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https://dev.mysql.com/doc/refman/5.7/en/faqs-triggers.html
Can a table have multiple triggers with the same trigger event and action time? A.5.11. Is it possible for a trigger to update tables on a remote server? A.5.12. Information about triggers can be obtained by querying the INFORMATION_SCHEMA.TRIGGERS ...Where can I find the documentation for MySQL 5.7 triggers? ...
https://dev.mysql.com/doc/refman/5.7/en/fulltext-natural-language.html
For each row in the table, MATCH() returns a relevance value; that is, a similarity measure between the search string and the text in that row in the columns named in the MATCH() list. The search must be performed using a full-text index scan rather ... By default or with the IN NATURAL LANGUAGE MODE modifier, the MATCH() function performs a natural language search for a string against a text ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-information-schema-internal-data.html
The data exposed by the transaction and locking tables (INNODB_TRX, INNODB_LOCKS, and INNODB_LOCK_WAITS) represents a glimpse into fast-changing data. This is not like user tables, where the data changes only when application-initiated updates ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-memcached-troubleshoot.html
loose-daemon_memcached_option='-c 64' To troubleshoot problems where the memcached daemon is unable to store or retrieve InnoDB table data, encode the -vvv memcached option in the daemon_memcached_option configuration parameter in the MySQL ... This ...
https://dev.mysql.com/doc/refman/5.7/en/insert-on-duplicate.html
In general, you should try to avoid using an ON DUPLICATE KEY UPDATE clause on tables with multiple unique indexes. It is possible to use IGNORE with ON DUPLICATE KEY UPDATE in an INSERT statement, but this may not behave as you expect when ... If ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-command-options.html
This option is on by default, which enables database, table, and column name completion. The DROP TABLE and CREATE TABLE statements are not executed because the default database is not db1, even though the statements name a table in db1. The INSERT ... mysql supports the following options, which can be specified on the command line or in the [mysql] and [client] groups of an option ...
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/identifier-mapping.html
Because such conversions are deprecated, the --fix-db-names and --fix-table-names options for mysqlcheck and the UPGRADE DATA DIRECTORY NAME clause for the ALTER DATABASE statement are also deprecated. There is a correspondence between database and ...For the data and index files, the exact representation on disk is storage engine ...