mysql ÊÂÎñ »Ø¹ö ʧ°Ü
CREATE PROCEDURE `ba3`(id int)
begin
START TRANSACTION;££££££¼ÓÉÏÁË
savepoint sp£»
begin
update ba2 a, (select max(a) as aa from ba2 where a < id) b set a.b=1 where a.a=b.aa;
delete from ba2 where a=id;
end;
if @@error_count=0 then
commit;
else
rollback sp;
end if£»
end;
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mysql> select * from ba2;£££££££££££££Ã»ÓÐ×÷²Ù×÷ǰ ÔʼÊý¾Ý
+------+-----+
| b | a |
+------+-----+
| 1 | 1 |
| 0 | 102 |
| 0 | 103 |
| 0 | 104 |
+------+-----+
4 rows in set (0.00 sec)
mysql> call ba2(103);
ERROR 1054 (42S22): Unknown column 'id22' in 'where clause'
mysql> select * from ba2;££££££££££££Ö´ÐÐÍêºó
+------+-----+
| b | a |
+------+-----+
| 1 | 1 |
| 1 | 102 | ££££££££££££££££££££££°´ÕÕ»á¹ö ²»Òò¸ÃÕâÀïb£½1 Ïà·´Ó¦¸ÃΪ0²Å¶Ô
| 0 | 103 |
| 0 | 104 |
+------+-----+
4 rows in set (0.00 sec)
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id INT NOT NULL PRIMARY KEY AUTO_INCREMENT
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