寫了乙個簡單的對多游標控制的儲存過程

delimiter $$

drop procedure if

exists `test2`.

`sp_cur_demo`$$

create definer=

`root`@

`localhost` procedure `sp_cur_demo`(

)begin

-- variants declare

declare i int default 0;

declare cnt int default 0;

declare a,b int;

declare c char

(1);

-- define cursor

-- notice:cursor's declaration must be after ordinary variant.

declare cur1 cursor for

select a1 from t1;

declare cur2 cursor for

select a2 from t1;

declare cur3 cursor for

select a3 from t1;

-- fetch total number of the table.

select

count

(1)from t1 into cnt;

drop

table tmp;

-- create a temporary table to store the results.

create temporary table

ifnot

exists tmp(cur_c1 int, cur_c2 int,cur_c3 char

(1))

;open cur1;

open cur2;

open cur3;

-- begin fetch data into a new temporary table.

while i < cnt do

fetch cur1 into a;

fetch cur2 into b;

fetch cur3 into c;

insert

into tmp select a,b,c;

set i = i + 1;

end while;

close cur1;

close cur2;

close cur3;

end$

$delimiter ;

*from t1;

call sp_cur_demo();

select

*from tmp;