September 2021 - discuss - lists.mariadb.org

[Maria-discuss] explain for insert/update/delete
by MARK CALLAGHAN 08 Jul '25

08 Jul '25

Does MariaDB have any plans to support explain for insert/update/delete/replace/CTAS? There have been feature requests open for a very long time on official MySQL without any progress. I have had a few problems in production from 'bad' delete statements that had a very different plan than the select statement with the same where clause. The only way to check for a bad plan today is to use SHOW INNODB STATUS to determine whether the statement locks all rows in a table. http://bugs.mysql.com/bug.php?id=14745 http://bugs.mysql.com/bug.php?id=35355 -- Mark Callaghan mdcallag(a)gmail.com

3 3

[Maria-discuss] Galera 23.2.7 mariadb 5.5.33a msvc 1600 binaries available
by Yann Nayn 21 May '25

21 May '25

Binaries have been uploaded for both x86 and amd64 platforms. due to github file size limitations , the directories have been uploaded unarchived. for Win33 binaries , please checkout https://github.com/YannNayn/galera-mariadb-win32.git and for Win64(amd64) binaries (being uploaded/pushed): https://github.com/YannNayn/galera-mariadb-win64.git they are not recommended for a production environment. in the my.cnf file: _________ wsrep_provider=galera_smm.dll wsrep_sst_method=msqldump # percona xtrabackup will be tested soon _________ libevent and openssl(the provided binaries use respectively 2.1.3-alpha and 1.1.0-dev versions ) will be added next on github some limitations are stated on openssl website copied here for convenience: ____________ from http://www.openssl.org/ ____________ This software package uses strong cryptography, so even if it is created, maintained and distributed from liberal countries in Europe (where it is legal to do this), it falls under certain export/import and/or use restrictions in some other parts of the world. PLEASE REMEMBER THAT EXPORT/IMPORT AND/OR USE OF STRONG CRYPTOGRAPHY SOFTWARE, PROVIDING CRYPTOGRAPHY HOOKS OR EVEN JUST COMMUNICATING TECHNICAL DETAILS ABOUT CRYPTOGRAPHY SOFTWARE IS ILLEGAL IN SOME PARTS OF THE WORLD. SO, WHEN YOU IMPORT THIS PACKAGE TO YOUR COUNTRY, RE-DISTRIBUTE IT FROM THERE OR EVEN JUST EMAIL TECHNICAL SUGGESTIONS OR EVEN SOURCE PATCHES TO THE AUTHOR OR OTHER PEOPLE YOU ARE STRONGLY ADVISED TO PAY CLOSE ATTENTION TO ANY EXPORT/IMPORT AND/OR USE LAWS WHICH APPLY TO YOU. THE AUTHORS OF OPENSSL ARE NOT LIABLE FOR ANY VIOLATIONS YOU MAKE HERE. SO BE CAREFUL, IT IS YOUR RESPONSIBILITY. ________________________________________________ msvc 1600 redistributables SP1 need to be installed/available on the target machine: vcredist_x86.exe : http://www.microsoft.com/en-us/download/details.aspx?id=8328 vcredist_x64.exe : http://www.microsoft.com/en-us/download/details.aspx?id=13523 MSys binaries are provided and msqld.bat should then be used instead of mysqld.exe (e.g. mysld.bat --console --wsrep_cluster_address=gcomm:// ) in order to have a working sh shell(cygwin has been proved to do it as well) Please note that oqgraph is disabled (boost trunk is used , that is 1.55) Comments and suggestions are welcome.

5 4

[Maria-discuss] Loading a backup created from 10.6.4 into newly installed 10.6.4 causes mysql.proc to appear corrupt
by Jeff Dyke 30 Sep '21

30 Sep '21

Failing process: Install mariadb from ppa using apt (happens through salt, fwiw) Download last night's backup from a 10.6.4 server, which is a replica from a galera cluster. run the script attached restore_mariabackup.sh Once this is done the database itself works, for our application, but any client trying to access anything that requires mysql.proc gets an error similar to: *Sep 30 19:29:07 devmaria /etc/mysql/debian-start[24656]: error : CorruptSep 30 19:29:07 devmaria /etc/mysql/debian-start[24656]: sys.x$schema_table_statistics* *Sep 30 19:29:07 devmaria /etc/mysql/debian-start[24656]: Error : Cannot load from mysql.proc. The table is probably corrupted * I just built two new servers, one that builds mariadb and then overwrites the data from a backup and one that just installs mariadb. The two different files base_install.proc.sql and backupedup.proc.sql. The error output from sudo mysql_upgrade on the server that received the backup is in mysql_upgrade.out There are more differences in the proc table if i dump the data as well, but i think much of it is driven by the utf8_mb4 rather than 3. Tried to keep this sucient and use attachments. This process has worked for me for until i upgraded to 10.6.4. Please ask anything you need. I think i've been using this similar process to build dev machines since about 10.4 Thanks Jeff

1 2

[Maria-discuss] A general question about performance of update command
by Lehrbass, Robert 27 Sep '21

27 Sep '21

Hi there, I'm new to MariaDB and I'm running tests on the update command. Server version 10.5.11. I'm finding that updates to a table with engine=columnstore are far slower than to a table with default engine=innodb. Obviously, there is no primary key in a table with engine=columnstore, whereas the innodb table does have a primary key. In my tests, for engine=columnstore, 10000 rows took 1995 seconds to be updated, but for engine=innodb, 10000 rows took only 7 seconds to transfer. The difference suggests columnstore takes about 285X longer than innodb. Is this to be expected? I don't need a lengthy answer, btw, just general guidance. Thanks very much, Rob

1 0

[Maria-discuss] DBSeeder Version 3.0.3
by Walter Weinmann 13 Sep '21

13 Sep '21

We are pleased to release version 3.0.3 of DBSeeder ( https://github.com/KonnexionsGmbH/db_seeder) DBSeeder also supports the latest version of MariaDB Server available on Docker Hub (DBMS 10.6.4-focal) and Maven Repository (JDBC 2.7.4). [image: Perf_Snap_3.0.3_win10.png]

2 2