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https://dev.mysql.com/doc/refman/8.0/en/stored-program-restrictions.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. An event may not be created from within a stored program. An event also may not ...Some of the restrictions noted here apply to all stored routines; that is, both to stored procedures and stored ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-background.html
The most common way to create a fault-tolerant system is to resort to making components redundant, in other words the component can be removed and the system should continue to operate as expected. This creates a set of challenges that raise ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-statistics-table.html
SEQ_IN_INDEX The column sequence number in the index, starting with 1. However, prefix lengths for index specifications in CREATE TABLE, ALTER TABLE, and CREATE INDEX statements are interpreted as number of characters for nonbinary string types ...
https://dev.mysql.com/doc/refman/8.0/en/lock-instance-for-backup.html
LOCK INSTANCE FOR BACKUP prevents files from being created, renamed, or removed. LOCK INSTANCE FOR BACKUP permits DDL operations that only affect user-created temporary tables. In effect, files that belong to user-created temporary tables can be ...
https://dev.mysql.com/doc/refman/8.0/en/myisampack.html
(myisampack creates an intermediate file named tbl_name.TMD in the database directory while it compresses the table. --tmpdir=dir_name, -T dir_name Command-Line Format --tmpdir=dir_name Type Directory name Use the named directory as the location ...
https://dev.mysql.com/doc/refman/8.0/en/optimize-table.html
Use OPTIMIZE TABLE in these cases, depending on the type of table: After doing substantial insert, update, or delete operations on an InnoDB table that has its own .ibd file because it was created with the innodb_file_per_table option enabled. To ...
https://dev.mysql.com/doc/refman/8.0/en/optimizing-innodb-diskio.html
For example, creating a new MySQL instance and its associated data files could cause large surges of disk write activity, impeding the performance of other MySQL instances that use the same storage devices. For more information, refer to the ... If ...
https://dev.mysql.com/doc/refman/8.0/en/show-index.html
Seq_in_index The column sequence number in the index, starting with 1. However, prefix lengths for index specifications in CREATE TABLE, ALTER TABLE, and CREATE INDEX statements are interpreted as number of characters for nonbinary string types ...
https://dev.mysql.com/doc/refman/8.0/en/upgrade-binary-package.html
If not, the server creates them in the data directory, populates them with metadata, and then proceeds with its normal startup sequence. Important If you have tables that contain generated columns, use the mysqldump utility provided with MySQL 5.7.9 ... This section describes how to upgrade MySQL binary and package-based installations on ...
https://dev.mysql.com/doc/refman/8.0/en/ansi-diff-foreign-keys.html
(Although you can write an ON DELETE or ON UPDATE clause as part of the REFERENCES clause, it is also ignored.) This syntax creates a column; it does not create any sort of index or key. row *************************** Table: shirt Create Table: ...