mysql - 过程中出现错误 1064

Question

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual thatcorresponds to your MySQL server version for the right syntax to use near '= (select ifnull(max(manufactureId+1),1) from tbl_Manufacturer                ) ;

create procedure ManufactureAdd(
    p_manufactureName longtext,
    p_address longtext,
    p_phone varchar(50),
    p_email varchar(50),
    p_description longtext
)
begin
    declare p_manufactureId = (select ifnull(max(manufactureId+1),1) from tbl_Manufacturer
    ) ;

    insert into tbl_Manufacturer(
        manufactureId,   
 manufactureName,   
 address,   
 phone,   
 email,   
 description  
)  
VALUES      
(  
 p_manufactureId,   
 p_manufactureName,   
 p_address,   
 p_phone,   
 p_email,   
 p_description  
)  ;

SELECT p_manufactureId  ;

end

Answer 1

尝试使用 SELECT..INTO 子句和简单的用户变量 -

CREATE PROCEDURE ManufactureAdd(
  p_manufactureName longtext,
  p_address longtext,
  p_phone varchar(50),
  p_email varchar(50),
  p_description longtext)
BEGIN
  SELECT IFNULL(MAX(manufactureId + 1), 1) INTO @p_manufactureId FROM tbl_Manufacturer;

  INSERT INTO tbl_Manufacturer (manufactureId, manufactureName, address, phone, email, DESCRIPTION)
    VALUES (@p_manufactureId, p_manufactureName, p_address, p_phone, p_email, p_description);

  SELECT @p_manufactureId;
END