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今天就跟大家聊聊有关 mysql 中怎么实现定时任务，可能很多人都不太了解，为了让大家更加了解，丸趣 TV 小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。
定时任务
查看 event 是否开启: show variables like %sche%
将事件计划开启: set global event_scheduler=1;
关闭事件任务: alter event e_test ON COMPLETION PRESERVE DISABLE;
开户事件任务: alter event e_test ON COMPLETION PRESERVE ENABLE;
简单实例.
创建表 CREATE TABLE test(endtime DATETIME);
创建存储过程 test
CREATE PROCEDURE test ()
BEGIN
update examinfo SET endtime = now() WHERE id = 14;
END;
创建 event e_test
CREATE EVENT if not exists e_test
on schedule every 30 second
on completion preserve
do call test();
CREATE EVENT if not exists e_test
on schedule every 1 second
on completion preserve
do insert into aa values (now());
每隔 30 秒将执行存储过程 test, 将当前时间更新到 examinfo 表中 id=14 的记录的 endtime 字段中去.
触发器
delimiter //
CREATE TRIGGER trigger_htmlcache BEFORE INSERT ON t_model
FOR EACH ROW BEGIN
if CURDATE() NEW.time then
INSERT INTO t_htmlcache(id,url) value(NEW.id,NEW.url);
end if;
END;
//
通过建表 - Insert 的方式测试.
DELIMITER $$
DROP PROCEDURE IF EXISTS `njfyedepartment`.`sp_ireport` $$
CREATE ` PROCEDURE `sp_ireport`(IN qureyType VARCHAR(20),IN daytime VARCHAR(20),IN p_ids VARCHAR(50),IN c_ids VARCHAR(50),IN ct1_ids VARCHAR(50),IN ct2_ids VARCHAR(50),IN ku VARCHAR(50),IN ireport_chart varchar(50))
BEGIN
DECLARE i INT DEFAULT 1;
IF qureyType = insert OR qureyType = INSERT THEN
INSERT INTO ireport
(pid,cid,ct1id,ct2id,creatTime,crawlerNumber,WEEK)
SELECT province AS pid,
cityid AS cid,
category1id AS ct1id,
category2id AS ct2id,
(CURRENT_DATE) AS creatTime,COUNT(*) AS crawlerNumber,
(FLOOR(DAYOFMONTH(CURRENT_DATE)/8)+1) AS WEEK
FROM t_model t
WHERE TIME (CURRENT_DATE-1) AND TIME (CURRENT_DATE)
AND province IS NOT NULL
AND cityid IS NOT NULL
GROUP BY province,cityid,category1id,category2id;
END IF;
IF qureyType = month OR qureyType = MONTH THEN
IF EXISTS(SELECT * FROM information_schema.`TABLES` T WHERE TABLE_NAME = tmp_result AND TABLE_SCHEMA = ku) THEN
DROP TABLE tmp_result;
END IF;
CREATE TABLE tmp_result
(pid VARCHAR(50),pName VARCHAR(50),cid VARCHAR(50),cName VARCHAR(50),ct1id VARCHAR(50),ct1Name VARCHAR(50),
ct2id VARCHAR(50),ct2Name VARCHAR(50),month2 INTEGER,month3 INTEGER,month4 INTEGER,month5 INTEGER,month6 INTEGER,
month7 INTEGER,month7 INTEGER,month8 INTEGER,month9 INTEGER,month20 INTEGER,month21 INTEGER,month22 INTEGER,heji INTEGER);
lable_exit: BEGIN
SET @SqlCmd = INSERT INTO tmp_result (pid,pname,cid,cname,ct1id,ct1name,ct2id,ct2name)
SELECT pid,pname,cid,cname,ct1id,ct1name,ct2id,ct2name FROM
(SELECT ia.pid,a.name AS pname,ia.cid,b.name AS cname,ia.ct1id,c.name AS ct1name,ia.ct2id,d.name AS ct2name
FROM ireport ia
LEFT JOIN province a ON ia.pid=a.id
LEFT JOIN city b ON ia.cid=b.id
LEFT JOIN t_category1 c ON ia.ct1id=c.id
LEFT JOIN t_category2 d ON ia.ct2id=d.id
WHERE YEAR(ia.creatTime)=YEAR(?)
