mysql 5.1：我如何使用benchmark（）命令测试对存储过程的调用？

Question

我试图基准存储过程。

select benchmark(100000000,(select 1)); 

这个基准测试工作

但下面的基准并不：

do benchmark(1000,(call test_login_user('a'))); 

它产生以下错误：

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'call xpofb_login_user('a')))' at line 1 

任何想法如何解决这个问题？

Answer 1

不能

http://dev.mysql.com/doc/refman/5.0/en/information-functions.html#function_benchmark

Only scalar expressions can be used. Although the expression can be a subquery, it must return a single column and at most a single row. For example, BENCHMARK(10, (SELECT * FROM t)) will fail if the table t has more than one column or more than one row.

Answer 2

你不能用标杆做到这一点（），但你可以创建一个存储过程来做到这一点。

下面是一个例子：

delimiter $$ 

create procedure benchmark_test_login_user (p_username varchar(100), 
    p_count int unsigned) 
begin 
    declare v_iter int unsigned; 
    set v_iter = 0; 
    while v_iter < p_count 
    do 
    call test_login_user(p_username); 
    set v_iter = v_iter + 1; 
    end while; 
end $$ 

delimiter ; 

call benchmark_test_login_user('a',1000);