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Questions tagged [mariadb-10.2]

MariaDB 10.2 was released as stable (GA) with version 10.2.6 on 23 May 2017. Please also tag with mariadb for search purposes.

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2 votes
1 answer
439 views

Finding temporary table name in MariaDB

As I reported some days ago to MariaDB bug tracker the following bug: https://jira.mariadb.org/browse/MDEV-17420, slave replicas with version 10.2.x are leaking temporary tables on MyISAM files. Our ...
1 vote
1 answer
301 views

Connection aborts is happening in MariaDB 10.2 but not in 10.1 even with log_warnings level set to 2

I am noticing different behavior in mariadb 10.1 & 10.2 reg.connection aborts. I noticed connection getting aborted after 7 minutes(wait_timeout) of any query execution. There are few random ...
0 votes
1 answer
365 views

perform non locking select when updating another table

We need to perform the following (periodic) query in mariadb: update A set status='INACTIVE' where status='ACTIVE' and a.b_id in (select id from B where ... LOCK IN SHARE MODE); Unfortunately it ...
1 vote
1 answer
318 views

Setup replication between two Galera nodes

I've been using MariaDB 10.2 Galera with 3 nodes successfully on local servers. Now, I have a second 3-nodes Galera cluster on another location, joined by an Site-to-Site IPSec Tunnel. I can't really ...
1 vote
1 answer
848 views

Mysql service stops with [ERROR] InnoDB: CORRUPT LOG RECORD FOUND

In my Plesk Obsidian version 18.0.42 running on CentOS Linux release 7.9.2009 with MySQL version 10.2.43-MariaDB. All of a sudden database stopped working. Mysql service never comes up on start ...
0 votes
1 answer
323 views

MariaDB 10.2.22 Galera Cluster Using Bad Indexes After Analyze

I'm using Drupal on a MariaDB Galera 10.2.22 3 node cluster and I'm having some problems with one query. I have a table (InnoDB) called field_data_field_department which has a bunch of indexes. If I ...
0 votes
1 answer
38 views

Can't export MariaDB large table by mysqldump when row_format is compressed

I have a MariaDB 10.2.13 server. This server contains a database called 'factory'. This database contains a table called 'client'. This is a large table. client table structure: CREATE TABLE `client` (...
0 votes
1 answer
3k views

Mysql_upgrade fails, table is corrupted

I have a mariaDB with a table that is corrupted. It's useless data to me, so I've tried to drop the schema but it won't drop. Instead, it gives me this error when trying to drop it: "Error Code: 1805....
0 votes
1 answer
143 views

Unable to DROP or MODIFY a column because row size is too large

I've tried to ALTER the table to DROP the unused columns or to change the data type of some VARCHAR columns to TEXT, but I always get this error: ERROR 1118 (42000) at line 1: Row size too large (>...
0 votes
1 answer
436 views

Unable to translate Unicode character \\uDCC9 at index 5 to specified code page

I'm using MariaDB (and Adminer) MySQL version: 5.5.5-10.10.2-MariaDB-1:10.10.2+maria~ubu2204 through PHP extension MySQLi And this is the show create table Pages: CREATE TABLE `Pages` ( `Id` ...
1 vote
0 answers
270 views

How can I prevent overload of Mariadb server?

I'm running MariaDB 10.2.27 on Ubuntu 16.04 (10 cores, 40 GB RAM). We have a queued message handling system (using Symfony Messenger) that normally has 20 workers consuming messages from the queue. ...
5 votes
2 answers
3k views

Why am I connecting securely to MySQL when I don't have client certificates?

I don't understand the MySQL documentation for encrypted connections. The server is configured with certificates, and unless I am misreading it, the documentation says that the client must have ...
0 votes
1 answer
2k views

Mysql service down with [ERROR] InnoDB: Page log sequence number is in the future

I have a Centos 7.9 server with MariaDB version 10.2.43. All of a sudden on May 2 2022, I have started receiving mysql down alerts. On checking I could see below log information in logs. Error 2:- ...
0 votes
4 answers
3k views

Practical way of finding last update/insert/delete of any table in a database?

