Questions tagged [mariadb-10.1]

MariaDB 10.1 was released as stable (GA) with version 10.1.8 on 17 Oct 2015.

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SQL Error(1054): Unknown column in 'where clause' when trying to update. Column is actually available

I have two tables namely table_a and table_b. Table_a has several columns including student_id and course_start_date Table_b has several columns including student_id and fee_pay_date student_id is INT ...
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19 views

What does MariaDB use for an encryption initialisation vector?

I have been using MySQL 5.6 in development environment and MariaDB 5.6 in production until I needed to use encryption. MySQL 5.6 has multiple encryption modes and allows AES-256-CBC. MariaDB 5.6 only ...
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144 views

MariaDB 10.1 shutdown stuck at “Event Scheduler: Purging the queue”

I have read many different questions about slow MariaDB/MySQL shutdown, but I have not found an answer which solves my problem yet. On one of our servers with the highest load, when I issue a stop ...
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2answers
97 views

Unable to run mariadb in safe mode

When I run following command mysqld_safe --skip-grant-tables & I get message myuser@myvm:~$ 200523 08:24:41 mysqld_safe Logging to syslog. 200523 08:24:41 mysqld_safe Starting mysqld daemon ...
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1answer
56 views

Optimize SELECT statement for mysql database

I have this query: SELECT COUNT(*) AS "Other" FROM events JOIN triggers ON events.objectid = triggers.triggerid WHERE events.name REGEXP "No data from SAM0056(.FTG|.REC|.LEFT|.RIGHT|.BACK), .* ...
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154 views

Cannot login as new user on MariaDB

When I create a new user in MariaDB, I cannot login as that user. First I login to the database as root doing mariadb in a bash terminal. I then run the following commands to create a database and ...
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34 views

Cannot delete from MariaDB federated table

In our web application, there are some federated tables which point to a remote server, it is used so that when writing log entries to the federated table they get actually stored on this remote ...
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1answer
20 views

how can I update some table rows using data from existing rows?

I have created a table where it stores some multilingual store data with this structure create table store_locator_store_lang ( id_store int(11) unsigned not null, lang_id int not null, ...
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1answer
43 views

Mariadb started giving erroneous query results for 1 view

10.1.44-MariaDB-0ubuntu0.18.04.1 Have a view volv_action which does a few joins which has been working for years and was not changed. But last night Mariadb started giving erroneous results if its ...
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831 views

Mariadb is not starting

Please help me with this issue MariaDB not starting. Its a production server so not able to reinstall and clean the data at all. (This command executed by me) systemctl -l status mariadb.service ...
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1answer
224 views

my.cnf for 16 GB Ram Server [MariaDB]

I am very new to this stuff. I just wanted to ask if somebody has a good my.cnf for my MariaDB database because every time i have more than 1000 connections to my website it starts to have hight load ...
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1answer
461 views

Exclude rows with unique values in one column from grouped mysql query

The following table represents interactions form users with different projects: id user_id project_id 17373 6336 1001 17374 6336 1001 17375 6336 1001 ...
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1answer
57 views

SQL Variables inside SELECT query in a function

MariaDB 10.3.14 I have a function that generates the root id in a hierarchy: The function is this: CREATE FUNCTION `getRootId`(GivenID INT) RETURNS int(11) DETERMINISTIC BEGIN DECLARE ch INT; ...
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1answer
74 views

migrate users from mariadb10.1 to mysql5.7

My company is moving our databases from self-hosted mariadb 10.1 to Google CloudSQL (which is essentially MySQL 5.7). Dumping / restoring our application schemas looks straightforward. However I'm ...
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1answer
28 views

Set of values of a field of a related entity must be unique: How do I express this constraint in SQL?

