mysql - 如何在mysql中存储存储过程的返回值

Question

虽然 Stack Overflow 中有很多关于这个问题的问题，但我无法正确解决，任何人都可以帮助我解决这个问题，假设有两个存储过程，

CREATE PROCEDURE `procOne`(stName varchar(7),fullItemCode varchar(12), fullLedNo varchar(12))
BEGIN
set @x = concat('
SELECT ID, Uprice FROM ',stName,' 
where Uprice > 0 and FulItmCode="',fullItemCode,'" and FullLedgerNo = "',fullLedNo,'" order by Dat desc limit 1;
');
PREPARE stmt FROM @x;
    EXECUTE stmt;
    DEALLOCATE PREPARE stmt;
END

和

CREATE PROCEDURE `prcTwo`()
BEGIN

CREATE TEMPORARY TABLE tmpStore (
  ID int(10),
  Uprice decimal(18,2)
)

insert into tmpStore exec procOne(@param1, @param2) 

select * from tempStore; 

DROP TABLE tmpStore;

END

我试过了，但是在尝试保存 prcTwo

时出现以下错误

ERROR 1064: 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
'insert into tmpStore exec procOne 'St_BFG','SCI019', 'BIO-JVS-30' output
sele' at line 9 SQL Statement: CREATE DEFINER=user1@localhost PROCEDURE 
prcTwo() BEGIN CREATE TEMPORARY TABLE tmpStore ( ID int(10), Uprice 
decimal(18,2) ) insert into tmpStore exec procOne 'St_BFG','SCI019', 
'BIO-JVS-30' output  select * from tempStore; DROP TABLE tmpStore; END

Answer 1

像这样使用输出参数

CREATE PROCEDURE abc(IN id INTEGER, OUT text VARCHAR(255))
BEGIN 
    SET text = 'asd';
END

你可以这样调用这个过程:

SET @outvar = '';
CALL abc(1, @outvar);

'asd' 将保存在@outvar 中