In MySQL, SLEEP() is a function that returns 0. The documentation says it returns 1 when it is interrupted but it does not explain how this behaviour could be achieved. I thinks it's safe to assume it always returns 0 for this discussion. The WHERE expression name = '' - SLEEP(3) ...
sql_mode: STRICT_ALL_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER Create Procedure: CREATE DEFINER=`root`@`localhost` PROCEDURE `sp_student`(IN p_name VARCHAR(20)) BEGIN IF p_name IS NULL OR p_name = "" THEN SELECT * FROM student ; ELSE SEL...
In this tutorial, you will learn how to use the PostgreSQL PG_SLEEP() function to pause the execution of a query.
Hello all, Can someone point me in the right direction? I'm trying to make my server sleep at night and wake in the morning (simply for sheer cost of electricity). I can easily get it to do this at specific times but i want it to only do it only when idle between 12 and 7 und...
我有几个函数,我想在无限循环中同时运行,但是所有函数都应该以不同的时间间隔运行。例如,以下代码: functionA() functionB() after 2 minutes repeat我知道使用time.sleep或dateime.now()很热,但我不知道如何让functionA和B在同一个文件中独立运行和等待。
参数列表:IN、OUT、或INOUT只对PROCEDURE是合法的(FUNCTION中是默认IN参数,所以声明存储函数入参的时候不能声明IN,会报错,因为默认是IN)。 RETURNS子句只能对FUNCTION作指定,对函数而言这是强制的。它用来指定函数的返回类型,而且函数体必须包含一个RETURN value语句。
MySQL in a Nutshell, 2nd Edition by Russell J. T. Dyer Name SLEEP() Synopsis SLEEP(seconds) This function pauses the execution of an SQL statement in which it is given for the number of seconds given. It returns 0 in the results if successful; 1 if not. This function became available...
sh #!/bin/bash echo -n "倒计时:" for i in `seq 9 -1 1` do echo -n -e "\b$i" sleep 1 done echo 执行代码 [root@localhost ~]# ./sleep.sh 倒计时:8 代码语言:javascript 代码运行次数:0 运行 AI代码解释 [root@localhost ~]# cat for_sleep.sh #!/bin/bash #监控主机存活的脚本...
The Timeout:PgSleep event occurs in Aurora PostgreSQL when a server process has called the pg_sleep function and is waiting for the sleep timeout to expire.
CONVERT FUNCTION将锁从一个状态转换成另一个状态 RELEASE FUNCTION释放锁 SLEEP PROCEDURE这是实现延迟时间的存储过程,可以指定睡眠时间间隔 本文章主要讲解SLEEPPROCEDURE。 DBMS_LOCK.SLEEP()存储过程: 作用:使用这个存储过程可以中止会话一段时间 语法:DBMS_LOCK.SLEEP(seconds IN NUMBER);单位为“秒”,最小的增量可...