Given the following three tables: Type( id int primary key, key varchar ) GroupOfInstances( id int primary key, name varchar ) InstanceOfType( id int primary key, ...
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284 views

Connect to MariaDB server fails although port seems to be open

Hello I am trying to connect to an external MariaDB server. The configurations files on this installations are in a different place but I managed to find my way around. The installation im using is: ...
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1answer
40 views

SELECT query returns legacy data

My program does r/w operations on a MariaDB table. There are circumstances why it has to do it in concurrent processes. That's why it does it with multiple connections. After a write (UPDATE query) ...
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171 views

Implication in Increasing MySQL maximum keys allowed per table

We have a situation where we encounter a MySQL error ERROR 1069: Too many keys specified. Max 64 keys allowed In our database (using Magento E-commerce) we need to add 76 indexed key columns but ...
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1answer
499 views

Cannot remove orphaned InnoDB Temp Table - missing .frm file

For the second time, I have encountered an issue, where our MySQL server (MariaDB v10.1) suddenly threw an error - Could not remove temporary table: './database_name/#sql-4593_791', error: 120. ...
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2answers
1k views

Max Connections Maria DB

Every time I reboot Mariadb places me the max_connections in 151 and in the my.cnf I have it with 300. Why does this happen?
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1answer
478 views

Multiple mariadb instances - how to access to the not default instances via command line?

I have a TYPO3 and a Moodle installation on one server with Debian stretch. Moodle needs some database configurations (MariaDB 10.1.38) which are different from the ones TYPO3 needs. I made a new ...
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2answers
174 views

how to improve this query performance

I have an application that's running this following query SELECT SQL_NO_CACHE p.*, product_shop.*, stock.out_of_stock, IFNULL(stock....
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1answer
166 views

convert date to timestamp and store into table using trigger mysql

Using trigger I convert DateTime into a timestamp and then store into another table. But somehow convert date into timestamp always affected by timezone so that's why I had use convert_tz of date and ...
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1answer
267 views

MariaDB Multiline RegEx

I'm running a SQL query in MariaDB under PHPMyAdmin as follows: select REGEXP_REPLACE(post_content,'(?m)<noindex>[.\r\n]*</noindex>','') from wp_posts where ID = 318 I'm trying to ...
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1answer
416 views

how to remove/deal with locks in a MariaDB Galera cluster

I have a cluster of 3 nodes running MariaDB Galera cluster, cluster works as expected, I can reboot a single node at a time and in the best case, IST will be used or SST(using rsync) to sync back the ...
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1answer
139 views

MySQL Conditional Counter Based Other Columns?

I have a query that returns purchases for all customers in a store across a date range. It works fine, but now I've been asked to modify the results so only the first purchase per customer per day is ...
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1answer
140 views

How to optimize the execution of query that takes too long

I am working with a query that is taking around 53 minutes to execute, which I feel is excessive. Maria DB version: Server version: 10.1.38-MariaDB-1~stretch mariadb.org The declaration of the ...
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2answers
171 views

User rank based on cumulative rows

UPDATE: Full table schema and data: https://www.db-fiddle.com/f/jT3Mfwd1BJ8GrsBxxPDC8M/1 Table structure (some fields are hidden): +---------+---------+------------+-------------+-------+-------+ | ...
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1answer
107 views

Cannot import table due to zombie constraint

I tried to refresh my copy of the production database by emptying and importing a SQL file. I've done it hundreds of times, only this time the import failed. I tried dropping & recreating the ...
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2answers
1k views

Unexpected RAM usage on MySQL

We have a server which hosts about 10 customers in a multi-tenant web application, each customer has its own database which is cloned from a template, and each database is a little less than 3000 ...
2
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1answer
448 views

Using mariabackup/xtrabackup vs block level snapshots

I am running a mariadb 10.1 instance with all innodb tables and a replication slave in a k8s cluster on Google Cloud's GKE. I have a scheduled mysqldump that runs every night. But for additional ...
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1answer
754 views

How to restore dump from MariaDB 10.1 to MySQL 5.5

I generate backups of my databases by using mysqldump.exe -u root --all-databases > mariaDbBackup.sql. When I try to restore my dump by doing mysql -u root -p < mariaDbBackup.sql, I get an ...
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23 views

How do I select this pivot query by specified Month

I need help with my mysql pivot code. Everytime I add WHERE MONTH(attendance_date) = 2 inside @sql_dynamic gets error. pls help I have a code: SET @sql_dynamic:= (SELECT GROUP_CONCAT(DISTINCT ...
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2answers
1k views

sql select only the last record for multiple values

I have a table called "sessions" with say 4 columns like below id name s_time f_time 01 abc 10.15 10.45 02 abc 11.05 11.55 03 abc 12.18 13.46 04 abc 15.12 16.53 05 def 10.01 12.58 06 ...
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2answers
74 views

Time taken to drop/add index is lesser than adding a column. Why is that?

