今天我發現了MySQL的一個Bug
阿新 • • 發佈：2019-02-03
今天有個測試人員報告說匯入通訊錄的程式有點問題，無法匯入或者只能部分匯入，但不會報錯。
匯入通訊錄時會檢查聯絡人姓名是否會在待匯入的群組中，如果不在才匯入，否則忽略。
我從日誌中找出了一個SQL語句，如下：
SELECT contact_id, contact_name, contact_title, gender, birthday, specday, idno, profession,
company, dept, region,
address, postcode, mobile, phone, fax, email, qq, home_phone, home_address, other, remarks,
tenant_id, created_by, create_time, modified_by, modify_time FROM mab_contact_info
WHERE contact_name = '陳志林'
AND contact_id IN (SELECT contact_id FROM mab_contact_group WHERE contact_group_id = 36
我一看，就覺得子查詢有點問題，因為mab_contact_group表中根本就沒有contact_id欄位啊。
mysql> desc mab_contact_group;
+--------------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+--------------------+--------------+------+-----+---------+----------------+
| contact_group_id | int(11) | NO | PRI | NULL | auto_increment |
| contact_group_name | varchar(32) | NO | | NULL | |
| super_group_id | int(11) | YES | MUL | NULL | |
| tenant_id | int(11) | NO | MUL | NULL | |
| contact_group_path | varchar(256) | YES | | NULL | |
| created_by | int(11) | YES | MUL | NULL | |
| create_time | datetime | NO | | NULL | |
| modified_by | int(11) | YES | MUL | NULL | |
| modify_time | datetime | YES | | NULL | |
+--------------------+--------------+------+-----+---------+----------------+
9 rows in set (0.00 sec)
但是程式沒有報錯。於是我把它貼到MySQL中執行，確實不報錯，而且找到了資料：
mysql> SELECT contact_id, contact_name, contact_title, gender, birthday, specday, idno, profession, company, dept, region, -> address, postcode, mobile, phone, fax, email, qq, home_phone, home_address, other, remarks, tenant_id, created_by, create_time, modified_by, modify_time FROM mab_contact_info-> WHERE contact_name = '陳志林' AND contact_id IN (SELECT contact_id FROM mab_contact_group WHERE contact_group_id = 36); +------------+--------------+---------------+--------+----------+---------+------+------------+---------+------+--------+---------+----------+-------------+-------+------+-------+------+------------+--------------+-------+-----------------------------------------------------------------+-----------+------------+---------------------+-------------+-------------+ | contact_id | contact_name | contact_title | gender | birthday | specday | idno | profession | company | dept | region | address | postcode | mobile | phone | fax | email | qq | home_phone | home_address | other | remarks | tenant_id | created_by | create_time | modified_by | modify_time | +------------+--------------+---------------+--------+----------+---------+------+------------+---------+------+--------+---------+----------+-------------+-------+------+-------+------+------------+--------------+-------+-----------------------------------------------------------------+-----------+------------+---------------------+-------------+-------------+ | 138 | 陳志林 | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | 13975188486 | NULL | NULL | NULL | NULL | NULL | NULL | NULL | 匯入自《20121128115430956106_contact班主任及管理人員.xls》第2行 | 3000 | 9024 | 2012-11-28 11:54:32 | NULL | NULL | +------------+--------------+---------------+--------+----------+---------+------+------------+---------+------+--------+---------+----------+-------------+-------+------+-------+------+------------+--------------+-------+-----------------------------------------------------------------+-----------+------------+---------------------+-------------+-------------+ 1 row in set (0.00 sec) 但是把其中的子查詢單獨執行，會有問題。 mysql> SELECT contact_id FROM mab_contact_group WHERE contact_group_id = 36; ERROR 1054 (42S22): Unknown column 'contact_id' in 'field list' mysql>
我的第一反應是，我發現MySQL的一個Bug啦。
。。。。。。
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