MySQL 8.4 Release Notes
15.7.7.8 SHOW 创建事件语句
SHOW CREATE EVENT event_name
该语句显示了CREATE EVENT
语句,用于重新创建给定的事件。它需要对从事件显示的数据库拥有EVENT
权限。例如(使用同一个事件e_daily
,定义并在第15.7.7.19节,“SHOW EVENTS 语句”中被修改):
mysql> SHOW CREATE EVENT myschema.e_daily\G
*************************** 1. row ***************************
Event: e_daily
sql_mode: ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,
NO_ZERO_IN_DATE,NO_ZERO_DATE,
ERROR_FOR_DIVISION_BY_ZERO,
NO_ENGINE_SUBSTITUTION
time_zone: SYSTEM
Create Event: CREATE DEFINER=`jon`@`ghidora` EVENT `e_daily`
ON SCHEDULE EVERY 1 DAY
STARTS CURRENT_TIMESTAMP + INTERVAL 6 HOUR
ON COMPLETION NOT PRESERVE
ENABLE
COMMENT 'Saves total number of sessions then
clears the table each day'
DO BEGIN
INSERT INTO site_activity.totals (time, total)
SELECT CURRENT_TIMESTAMP, COUNT(*)
FROM site_activity.sessions;
DELETE FROM site_activity.sessions;
END
character_set_client: utf8mb4
collation_connection: utf8mb4_0900_ai_ci
Database Collation: utf8mb4_0900_ai_ci
character_set_client
是事件创建时的会话值character_set_client
系统变量的值。collation_connection
是事件创建时的会话值collation_connection
系统变量的值。Database Collation
是与事件关联的数据库的排序规则。
输出反映了事件的当前状态(ENABLE
),而不是创建时的状态。