修改枚举列成功,但值无效

时间:2013-01-07 18:14:20

标签: mysql enums

执行此声明时:

ALTER TABLE person MODIFY COLUMN subcommittee
  ENUM('Arts','Bus','HC','IA','Pol','ST','Floater','Student') NULL DEFAULT NULL;

回应是

2801 row(s) affected Records: 2801  Duplicates: 0  Warnings: 0

然后这句话:

update person set subcommittee = 'Student' where person_pk = 1381;

始终会出现此错误消息:

Error Code: 1265. Data truncated for column 'subcommittee' at row 1

(第1381人在数据库中,如果您想知道,或者我甚至不会收到此错误消息。)

选择其他枚举有效:

update person set subcommittee = 'Floater' where person_pk = 1381;

1 row(s) affected Rows matched: 1  Changed: 1  Warnings: 0

当我使用PDO从我的PHP应用程序收到错误时,我首先注意到了这一点,但随后在MySQLWorkbench中重现了它,从中获取了上述内容。

也许完全删除该列并重新定义它会解决问题,但这是一个实时数据库,我只想在其中添加一个额外的枚举值(学生)。

我尝试重新输入alter语句,将其复制到文本编辑器以检查字符,以及一些其他的东西来排除值中奇怪的不可见字符。我还重新安排了值:

ALTER TABLE person MODIFY COLUMN subcommittee
  ENUM('Arts','Bus','HC','IA','Pol','ST', 'Student','Floater') NULL DEFAULT NULL;

没有快乐。

我在谷歌搜索时看到了一些与修改枚举列相关的错误。有谁知道这是一个MySQL错误吗?

(MySQL版本5.5.28。)


一些人要求的一些数据:

