从mysql触发器调用python脚本

Question

我看了http://crazytechthoughts.blogspot.sg/2011/12/call-external-program-from-mysql.html并安装了lib_mysqludf_sys

并尝试在mysql触发器中调用python脚本。

这是我的测试触发器：

DROP TRIGGER IF EXISTS ljj_rigger;

CREATE TRIGGER ljj_rigger 
AFTER INSERT ON test_trigger 
FOR EACH ROW 
BEGIN
        DECLARE cmd1 CHAR(255);
        DECLARE cmd2 CHAR(255);
        DECLARE cmd3 CHAR(255);
        DECLARE result1 int(10);
        DECLARE result2 int(10);
        DECLARE result3 int(10);
        SET cmd1 = 'python /home/jaskey1103/python/test.py';
        SET cmd2 = 'touch /home/jaskey1103/python/bybash';
        SET cmd3 = '/home/jaskey1103/python/callpy.sh';

        SET result1 = sys_exec(cmd1);
        SET result2 = sys_exec(cmd2);
        SET result3 = sys_exec(cmd3);

        insert into test_trigger_copy(value) values(result1);
        insert into test_trigger_copy(value) values(result2);
        insert into test_trigger_copy(value) values(result3);
END;


commit;

但是当触发器运行时，我可以找到新文件bytouch，但无法找到python脚本创建的新文件。

为了进行测试，将复制表中的插入结果为：0,0,512。

test.py：

import os

def touch(fname, times=None):
    fhandle = open(fname, 'a')
    try:
        os.utime(fname, times)
    finally:
        fhandle.close()

print 'creating file'
touch("bypython")        

callpy.sh：

python test.py