DELIMITER $$
CREATE PROCEDURE Load_Fact_List()
BEGIN
DECLARE Project_Number_Temp INT;
DECLARE Panel_Id_Temp INT;
DECLARE Employee_Id_Temp INT;
DECLARE Zip_Temp VARCHAR(255);
DECLARE Created_Date_Temp DATE;
DECLARE Country_Temp VARCHAR(255);
DECLARE no_more_rows BOOLEAN;
DECLARE loop_cntr INT DEFAULT 0;
DECLARE num_rows INT DEFAULT 0;
DECLARE load_cur CURSOR FOR
SELECT Project_Id, Panel_Id, Employee_Id, Zip, Created_Date
FROM Fact_List;
DECLARE CONTINUE HANDLER FOR NOT FOUND
SET no_more_rows = TRUE;
OPEN load_cur;
select FOUND_ROWS() into num_rows;
the_loop: LOOP
FETCH load_cur
INTO Project_Number_Temp, Panel_Id_Temp, Employee_Id_Temp, Zip_Temp, Created_Date_Temp;
IF no_more_rows THEN
CLOSE load_cur;
LEAVE the_loop;
END IF;
SET Country_Temp= (select Country from Zip where Zip= Zip_Temp);
INSERT INTO Test_Fact
(
Project_Key,
Campaign_Key,
Respondents_Key,
Event_Key,
Employee_Key,
Geography_Key,
Date_Key
)
SELECT (SELECT Project_Key from Project_Dim where Project_Id= Project_Number_Temp AND Quota_Country= Country_Temp),0,(SELECT MAX(Respondents_Key) from Respondents_Dim WHERE Panel_Id= Panel_Id_Temp),1,(select MAX(Employee_Key) from Employee_Dim WHERE Employee_Id= Employee_Id_Temp),(Select Geography_Key from Geography_Dim where Zip= Zip_Temp), (Select Date_Key from Date_Dim where Full_Date= Created_Date_Temp);
SET loop_cntr = loop_cntr + 1;
END LOOP the_loop;
select num_rows, loop_cntr;
END $$
上面的代码正常工作,但它是该死的缓慢。每1小时加载1000条记录。我没有记录加载到事实表中。任何人都可以建议我任何优化?存储过程需要执行一段时间?
要求是通过循环其他表并从维表中收集所需的键值来加载事实表。
你不需要游标。重写整个事情。你的'FOUND_ROWS()'也有错误的值,因为你没有使用'SQL_CALC_FOUND_ROWS'。 – fancyPants 2013-02-18 11:00:35
如果我不使用游标,那么我如何循环记录? – user1597811 2013-02-18 11:04:00
你不需要。只需'INSERT .... SELECT ...'并在必要时转换您的数据到'SELECT' – fancyPants 2013-02-18 11:12:00