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https://dev.mysql.com/doc/refman/8.0/en/innodb-persistent-stats.html
You can also configure automatic statistics recalculation for individual tables by specifying the STATS_AUTO_RECALC clause when creating or altering a table. To override these system-wide settings and configure optimizer statistics parameters for ...
https://dev.mysql.com/doc/refman/8.0/en/merge-storage-engine.html
An alternative to a MERGE table is a partitioned table, which stores partitions of a single table in separate files and enables some operations to be performed more efficiently. Use ALTER TABLE tbl_name UNION=(...) to change the list of underlying ... The MERGE storage engine, also known as the MRG_MyISAM engine, is a collection of identical MyISAM tables that can be used as ...
https://dev.mysql.com/doc/refman/8.0/en/repair-table.html
REPAIR PARTITION to repair one or more partitions; for more information, see Section 15.1.9, “ALTER TABLE Statement”, and Section 26.3.4, “Maintenance of Partitions”. [QUICK] [EXTENDED] [USE_FRM] REPAIR TABLE repairs a possibly corrupted ...
https://dev.mysql.com/doc/refman/8.0/en/atomic-ddl.html
Supported table DDL statements include CREATE, ALTER, and DROP statements for databases, tablespaces, tables, and indexes, and the TRUNCATE TABLE statement. Supported non-table DDL statements include: CREATE and DROP statements, and, if applicable, ...In earlier MySQL versions, metadata was stored in metadata files, nontransactional tables, and storage engine-specific dictionaries, which necessitated intermediate ...An ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-data-encryption.html
ALTER SCHEMA and ALTER TABLESPACE operations do not apply the default_table_encryption setting. An ENCRYPTION clause must be specified explicitly to alter the encryption of an existing schema or general tablespace. When ... InnoDB supports ...InnoDB ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-information-schema-system-tables.html
INSTANT_COLS shows number of columns in the table prior to adding the first instant column using ALTER TABLE ... The HAS_DEFAULT and DEFAULT_VALUE columns only apply to columns added instantly using ALTER TABLE ... You can extract metadata about ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-table-wait-summary-tables.html
The following sections describe the table I/O and lock wait summary tables: table_io_waits_summary_by_index_usage: Table I/O waits per index table_io_waits_summary_by_table: Table I/O waits per table table_lock_waits_summary_by_table: Table lock ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-file-per-table-tablespaces.html
A table-copying ALTER TABLE operation on a table that resides in a shared tablespace can increase the amount of disk space occupied by the tablespace. A file-per-table tablespace contains data and indexes for a single InnoDB table, and is stored on ...Changing the setting at runtime requires privileges sufficient to set global system ...
https://dev.mysql.com/doc/refman/8.0/en/rename-table.html
You must have ALTER and DROP privileges for the original table, and CREATE and INSERT privileges for the new table. RENAME TABLE tbl_name TO new_tbl_name [, tbl_name2 TO new_tbl_name2] ... As of MySQL 8.0.13, you can rename tables locked with a ...
https://dev.mysql.com/doc/refman/8.0/en/replication-features-differing-tables.html
Source and target tables for replication do not have to be identical. A table on the source can have more or fewer columns than the replica's copy of the table. In addition, corresponding table columns on the source and the replica can use ...