mysql> describe person;
+------------------------------+-------------------------------------------------------------+------+-----+---------+----------------+
| Field                        | Type                                                        | Null | Key | Default | Extra          |
+------------------------------+-------------------------------------------------------------+------+-----+---------+----------------+
| person_pk                    | int(11)                                                     | NO   | PRI | NULL    | auto_increment |
| name_last                    | varchar(255)                                                | NO   | MUL |         |                |
| name_first                   | varchar(255)                                                | YES  |     | NULL    |                |
| name_index                   | int(11)                                                     | NO   |     | 0       |                |
| name_middle                  | varchar(255)                                                | YES  |     | NULL    |                |
| name_spouse_or_partner_first | varchar(255)                                                | YES  |     | NULL    |                |
| name_spouse_or_partner_last  | varchar(255)                                                | YES  |     | NULL    |                |
| name_legal_first             | varchar(255)                                                | YES  |     | NULL    |                |
| name_legal_middle            | varchar(255)                                                | YES  |     | NULL    |                |
| name_legal_last              | varchar(255)                                                | YES  |     | NULL    |                |
| prefix                       | varchar(255)                                                | YES  |     | NULL    |                |
| suffix                       | varchar(255)                                                | YES  |     | NULL    |                |
| salutation                   | varchar(255)                                                | YES  |     | NULL    |                |
| home_street1                 | varchar(255)                                                | YES  |     | NULL    |                |
| home_street2                 | varchar(255)                                                | YES  |     | NULL    |                |
| home_city                    | varchar(255)                                                | YES  |     | NULL    |                |
| home_state                   | varchar(255)                                                | YES  |     | NULL    |                |
| home_zip                     | varchar(255)                                                | YES  |     | NULL    |                |
| home_country                 | varchar(255)                                                | YES  |     | NULL    |                |
| work_org                     | varchar(255)                                                | YES  |     | NULL    |                |
| work_street1                 | varchar(255)                                                | YES  |     | NULL    |                |
| work_street2                 | varchar(255)                                                | YES  |     | NULL    |                |
| work_city                    | varchar(255)                                                | YES  |     | NULL    |                |
| work_state                   | varchar(255)                                                | YES  |     | NULL    |                |
| work_zip                     | varchar(255)                                                | YES  |     | NULL    |                |
| work_country                 | varchar(255)                                                | YES  |     | NULL    |                |
| phone_home                   | varchar(255)                                                | YES  |     | NULL    |                |
| phone_work                   | varchar(255)                                                | YES  |     | NULL    |                |
| phone_mobile                 | varchar(255)                                                | YES  |     | NULL    |                |
| phone_fax                    | varchar(255)                                                | YES  |     | NULL    |                |
| phone5                       | varchar(255)                                                | YES  |     | NULL    |                |
| phone6                       | varchar(255)                                                | YES  |     | NULL    |                |
| email                        | varchar(255)                                                | YES  |     | NULL    |                |
| email2                       | varchar(255)                                                | YES  |     | NULL    |                |
| website                      | varchar(255)                                                | YES  |     | NULL    |                |
| preferred_communication      | enum('home','work','mobile','email','mail','special')       | YES  |     | NULL    |                |
| preferred_communication_text | varchar(255)                                                | YES  |     | NULL    |                |
| preferred_address            | enum('home','work')                                         | YES  |     | NULL    |                |
| use_housing                  | tinyint(1)                                                  | YES  |     | NULL    |                |
| smoker                       | tinyint(1)                                                  | YES  |     | NULL    |                |
| pet_allergies                | tinyint(1)                                                  | YES  |     | NULL    |                |
| pets                         | tinyint(1)                                                  | YES  |     | NULL    |                |
| kids                         | tinyint(1)                                                  | YES  |     | NULL    |                |
| physical_considerations      | text                                                        | YES  |     | NULL    |                |
| dietary_needs                | text                                                        | YES  |     | NULL    |                |
| appellation                  | varchar(255)                                                | YES  |     | NULL    |                |
| bio                          | text                                                        | YES  |     | NULL    |                |
| photo                        | varchar(255)                                                | YES  |     | NULL    |                |
| include_in_directory         | tinyint(1)                                                  | YES  |     | NULL    |                |
| participant_notes            | text                                                        | YES  |     | NULL    |                |
| contact_notes                | text                                                        | YES  |     | NULL    |                |
| available_1A                 | tinyint(1)                                                  | YES  |     | NULL    |                |
| available_1P                 | tinyint(1)                                                  | YES  |     | NULL    |                |
| available_2A                 | tinyint(1)                                                  | YES  |     | NULL    |                |
| available_2P                 | tinyint(1)                                                  | YES  |     | NULL    |                |
| available_3A                 | tinyint(1)                                                  | YES  |     | NULL    |                |
| available_3P                 | tinyint(1)                                                  | YES  |     | NULL    |                |
| available_4A                 | tinyint(1)                                                  | YES  |     | NULL    |                |
| available_4P                 | tinyint(1)                                                  | YES  |     | NULL    |                |
| available_5A                 | tinyint(1)                                                  | YES  |     | NULL    |                |
| available_5P                 | tinyint(1)                                                  | YES  |     | NULL    |                |
| interest_x_dis               | tinyint(1)                                                  | YES  |     | NULL    |                |
| interest_arts                | tinyint(1)                                                  | YES  |     | NULL    |                |
| interest_bus                 | tinyint(1)                                                  | YES  |     | NULL    |                |
| interest_hc                  | tinyint(1)                                                  | YES  |     | NULL    |                |
| interest_ia                  | tinyint(1)                                                  | YES  |     | NULL    |                |
| interest_med                 | tinyint(1)                                                  | YES  |     | NULL    |                |
| interest_pol                 | tinyint(1)                                                  | YES  |     | NULL    |                |
| interest_st                  | tinyint(1)                                                  | YES  |     | NULL    |                |
| venue_manager                | tinyint(1)                                                  | YES  |     | NULL    |                |
| committee_arts               | tinyint(1)                                                  | YES  |     | NULL    |                |
| committee_bus                | tinyint(1)                                                  | YES  |     | NULL    |                |
| committee_hc                 | tinyint(1)                                                  | YES  |     | NULL    |                |
| committee_ia                 | tinyint(1)                                                  | YES  |     | NULL    |                |
| committee_pol                | tinyint(1)                                                  | YES  |     | NULL    |                |
| committee_st                 | tinyint(1)                                                  | YES  |     | NULL    |                |
| committee_students           | tinyint(1)                                                  | YES  |     | NULL    |                |
| committee_housing            | tinyint(1)                                                  | YES  |     | NULL    |                |
| committee_moderator          | tinyint(1)                                                  | YES  |     | NULL    |                |
| committee_volunteer          | tinyint(1)                                                  | YES  |     | NULL    |                |
| committee_fundraising        | tinyint(1)                                                  | YES  |     | NULL    |                |
| committee_office             | tinyint(1)                                                  | YES  |     | NULL    |                |
| committee_other              | tinyint(1)                                                  | YES  |     | NULL    |                |
| committee_notes              | text                                                        | YES  |     | NULL    |                |
| houser_fk                    | int(11)                                                     | YES  | MUL | NULL    |                |
| housed_fk                    | int(11)                                                     | YES  | MUL | NULL    |                |
| contact_fk                   | int(11)                                                     | YES  | MUL | NULL    |                |
| hyphen_fk                    | int(11)                                                     | YES  | MUL | NULL    |                |
| introduced_by_fk             | int(11)                                                     | YES  | MUL | NULL    |                |
| committee_contact_fk         | int(11)                                                     | YES  | MUL | NULL    |                |
| donor                        | tinyint(1)                                                  | YES  |     | NULL    |                |
| houser                       | tinyint(1)                                                  | YES  |     | NULL    |                |
| moderator                    | tinyint(1)                                                  | YES  |     | NULL    |                |
| producer                     | tinyint(1)                                                  | YES  |     | NULL    |                |
| committee_member             | tinyint(1)                                                  | YES  |     | NULL    |                |
| participant                  | tinyint(1)                                                  | YES  |     | NULL    |                |
| fan                          | tinyint(1)                                                  | YES  |     | NULL    |                |
| student                      | tinyint(1)                                                  | YES  |     | NULL    |                |
| volunteer                    | tinyint(1)                                                  | YES  |     | NULL    |                |
| staff                        | tinyint(1)                                                  | YES  |     | NULL    |                |
| companion                    | tinyint(1)                                                  | YES  |     | NULL    |                |
| id_number                    | int(11)                                                     | YES  |     | NULL    |                |
| deceased                     | tinyint(1)                                                  | YES  |     | NULL    |                |
| load_donation                | tinyint(1)                                                  | YES  |     | NULL    |                |
| load_panel                   | tinyint(1)                                                  | YES  |     | NULL    |                |
| load_participant             | tinyint(1)                                                  | YES  |     | NULL    |                |
| conversion_note              | text                                                        | YES  |     | NULL    |                |
| replacedby_fk                | int(11)                                                     | YES  | MUL | NULL    |                |
| companion_to_fk              | int(11)                                                     | YES  | MUL | NULL    |                |
| name_for_program             | varchar(255)                                                | YES  |     | NULL    |                |
| gender                       | enum('male','female')                                       | YES  |     | NULL    |                |
| subcommittee                 | enum('Arts','Bus','HC','IA','Pol','ST','Student','Floater') | YES  |     | NULL    |                |
| companion_type               | enum('spouse/partner','child','friend')                     | YES  |     | NULL    |                |
| days_here                    | varchar(6)                                                  | YES  |     | NULL    |                |
| new_or_returning             | enum('new','returning')                                     | YES  |     | NULL    |                |
| confirmation_sheet           | tinyint(1)                                                  | YES  |     | NULL    |                |
| bio_in                       | tinyint(1)                                                  | YES  |     | NULL    |                |
| photo_in                     | tinyint(1)                                                  | YES  |     | NULL    |                |
| birthday                     | date                                                        | YES  |     | NULL    |                |
| date_topics_letter_sent      | date                                                        | YES  |     | NULL    |                |
| topics_received              | tinyint(1)                                                  | YES  |     | NULL    |                |
| rating                       | enum('A','B','C','D','F')                                   | YES  |     | NULL    |                |
| flight_info_received         | tinyint(1)                                                  | YES  |     | NULL    |                |
| transportation_email_sent    | tinyint(1)                                                  | YES  |     | NULL    |                |
| bringing_children            | tinyint(1)                                                  | YES  |     | NULL    |                |
| date_address_verfied         | date                                                        | YES  |     | NULL    |                |
+------------------------------+-------------------------------------------------------------+------+-----+---------+----------------+
126 rows in set (0.01 sec)

