Question

我有这样的程序但是我一直想要执行它我在声明变量附近时会出现语法错误...任何人都可以告诉我我的错误是什么

我有两个表用于问题，一个用于答案，excel文件用于将数据迁移到此表。 excel中的数据如下所示：

ID      N       TITLE
3       99500   question1
4       
5               answer1
6       X       answer2
7               answer3




 DELIMITER $$
create Procedure proc_answermigration()
begin

  DECLARE @i,@n,@q,@ind,@pt varchar default '';
  DECLARE @done,@aord int default 0;
  DECLARE cur cursor for select ID, N, question, from test.qustionmigration;
  DECLARE CONTINUE HANDLER FOR NOT FOUND SET @done = 1;
  open cur;

  read_loop: Loop
  fetch cur into i,n,q;

  IF done THEN
  LEAVE read_loop;
  END IF;

  if n <> '' or n <> 'X'
    then
      select @ind = iq.question_id, @pt = iq.points from test.qustionmigration qm
      inner join ilias.qpl_questions iq on qm.question = iq.question_text
      where question = q
  else
      insert into qpl_a_sc
      (
        answer_id,
        question_fi,
        answertext,
        points,
        aorder,
        tstamp
      )
      select (select sequence from qpl_a_sc_seq),
              ind,
              question,
              pt,
              aord,
              '1342884200'
      from test.qustionmigration
      end if;

  update qpl_a_sc_seq
  set sequence = sequence + 1;

  if @aord = 0 then set @aord = 1;
  elseif @aord = 1 then set @aord = 2;
  else set @aord = 0;

  end loop;
  CLOSE cur;

end$$

DELIMITER ;

我更正了一些陈述，但仍然有语法错误说：

#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 'LOOP; close cur; end' at line 52


DELIMITER $$
create Procedure proc_answermigration()
begin

  DECLARE i,n,q,ind,pt varchar(500) default '';
  DECLARE done,aord,c int default 0;
  DECLARE cur cursor for select ID, N, question from test.qustionmigration;
  DECLARE  CONTINUE HANDLER FOR NOT FOUND SET done = 1;

  open cur;


  read_loop: LOOP
    fetch cur into i,n,q;
    IF n <> '' or n <> 'X'
      then
        select ind = iq.question_id, pt = iq.points from test.qustionmigration qm
        inner join ilias.qpl_questions iq on qm.question = iq.question_text
        where question = q;
    else
        insert into qpl_a_sc
        (
          answer_id,
          question_fi,
          answertext,
          points,
          aorder,
          tstamp
        )
        select (select sequence from qpl_a_sc_seq),
                ind,
                question,
                pt,
                aord,
                '1342884200'
        from test.qustionmigration;
    end IF;

    update qpl_a_sc_seq
    set sequence = sequence + 1;

    if aord = 0 then set aord = 1;
    elseif aord = 1 then set aord = 2;
    else set aord = 0;

    set c = c + 1;


  IF done = 1 THEN
      LEAVE read_loop;
  END IF;

  END LOOP;

  close cur;
end$$
DELIMITER ;

Answer 1

你不能DECLARE user variables（以@开头）。只需SET他们，或者使用local variables（不是以@开头）。

Answer 2

您的上一个IF ELSE阻止了END IF：

if @aord = 0 then set @aord = 1;
elseif @aord = 1 then set @aord = 2;
else set @aord = 0;
/* END IF either belongs here or after following statements, depending on your intended logic */
/* Either way, this block is unclosed when you close the loop */
end if

当解析器读取END LOOP;时，它正在查找END IF，并在LOOP报告语法错误。

mysql中的游标错误语法

2 个答案: