执行语句：

create procedure sleep_test (in sleeptime int)

begin

  declare wait_until timestamp;

  set wait_until = (current timestamp + sleeptime seconds);

    while (wait_until > current timestamp)

    do

  end while;

END

一直报错

解决办法：修改语句为@结尾，并且修改客户端的sql配置，在窗口-》首选项中，（1）将语句分隔符改成@ (2)勾选忽略本地分隔符

SQL语句为：

create procedure sleep_test (in sleeptime int)

begin

  declare wait_until timestamp;

  set wait_until = (current timestamp + sleeptime seconds);

    while (wait_until > current timestamp)

    do

  end while;

END@