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https://dev.mysql.com/doc/refman/5.7/en/show-events.html
row *************************** Db: myschema Name: e_daily Definer: jon@ghidora Time zone: SYSTEM Type: RECURRING Execute at: NULL Interval value: 1 Interval field: DAY Starts: 2018-08-08 11:06:34 Ends: NULL Status: ENABLED Originator: 1 ... SHOW ...
https://dev.mysql.com/doc/refman/5.7/en/tracing-example.html
(Observe that it could have a match, were the operator a null-safe equals <=>). Now we can examine the trace, whose first column (QUERY), containing the original statement to be traced, is shown here: SELECT * FROM ...
https://dev.mysql.com/doc/refman/5.7/en/cast-functions.html
row *************************** Table: new_table Create Table: CREATE TABLE `new_table` ( `c1` date DEFAULT NULL ) ENGINE=InnoDB DEFAULT CHARSET=latin1 The cast functions are useful for sorting ENUM columns in lexical order. Examples: For conversion ... Table 12.15 Cast Functions and Operators Name Description BINARY Cast a string to a binary string CAST() Cast a value as a certain type CONVERT() Cast a value as a certain type Cast functions and operators enable conversion of values from one data type to ...
https://dev.mysql.com/doc/refman/5.7/en/version-tokens-usage.html
Otherwise, an error occurs: mysql> SELECT version_tokens_lock_shared('lock1', 'lock2', 0); +-------------------------------------------------+ | version_tokens_lock_shared('lock1', 'lock2', 0) | +-------------------------------------------------+ | ... Before using Version Tokens, install it according to the instructions provided at Section 5.5.5.2, “Installing or Uninstalling Version ...
https://dev.mysql.com/doc/refman/5.7/en/dynamic-format.html
NULL columns require additional space in the row to record whether their values are NULL. Each NULL column takes one bit extra, rounded up to the nearest byte. Dynamic storage format is used if a MyISAM table contains any variable-length columns ...
https://dev.mysql.com/doc/refman/5.7/en/events-privileges.html
If you inspect the MySQL error log (hostname.err), you can see that the event is executing, but the action it is attempting to perform fails: 2013-09-24T12:41:31.261992Z 25 [ERROR] Event Scheduler: [jon@ghidora][cookbook.e_store_ts] INSERT command ... To enable or disable the execution of scheduled events, it is necessary to set the value of the global event_scheduler system ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-innodb-metrics-table.html
row *************************** NAME: dml_inserts SUBSYSTEM: dml COUNT: 3 MAX_COUNT: 3 MIN_COUNT: NULL AVG_COUNT: 0.046153846153846156 COUNT_RESET: 3 MAX_COUNT_RESET: 3 MIN_COUNT_RESET: NULL AVG_COUNT_RESET: NULL TIME_ENABLED: 2014-12-04 14:18:28 ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-fulltext-index.html
If you want to create your own FTS_DOC_ID column, the column must be defined as BIGINT UNSIGNED NOT NULL and named FTS_DOC_ID (all uppercase), as in the following example: Note The FTS_DOC_ID column does not need to be defined as an AUTO_INCREMENT ... Full-text indexes are created on text-based columns (CHAR, VARCHAR, or TEXT columns) to speed up queries and DML operations on data contained within those ...
https://dev.mysql.com/doc/refman/5.7/en/json-utility-functions.html
An error results when json_val is not NULL, and is not—or cannot be successfully parsed as—a JSON document. This section documents utility functions that act on JSON values, or strings that can be parsed as JSON values. JSON_PRETTY() prints out ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-key.html
Unlike the case with other partitioning types, columns used for partitioning by KEY are not restricted to integer or NULL values. This is a known issue in MySQL 5.7 which is addressed in MySQL 8.0, where this permissive behavior is deprecated, and ... Partitioning by key is similar to partitioning by hash, except that where hash partitioning employs a user-defined expression, the hashing function for key partitioning is supplied by the MySQL ...