mysql> select person_pk, subcommittee from person where person_pk = 1381;
+-----------+--------------+
| person_pk | subcommittee |
+-----------+--------------+
|      1381 | Floater      |
+-----------+--------------+
1 row in set (0.00 sec)

3 个答案:

答案 0 :(得分:1)

这是一个非常敏感的MySQL主题

我写过关于在DBA StackExchange中修改ENUM列表的帖子

使用填充数据执行此操作时存在风险。您应该使用空表完成此操作,然后重新加载表。

答案 1 :(得分:1)

我得出结论,这是一个错误。 MySQL在更改时报告没有错误,并在显示列的详细信息时显示新值,但它不相信新值存在。 RolandoMySQLDBA证实这是一个“敏感话题”(他的话)。

所以,我做的是这个:

  1. 创建一个名为“subcommittee2”的新枚举列。

  2. 使用旧列(更新人员设置子委员会=子委员会2)更新新列的值。

  3. 将'subcommitte'重命名为'subcommittee_old'。

  4. 将'subcommittee2'重命名为'subcommittee'。

  5. 按应用程序运行确认现在已接受新值。


    更新:现在客户端要求另一个枚举,并且使用上面的技术不起作用。这次创建一个新列,传输值,并重命名它不起作用。相同的错误消息。

    UPDATE2:所以我创建了新的列'subcommittee2',从旧列填充它,然后就这样离开了。在我的应用程序中,我更改为使用新列名称。呀,但是一个人必须完成一项工作......

    UPDATE3:我试图在另一个字段上添加枚举值,并且它有效,所以现在我有了这个理论:新添加的值必须不长于现有值。例如,在这种情况下,最长的值是'已接受',并且我添加了值'hold'和'wait',这很正常。 (回想一下原始错误是“数据被截断”。)

答案 2 :(得分:0)

根据this answer判断,似乎ENUM的先前顺序必须相同,最后的新概率。因此,我会说SHOW CREATE TABLE查看原始订单的内容,然后将Student附加到该列表的末尾。