儲存過程 游標 錯誤處理（重新生成使用者編號）

--

set_account_data 重新生成使用者編號
begin
declare temp_id int(8); /*
使用者id
*/declare temp_manager int(8); /*
上級id
*/declare temp_accounter_no varchar(64); /*
上級編碼
*/declare temp_max_no varchar(64); /*
上級的最大下級編碼
*/declare max_no varchar(64); /*
編碼*/
declare str1 varchar(64); /*
編碼*/
declare temp_no int(8); /*
編碼*/
declare temp_level int(8); /*
級次*/
declare state varchar(30); /*
錯誤處理監聽變數
*//*
定義使用者表游標
*/declare account_cursor cursor
forselect id,manager from account order
bymanager,id;
/*定義錯誤處理監聽，用於結束游標迴圈
*/declare
continue handler for
1329
begin
set state =
'error';
end; 
open
account_cursor;
repeat
fetch account_cursor into
temp_id,temp_manager;
if (temp_id =
1) then
update account set leaf =
0,no ='01
',level=1
where id =1;
else
/*設定上級leaf為0
*/update account set leaf =
0where id =
temp_manager;
/*查詢上級編號
*/select no into temp_accounter_no from account where id =
temp_manager;
/*設定上級編碼
*/update account set pno = temp_accounter_no where id =
temp_id;
/*查詢上級原有的最大下級編碼
*/select
max(no) into temp_max_no from account where pno =
temp_accounter_no;
/*如果最大下級編碼為空，生成新的編碼，否則把原來的編碼加一
*/if (temp_max_no is
null) then
set max_no = concat(temp_accounter_no, '
0001');
else
set str1 = substr(temp_max_no,length(temp_max_no)-
3,4);
set temp_no =
str1;
set temp_no = temp_no +1;
set str1 =
temp_no;
if (length(str1) =
1) then
set str1 = concat('
000'
, str1);
elseif (length(str1) 
=2) then
set str1 = concat('00'
, str1);
elseif (length(str1) 
=3) then
set str1 = concat('0'
, str1); 
endif
; 
set max_no =
concat(temp_accounter_no, str1);
endif
; 
update account set no = max_no where id =
temp_id;
set temp_level = (length(max_no) +
2) /4;
update account set
level
= temp_level where id =
temp_id;
endif
; until state ='
error
'end
repeat;
close
account_cursor;
/*修改leaf為null的為1
*/update account set leaf =
1where leaf is
null
; 
return0;
end

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