement is possible when selecting from a view using a merged derived table (MDEV-31277)

  • Original IP not shown in network related error messages when proxy_protocol is in use (MDEV-33506)

  • Incorrect DEFAULT expression evaluated in UPDATE (MDEV-33790)

  • group by optimization incorrectly removing subquery where subject buried in a function (MDEV-28621)


For the complete list of changes in this release, see the changelog.


In alignment to the enterprise lifecycle, MariaDB Enterprise Server 10.6.18-14 is provided for:

  • AlmaLinux 8 (x86_64, ARM64)

  • AlmaLinux 9 (x86_64, ARM64)

  • CentOS 7 (x86_64)

  • Debian 10 (x86_64)

  • Debian 11 (x86_64, ARM64)

  • Debian 12 (x86_64, ARM64)

  • Microsoft Windows (x86_64) (MariaDB Enterprise Cluster excluded)

  • Red Hat Enterprise Linux 7 (x86_64)

  • Red Hat Enterprise Linux 8 (x86_64, ARM64)

  • Red Hat Enterprise Linux 9 (x86_64, ARM64, PPC64LE)

  • Rocky Linux 8 (x86_64, ARM64)

  • Rocky Linux 9 (x86_64, ARM64)

  • SUSE Linux Enterprise Server 12 (x86_64)

  • SUSE Linux Enterprise Server 15 (x86_64, ARM64)

  • Ubuntu 20.04 (x86_64, ARM64)

  • Ubuntu 22.04 (x86_64, ARM64)

Some components of MariaDB Enterprise Server might not support all platforms. For additional information, see "MariaDB Corporation Engineering Policies".