IF p_ids IS NOT NULL AND p_ids THEN
SET @SqlCmd = CONCAT(@SqlCmd , and ia.pid in (
SET @SqlCmd = CONCAT(@SqlCmd, p_ids);
SET @SqlCmd = CONCAT(@SqlCmd,)
END IF;
IF c_ids IS NOT NULL AND c_ids THEN
SET @SqlCmd = CONCAT(@SqlCmd , and ia.cid in (
SET @SqlCmd = CONCAT(@SqlCmd, c_ids);
SET @SqlCmd = CONCAT(@SqlCmd,)
END IF;
IF ct1_ids IS NOT NULL AND ct1_ids THEN
SET @SqlCmd = CONCAT(@SqlCmd , and ia.ct1id in (
SET @SqlCmd = CONCAT(@SqlCmd, ct1_ids);
SET @SqlCmd = CONCAT(@SqlCmd,)
END IF;
IF ct2_ids IS NOT NULL AND ct2_ids THEN
SET @SqlCmd = CONCAT(@SqlCmd , and ia.ct2id in (
SET @SqlCmd = CONCAT(@SqlCmd, ct2_ids);
SET @SqlCmd = CONCAT(@SqlCmd,)
END IF;
SET @SqlCmd = CONCAT(@SqlCmd ,) AS ir GROUP BY pid,pname,cid,cname,ct1id,ct1name,ct2id,ct2name;
PREPARE stmt1 FROM @SqlCmd;
SET @a = daytime;
EXECUTE stmt1 USING @a;
DEALLOCATE PREPARE stmt1;
LEAVE lable_exit;
END lable_exit;
WHILE i = 12 DO
lable_exit: BEGIN
SET @SqlCmd = UPDATE tmp_result AS a,
(
SELECT pid,cid,ct1id,ct2id,SUM(crawlerNumber) AS crawlerNumber FROM
(SELECT pid,cid,ct1id,ct2id,crawlerNumber FROM ireport WHERE MONTH(creatTime)=? AND YEAR(creatTime)=YEAR(?)) AS ir
GROUP BY pid,cid,ct1id,ct2id
) AS b
SET a.month
SET @SqlCmd = CONCAT(@SqlCmd , i);
SET @SqlCmd = CONCAT(@SqlCmd , =b.crawlerNumber
SET @SqlCmd = CONCAT(@SqlCmd , WHERE a.pid=b.pid AND a.cid=b.cid AND a.ct1id=b.ct1id AND a.ct2id=b.ct2id;
PREPARE stmt1 FROM @SqlCmd;
SET @a = i;
SET @b = daytime;
EXECUTE stmt1 USING @a,@b;
DEALLOCATE PREPARE stmt1;
LEAVE lable_exit;
END lable_exit;
lable_exit: BEGIN
SET @SqlCmd = UPDATE tmp_result SET month
SET @SqlCmd = CONCAT(@SqlCmd , i);
SET @SqlCmd = CONCAT(@SqlCmd , = 0 WHERE month
SET @SqlCmd = CONCAT(@SqlCmd , i);
SET @SqlCmd = CONCAT(@SqlCmd , IS NULL
PREPARE stmt1 FROM @SqlCmd;
EXECUTE stmt1;
DEALLOCATE PREPARE stmt1;
LEAVE lable_exit;
END lable_exit;
SET i = i + 1;
END WHILE;
UPDATE tmp_result SET heji=month2+month3+month4+month5+month6+month7+month7+month8+month9+month20+month21+month22;
INSERT INTO tmp_result (pid,pname,cid,cname,ct1id,ct1name,ct2id,ct2name,month2,month3,month4,month5,month6,month7,month7,month8,month9,month20,month21,month22,heji)
