How do I add more members to my ENUM-type column in MySQL?

user_133939 0
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The MySQL reference manual does not provide a clearcut example on how to do this.

I have an ENUM-type column of country names that I need to add more countries to. What is the correct MySQL syntax to achieve this?

Here's my attempt:

ALTER TABLE carmake CHANGE country country ENUM('Sweden','Malaysia');

The error I get is: ERROR 1265 (01000): Data truncated for column 'country' at row 1.

The country column is the ENUM-type column in the above-statement.

SHOW CREATE TABLE OUTPUT:

mysql> SHOW CREATE TABLE carmake;
+---------+---------------------------------------------------------------------+
| Table   | Create Table
+---------+---------------------------------------------------------------------+
| carmake | CREATE TABLE `carmake` (
`carmake_id` tinyint(4) NOT NULL AUTO_INCREMENT,
`name` tinytext,
`country` enum('Japan','USA','England','Australia','Germany','France','Italy','Spain','Czech Republic','China','South Korea','India') DEFAULT NULL,
PRIMARY KEY (`carmake_id`),
KEY `name` (`name`(3))
) ENGINE=InnoDB AUTO_INCREMENT=49 DEFAULT CHARSET=latin1 |
+---------+---------------------------------------------------------------------+
1 row in set (0.00 sec)

SELECT DISTINCT country FROM carmake OUTPUT:

+----------------+
| country        |
+----------------+
| Italy          |
| Germany        |
| England        |
| USA            |
| France         |
| South Korea    |
| NULL           |
| Australia      |
| Spain          |
| Czech Republic |
+----------------+
alter-table enums mysql
8 Answers

In MYSQL server version: 5.0.27 i tried this and it worked fine for me check in your version

ALTER TABLE carmake
     MODIFY `country` ENUM('Japan', 'USA', 'England', 'Australia', 'Germany', 'France', 'Italy', 'Spain', 'Czech Republic', 'China', 'South Korea', 'India', 'Sweden', 'Malaysia');
user_89631750

Here is another way...

It adds "others" to the enum definition of the column "rtipo" of the table "firmas".

set @new_enum = 'others';
set @table_name = 'firmas';
set @column_name = 'rtipo';
select column_type into @tmp from information_schema.columns 
  where table_name = @table_name and column_name=@column_name;
set @tmp = insert(@tmp, instr(@tmp,')'), 0, concat(',\'', @new_enum, '\'') );
set @tmp = concat('alter table ', @table_name, ' modify ', @column_name, ' ', @tmp);
prepare stmt from @tmp;
execute stmt;
deallocate prepare stmt;
user_98741860

FYI: A useful simulation tool - phpMyAdmin with Wampserver 3.0.6 - Preview SQL: I use 'Preview SQL' to see the SQL code that would be generated before you save the column with the change to ENUM. Preview SQL

Above you see that I have entered 'Ford','Toyota' into the ENUM but I am getting syntax ENUM(0) which is generating syntax error Query error 1064#

I then copy and paste and alter the SQL and run it through SQL with a positive result.

SQL changed

This is a quickfix that I use often and can also be used on existing ENUM values that need to be altered. Thought this might be useful.

user_73820750

mysql data truncated for column 'status' at row 1 enum Above error may be caused during adding new enum values, if old values exist in records and altered ENUM do not include it

user_14593420
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