Event Metadata
Metadata about events can be obtained as follows:
- Query the
event
table of theMariaDB
database. - Query the
EVENTS
table of theINFORMATION_SCHEMA
database. See , "TheINFORMATION_SCHEMA EVENTS
Table". - Use the
SHOW CREATE EVENT
statement. See , "SHOW CREATE EVENT
Syntax". - Use the
SHOW EVENTS
statement. See , "SHOW EVENTS
Syntax".
Event Scheduler Time Representation
Each session in MariaDB has a session time zone (STZ). This is the session time_zone
value that is initialized from the server's global time_zone
value when the session begins but may be changed during the session.
The session time zone that is current when a CREATE EVENT
or ALTER EVENT
statement executes is used to interpret times specified in the event definition. This becomes the event time zone (ETZ); that is, the time zone that is used for event scheduling and is in effect within the event as it executes.
For representation of event information in the mysql.event
table, the execute_at
, starts
, and ends
times are converted to UTC and stored along with the event time zone. This enables event execution to proceed as defined regardless of any subsequent changes to the server time zone or daylight saving time effects. The last_executed
time is also stored in UTC.
If you select information from mysql.event
, the times just mentioned are retrieved as UTC values. These times can also be obtained by selecting from the INFORMATION_SCHEMA.EVENTS
table or from SHOW EVENTS
, but they are reported as ETZ values. Other times available from these sources indicate when an event was created or last altered; these are displayed as STZ values. The following table summarizes representation of event times.