SELECT AS pid, — AS pname, AS cid, 总合计: AS cname, AS ct1id, — AS ct1name, AS ct2id, — AS ct2name,SUM(month2) AS month2,SUM(month3) AS month3,SUM(month4) AS month4,SUM(month5) AS month5,
SUM(month6) AS month6,SUM(month7) AS month7,SUM(month7) AS month7,SUM(month8) AS month8,SUM(month9) AS month9,SUM(month20) AS month20,SUM(month21) AS month21,SUM(month22) AS month22,SUM(heji) AS heji
FROM tmp_result;
IF ireport_chart = report OR ireport_chart = REPORT THEN
SELECT pid,pName,cid,cName,ct1id,ct1Name,ct2id,ct2Name,month2,month3,month4,month5,month6,month7,month7,month8,month9,month20,month21,month22,heji FROM tmp_result;
END IF;
IF ireport_chart = chart OR ireport_chart = CHART THEN
SELECT AS pid,pName, AS cid, AS cName, AS ct1id, AS ct1Name, AS ct2id, AS ct2Name,SUM(month2) as month2,SUM(month3) as month3,SUM(month4) as month4,SUM(month5) as month5,
SUM(month6) as month6,SUM(month7) as month7,SUM(month7) as month7,SUM(month8) as month8,SUM(month9) as month9,SUM(month20) as month20,SUM(month21) as month21,SUM(month22) as month22, AS heji
FROM (SELECT pid,pName,cid,cName,ct1id,ct1Name,ct2id,ct2Name,month2,month3,month4,month5,month6,month7,month7,month8,month9,month20,month21,month22 FROM tmp_result WHERE pname —) AS ir
GROUP BY pid;
END IF;
END IF;
IF qureyType = week OR qureyType = WEEK THEN
IF EXISTS(SELECT * FROM information_schema.`TABLES` T WHERE TABLE_NAME = tmp_result AND TABLE_SCHEMA = ku) THEN
DROP TABLE tmp_result;
END IF;
CREATE TABLE tmp_result
(pid VARCHAR(50),pName VARCHAR(50),cid VARCHAR(50),cName VARCHAR(50),ct1id VARCHAR(50),ct1Name VARCHAR(50),ct2id VARCHAR(50),ct2Name VARCHAR(50),week1 INTEGER,week2 INTEGER,week3 INTEGER,week4 INTEGER,heji INTEGER);
lable_exit: BEGIN
SET @SqlCmd = INSERT INTO tmp_result (pid,pname,cid,cname,ct1id,ct1name,ct2id,ct2name)
SELECT pid,pname,cid,cname,ct1id,ct1name,ct2id,ct2name FROM
(SELECT ia.pid,a.name AS pname,ia.cid,b.name AS cname,ia.ct1id,c.name AS ct1name,ia.ct2id,d.name AS ct2name
FROM ireport ia
LEFT JOIN province a ON ia.pid=a.id
LEFT JOIN city b ON ia.cid=b.id
LEFT JOIN t_category1 c ON ia.ct1id=c.id
LEFT JOIN t_category2 d ON ia.ct2id=d.id
WHERE YEAR(ia.creatTime)=YEAR(?) And MONTH(ia.creatTime)=MONTH(?)