OS: W10. This question is specifically about what's possible in MariaDB, specially version "Ver 10.16 Distrib 10.2.11-MariaDB". Edit In light of the answer by Rick James I have now upgraded ...
1 vote
0 answers
236 views

mariaDB 10.2: sql mode has changed

The Upgrading from MariaDB 10.1 to MariaDB 10.2 states: SQL_MODE has been changed; in particular, NOT NULL fields with no default will no longer fall back to a dummy value for inserts which do not ...
-1 votes
1 answer
679 views

Mariadb encryption

I have a requirement to encrypt certain column of DB tables. Going through the links, have followed the below steps: In /etc/my.cnf [mysqld] plugin-load-add = file_key_management ...
1 vote
1 answer
187 views

Inconsistent results between MySQL and MariaDB when using variables and order

I'm building an accounting table and I need to show the current balance on each transaction. Everything is working fine in my local environment (Windows 10 + MySQL 5.7.19), but the same query gives me ...
1 vote
2 answers
1k views

Missing an inserted row

I am having a strange heisenbug when a set of queries in a transaction (in MariaDB 10.2.38) somehow results in missing rows afterward. I mean that there are rows inserted within the transaction, but ...
13 votes
4 answers
4k views

In the same query INSERT, can two VALUES being NOW() return a different time?

I met a query similar to INSERT INTO mytable (id, Created, Updated) VALUES (null, NOW(), NOW()) having column definitions | Created | datetime | | Updated | datetime | Will in this case MySQL ...
0 votes
1 answer
282 views

Can large data deletion affect Innodb buffer pool performance? [duplicate]

At the beginning of this year we lunched a lot of massive data deletions (millions of rows per week) in our production database. Also, there is an automatic integration of new data (insert/updates) of ...
2 votes
1 answer
1k views

GSSAPI on MariaDB

I'm using Maria 10.2.13 on Windows Server 2012 and I want to use GSSAPI authentication with it so that we can continue using windows auth. I have followed this tutorial: https://mariadb.com/kb/en/...
0 votes
2 answers
603 views

How to find unused columns in MariaDB tables

I have a lot of tables in my DB that have a number of columns which might not be getting used as they slowly lost their relevance with time, I need to find such columns and delete those from the ...
1 vote
0 answers
53 views

JOIN bug in MariaDB 10.2 [closed]

This is less a question than just a "beware." Thankfully MariaDB 10.2 is an old version, but it does some funky things when joining to nested derived tables. I updated my database from ...
0 votes
1 answer
2k views

How to use FIRST_VALUE window function in MySQL/MariaDB to get one row per group?

I'm pleased to see window functions landed in MariaDB 10.2. I thought they would be good for first-of-group problems, but I'm struggling to see how they're efficient. I have something like this: ...
1 vote
0 answers
607 views

Why is PDO::ATTR_EMULATE_PREPARES = false causing "MySQL server has gone away" errors?

I've been using PHP PDO with the default setting of ATTR_EMULATE_PREPARES = true and it was working fine. However, I wanted to be able to select database values as integers instead of having them ...
1 vote
1 answer
156 views

SLAVE off when loading data into the MASTER from another database

I have an active MASTER/SLAVE replication (Mariadb 10.2) with a single database (see scenario 1) I decided to add in IMPORT database to populate the MASTER database as described in scenario 2. ...
4 votes
1 answer
10k views

How to clear the InnoDB redo log before starting mysqld for crash recovery

System: Windows Server 2012 R2, MariaDB 10.2.8 We are currently trying to recover from a quasi-crash (it was a normal shutdown, but mysqld won't start up again) and are having problems with the redo ...
3 votes
2 answers
1k views

Dropping a CHECK in mariadb?

I have a schema migration plan to add json column to mariadb 10.2. But I am required to have a reverse plan. Here's the forward plan: ALTER TABLE `mydb`.`table1` ADD COLUMN jsonf JSON DEFAULT NULL; ...
0 votes
1 answer
501 views

Bypass truncated data type error in `CREATE TABLE AS`

I am attempting to recreate the code from this excellent tutorial in MariaDB 10.2 to try and build nested sets from an existing adjacency list. (The goal being to ingest changes to the adjacency list ...
0 votes
1 answer
25 views

Why is it not possible to "SELECT" Data as parameters for certain clauses like LIMIT?

EXAMPLE: CREATE TABLE t (A INT); INSERT INTO t VALUES(1),(2),(3),(4),(5); This works: SELECT A FROM t WHERE A=(SELECT 1) This does not: SELECT A FROM t LIMIT (SELECT 1); This works: SELECT A ...
0 votes
1 answer
153 views

MySQL Fast Database Data Validation Master/Slave

I'm moving a MySQL database from the US to Australia and have a requirement where downtime is kept to an absolute minimum. The database is 400GB is size, replication is working without any issues. ...
1 vote
1 answer
984 views

Does a MySQL dump that contains triggers double data on import?

I have a quick and simple question to clarify. I have medium sized database (400 Gigs) running in MariaDB 10.2 with lots of tables and lots of triggers as well. I am planning to take a mysqldump and ...
2 votes
2 answers
712 views

Configure MariaDB client with host-specific credentials?

