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https://dev.mysql.com/doc/refman/8.0/en/statement-labels.html
[begin_label:] BEGIN [statement_list] END [end_label] [begin_label:] LOOP statement_list END LOOP [end_label] [begin_label:] REPEAT statement_list UNTIL search_condition END REPEAT [end_label] [begin_label:] WHILE search_condition DO statement_list ...
https://dev.mysql.com/doc/refman/8.0/en/symbolic-links-to-databases.html
On Unix, symlink a database using this procedure: Create the database using CREATE DATABASE: mysql> CREATE DATABASE mydb1; Using CREATE DATABASE creates the database in the MySQL data directory and permits the server to update the data dictionary ...Stop the server to ensure that no activity occurs in the new database while it is being ...
https://dev.mysql.com/doc/refman/8.0/en/sys-schema-object-overview.html
object_type The object type: BASE TABLE, INDEX (index_type), EVENT, FUNCTION, PROCEDURE, TRIGGER, VIEW. This view summarizes the types of objects within each schema. Note For MySQL instances with a large number of objects, this view might take a ...
https://dev.mysql.com/doc/refman/8.0/en/table-cache.html
When the table cache fills up, the server uses the following procedure to locate a cache entry to use: Tables not currently in use are released, beginning with the table least recently used. When you execute a mysqladmin status command, you should ...
https://dev.mysql.com/doc/refman/8.0/en/upgrade-best-practices.html
MySQL supports upgrading between minor versions (within an LTS series) and to the next major version (across an LTS series). LTS releases have 8+ years of support and are meant for production use. Performing a minor version upgrade is ...
https://dev.mysql.com/doc/refman/8.0/en/using-stack-trace.html
On some operating systems, the error log contains a stack trace if mysqld dies unexpectedly. You can use this to find out where (and maybe why) mysqld died. To get a stack trace, you must not compile mysqld with the -fomit-frame-pointer option to ...
https://dev.mysql.com/doc/refman/8.0/en/using-systemd.html
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 option. The following discussion covers these topics: Overview of ...
https://dev.mysql.com/doc/refman/8.0/en/while.html
Example: CREATE PROCEDURE dowhile() BEGIN DECLARE v1 INT DEFAULT 5; WHILE v1 > 0 DO ... [begin_label:] WHILE search_condition DO statement_list END WHILE [end_label] The statement list within a WHILE statement is repeated as long as the ...
https://dev.mysql.com/doc/refman/8.0/en/x-plugin-system-monitoring.html
This is important, because if you instead try to switch to SQL mode, the procedure shows the result of this operation rather than the X DevAPI operation. For general X Plugin monitoring, use the status variables that it exposes. For information ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-row-format.html
The row format of a table determines how its rows are physically stored, which in turn can affect the performance of queries and DML operations. Variable-length columns are an exception to the rule that column values are stored in B-tree index ...