IS_IPV4_STRING

Description

Determine whether an IPv4-type address is a valid IPv4 address.

Syntax

IS_IPV4_STRING(<ipv4_str>)

Parameters

Parameter	Description
<ipv4_str>	An IPv4 address of type String

Return Value

If it is a correctly formatted and valid IPv4 address, return true; On the contrary, return false.

• If input is NULL, the function returns NULL.

Example

CREATE TABLE `test_is_ipv4_string` (
      `id` int,
      `ip_v4` string
    ) ENGINE=OLAP
    DISTRIBUTED BY HASH(`id`) BUCKETS 4
    PROPERTIES (
    "replication_allocation" = "tag.location.default: 1"
    );
    
insert into test_is_ipv4_string values(0, NULL), (1, '0.0.0.'), (2, ''), (3, '.'), (4, '255.255.255.255');

select id, ip_v4, is_ipv4_string(ip_v4) from test_is_ipv4_string order by id;

+------+-----------------+-----------------------+
| id   | ip_v4           | is_ipv4_string(ip_v4) |
+------+-----------------+-----------------------+
|    0 | NULL            |                  NULL |
|    1 | 0.0.0.          |                     0 |
|    2 |                 |                     0 |
|    3 | .               |                     0 |
|    4 | 255.255.255.255 |                     1 |
+------+-----------------+-----------------------+