How can I configure my MariaDB client (mysql) so that I don't have to enter a password to connect, regardless of which host I am connecting to? I can't just put a password in the [client] section of ~...
0 votes
0 answers
203 views

Fulltext search in a CTE result - missing fulltext index

My question applies to MariaDB 10.2.7 The query WITH prefiltered AS ( SELECT id, fulltext_indexed_column FROM fulltext_table WHERE id < 30 ) SELECT * FROM prefiltered WHERE MATCH(...
0 votes
1 answer
334 views

Can XtraDB be enabled on MariaDB 10.2

Can we create a table in MariaDB 10.2 with XtraDB engine? I have installed MariaDB 10.2 and I am trying to create a table with storage engine XtraDB and I am getting error *mysql> CREATE TABLE T1(ID ...
0 votes
0 answers
31 views

MariaDB Replication - Missing ^M Characters on Slave

I've got a simple single master->slave replication setup with MIXED binlog format for mariadb 10.2.22-1 on RHEL7. I believe I'm having an issue where '^M' characters in a longtext column are not ...
2 votes
2 answers
4k views

Mysql: set variable in mysqldump

I recently added a global variable in mmy.cnf max_statement_time=120 ; to stop long running queries and to throw an exception. Its working fine. Then I am unable to run mysqldump for backing up all my ...
4 votes
3 answers
15k views

The table is full - MariaDB

I am getting the following error whist trying to execute a long running query. The table 'C:\Windows\SERVIC~2\NETWOR~1\AppData\Local\Temp#sql1664_349_19be' is full The C drive (NTFS) on the server ...
1 vote
1 answer
325 views

MariaDB optimisation [closed]

I stuck a bit with setting the best performance of MariaDB on my VPS. I have: 6 cores; 16GB RAM; 300GB SSD; CloudLinux; LiteSpeed >> MySQLTuner 1.7.0 - Major Hayden <[email protected]> &...
0 votes
0 answers
424 views

MariaDB 10.2 crash on innodb table corruption - trying to restore the database

I'm running MariaDB 10.2 on Windows and had some hard drive corruption on my server that messed up some innodb tables. Unfortunately this also affected backups, so I'm trying to dump the tables and ...
1 vote
1 answer
749 views

Prepared statement too slow

have an issue with MariaDB 10.2.12 running in aws rds (single master, no slave) when I run prepared statement using a variable substitution PREPARE stmt1 FROM "select ...quite complex select from ...
1 vote
1 answer
120 views

Join against two tables to get single combined result set

tl;dr I made a SQLFiddle here http://sqlfiddle.com/#!9/031e71/1 with a minimal, complete, reproducible test case (though very specific to the problem domain of orders and products). I have a Zen Cart ...
-1 votes
1 answer
43 views

MySQL - Classic Date Functions

Version: 10.2.18-MariaDB I'm attempting to find the first available room within December (already included in the sample table) that will be free for 3 consecutive days. The expected output should ...
1 vote
1 answer
4k views

mysql : ordering a table in the order of the primary key

I have a table with a primary key consisting of two integer columns. I store ~200 millions lines in this table. My program needs to get the full table ordered by the columns of the primary key in the ...
1 vote
0 answers
1k views

MariaDB 10.3 slave fails to replicate from a MariaDB 10.2 master

We have a 10.2.18 master and 4 slaves with 10.2.18. Because of this bug that I've reported last week (https://jira.mariadb.org/browse/MDEV-17420) we tried to upgrade one of the replicas to 10.3.10 to ...
1 vote
0 answers
57 views

MySQL InnoDB stop locking when large sql is executed

We face a issue that the InnoDB table is locked, when a sql file that is executed is large than a certain file size. The problem does not appear when the file size is much lower, for example 25MB. ...
0 votes
1 answer
2k views

Add a New Column with ALIASES on 'date' by automation based on search results

I am trying to create a new column based on date search result. I have written a code in the link SQL fiddle as I am looking for date automation on each column based on the date format. the date ...
6 votes
1 answer
2k views

Allow only unique combination of values for a composite primary key

I created the following table called books: CREATE TABLE IF NOT EXISTS `books` ( `id` BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, `name` TEXT NOT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=...
0 votes
2 answers
216 views

Which way should be selected when move from mysql to mariadb? [closed]

Now, the mysql version is 5.1.I plan to move to mariadb 10.2.Use mysqldump and source to update databases. Based on MySQL Upgrade Strategies, Upgrading to the latest release is recommended before ...
1 vote
1 answer
3k views

table_open_cache increase issue - MariaDB 10.2

I'm trying to increase to 9000 but MariaDB sets it at 4895 automatically. Here is my simple config https://pastebin.com/raw/4eFiuFSv MySQLTuner output: Control warning line(s) into /var/lib/mysql/...