23.4.4 Event Metadata
To obtain metadata about events:
eventtable of the
EVENTStable of the
INFORMATION_SCHEMAdatabase. See Section 24.8, “The INFORMATION_SCHEMA EVENTS Table”.
Event Scheduler Time Representation
Each session in MySQL 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
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.