Mysql 卡在存储过程上
我有一个查询在最新的mysql中运行良好Mysql 卡在存储过程上,mysql,stored-procedures,Mysql,Stored Procedures,我有一个查询在最新的mysql中运行良好 select Title, Link from PlaylistItem where PlaylistId = 1; 返回: +---------------------------+---------------------------------------------+ | Title | Link | +------------
select Title, Link
from PlaylistItem
where PlaylistId = 1;
返回:
+---------------------------+---------------------------------------------+
| Title | Link |
+---------------------------+---------------------------------------------+
| Regina Spektor - Fidelity | https://www.youtube.com/watch?v=wigqKfLWjvM |
+---------------------------+---------------------------------------------+
但是,当我编写存储过程时,会得到一个空的结果集
存储过程如下所示:
/* Fetch all playlist items for a playlist */
delimiter //
create procedure MixtapeDating.GetPlaylist
(
in Id int
)
begin
select Id, Title, Link
from PlaylistItem
where PlaylistId = @Id;
end //
delimiter ;
我这样运行程序:
call GetPlaylist(1);
在mysql中,前缀为@are的变量不是存储过程级变量,因此@id与id不同。此外,id也是一个字段名,因此必须重命名参数
delimiter //
create procedure MixtapeDating.GetPlaylist
(
in var_Id int
)
begin
select Id, Title, Link
from PlaylistItem
where PlaylistId = var_Id;
end //
delimiter ;
如何运行该过程?