linux - mysql 預存程序問題呼叫時候報錯

Question

請幫忙看看為什麼會報錯,小弟首次編寫這種類型的預存程序:
delimiter $$
create procedure mydb()
begin
declare dbname varchar(50);
declare stop int default 0;
declare cur cursor for (select name from name); //name表中存放的是資料庫的名稱
declare CONTINUE HANDLER FOR SQLSTATE '02000' SET stop = null;
open cur;
fetch cur into dbname; //遍歷資料庫的名稱
while ( stop is not null) do

begin
declare name varchar(200);
declare stop1 int default 0;
declare cur1  cursor for (select prounit_name from dbname.prounit);  //获取prounit表中prounit_name字段内容
declare CONTINUE HANDLER FOR SQLSTATE '02000' SET stop1 = null;
open cur1;
fetch cur1 into name;
while ( stop1 is not null) do
    update prounit set name='abc';
    fetch cur1 into name;
end while;
close cur1;
end ;

fetch cur into dbname;
end while;
close cur;
end ;
delimiter $$

在執行預存程序error:ERROR 1146 (42S02): Table 'dbname.prounit' doesn't exist

why?????

Answer 1

提示很明顯，表不存在
declare dbname varchar(50);名字覆蓋了？

Answer 2

說幾個文法問題吧.

1. while ( stop is not null) do中的stop應該遊標dbname才對,對遊標進行判斷.不然對stop沒有引用過

2. 最後一個end;,前面你定義了delimiter $$`以`$$為結束符,應該改為end$$,最後不要忘了結尾改成delimiter ;