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https://dev.mysql.com/doc/refman/8.0/en/create-procedure.html
By default, MySQL automatically grants the ALTER ROUTINE and EXECUTE privileges to the routine creator. The following example shows a simple stored procedure that, given a country code, counts the number of cities for that country that appear in the ...By default, a stored routine is associated with the default ...
https://dev.mysql.com/doc/refman/8.0/en/socket-pluggable-authentication.html
Alternatively, to load the plugin at runtime, use this statement: INSTALL PLUGIN auth_socket SONAME 'auth_socket.so'; INSTALL PLUGIN loads the plugin immediately, and also registers it in the mysql.plugins system table to cause the server to load it ...To verify plugin installation, examine the Information Schema PLUGINS table or use the SHOW PLUGINS statement (see Section 7.6.2, “Obtaining Server Plugin ...
https://dev.mysql.com/doc/refman/8.0/en/clone-plugin-replication.html
In MySQL 8.0.17 and 8.0.18, only the table mysql.slave_master_info (the connection metadata repository) is copied. From MySQL 8.0.19, the tables mysql.slave_relay_log_info (the applier metadata repository) and mysql.slave_worker_info (the applier ...
https://dev.mysql.com/doc/refman/8.0/en/database-use.html
You can do so by creating tables to hold your data and loading them with the desired information. Then you can answer different sorts of questions about your animals by retrieving data from the tables. Once you know how to enter SQL statements, you ...
https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html
mysql> SELECT CONVERT_TZ('2004-01-01 12:00:00','GMT','MET'); -> '2004-01-01 13:00:00' mysql> SELECT CONVERT_TZ('2004-01-01 12:00:00','+00:00','+10:00'); -> '2004-01-01 22:00:00' Note To use named time zones such as 'MET' or 'Europe/Amsterdam', the ... This section describes the functions that can be used to manipulate temporal ...
https://dev.mysql.com/doc/refman/8.0/en/descending-indexes.html
For InnoDB full-text search, this means that the index required on the FTS_DOC_ID column of the indexed table cannot be defined as a descending index. MySQL supports descending indexes: DESC in an index definition is no longer ignored but causes ...
https://dev.mysql.com/doc/refman/8.0/en/environment-variables.html
This section lists environment variables that are used directly or indirectly by MySQL. Most of these can also be found in other places in this manual. Options on the command line take precedence over values specified in option files and ...
https://dev.mysql.com/doc/refman/8.0/en/error-log-components.html
A sink may also write to the Performance Schema error_log table; see Section 29.12.21.2, “The error_log Table”. For a sink component, whether it supports an interface to the Performance Schema error_log table. This section describes the ...
https://dev.mysql.com/doc/refman/8.0/en/faqs-information-schema.html
Can I add to or otherwise modify the tables found in the INFORMATION_SCHEMA database? A.7.1. Where can I find documentation for the MySQL INFORMATION_SCHEMA database? See Chapter 28, INFORMATION_SCHEMA Tables. What is the difference between the ...
https://dev.mysql.com/doc/refman/8.0/en/foreign-key-optimization.html
If a table has many columns, and you query many different combinations of columns, it might be efficient to split the less-frequently used data into separate tables with a few columns each, and relate them back to the main table by duplicating the ...Depending on how the data is distributed, the queries might perform less I/O and take up less cache memory because the relevant columns are packed together on ...