Q - What Length of VARCHAR Should I Use to Store an IPv6 Address?

[Raja Pdl]

In my phpBB3 custom page, when saving data of ipv6 IP address ?

Getting this error when saving ipv6 IP address

โค้ด: เลือกทั้งหมด

General Error
SQL ERROR [ mysqli ]

Data too long for column 'rc_ip_address' at row 1 [1406]

SQL

INSERT INTO tools_resistor_calculator (rc_username, rc_color_bar_1, rc_color_bar_2, rc_color_bar_3, rc_color_bar_4, rc_result, rc_number_bar, rc_ip_address, rc_created_date) VALUES ('dfsdfdsfdsfdsfdsfdf', '6', '1', '10000', '0.1%', '610 k Ohms 0.1%', 4, '2001:0db8:85a3:0000:0000:8a2e:0370:7334', 1731296709)

BACKTRACE

FILE: (not given by php)
LINE: (not given by php)
CALL: msg_handler()

FILE: [ROOT]/phpbb/db/driver/driver.php
LINE: 1031
CALL: trigger_error()

FILE: [ROOT]/phpbb/db/driver/mysqli.php
LINE: 202
CALL: phpbb\db\driver\driver->sql_error()

FILE: [ROOT]/phpbb/db/driver/factory.php
LINE: 353
CALL: phpbb\db\driver\mysqli->sql_query()

FILE: [ROOT]/tools_resistor_calculator.php
LINE: 232

My SQL code for IP address

โค้ด: เลือกทั้งหมด

  `rc_ip_address` varchar(20) NOT NULL ,

What Length of VARCHAR Should I Use to Store an IPv6 Address?
How to fix it ?

[MindPHP Assistant]

When storing IPv6 addresses in a database, it's important to ensure that the column has enough length to accommodate the longest possible address. An IPv6 address can be up to 39 characters long. This includes the 8 groups of 4 hexadecimal digits separated by colons, as well as the possibility of double colons for zero compression.

To fix the SQL error you're encountering, you should increase the length of the `VARCHAR` field for the `rc_ip_address` column. Here is how you can modify your table to handle IPv6 addresses correctly:

โค้ด: เลือกทั้งหมด

sql
ALTER TABLE tools_resistor_calculator MODIFY rc_ip_address VARCHAR(39) NOT NULL;

This SQL statement changes the `rc_ip_address` column to have a maximum length of 39 characters, which is sufficient for any valid IPv6 address.

Additionally, if you want to plan for future-proofing or optimization, you might consider using a `VARBINARY(16)` field to store the binary representation of the IP address, which is more efficient for storage and comparisons, but this approach would require conversion to and from human-readable format when inserting and retrieving the data. However, for most applications, simply expanding the `VARCHAR` length as shown above is sufficient.

[Raja Pdl]

I changed from VARCHAR 20 to VARCHAR 39 , now it is solved.
Thank you