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https://dev.mysql.com/doc/refman/8.0/en/starting-server-troubleshooting.html
You can create a my.cnf file and specify startup options for the engines that you plan to use. If you are going to use storage engines that support transactional tables (InnoDB, NDB), be sure that you have them configured the way you want before ...
https://dev.mysql.com/doc/refman/8.0/en/starting-server.html
Such problems can occur if you neglected to create the grant tables by initializing the data directory before proceeding to this step, or if you ran the command that initializes the data directory without the --user option. If the server is unable ... This section describes how start the server on Unix and Unix-like ...
https://dev.mysql.com/doc/refman/8.0/en/windows-testing.html
In this case, start mysqld with the skip_name_resolve system variable enabled and use only localhost and IP addresses in the Host column of the MySQL grant tables. If you have set a password for the root account, deleted the anonymous account, or ...
https://dev.mysql.com/doc/refman/8.0/en/xml-functions.html
Table 14.16 XML Functions Name Description ExtractValue() Extract a value from an XML string using XPath notation UpdateXML() Return replaced XML fragment This section discusses XML and related functionality in MySQL. Do not output explicit error ...Note It is possible to obtain XML-formatted output from MySQL in the mysql and mysqldump clients by invoking them with the --xml ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-config-file.html
Configuring NDB Cluster requires working with two files: my.cnf: Specifies options for all NDB Cluster executables. This file, with which you should be familiar with from previous work with MySQL, must be accessible by each executable running in ...
https://dev.mysql.com/doc/refman/8.0/en/using-systemd.html
This script assists in creating the error log file only if the log location matches a pattern (/var/log/mysql*.log for RPM platforms, /var/log/mysql/*.log for Debian platforms). In other cases, the error log directory must be writable or the error ...If you install MySQL from a source distribution on a platform that uses systemd, obtain systemd support for MySQL by configuring the distribution using the -DWITH_SYSTEMD=1 CMake ...
https://dev.mysql.com/doc/refman/8.0/en/local-variable-scope.html
Because local variables are in scope only during stored program execution, references to them are not permitted in prepared statements created within a stored program. A local variable should not have the same name as a table column. Consequently, ... The scope of a local variable is the BEGIN ...
https://dev.mysql.com/doc/refman/8.0/en/replication-gtids-assign-anon.html
For a channel on a Group Replication group member, do not specify the Group Replication group name as the UUID for creating the GTIDs. The exception to this is any downstream replicas of the replica where you enabled ... From MySQL 8.0.23, you can ...
https://dev.mysql.com/doc/refman/8.0/en/scheduler-component.html
At startup, the scheduler component registers the performance_schema.component_scheduler_tasks table, which lists the currently scheduled tasks and some runtime data about each one. When a caller invokes the mysql_scheduler.create() service, it ...
https://dev.mysql.com/doc/refman/8.0/en/spatial-types.html
The specification describes a set of SQL geometry types, as well as functions on those types to create and analyze geometry values. MySQL spatial extensions enable the generation, storage, and analysis of geographic features: Data types for ... The ...