The Ultimate Guide to High Availability with MariaDB
This is a read-only copy of the MariaDB Knowledgebase generated on 2024-12-18. For the latest, interactive version please visit https://mariadb.com/kb/.

INET4

MariaDB starting with 10.10.0

The INET4 data type was added in MariaDB 10.10.0

Syntax

INET4

Contents

  1. Syntax
  2. Description
  3. Examples

Description

INET4 is a data type to store IPv4 addresses, as 4-byte binary strings.

From MariaDB 11.3.0, casting from INET4 data types to INET6 is permitted, allowing for example comparisons between the two data types, and for INET 4 values to be inserted into INET6 columns.

Examples

CREATE OR REPLACE TABLE t1 (a INET4);

INSERT INTO t1 VALUES('0.0.0.0'), ('255.10.0.0'), ('255.255.255.255');

INSERT INTO t1 VALUES (0xa0000001);
INSERT INTO t1 VALUES (0xf0000000);
INSERT INTO t1 VALUES (0xff000001);

SELECT HEX(a), a FROM t1 ORDER BY a;
+----------+-----------------+
| HEX(a)   | a               |
+----------+-----------------+
| 00000000 | 0.0.0.0         |
| A0000001 | 160.0.0.1       |
| F0000000 | 240.0.0.0       |
| FF000001 | 255.0.0.1       |
| FF0A0000 | 255.10.0.0      |
| FFFFFFFF | 255.255.255.255 |
+----------+-----------------+

Casting from INET4 to INET6 is permitted, allowing direct inserts.

Before MariaDB 11.3:

CREATE TABLE t1 (a INET6);

INSERT INTO t1 VALUES('0.0.0.0'), ('255.10.0.0'), ('255.255.255.255');
ERROR 1292 (22007): Incorrect inet6 value: '0.0.0.0' for column `test`.`t1`.`a` at row 1

From MariaDB 11.3:

CREATE TABLE t1 (a INET6);

INSERT INTO t1 VALUES('0.0.0.0'), ('255.10.0.0'), ('255.255.255.255');
Query OK, 3 rows affected (0.027 sec)

Comparisons are also permitted from MariaDB 11.3:

CREATE OR REPLACE TABLE t1 (i4 INET4, i6 INET6); 
INSERT INTO t1 VALUES('10.10.10.10','::ffff:192.168.0.1');

SELECT LEAST(i4,i6) FROM t1;
+--------------------+
| LEAST(i4,i6)       |
+--------------------+
| ::ffff:10.10.10.10 |
+--------------------+
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