Logging MySQL queries in table

Just came around a handy (i.e. Docker environment) logging feature of MariaDB.

Enable logging:

SET global general_log = 1;
SET global log_output = 'table';

 

View query log:

SELECT * FROM mysql.general_log
-- OR --
SELECT * FROM mysql.general_log ORDER BY event_time DESC

 

Disable logging:

SET global general_log = 0;
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SQL to get WooCommerce product categories (terms)

For an import script I needed to get WooCommerce product categories so I ended up looking the generated query in /var/log/mysql/query.log for get_the_terms($postID, ‘taxonomy_name’)

I ended up using the following SQL query to get product categories:

SELECT t.*, tt.*
FROM wp_terms AS t 
INNER JOIN wp_term_taxonomy AS tt ON tt.term_id = t.term_id 
INNER JOIN wp_term_relationships AS tr ON tr.term_taxonomy_id = tt.term_taxonomy_id
WHERE tt.taxonomy IN ('product_cat') AND tr.object_id IN (11448)

Connect to localhost MySQL from Docker container

To test connection to MySQL/MariaDB server running on localhost from Docker container try:

docker run --rm -it --net=host mariadb mysql -u root -h 127.0.0.1
--rm  Automatically remove the container when it exits https://docs.docker.com/engine/reference/run/#clean-up-rm
-i    Keep STDIN open even if not attached https://docs.docker.com/engine/reference/run/#foreground
-t    Allocate a pseudo-TTY
--net Connect a container to a network https://docs.docker.com/engine/reference/run/#network-settings

New path for MySQL query log on OSX

Sometimes during development I need to see what SQL queries are executed and listing them in Console.app is maybe the most convenient solution on OSX.

console.app

To see queries in Console

mysqld query log OSX

I just created /etc/mysql/my.cnf with:

[mysqld]
general_log = 1
# general_log_file = /usr/local/mysql/data/mysqld.query.log
general_log_file = /var/log/mysql/mysqld.query.log

slow_query_log = 1
long_query_time = 1 # second
# slow_query_log_file = /usr/local/mysql/data/mysqld.slow.log
slow_query_log_file = /var/log/mysql/mysqld.slow.log
log_queries_not_using_indexes = 0

MySQL server needs own permissions on the parent log dir so:

sudo mkdir /var/log/mysql
sudo chown -R _mysql:_mysql /var/log/mysql

Last step is server restart.

sudo launchctl unload -F /Library/LaunchDaemons/com.oracle.oss.mysql.mysqld.plist
sudo launchctl load -F /Library/LaunchDaemons/com.oracle.oss.mysql.mysqld.plist

On a Linux machine I use multitail as an alternative.

Enabling MySQL 5.7 query logging on OSX

I got used to it that sometimes I need to check the queries run by MySQL. After clean OSX upgrade I forgot to enable it.

So I added the following to /etc/mysql/my.cnf:

[mysqld]

sql_mode=

general_log = 1
general_log_file = /usr/local/mysql/data/mysqld.query.log

slow_query_log = 1
long_query_time = 1 # second
slow_query_log_file = /usr/local/mysql/data/mysqld.slow.log
log_queries_not_using_indexes = 0

The default one that comes with the package is at /usr/local/mysql/support-files/my-default.cnf

There’s also an option to set logging via SQL queries.

Getting CREATE SQL for single Doctrine entity in Symfony2

I needed to create a new table for a single new Doctrine entity into an existing database.

I was in hurry and couldn’t find a solution so came up with my own.

Dump the whole SQL into a file:

php app/console doctrine:schema:create --dump-sql > dump.sql

For fixing lowercase table name I found a solution at http://kurtfunai.com/2012/09/doctrine-table-name.html

/**
 * NAMESPACE\ExampleBundle\Entity\User
 *
 * @ORM\Entity
 * @ORM\Table(name="user")
 */
class User
{

Getting ‘doesn’t have a default value’ from MySQL (MariaDB)?

Solution for me from ideas at https://stackoverflow.com/questions/15438840/mysql-error-1364-field-doesnt-have-a-default-values and https://www.farbeyondcode.com/Solution-for-MariaDB-Field–xxx–doesn-t-have-a-default-value-5-2720.html was to remove ‘STRICT_TRANS_TABLES’ from my.cnf.

So I ended up with the following in /usr/local/mysql/my.cnf:
[mysqlnd]
sql_mode=NO_ENGINE_SUBSTITUTION