IF p_ids IS NOT NULL AND p_ids THEN
SET @SqlCmd = CONCAT(@SqlCmd , and ia.pid in (
SET @SqlCmd = CONCAT(@SqlCmd, p_ids);
SET @SqlCmd = CONCAT(@SqlCmd,)
END IF;
IF c_ids IS NOT NULL AND c_ids THEN
SET @SqlCmd = CONCAT(@SqlCmd , and ia.cid in (
SET @SqlCmd = CONCAT(@SqlCmd, c_ids);
SET @SqlCmd = CONCAT(@SqlCmd,)
END IF;
IF ct1_ids IS NOT NULL AND ct1_ids THEN
SET @SqlCmd = CONCAT(@SqlCmd , and ia.ct1id in (
SET @SqlCmd = CONCAT(@SqlCmd, ct1_ids);
SET @SqlCmd = CONCAT(@SqlCmd,)
END IF;
IF ct2_ids IS NOT NULL AND ct2_ids THEN
SET @SqlCmd = CONCAT(@SqlCmd , and ia.ct2id in (
SET @SqlCmd = CONCAT(@SqlCmd, ct2_ids);
SET @SqlCmd = CONCAT(@SqlCmd,)
END IF;
SET @SqlCmd = CONCAT(@SqlCmd ,) AS ir GROUP BY pid,pname,cid,cname,ct1id,ct1name,ct2id,ct2name;
PREPARE stmt1 FROM @SqlCmd;
SET @a = daytime;
EXECUTE stmt1 USING @a,@a;
DEALLOCATE PREPARE stmt1;
LEAVE lable_exit;
END lable_exit;
WHILE i = 4 DO
lable_exit: BEGIN
SET @SqlCmd = UPDATE tmp_result AS a,
(
SELECT pid,cid,ct1id,ct2id,SUM(crawlerNumber) AS crawlerNumber FROM
(SELECT pid,cid,ct1id,ct2id,crawlerNumber FROM ireport WHERE WEEK=? AND MONTH(creatTime)=MONTH(?)) AS ir
GROUP BY pid,cid,ct1id,ct2id
) AS b
SET a.week
SET @SqlCmd = CONCAT(@SqlCmd , i);
SET @SqlCmd = CONCAT(@SqlCmd , =b.crawlerNumber
SET @SqlCmd = CONCAT(@SqlCmd , WHERE a.pid=b.pid AND a.cid=b.cid AND a.ct1id=b.ct1id AND a.ct2id=b.ct2id;
PREPARE stmt1 FROM @SqlCmd;
SET @a = i;
SET @b = daytime;
EXECUTE stmt1 USING @a,@b;
DEALLOCATE PREPARE stmt1;
LEAVE lable_exit;
END lable_exit;
lable_exit: BEGIN
SET @SqlCmd = UPDATE tmp_result SET week
SET @SqlCmd = CONCAT(@SqlCmd , i);
SET @SqlCmd = CONCAT(@SqlCmd , = 0 WHERE week
SET @SqlCmd = CONCAT(@SqlCmd , i);
SET @SqlCmd = CONCAT(@SqlCmd , IS NULL
PREPARE stmt1 FROM @SqlCmd;
EXECUTE stmt1;
DEALLOCATE PREPARE stmt1;
LEAVE lable_exit;
END lable_exit;
SET i = i + 1;
END WHILE;
UPDATE tmp_result SET heji=week1+week2+week3+week4;
INSERT INTO tmp_result (pid,pname,cid,cname,ct1id,ct1name,ct2id,ct2name,week1,week2,week3,week4,heji)
SELECT AS pid, — AS pname, AS cid, 总合计: AS cname, AS ct1id, — AS ct1name, AS ct2id, — AS ct2name, SUM(week1) AS week1,SUM(week2) AS week2,SUM(week3) AS week3,SUM(week4) AS week4,SUM(heji) AS heji
FROM tmp_result;
IF ireport_chart = report OR ireport_chart = REPORT THEN
SELECT pid,pName,cid,cName,ct1id,ct1Name,ct2id,ct2Name,week1,week2,week3,week4,heji FROM tmp_result;
END IF;
IF ireport_chart = chart OR ireport_chart = CHART THEN
SELECT as pid,pName, as cid, as cName, as ct1id, as ct1Name, as ct2id, as ct2Name,SUM(week1) AS week1,SUM(week2) AS week2,SUM(week3) AS week3,SUM(week4) AS week4, as heji
FROM (SELECT pid,cid,pname,cname,week1,week2,week3,week4 FROM tmp_result WHERE pname —) AS ir
GROUP BY pid;
END IF;
END IF;
END $$
DELIMITER ;
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