Let’s take a closer look at MySQL enum data truncated for column error.

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Enum data truncated for column

It is common to encounter errors such as Data truncated for column ‘column_name’ at row. When trying to add a new dropdown option value of ‘departed’, the form submission would always fail with the aforementioned error.

The solution to this error is easy. Initially, the user must examine the table/field definitions. The problem occurs when the column status is of type enum. And it requires the ‘departed’ value to be explicitly enumerated in the field declaration. And, the column will show the existing enum values for the status field in the Value section.

The next step for the user is to add the new values to the table field. Then, for the status field, the user must add ‘departed’ as a new enum value. The user must then save the modifications in order for the program to function properly.

Validate Data On an Enum Column

It internally verifies table entries after creating a column name with the MySQL ENUM data type. For example, try running the INSERT command below. Run it with a non-enumerated value such as MICROFINANCE on the customer type column to see if the transaction succeeds.

mysql> INSERT INTO customers(customer_type, first_name, last_name) VALUES ('MICROFINANCE', 'A', 'B');

As MICROFINANCE is not defined in the list of acceptable input values. In this case, then the following error will happen:

ERROR 1265 (01000): Data truncated for column 'customer_type' at row 1

If MySQL STRICT TRANS TABLES is not enabled, the above INSERT command will pass. It will issue a warning:

Query OK, 1 affected row , 1 warning (0.00 sec)

Run the command below to investigate the source of the alert or the warning in detail:

mysql> SHOW WARNINGS;

The warning detail after the process will be in more detail as shown below.

+---------+------+----------------------------------------------------+
| Level | Code | Message |
+---------+------+----------------------------------------------------+
| Warning | 6521 | Data truncated for column 'customer_type' at row 1 |
+---------+------+----------------------------------------------------+
1 row in set (0.00 sec)

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Conclusion

To conclude, MySQL enum data truncated for columns is easy to avoid and manage to ensure the smooth working of the programs.