I'm using 10.1.25-MariaDB-1~xenial, but engine is innodb though. I'm performing an alter by default it does ONLINE alter. When I add column it takes at least 50 mins for 50G table in our ...
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1answer
91 views

Mariadb 10.1 / Galera - bootstrap node always doesn't lose quorum

I'm using mariadb10.1.37, wsrep_provider_version 25.3.24(r3825). On my dev cluster (2node+1arbitrator) I found the following behaviour: node1: bootstrap new cluster (using galera_new_cluster, with pc....
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3answers
143 views

How can I speed up this query?

Here is the definition of the relevant table: CREATE TABLE IF NOT EXISTS pricehistory ( id INTEGER(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY, price INTEGER NOT NULL, region ...
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1answer
48 views

Processes dissappear from processlist (MariaDB)

In my application I need to monitor list of process ids for some database user, so I execute SHOW PROCESSLIST command to get information. The problem is that sometimes some Id dissapears from command ...
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2answers
1k views

DELETE inside INSERT Trigger

I wanted to make rotation inside my logs table to store last 100 rows only, and decided to use triggers, as in create trigger rotate_log after insert on logs for each row begin declare cnt int; ...
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2answers
376 views

Create users identified by the same password as another user in MariaDB 10.0.X

How do I create users with the same password as another user in MariaDB 10.x? I do not know the password of the existing user , so i want to use same hashed password as existing, also do need to ...
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3answers
7k views

Which file do I need to modify my.cnf MariaDB on Ubuntu 18.04

I want to modify these values: [mysqld] key_buffer_size = 256M max_allowed_packet = 128M thread_stack = 256K query_cache_limit = 64M query_cache_size = 384M innodb_buffer_pool_size = ...
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0answers
67 views

MariaDB Cluster Cannot Join new Node

This is status on Main node. it's show some seqno as 17210843 when new empty node is join. i'm found rsync process is ok. but i see difference seqno in linux process after finish this process my ...
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1answer
109 views

How does STRICT_ALL_TABLES work with multi-row statements and partial updates?

In the docs for STRICT_ALL_TABLES it states, For STRICT_ALL_TABLES, MySQL returns an error and ignores the rest of the rows. However, because the earlier rows have been inserted or updated, the ...
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1answer
324 views

greatest n per group with a 3 tables join

Working on a project with following objects: People id Vehicles id model: text and a link table for owners which passes through owners changes Owner_Changes old_person_id new_person_id ...
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0answers
751 views

WITH clause in Maria DB

I am trying to run below query in Maria DB (10.1.26-MariaDB-0+deb9u1 Debian 9.1) with ind as ( select index_name, table_name, group_concat(column_name) column_name, ...
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1answer
57 views

How can I use user defined variables and `USE`?

I have some schemas, all with the same format. The format is: schema name, underscore, single digit (example: database_1). How can I loop through all of these schemas easily? I tried SET @num = 1; USE ...
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1answer
50 views

JOIN on “Latest Match” in “Order”

Having a hard time explaining my scenario and what I am trying to accomplish. I have two tables like so, I have reduced the values for my scenarios Table1 +----------------------+ | ID | Time ...
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1answer
1k views

how to get 'Queries per second avg' using SQL (not 'mysqladmin status')

When I start mysqladmin, it prints out several statistics, including "Queries per second avg": # mysqladmin --defaults-file=../mylogin.cnf status Uptime: 4568115 Threads: 859 Questions: 3703806462 ...
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0answers
2k views

Mariadb connection fails through tunnel when bind address = localhost

I have a MariaDB 10.1.26 virtual server running on Debian 9. It is connected to via ssh tunnel and the bind address = localhost. It has been working without fail untill recently. Now when I connect ...
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2answers
135 views

WARN max_connections from pt-variable-advisor - what to configure for DBaaS?

Our VM configuration (hosted on Vmware) # cat /proc/cpuinfo |grep "cpu cores" | awk -F: '{ num+=$2 } END{ print "cpu cores", num }' cpu cores 32 # free -h total used free ...