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https://dev.mysql.com/doc/refman/5.7/en/innodb-memcached-txn.html
Allowing or Disallowing DDL By default, you can perform DDL operations such as ALTER TABLE on tables used by the daemon_memcached plugin. Although the default behavior does not offer the best possible raw performance, it is still fast compared to ...
https://dev.mysql.com/doc/refman/5.7/en/processlist-access.html
Note As of MySQL 5.7.39, an alternative implementation for SHOW PROCESSLIST is available based on the Performance Schema processlist table, which, like the threads table, does not require a mutex and has better performance characteristics. The ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-online-ddl-single-multi.html
Before the introduction of online DDL, it was common practice to combine many DDL operations into a single ALTER TABLE statement. Because each ALTER TABLE statement involved copying and rebuilding the table, it was more efficient to make several ...
https://dev.mysql.com/doc/refman/5.7/en/ansi-diff-select-into-table.html
For example: INSERT INTO tbl_temp2 (fld_id) SELECT tbl_temp1.fld_order_id FROM tbl_temp1 WHERE tbl_temp1.fld_order_id > 100; Alternatively, you can use SELECT ... The same syntax can also be used inside stored routines using cursors and local ...
https://dev.mysql.com/doc/refman/5.7/en/firewall-information-schema-tables.html
The following sections describe the INFORMATION_SCHEMA tables associated with MySQL Enterprise Firewall (see Section 6.4.6, “MySQL Enterprise Firewall”). These tables are available only if the appropriate firewall plugins are enabled.
https://dev.mysql.com/doc/refman/5.7/en/general-information-schema-tables.html
The following sections describe what may be denoted as the “general” set of INFORMATION_SCHEMA tables. These are the tables not associated with particular storage engines, components, or plugins.
https://dev.mysql.com/doc/refman/5.7/en/information-schema-character-sets-table.html
The CHARACTER_SETS table has these columns: CHARACTER_SET_NAME The character set name. MAXLEN The maximum number of bytes required to store one character. Notes Character set information is also available from the SHOW CHARACTER SET statement. The ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-collation-character-set-applicability-table.html
The COLLATION_CHARACTER_SET_APPLICABILITY table indicates what character set is applicable for what collation. CHARACTER_SET_NAME The name of the character set with which the collation is associated. Notes The COLLATION_CHARACTER_SET_APPLICABILITY ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-collations-table.html
The COLLATIONS table provides information about collations for each character set. CHARACTER_SET_NAME The name of the character set with which the collation is associated. IS_DEFAULT Whether the collation is the default for its character set.
https://dev.mysql.com/doc/refman/5.7/en/information-schema-optimizer-trace-table.html
The OPTIMIZER_TRACE table provides information produced by the optimizer tracing capability for traced statements. The OPTIMIZER_TRACE table has these columns: QUERY The text of the traced statement. MISSING_BYTES_BEYOND_MAX_MEM_SIZE Each ...