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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 ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-miscellaneous-tables.html
The following sections describe tables that do not fall into the table categories discussed in the preceding sections: host_cache: Information from the internal host cache.
https://dev.mysql.com/doc/refman/5.7/en/replication-features-checksum-table.html
CHECKSUM TABLE returns a checksum that is calculated row by row, using a method that depends on the table row storage format. The storage format is not guaranteed to remain the same between MySQL versions, so the checksum value might change ...
https://dev.mysql.com/doc/refman/5.7/en/sql-prepared-statements.html
Prepared Statements in SQL Scripts An alternative SQL interface to prepared statements is available. Metadata changes to tables or views referred to by prepared statements are detected and cause automatic repreparation of the statement when it is ...
https://dev.mysql.com/doc/refman/5.7/en/create-table-secondary-indexes.html
Even with additional write costs, secondary indexes on virtual columns may be preferable to generated stored columns, which are materialized in the clustered index, resulting in larger tables that require more disk space and memory. row ...A ...
https://dev.mysql.com/doc/refman/5.7/en/reproducible-test-case.html
For information about steps to take when encountering InnoDB table corruption, see Section 1.5, “How to Report Bugs or Problems”. If you encounter corrupted MyISAM tables or if mysqld always fails after some update statements, you can test ...
https://dev.mysql.com/doc/refman/5.7/en/sys-innodb-buffer-stats-by-table.html
These views summarize the information in the INFORMATION_SCHEMA INNODB_BUFFER_PAGE table, grouped by schema and table. Warning Querying views that access the INNODB_BUFFER_PAGE table can affect performance. Do not query these views on a production ...To avoid impacting performance on a production system, reproduce the issue you want to investigate and query buffer pool statistics on a test ...
https://dev.mysql.com/doc/refman/5.7/en/audit-log-reference.html
Audit Log Tables MySQL Enterprise Audit uses tables in the mysql system database for persistent storage of filter and user account data. The tables can be accessed only by users who have privileges for that database. The tables use the InnoDB ...