我已经准备了一个存储过程，如果我从MySQL控制台进行调用，它可以正常运行。但是当在python中运行mysql.connector控制器时，正确执行插入过程。
然而，结果并没有带来与fectchall()，因为以下错误：

File "/home/sis1/prueba/prueba.py", line 16, in <module>
    reg=conn.fetchall()
  File "/usr/lib/pymodules/python2.7/mysql/connector/cursor.py", line 551, in fetchall
    raise errors.InterfaceError("No result set to fetch from.")
InterfaceError: No result set to fetch from.`

下面是存储过程：

DROP PROCEDURE IF EXISTS pr_prueba;    
CREATE DEFINER = rooter@localhost PROCEDURE pr_prueba(IN p_emp tinyint,OUT mensaje varchar(50),OUT registros integer)    
BEGIN    
    DECLARE numreg INT (10);    
    DECLARE tabla VARCHAR (30);     
    DECLARE emp TINYINT(2);    
    SET @tabla = CONCAT("emp",p_emp,".usuario");    
    SET @emp = CAST(p_emp AS UNSIGNED);    
    SET @sql_text = CONCAT("INSERT INTO ",@tabla," ( name, lastname ) (SELECT UPPER(name), UPPER(lastname) FROM tablas GROUP BY tablas.operador);");    
    PREPARE stmt FROM @sql_text;    
    EXECUTE stmt;    
    DEALLOCATE PREPARE stmt;    
    SET @mensaje="OK";    
    SET @sql_text = CONCAT("SELECT COUNT(*) INTO @numreg FROM ",@tabla,";");    
    PREPARE stmt FROM @sql_text;    
    EXECUTE stmt;    
    DEALLOCATE PREPARE stmt;    
    SET @registros=@numreg;    
    SELECT @mensaje as mensaje, @registros as registros;    
END ;

下面是Python代码：

import sys    
import mysql.connector    
if (__name__=='__main__'):    
  db = mysql.connector.connect(host="192.168.1.1",user="de",passwd="de2",database="dbim" )    
  conn = db.cursor()    
  args=(1,"",0)    
  conn.callproc("pr_prueba",args)    
  reg=conn.fetchall()    
  try:    
    db.commit()    
  except:    
    db.rollback()    
    print "error"    
  conn.close()    
  db.close()